Patent application number | Description | Published |
20080293371 | Radio Communication Device - A spatial filtering adaptable for an interference wave that appears unsteadily can be implemented and also an interference canceling ability can be increased even in a condition that the interference wave does not steadily exist. At a time of non-active communication, the signals from a plurality of interference source radio communication devices | 11-27-2008 |
20090016263 | WIRELESS BASE STATION AND TERMINAL EQUIPMENT - It is an object to provide a wireless base station and a terminal equipment capable of shortening the processing time by not requiring the detection of the spatial correlation coefficient, which is required in general technology, and simplifying the selection process for terminal equipments to be connected to each other in a wireless base station that performs spatial multiplexing transmission to a plurality of terminal equipments and a terminal equipment responding for spatial multiplexing transmission. | 01-15-2009 |
20090109943 | RADIO NETWORK SYSTEM, RADIO COMMUNICATION METHOD, AND RADIO COMMUNICATION DEVICE - A wireless network system including a first terminal for sending a request-to-send signal including information on a medium use period to a second terminal before sending data, receiving a clear-to-send signal from the second terminal, and sending data to the second terminal during the medium use period; the second terminal for receiving the request-to-send signal and sending the clear-to-send signal; a third terminal for receiving the request-to-send signal and transmitting data to a fourth terminal during the medium use period; ant the fourth terminal. Thus, it is possible to prevent occurrence of a problem that when it is judged that the wireless channel is being used, transmission of the station is suppressed. | 04-30-2009 |
20090125793 | WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD - The invention is embodied for solving a problem of occurrence of degradation of the reception characteristic caused by the interference signal component if a symbol making a determination error is contained or if an error factor caused by a propagation channel estimation error or a hardware error (carrier frequency error, sampling frequency error) is contained at the interference canceling time in a wireless communication apparatus for iteratively decoding and receiving a spatial multiplex signal. A wireless communication apparatus | 05-14-2009 |
20090147834 | RADIO COMMUNICATION APPARATUS - An object of the invention is to stabilize the convergence operation at the automatic impedance matching time and ensure the reception quality in the convergence process in a fading environment in a radio communication apparatus which performs automatic impedance matching between an antenna and a Radio frequency section to decrease the impedance matching loss, for example, when the apparatus is brought close to a human body. A radio communication apparatus of the invention includes a Radio frequency section | 06-11-2009 |
20090175367 | WIRELESS COMMUNICATION DEVICE - A wireless communication device ( | 07-09-2009 |
20090207780 | COMMUNICATION SYSTEM, BASE STATION CONTROL DEVICE, AND BASE STATION DEVICE - There are provided a communication system, a base station control device, and a base station device capable of improving communication quality. In the communication system ( | 08-20-2009 |
20090279486 | WIRELESS BASE STATION DEVICE, TERMINAL, AND WIRELESS COMMUNICATION METHOD - A wireless base station device includes a plurality of transmit weight generation sections and a beam selection section. The transmit weight generation sections generate pieces of transmit weight information used for spatial division multiplexing transmission according to different algorithms. The pieces of transmit weight information are generated based on channel information on a plurality of terminals each having one or more antennas with which the wireless base station device performs spatial division multiplexing transmission. The beam selection section selects one of the pieces of transmit weight information generated. | 11-12-2009 |
20100075693 | BASE STATION DEVICE AND RADIO COMMUNICATION DEVICE - Provided is a base station device capable of suppressing power consumption of a radio communication device and transmitting a pilot signal for measuring an uplink channel quality in a high frequency use efficiency. The base station device ( | 03-25-2010 |
20100077276 | TRANSMITTING DEVICE, RECEIVING DEVICE, ENCODER, AND ENCODING METHOD - In such a relationship between information transmitted by a primary BCH, for example, and information transmitted by a non-primary BCH as a case of the transmission for a first information sequence that is easy to keep receiving quality and a second information sequence that is difficult to keep receiving quality, a transmitting device and a receiving device are disclosed for making it possible to improve an error rate of the second information sequence. In the devices, an encoder ( | 03-25-2010 |
20100104044 | RADIO TRANSMISSION DEVICE AND RADIO RECEPTION DEVICE - Provided is a radio transmission device ( | 04-29-2010 |
20100118745 | WIRELESS COMMUNICATION APPARATUS - In a wireless communication apparatus adopting a time division duplex system for executing transmission and reception using a plurality of antennas, deviation of amplitude and phase occurring between transmission and reception circuits is detected and corrected using a communication signal. Channel estimation means 105 detects channel information based on reception output of reception circuits 104-1 to 104-N provided in a one-to-one correspondence with a plurality of antennas 101-1 to 101-N. Correction value detection means 110 finds a correction value for correcting deviation occurring between each of transmission circuits 103-1 to 103-N and each of the reception circuits 104-1 to 104-N based on the channel information. A wireless communication apparatus 100 transmits an already known signal (training signal) to a base station with which the wireless communication apparatus conducts communications. The base station executes channel estimation based on the already known signal and generates and transmits a correction signal (probe signal). The correction value detection means 110 of the wireless communication apparatus 100 detects the correction value using the correction signal (probe signal). | 05-13-2010 |
20100172421 | MIMO RECEIVER AND MIMO COMMUNICATION SYSTEM - An MIMO receiver and MIMO communication system which can have a small hardware scale even if the number of antennas used for MIMO communication. In a radio communication device ( | 07-08-2010 |
20100246711 | MULTICARRIER TRANSMITTER AND MULTICARRIER RECEIVER - A multicarrier transmitter and a multicarrier receiver both enabling improvement of the reception characteristic of hierarchical modulation multiplex communication. A base station ( | 09-30-2010 |
20100323625 | BASE STATION DEVICE, TERMINAL DEVICE, AND WIRELESS COMMUNICATION SYSTEM - A base station device ( | 12-23-2010 |
20110134850 | BASE STATION DEVICE AND TERMINAL DEVICE - A base station ( | 06-09-2011 |
20110158177 | COMMUNICATION SYSTEM, BASE STATION CONTROL DEVICE, AND BASE STATION DEVICE - There are provided a communication system, a base station control device, and a base station device capable of improving communication quality. In the communication system ( | 06-30-2011 |
20110161772 | WIRELESS COMMUNICATION DEVICE AND WIRELESS COMMUNICATION METHOD - Disclosed is a wireless communication device capable of always obtaining the optimum error rate characteristic and of keeping the number of retransmissions to a minimum for IR-based HARQ which uses LDPC encoding in the error correction encoding. With the device, an RV control unit ( | 06-30-2011 |
20110181471 | ADAPTIVE ANTENNA RADIO COMMUNICATION DEVICE - A device for estimating a direction-of-arrival of a radio wave, the device comprising an array antenna including a plurality of antenna elements for receiving a high frequency signal, a demultiplexer for demultiplexing the received high frequency signal for each of the plurality of antenna elements to generate a plurality of frequency component signals and a direction estimating unit for estimating the direction-of-arrival of the radio wave by using two or more of the plurality of frequency component signals which are contiguous in a frequency direction. | 07-28-2011 |
20110197106 | WIRELESS TRANSMISSION DEVICE, WIRELESS RECEIVING DEVICE, AND METHOD FOR TRANSMITTING ENCODED DATA - Disclosed are a wireless transmission device, wireless receiving device, and method for transmitting encoded data with which power consumption can be reduced at the receiving end in accordance with reception conditions, while resource-saving is maintained by employing an erasure correcting code (ECC). In a wireless communication device ( | 08-11-2011 |
20110222525 | TERMINAL DEVICE, BASE STATION DEVICE, AND FREQUENCY RESOURCE ALLOCATION METHOD - It is possible to realize reduction of inter-cell interference by an adaptive FFR with a low delay. A terminal ( | 09-15-2011 |
20110261762 | WIRELESS BASE STATION DEVICE, TERMINAL, AND WIRELESS COMMUNICATION METHOD - A wireless base station device includes a plurality of transmit weight generation sections and a beam selection section. The transmit weight generation sections generate pieces of transmit weight information used for spatial division multiplexing transmission according to different algorithms. The pieces of transmit weight information are generated based on channel information on a plurality of terminals each having one or more antennas with which the wireless base station device performs spatial division multiplexing transmission. The beam selection section selects one of the pieces of transmit weight information generated. | 10-27-2011 |
20110296275 | WIRELESS TRANSMISSION APPARATUS, WIRELESS RECEPTION APPARATUS, TRANSMISSION DATA FORMATION METHOD, AND DATA RECEPTION METHOD - A wireless reception apparatus ( | 12-01-2011 |
20120014244 | BASE STATION, MOBILE STATION, PILOT TRANSMISSION METHOD, AND CHANNEL ESTIMATION METHOD - Disclosed are a base station, a mobile station, a pilot transmission method, and a channel estimation method, whereby excellent zone interference blocking characteristics can be obtained and high channel estimation precision is ensured even on a propagation path with low frequency correlation similar to when transmitting on an SFN of an MBS. A pilot symbol generating unit ( | 01-19-2012 |
20120033752 | WIRELESS COMMUNICATION DEVICE AND WIRELESS COMMUNICATION METHOD - To lessen a disparity in stream mapping of transmission data when modulation data are mapped into a plurality of streams and when the plurality of streams are transmitted and received. In a wireless communication device, a stream mapper ( | 02-09-2012 |
20120099554 | WIRELESS COMMUNICATION DEVICE AND WIRELESS COMMUNICATION METHOD - The overhead of notifications of other-user modulation information contained in individual control information in a multiuser-MIMO mode is reduced. A wireless communication device according to the invention includes: a pilot sequence allocation section which allocates pilot sequence numbers that are used in spatial multiplexing streams based on modulation information of the spatial multiplexing streams to a plurality of counterparty wireless communication devices that perform multiuser-MIMO transmission; a first modulation information generation section which generates modulation information and pilot sequence allocation number information that are related to a first spatial multiplexing stream addressed to a first counterparty wireless communication device of the plurality of counterparty wireless communication devices; and a second modulation information generation section which generates modulation information related to spatial multiplexing streams addressed to other counterparty wireless communication devices excluding the first counterparty wireless communication device, in order of pilot sequence numbers allocated to the spatial multiplexing streams addressed to the other counterparty wireless communication devices excluding the first counterparty wireless communication device. The wireless communication device notifies the first counterparty wireless communication device of the modulation information and pilot sequence allocation number information which are generated by the first modulation information generation section and the second modulation information generation section. | 04-26-2012 |
20120099555 | TERMINAL APPARATUS, BASE STATION APPARATUS, FEEDBACK METHOD AND RETRANSMISSION CONTROL METHOD - Disclosed are a terminal apparatus and a base station apparatus wherein the collision of the response signals of a plurality of terminals can be avoided. A response control unit ( | 04-26-2012 |
20120120907 | WIRELESS COMMUNICATION DEVICE AND WIRELESS COMMUNICATION METHOD - A bias of reception qualities between spatial streams to a plurality of terminal devices is suppressed in a multiuser MIMO transmission. A wireless communication device according to the invention is one for performing a spatial multiplexing transmission to the plurality of terminal devices, that includes an additional data area setting section that allocates, as an additional data area, a part of a resource allocation area to which no data addressed to each terminal device of the plurality of terminal devices is allocated among resource allocation areas for the spatial multiplexing transmission which are allocated to each terminal device of the plurality of terminal devices, an additional data generator that generates additional data corresponding to the additional data area allocated by the additional data area setting section, and a transmitter that transmits the data which is addressed to each of the plurality of terminal devices and the additional data. | 05-17-2012 |
20120128105 | MULTIANTENNA RECEIVING DEVICE - A multiantenna receiving device is provided to make it possible to cope with both improvement in error rate characteristic and simplification in structure. The multiantenna receiving device is comprised of soft judgement output units for carrying out a soft judgement of a modulation signal in accordance with signal point distances between a plurality of candidate signal points with respect to a plurality of multiplexed modulation signals and a receiving signal, decoding units for obtaining digital data of the modulation signals by using the judged results obtained by the soft judgement output units, and signal point decreasing units for decreasing the number of the candidate signal points used in the soft judgement output units by recursively using a part of the digital data except self-modulation signals obtained by the decoding units. | 05-24-2012 |
20120155354 | WIRELESS COMMUNICATION APPARATUS AND RESPONSE CONTROL METHOD - A wireless communication apparatus and a response control method wherein in a case of applying Persistent Allocation (PA) to MU-MIMO, the increase in the resources to be used in the feedback can be precluded. In a terminal, a response control unit causes, based on the type of downstream allocation control information, on an error detection result obtained by an error detecting unit and on a response rule table, a response signal to be transmitted by use of an upstream response resource designated in the downstream allocation control information. In the response rule table used in reception of a notification of MU-MIMO reallocation, respective different types of response signals are associated with a first case where there are no errors in the received downstream data of the designated resource designated in the downstream allocation control information received before that notification, a second case where the notification of MU-MIMO reallocation is successfully received and further there are no errors in the received downstream data of the designated resource, and a third case where the notification of MU-MIMO reallocation is not successfully received and further there are any errors in the received downstream data of the designated resource. | 06-21-2012 |
20120213131 | WIRELESS COMMUNICATION APPARATUS - Wireless communication apparatus adopting a time division duplex system for transmission and reception using plural antennas, deviation of amplitude and phase occurring between transmission and reception circuits is detected and corrected using a communication signal. Channel estimation means detects channel information based on reception output of N reception circuits having a one-to-one correspondence with N antennas. Correction value detection means finds a correction value for correcting deviation occurring between each of N transmission circuits and each of the N reception circuits based on the channel information. A wireless communication apparatus transmits an already known signal (training signal) to a base station with which the wireless communication apparatus conducts communications. The base station executes channel estimation based on the already known signal and generates and transmits a correction signal (probe signal). The correction value detection means of the wireless communication apparatus detects the correction value using the correction signal. | 08-23-2012 |
20120287855 | WIRELESS COMMUNICATION DEVICE AND WIRELESS COMMUNICATION METHOD - A high error correction capability is kept while reducing a processing delay in application of the ECC in a multi-radio. A wireless communication device for performing data transmission by using a plurality of radio systems RAT | 11-15-2012 |
20120300704 | BASE STATION APPARATUS, TRANSMISSION SIGNAL GENERATING METHOD, MOBILE STATION APPARATUS, AND RECEPTION METHOD - A communication system has a base station control device and base station devices. The base station control device totalizes information on the number of base stations as the number of base station devices which can communicate with a mobile station device, makes Nb copies of a data frame, successively assigns integer values from 1 to Nb as stream numbers Ns to the data frames copied, and forms Nb copied data frames including Nb and Ns in header information. Copied data frames having different Ns in the header information are sent to base station devices. According to Ns and Nb, a base station device subjects the data in the copied data frame to temporal/spatial encoding to form a temporal/spatial encoding series. A mobile station device receives the temporal/spatial encoding series signal from each of the base station devices. | 11-29-2012 |
20120320861 | WIRELESS COMMUNICATIONS DEVICE AND DATA REDISTRIBUTION METHOD - A wireless communications device that transmits a multiplexed signal of a plurality of data sets of different sizes to a communications terminal includes an empty resource block detection section, which detects empty resource blocks of the data sets each of which does not use any of a predetermined number of resource blocks, from among the plurality of data sets whereto the predetermined number of resource blocks are allocated in the time direction and the frequency direction; and a data redistribution section that redistributes a part of data that is distributed in resource blocks, with respect to the data sets whereto resource including empty resource blocks are allocated, in the vicinity of pilot symbols that are disposed within the empty resource blocks. It is possible to effectively utilize the function of all the pilot symbols and improve error rate characteristics. | 12-20-2012 |
20130010858 | WIRELESS COMMUNICATION DEVICE AND WIRELESS COMMUNICATION METHOD - When controlling transmission channel parameters and video encoding parameters so as to be linked to each other in video transmission, the video quality on the receiving side is further improved. As a parameter control unit that controls video encoding parameters regarding video encoding in a video encoding unit and transmission channel parameters regarding error correction coding and modulation in a channel coding/modulation unit so as to be linked to each other, a cross layer rate control unit is provided. The cross layer rate control unit performs variable control of the GOP size according to propagation changes by reducing the GOP size when the predicted value of the PHY transmission rate is larger than a determined reference value and increasing the GOP size when the predicted value of the PHY transmission rate is equal to or less than the determined reference value. | 01-10-2013 |
20130016770 | WIRELESS COMMUNICATION DEVICE AND WIRELESS COMMUNICATION METHODAANM Kishigami; TakaakiAACI TokyoAACO JPAAGP Kishigami; Takaaki Tokyo JPAANM Imamura; DaichiAACI KanagawaAACO JPAAGP Imamura; Daichi Kanagawa JPAANM Yoshii; IsamuAACI KanagawaAACO JPAAGP Yoshii; Isamu Kanagawa JP - As a parameter control unit that controls video encoding parameters regarding video encoding in a video encoding unit and transmission channel parameters regarding error correction coding and modulation in a channel coding/modulation unit so as to be linked to each other, a cross layer rate control unit is provided. The cross layer rate control unit performs variable control of the GOP size according to propagation changes by reducing the GOP size when the amount of change in the predicted value of the PHY transmission rate is larger than a determined amount of change and increasing the GOP size when the amount of change in the predicted value of the PHY transmission rate is equal to or less than the determined amount of change. | 01-17-2013 |
20130083760 | TRANSMISSION APPARATUS AND TRANSMISSION METHOD USING A PLURALITY OF DIVIDED FREQUENCY BANDS IN A COMMUNICATION BAND - A radio communication apparatus capable of alleviating a burden in setting a transmission format and suppressing increases in the scale of the apparatus. In this apparatus, space multiplexing adaptability detection section ( | 04-04-2013 |
20130113653 | RADAR DEVICE - The disclosed technique includes transmitting a signal intermittently according to a transmission cycle having a predetermined transmission period and a non-transmission period; receiving the signal reflected from a target with reception antennas; and detecting the target from the reflected signal. A high-frequency transmission signal attenuated during the transmission period and a receipt signal received during the non-transmission period are combined together. A correlation value between a reference transmission signal and the receipt signal in the combined signal is calculated, and the amount of phase shift in an arbitrarily selected reception antenna is calculated from the correlation value of a reference reception antenna, and the correlation values of the other reception antennas. The phase component of the correlation value of the arbitrarily selected reception antenna is corrected on the basis of the amount of phase shift. | 05-09-2013 |
20130120185 | RADAR APPARATUS - A radar apparatus transmits a radio frequency transmission signal from a transmitter antenna in a given transmission period, and receives a signal of a reflected wave reflected by a target via a receiver antenna. The radar apparatus includes a transmission signal generator that generates a first transmission signal obtained by modifying a code having a third sub-code sequence and a fourth sub-code sequence coupled to each other in a first transmission period, and generates a second transmission period obtained by modifying a code having a fifth sub-code sequence and a sixth sub-code sequence coupled to each other in a second transmission period, and a transmitter RF unit that converts the first and second transmission signals into radio frequency transmission signals, and transmits the radio frequency transmission signals from the transmitter antenna. | 05-16-2013 |
20130127655 | RADAR DEVICE - A radar receiver has plural antenna system processors each for performing coherent integration on the basis of correlation values between a reception signal and a transmission signal using correction amounts for phase variations corresponding to plural Doppler frequencies, plural correlation matrix generators for generating, for each of the plural different Doppler frequencies, correlation matrices which are pieces of phase difference information relating to an arrangement of reception antennas on the basis of sets of outputs of the coherent integration, respectively, an adder for adding together outputs of the plural correlation matrix generators, and an incoming direction estimator for estimating an incoming direction of reflection waves on the basis of outputs of the adder. | 05-23-2013 |
20130135140 | RADAR DEVICE - A high-frequency transmission signal is transmitted from a transmission antenna with a predetermined transmission period, and a signal of a reflected wave reflected from a target is received by a reception antenna. A code generator generates a first code sequence and second code sequence that constitute a pair of complementary codes. A first modulator modulates the first code sequence to generate a first transmission signal. A second modulator modulates the second code sequence to generate a second transmission signal. A quadrature modulator performs quadrature modulation by using the generated first and second transmission signals. The high-frequency transmission signal is generated from a signal that is quadrature modulated, and transmitted from the transmission antenna. | 05-30-2013 |
20130145228 | ENCODING METHOD - An encoder and decoder using LDPC-CC (Low Density Parity Check-Convolutional Codes) is disclosed. The encoder exhibits encoding rates realized with a small circuit-scale and a high data reception quality. In the encoder ( | 06-06-2013 |
20130147655 | RADAR APPARATUS - A radar apparatus transmits a high-frequency transmission signal, and receives a signal of a reflective wave reflected by a target. Given a first code sequence of a first code length, a second code sequence of a second code length which is longer than the first code sequence, and a third code sequence obtained by inverting each code of the first code sequence, a first transmission signal obtained by modulating the first code sequence, a second transmission signal obtained by modulating the second code sequence, a third transmission signal obtained by modulating the third code sequence and a fourth transmission signal obtained by modulating the second code sequence are generated in a first transmission period, a second transmission period, a third transmission period and a fourth transmission period respectively. | 06-13-2013 |
20130162465 | RADAR DEVICE - A radar device includes a signal generator that generates an intermittent signal having a prescribed signal width and signal interval, a transmission signal position adjuster that outputs a transmission signal while adjusting positions of the intermittent signal on the time axis, an RF transmitter that transmits the transmission signal, an RF receiver that receives a reception signal including reflection waves reflected from an object in a measurement subject space, an AD converter that converts the reception signal into a digital signal, and an object detector that detects the object based on the reception signal. The transmission signal position adjuster outputs a transmission signal in which positions of respective signal units of the intermittent signal on the time axis are adjusted in units of a time adjustment amount that is shorter than a sampling interval of the AD converter. | 06-27-2013 |
20130176166 | RADAR DEVICE - A first sector radar generates signals which are obtained by modulating a first code sequence at a first transmission cycle, obtained by modulating a second code sequence at a second transmission cycle, obtained by modulating the first code sequence at a third transmission cycle, and obtained by modulating the second code sequence at a fourth transmission cycle respectively. A second sector radar generates signals which are obtained by modulating the second code sequence at the first transmission cycle, obtained by modulating, at the second transmission cycle, a third code sequence having the opposite polarity to the first code sequence, obtained by modulating, at the third transmission cycle, a fourth code sequence having the opposite polarity to the second code sequence, and obtained by modulating the first code sequence at the fourth transmission cycle respectively. | 07-11-2013 |
20130201944 | RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION METHOD, BASE STATION DEVICE, AND TERMINAL DEVICE - A base station apparatus performs a radio communication with a terminal apparatus using a spatial division multiplex access method in a downlink. The base station apparatus includes a simultaneous connection information generation section that generates a simultaneous connection information data sequence, which includes a pilot sequence number concerning a number of a pilot signal assigned to another terminal apparatus. The base station apparatus also includes a multiplexing section that multiplexes a signal of the generated simultaneous connection information data sequence with a dedicated data signal which indicates data to be transmitted to the terminal apparatus. The base station apparatus further includes a transmission section that transmits, to the terminal apparatus, the multiplexed signal which includes the simultaneous connection information data sequence, and transmits, to the terminal apparatus, a unique pilot signal which is different from the aforementioned pilot signal assigned to the another terminal apparatus. | 08-08-2013 |
20130229297 | RADAR APPARATUS - A pulse signal is produced in a pulse generating section, and repetitively transmitted from an antenna at constant time intervals. A reception signal, received through an antenna and including a reflective wave from an object, is amplified and gain-adjusted. Thereafter, a distance detecting section detects a reception pulse of the reflected wave, and calculates the distance to the object. The variable attenuator attenuates the reception signal by a gain adjusted in accordance with a gain control signal. The gain of the variable attenuator is controlled so as to be maximum immediately after the pulse signal is transmitted, and to be reduced with elapse of time. Based on a gain adjustment timing signal, a gain adjustment timing when the attenuation amount is changed is made different for each transmission of the pulse signal. | 09-05-2013 |
20130241766 | RADAR DEVICE - Under control of a first transmission code controlling section, a first radar transmitting section periodically transmits a first radar transmission signal with a first transmission period based on a first transmission trigger signal produced after elapse of a first delay time period from reception of a predetermined synchronization establishment signal by a first transmission trigger signal producing section. Under control of a second transmission code controlling section, a second radar transmitting section periodically transmits a second radar transmission signal with a second transmission period similarly. In accordance with the first delay time period and the second delay time period, arrival times of interference signals from the first radar transmitting section and the second radar transmitting section are within transmission zones of the second radar transmission signal and the first radar transmission signal. | 09-19-2013 |
20140062763 | RADAR DEVICE - A transmission beam control unit | 03-06-2014 |
20140064264 | WIRELESS COMMUNICATION DEVICE - A WiGig wireless device partially performs a masking processing on a preamble of a transmission signal frame and generates a repetition pattern of the same pulse capable of being used in a correlation detection of a sensor. That is, a repetition pattern of a Golay code is output by intermittently performing the masking processing on the Golay code sequence. The sensor performs the correlation detection using a pulse compression technology, thereby detecting the antenna radiation pattern even in an environment where a reflected wave is generated, by separating the direct wave and the reflected wave. | 03-06-2014 |
20140068370 | CONVOLUTIONAL CODE ENCODING METHOD - An encoder and decoder using LDPC-CC (Low Density Parity Check-Convolutional Codes) is disclosed. In the encoder ( | 03-06-2014 |
20140085127 | RADAR DEVICE - A radar transmitting unit Tx transmits a radio-frequency radar transmission signal from a transmission antenna which is inclined in the direction of a depression angle φ. A radar receiving unit Rx estimates the height and speed of a vehicle which travels on a road surface using a reflected wave signal from the vehicle. A template generating unit generates a variation in a phase component of the reflected wave signal corresponding to N heights and speeds of the vehicle as N templates. N vehicle height/speed template correlation calculation units # | 03-27-2014 |
20140085128 | RADAR DEVICE - A first radar transmitter and a second radar transmitter transmit a first modulation signal and a second modulation signal which are generated by repeating a predetermined time of code sequences, each of which has a predetermined code length, using a first code width and a second code width, respectively. An A/D converter converts the modulation signal into a discrete signal in a sampling cycle shorter than a difference between the first code width and the second code width. A positioning section separates a plurality of reception signals using a first correlation value based on outputs from the A/D converter and a first delay section corresponding to the first code width and a second correlation value based on outputs from the A/D converter and a second delay section corresponding to the second code width. | 03-27-2014 |
20140111367 | RADAR APPARATUS - A pulse transmission controller generates transmission timing signals for a high-frequency radar transmission signal in every transmission cycle. A transmission phase shifter gives a transmission signal generated by a modulator phase shifts each corresponding to a transmission cycle on the basis of the transmission timing signals generated at intervals that are equal to the transmission cycle. A reception phase shifter gives a reception signal that is output from an A/D converter reception phase shifts that are opposite in direction to the respective transmission phase shifts given by the transmission phase shifter on the basis of the transmission timing signals generated at intervals that are equal to the transmission cycle. | 04-24-2014 |
20140192923 | PHASED ARRAY TRANSMISSION DEVICE - Transmission outputs of a plurality of transmission branches ( | 07-10-2014 |
20140325304 | ENCODING METHOD, ENCODER, AND DECODER - A low-density parity check convolution code (LDPC-CC) is made, and a signal sequence is sent after being subjected to an error-correcting encodement using the low-density parity check convolution code. In this case, a low-density parity check code of a time-variant period (3g) is created by linear operations of first to 3g-th (letter g designates a positive integer) parity check polynomials and input data. | 10-30-2014 |
20140327567 | RADAR DEVICE - Each antenna system processor performs coherent integration on a prescribed number of correlation values between a reception signal and a transmission code. A correlation matrix generator generates a correlation matrix on the basis of coherent integration values. A distance estimator estimates a distance to a target. A direction vector storage is stored with direction vectors each of which includes an azimuth component with respect to a target and an elevation angle component of a line connecting a transmission antenna and the target in which a prescribed direction is used as a reference. An incoming direction estimator estimates a signal incoming direction from the target using the correlation matrix and the direction vectors in which the elevation angle component range is restricted on the basis of the distance to the target. | 11-06-2014 |
20150039974 | TRANSMISSION APPARATUS AND ASSOCIATED METHOD OF ENCODING TRANSMISSION DATA - An encoder and decoder using LDPC-CC (Low Density Parity Check—Convolutional Codes) is disclosed. In the encoder ( | 02-05-2015 |
20150048967 | RADAR SYSTEM - Respective sector radars generate first and second transmission signals by multiplying any one Spano code sequence and any one orthogonal code sequence, selected among 2 | 02-19-2015 |
20150061915 | RADAR APPARATUS - A radar transmitter Tx | 03-05-2015 |
20150061922 | RADAR APPARATUS - A radar receiver receives reflection wave signals which are a radar transmission signal reflected by a target with plural respective antenna system processors, and estimates an incoming direction of the reflection wave signals. A correlation vector power calculator calculates a correlation vector power based on a correlation vector including outputs of the plural respective antenna system processors. A direction vector correlation calculator calculates a direction vector correlation power on the basis of the correlation vector and a direction vector including information of amplitude and phase deviations that occur between the plural respective antenna system processors for each azimuth angle range of an incoming direction of the reflection wave signals. A distance/azimuth angle detector estimates an azimuth angle of an incoming direction of the refection wave signals based on the correlation vector power and the direction vector correlation power. | 03-05-2015 |