Patent application number | Description | Published |
20100128822 | OFDM RECEIVING APPARATUS, OFDM RECEIVING METHOD, OFDM RECEIVING CIRCUIT, INTEGRATED CIRCUIT, AND PROGRAM - A synchronization section | 05-27-2010 |
20110211630 | INTER-CARRIER INTERFERENCE REMOVAL DEVICE AND RECEPTION DEVICE USING THE SAME - An inter-carrier interface removal device can improve estimation accuracy of inter-carrier interference caused by Doppler shift in a received multi-carrier signal moving at a high speed, and a reception characteristic of the multi-carrier signal after removing the inter-carrier interference. The inter-carrier interference removal device includes a channel estimation unit estimating a channel frequency characteristic according to a carrier signal, an equalization unit equalizing the carrier signal with the channel frequency characteristic and outputs tentative carrier data, a reliability value calculation unit calculating a reliability value according to the channel frequency characteristic, a weighting unit weighting the tentative carrier data with the reliability value, an ICI component estimation unit estimating an ICI component according to the weighted tentative carrier data and the estimated channel frequency characteristic, and an ICI removal calculation unit removing the ICI component from the carrier signal. | 09-01-2011 |
20110317682 | OFDM TRANSMITTER DEVICE, OFDM TRANSMISSION METHOD, OFDM RECEIVER DEVICE, AND OFDM RECEPTION METHOD - An OFDM transmitter and an OFDM receiver respectively transmit and receive N (N≧2, N is an integer) control symbols. For each control symbol, a guard interval time-domain signal is, for example, identical to a signal obtained by frequency-shifting at least a portion of a useful symbol time-domain signal by an amount different from any other symbol, or to a signal obtained by frequency-shifting one or both of a portion and a span of a useful symbol interval time-domain signal different from any other symbol by a predetermined amount. | 12-29-2011 |
20110317785 | PILOT PATTERNS FOR OFDM SYSTEMS WITH MULTIPLE ANTENNAS - The present invention relates to orthogonal frequency-division multiplexing (OFDM) communication systems with multiple transmit antennas receive antennas, and in particular to methods for inserting scattered pilots (SPs) into the transmit signals of such OFDM systems, for estimating channel properties on the basis of the scattered pilots, a multi-antenna OFDM transmitter, and an OFDM receiver. In this context, it is the particular approach of the present invention to keep the same SP pattern like in the single-transmitter case, to partition the pilots into as many subsets as there are transmitters (transmit antennas), and to interleave these subsets both in time and in frequency. In this manner, the granularity of pilots of the same subset is reduced. This offers increased flexibility in designing the scattered pilot patterns and greater accuracy of the estimated channel properties. | 12-29-2011 |
20120121034 | TRANSMISSION METHOD, TRANSMISSION APPARATUS, RECEPTION METHOD AND RECEPTION APPARATUS - All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ. A modulated signal with such data symbols arranged therein is transmitted. | 05-17-2012 |
20120219089 | TRANSMISSION METHOD AND TRANSMISSION APPARATUS - All data symbols used in data transmission of a modulated signal are precoded by switching between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol along the frequency axis and the time axis all differ. A modulated signal with such data symbols arranged therein is transmitted. | 08-30-2012 |
20120224651 | SIGNAL GENERATION METHOD AND SIGNAL GENERATION APPARATUS - A transmission method simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device. | 09-06-2012 |
20120288029 | TRANSMITTER, TRANSMISSION METHOD, RECEIVER, RECEPTION METHOD, PROGRAM, AND INTEGRATED CIRCUIT - A transmitter | 11-15-2012 |
20120300877 | PRECODING METHOD, TRANSMITTING DEVICE, AND RECEIVING DEVICE - A transmission scheme for transmitting a first modulated signal and a second modulated signal in the same frequency at the same time. According to the transmission scheme, a precoding weight multiplying unit multiplies a precoding weight by a baseband signal after a first mapping and a baseband signal after a second mapping and outputs the first modulated signal and the second modulated signal. In the precoding weight multiplying unit, precoding weights are regularly hopped. | 11-29-2012 |
20120307159 | TRANSMITTING APPARATUS, RECEIVING APPARATUS, TRANSMITTING METHOD, AND RECEIVING METHOD - In order to implement both a physical later pipe (PLP) structure and a plurality of receiver classes, a transmitting apparatus includes: a signaling information generation unit which generates signaling information including a transmission parameter for each of PLPs; a PLP processing group which performs processing based on the transmission parameter for each of the PLPs; and a transmitting unit which transmits data including the generated signaling information and PLP data for each of the PLPs. The PLP data is received by a receiving apparatus that is indicated by a flag of the PLP and is not received by another receiving apparatus, the receiving apparatuses being included in a plurality of receiving apparatuses classified under a plurality of states. The generated signaling information includes, as the transmission parameter for each of the PLPs, the flag of the PLP. | 12-06-2012 |
20120307842 | TRANSPORT STREAM PACKET HEADER COMPRESSION - A demultiplexer | 12-06-2012 |
20130089164 | PRE-CODING METHOD AND TRANSMITTER - Disclosed is a transmission scheme for transmitting a first modulated signal and a second modulated signal over the same frequency at the same time. According to the transmission scheme, a precoding weight multiplying unit multiplies a baseband signal after a first mapping and a baseband signal after a second mapping by a precoding weight and outputs the first modulated signal and the second modulated signal. In the precoding weight multiplying unit, precoding weights are regularly hopped. | 04-11-2013 |
20130114752 | TRANSMISSION METHOD, TRANSMITTER APPARATUS, RECEPTION METHOD AND RECEIVER APPARATUS - Transmission quality is improved in an environment in which direct waves dominate in a transmission method for transmitting a plurality of modulated signals from a plurality of antennas at the same time. All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ. A modulated signal with such data symbols arranged therein is transmitted. | 05-09-2013 |
20130121306 | SIGNAL GENERATION METHOD AND SIGNAL GENERATION DEVICE - A transmission method simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device. | 05-16-2013 |
20130121307 | METHOD OF SIGNAL GENERATION AND SIGNAL GENERATING DEVICE - A transmission method simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device. | 05-16-2013 |
20130121438 | PRECODING METHOD, AND TRANSMITTING DEVICE - Disclosed is a transmission scheme for transmitting a first modulated signal and a second modulated signal in the same frequency at the same time. According to the transmission scheme, a precoding weight multiplying unit multiplies a precoding weight by a baseband signal after a first mapping and a baseband signal after a second mapping and outputs the first modulated signal and the second modulated signal. In the precoding weight multiplying unit, precoding weights are regularly hopped. | 05-16-2013 |
20130121441 | TRANSMISSION METHOD, TRANSMISSION DEVICE, RECEPTION METHOD, AND RECEPTION DEVICE - Provided is a precoding method for generating, from a plurality of baseband signals, a plurality of precoded signals to be transmitted over the same frequency bandwidth at the same time, including the steps of selecting a matrix F[i] from among N matrices, which define precoding performed on the plurality of baseband signals, while switching between the N matrices, i being an integer from 0 to N−1, and N being an integer at least two, generating a first precoded signal z | 05-16-2013 |
20130136208 | SIGNAL GENERATION METHOD AND SIGNAL GENERATION DEVICE - A transmission method simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device. | 05-30-2013 |
20130322566 | PRECODING METHOD, PRECODING DEVICE - Disclosed is a precoding method for generating, from a plurality of baseband signals, a plurality of precoded signals that are transmitted in the same frequency bandwidth at the same time. According to the precoding method, one matrix is selected from among matrices defining a precoding process that is performed on the plurality of baseband signals by hopping between the matrices. A first baseband signal and a second baseband signal relating to a first coded block and a second coded block generated by using a predetermined error correction block coding scheme satisfy a given condition. | 12-05-2013 |
20140029509 | SIGNAL GENERATING METHOD AND SIGNAL GENERATING DEVICE - A transmission method of simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals. One of signal generation processing in which phase change is performed and signal generation processing in which phase change is not performed is selectable, thereby improving general versatility in signal generation. | 01-30-2014 |
20140037029 | RELAY METHOD AND RELAY DEVICE - Disclosed is a relay method including: receiving, as input, respective reception signals by two receive antennas, the reception signals each including a reception signal resulting from multiplexing respective transmission signals transmitted by two transmission antennas in a first frequency band; performing frequency conversion on the reception signal received by one of the receive antennas so as to obtain a signal of a third frequency band; and performing frequency multiplexing on the signal having the third frequency band and the reception signal received by the other of the receive antennas. | 02-06-2014 |
20140044218 | PRE-CODING METHOD AND PRE-CODING DEVICE - Disclosed is a precoding method comprising the steps of: generating a first coded block and a second coded block with use of a predetermined error correction block coding scheme; generating a first precoded signal z1 and a second precoded signal z2 by performing a precoding process, which corresponds to a matrix selected from among the N matrices F[i], on a first baseband signal s1 generated from the first coded block and a second baseband signal s2 generated from the second coded block, respectively; the first precoded signal z1 and the second precoded signal z2 satisfying (z1, z2) | 02-13-2014 |
20140093013 | TRANSMISSION DEVICE, TRANSMISSION METHOD, RECEIVING DEVICE AND RECEIVING METHOD - Provided is a frame configuration usable for both SISO transmission and MISO and/or MIMO transmission. According to the frame configuration, a frame has a preamble, a control symbol, and transmission data symbols. A transmission device includes the designation of a transmission scheme of the transmission data symbols in the control symbol and includes the designation of a transmission scheme of the control symbol in the preamble. This improves the reception performance (detection performance) of a reception device. | 04-03-2014 |
20140098914 | RECEIVING METHOD AND RECEIVING APPARATUS - All data symbols used in data transmission of a modulated signal are precoded by switching between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol along the frequency axis and the time axis all differ. A modulated signal with such data symbols arranged therein is transmitted. | 04-10-2014 |
20140105322 | TRANSMISSION DEVICE, TRANSMISSION METHOD, RECEIVING DEVICE AND RECEIVING METHOD - Provided is a frame configuration usable for both SISO transmission and MISO and/or MIMO transmission. A frame configurator of a transmission device configures a frame by gathering data for SISO and configures a frame by gathering data for MISO and/or MIMO data, thereby to improve the reception performance (detection performance) of a reception device. | 04-17-2014 |
20140133589 | TRANSMISSION DEVICE, TRANSMISSION METHOD, RECEIVING DEVICE AND RECEIVING METHOD - A transmission device transmits by performing SISO using a first polarization and by performing MISO and MIMO using the first (V) polarization and a second (H) polarization. For SISO communication, transmission is performed using an antenna having the first (V) polarization. For MISO and MIMO communication, transmission is performed using the antenna having the first (V) polarization and an antenna having the second (H) polarization. Accordingly, a reception device equipped only with a system for the antenna having the first (V) polarization is able to continue receiving the transmit data by SISO. | 05-15-2014 |
20140133599 | TRANSMISSION DEVICE, TRANSMISSION METHOD, RECEIVING DEVICE AND RECEIVING METHOD - Provided is control information related to polarizations of antennas for MISO communication. The control signal generator generates polarization information indicating whether antennas used for transmission by MISO have only a first polarization or have a second polarization as well as the first polarization. With this structure, the present invention allows for the use of combinations of SISO, MISO and MIMO, taking the polarization of antennas. Furthermore, the present invention enables the receiver to reduce the power consumption. | 05-15-2014 |
20140146915 | TRANSMISSION DEVICE, TRANSMISSION METHOD, RECEIVING DEVICE AND RECEIVING METHOD - Provided is a frame configuration usable for both SISO transmission and MISO and/or MIMO transmission. A frame configurator of a transmission device configures a frame by gathering data for SISO and configures a frame by gathering data for MISO and/or MIMO data, thereby to improve the reception performance (detection performance) of a reception device. | 05-29-2014 |
20140205032 | SIGNAL GENERATING METHOD AND SIGNAL GENERATING DEVICE - A transmission method for transmitting a first modulated signal and a second modulated signal in the same frequency at the same time. Each signal has been modulated according to a different modulation scheme. The transmission method applies precoding on both signals using a fixed precoding matrix, applies different power change to each signal, and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device. | 07-24-2014 |
20140219389 | SIGNAL GENERATING METHOD AND SIGNAL GENERATING APPARATUS - A transmission method for simultaneously transmitting a first modulated signal and a second modulated signal at the same frequency includes performing precoding on both signals using a fixed precoding matrix and regularly changing the phase of at least one of the signals. In this method, the power ratio between a plurality of signals transmitted from a plurality of antennas at the same frequency and at the same time differs from the power ratio between a plurality of pilot signals transmitted from the plurality of antennas at the same frequency and at the same time, whereby the accuracy of channel estimation by a reception device is improved. | 08-07-2014 |
20140241476 | RECEIVING METHOD AND RECEIVING APPARATUS - All data symbols used in data transmission of a modulated signal are precoded by switching between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol along the frequency axis and the time axis all differ. A modulated signal with such data symbols arranged therein is transmitted. | 08-28-2014 |
20140286451 | PRECODING METHOD, TRANSMITTING DEVICE, AND RECEIVING DEVICE - A transmission scheme for transmitting a first modulated signal and a second modulated signal in the same frequency at the same time. According to the transmission scheme, a precoding weight multiplying unit multiplies a precoding weight by a baseband signal after a first mapping and a baseband signal after a second mapping and outputs the first modulated signal and the second modulated signal. In the precoding weight multiplying unit, precoding weights are regularly hopped. | 09-25-2014 |
20140321572 | OFDM TRANSMITTER DEVICE HAVING A SYMBOL GENERATOR FOR GENERATING NON-ZERO CONTROL SYMBOLS, AND OFDM TRANSMISSION METHOD INCLUDING GENERATING NON-ZERO CONTROL SYMBOLS - An OFDM transmitter and an OFDM receiver respectively transmit and receive N (N≧2, N is an integer) control symbols. For each control symbol, a guard interval time-domain signal is, for example, identical to a signal obtained by frequency-shifting at least a portion of a useful symbol time-domain signal by an amount different from any other symbol, or to a signal obtained by frequency-shifting one or both of a portion and a span of a useful symbol interval time-domain signal different from any other symbol by a predetermined amount. | 10-30-2014 |
20140341317 | TRANSMISSION METHOD, TRANSMISSION DEVICE, RECEPTION METHOD, AND RECEPTION DEVICE - Provided is a precoding method for generating, from a plurality of baseband signals, a plurality of precoded signals to be transmitted over the same frequency bandwidth at the same time, including the steps of selecting a matrix F[i] from among N matrices, which define precoding performed on the plurality of baseband signals, while switching between the N matrices, i being an integer from 0 to N−1, and N being an integer at least two, generating a first precoded signal z1 and a second precoded signal z2, generating a first encoded block and a second encoded block using a predetermined error correction block encoding method, generating a baseband signal with M symbols from the first encoded block and a baseband signal with M symbols the second encoded block, and precoding a combination of the generated baseband signals to generate a precoded signal having M slots. | 11-20-2014 |
20140348257 | PRE-CODING METHOD AND TRANSMITTER - Disclosed is a transmission scheme for transmitting a first modulated signal and a second modulated signal over the same frequency at the same time. According to the transmission scheme, a precoding weight multiplying unit multiplies a baseband signal after a first mapping and a baseband signal after a second mapping by a precoding weight and outputs the first modulated signal and the second modulated signal. In the precoding weight multiplying unit, precoding weights are regularly hopped. | 11-27-2014 |
20140362947 | PILOT PATTERNS FOR OFDM SYSTEMS WITH MULTIPLE ANTENNAS - The present invention relates to orthogonal frequency—division multiplexing (OFDM) communication systems with multiple transmit antennas receive antennas, and in particular to methods for inserting scattered pilots (SPs) into the transmit signals of such OFDM systems, for estimating channel properties on the basis of the scattered pilots, a multi-antenna OFDM transmitter, and an OFDM receiver. In this context, it is the particular approach of the present invention to keep the same SP pattern like in the single-transmitter case, to partition the pilots into as many subsets as there are transmitters (transmit antennas), and to interleave these subsets both in time and in frequency. In this manner, the granularity of pilots of the same subset is reduced. This offers increased flexibility in designing the scattered pilot patterns and greater accuracy of the estimated channel properties. | 12-11-2014 |
20140362948 | TRANSMISSION METHOD, TRANSMITTER APPARATUS, RECEPTION METHOD AND RECEIVER APPARATUS - Transmission quality is improved in an environment in which direct waves dominate in a transmission method for transmitting a plurality of modulated signals from a plurality of antennas at the same time. All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ. A modulated signal with such data symbols arranged therein is transmitted. | 12-11-2014 |
20150016570 | METHOD OF SIGNAL GENERATION AND SIGNAL GENERATING DEVICE - A transmission method simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device. | 01-15-2015 |
20150085952 | SIGNAL GENERATION METHOD AND SIGNAL GENERATION DEVICE - A transmission method simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device. | 03-26-2015 |