Class / Patent application number | Description | Number of patent applications / Date published |
455630300 | Frequency switching | 28 |
20090036057 | METHOD OF AND SYSTEM FOR TRANSMITTING SIGNALS USING FREQUENCY HOPPING - Method of and system for transmitting signals, e.g. control signals, request signals, interrogation signals etc. in a control system comprising at least two units, wherein at least one of said units is designed to operate as a master unit and wherein at least one of said units is designed to operate as a slave unit,
| 02-05-2009 |
20090130982 | METHOD FOR UPDATING AUDIO COMMUNICATION FREQUENCIES BETWEEN AIRCRAFT AND ATC STATIONS ON THE GROUND - The present invention relates to a method for automatically preparing an update of audio communication frequencies between aircraft and ATC stations on the ground, a method making it possible to reduce the communication time associated with the necessary frequency changes between control sectors, therefore limiting the frequency space requirement, and reducing the workload due to the manipulations and control of these frequency changes, both for the air traffic controllers and for the aircraft crews, and wherein the flight plan or the current trajectory followed by the aircraft is dynamically coupled with the geometry information of the control sectors overflown by the aircraft and that, thereby knowing the intersection points of the flight plan with the sector limits, the frequency changes and sector name are prepared before each change of sector, while warning the pilot of their imminence. | 05-21-2009 |
20090170440 | Interference Mitigation in Wireless Networks - A method of mitigating interference between a private access point and an access terminal in a radio access network, where the private access point uses a shared carrier frequency that is shared with a macro access point, and where the access terminal has an idle operational state and an active operational state, includes directing the access terminal to move to a first carrier frequency other than the shared carrier frequency if the access terminal operates on the shared carrier frequency in the active operational state. The access terminal is configured to communicate with the macro access point and the access terminal is not authorized to communicate with the private access point. N carrier frequencies are used by the macro access point, where N≧2. | 07-02-2009 |
20090209208 | METHOD AND SYSTEM FOR SHARING MODULATION INFORMATION BETWEEN MULTIPLE ACCESS POINTS - Aspects of a method and system for sharing modulation information between multiple access points may include receiving modulation control information and demodulation control information at an access point comprising one or more receivers and one or more transmitters. One or more modulation frequencies may be adjusted and utilized to generate transmit signals by the one or more transmitters based on the received modulation control information. One or more demodulation frequencies may be adjusted and utilized to generate intermediate frequency signals by the one or more receivers based on the received demodulation control information. The modulation control information and the demodulation control information may be received via a control point. The modulation control information and demodulation control information may be received on a link operating in a frequency band different from said transmit frequencies and said receive frequencies. | 08-20-2009 |
20090247085 | COMMUNICATION SYSTEM - A communication system includes a main communication unit, a subcommunication unit that communicates with the main communication unit by using first wireless channels, and an external communication unit that communicates with the main communication unit by using second wireless channels. The subcommunication unit includes a state detection unit that detects a use state of the second wireless channels. The main communication unit includes a state acquisition unit that acquires the use state of the second wireless channels, a selection unit that selects a predetermined number of the first wireless channels with the less effect of radio wave interaction in the wireless communications based on the use state, a channel determination unit that determines one of the predetermined number of the first wireless channels, and a first wireless communication unit that communicates with the subcommunication unit using the one of the predetermined number of the first wireless channels. | 10-01-2009 |
20090311964 | COMMUNICATION APPARATUS AND CONTROL METHOD - A communication apparatus which performs communication under control of a base station includes a detection unit to detect a signal sent from another wireless system interfering with a first frequency channel, a disconnection unit to disconnect communication performed in the first frequency channel when the signal interfering with the first frequency channel is detected, a determination unit to determine whether the base station is communicating using the first frequency channel when the communication has been disconnected, and a control unit, when it is determined that the base station is not communicating using the first frequency channel, to search for a second frequency channel used by the base station and communicate with the base station by using the second frequency channel and/or when the it is determined that the base station is communicating using the first frequency channel, to notify a user that communication has been disconnected. | 12-17-2009 |
20100029215 | METHOD AND DEVICE FOR CONTROLLING RADIO ACCESS - A method for controlling a number of simultaneous radio connections in a communication device is presented. The control of a number of simultaneous radio connections is carried out in the communication device. Parameters of the radio connections are controlled such that interference between the radio connections is minimized. | 02-04-2010 |
20100144282 | METHODS AND APPARATUS OF PROVIDING TRANSMIT DIVERSITY IN A MULTIPLE ACCESS WIRELESS COMMUNICATION SYSTEM - Methods and apparatus for providing channel diversity to wireless terminals (WTs) in a manner that reduces the latency between the time a WT encounters satisfactory channel conditions are described. A plurality of communications channels with different physical characteristics are maintained in a cell by a base station (BS). Each WT monitors multiple channels and maintains multiple channel estimates at the same time so that rapid switching between channels is possible. Channel quality information is conveyed from each WT to the BS. The WT or BS selects a channel based on the measured channel quality. By supporting multiple channels and by introducing periodic variations into the channels in various embodiments, the time before a WT encounters a channel with good or acceptable channel conditions is minimized even if the WT does not change location. Multiple antennas are used at the BS to support numerous channels simultaneously, e.g., by controlling antenna patterns. | 06-10-2010 |
20100197235 | Coexistence of Plural Wireless Communication Transceivers in Close Proximity - A communication device has a plurality of concurrently operating transceivers, each operating in a respectively different one of a plurality of communication systems, wherein the plurality of concurrently operating transceivers includes a first transceiver and a second transceiver. Operation of the communication device includes the first transceiver ascertaining whether transmissions by the second transceiver are causing interference in a receiver of the first transceiver and if so, performing one or more interference response actions. The one or more interference response actions include ascertaining whether the interference is at an acceptable level and if so then taking no further interference response actions. If the interference is ascertained to be at an unacceptable level, an interference mitigation request is communicated to the second transceiver. The second transceiver can, for example, shift its use of frequencies to a region whereby the first transceiver's band select filter can sufficiently attenuate the second transceiver's signal. | 08-05-2010 |
20100222003 | RADIO COMMUNICATION SYSTEM, RADIO BASE STATION DEVICE, AND TRANSMISSION CONTROL METHOD - It is possible to provide a transmission control method, a radio communication system, and a radio base station device which can reduce the time required until an inter-cell interference is reduced so as to improve the system throughput. A base station ( | 09-02-2010 |
20100233963 | CONTROLLER AND METHOD FOR USE IN RADIO STATION IN RADIO COMMUNICATION SYSTEM - One aspect of the present invention relates to a controller for a radio station. The controller includes an information acquisition unit acquiring radio communication state information on another radio station different from the radio station via a connected backbone network, the radio communication state information including frequency information and waveform feature information, a waveform information extraction unit calculating a waveform feature based on the waveform feature information, the waveform feature indicating whether a received radio signal includes the radio signal transmitted from the other radio station, and a radio resource parameter determination unit determining whether signal transmission from the radio station is available and specify a radio resource to be used for the signal transmission based on the frequency information, the waveform feature information and/or the calculated waveform feature. | 09-16-2010 |
20100273428 | Wireless Communication Apparatus, Wireless Communication Method, Computer Program, and Wireless Communication System - A wireless communication apparatus includes: a first wireless communication section performing wireless communication on the basis of a first communication mode; a second wireless communication section performing wireless communication on the basis of a second communication mode using a different frequency band from the first communication mode; a beam learning signal generation section generating a beam learning signal for specifying a beam pattern at the time of the communication based on the second communication mode and transmitting the beam learning signal from the second wireless communication section; a response information acquisition section acquiring response information responding to the transmitted beam learning signal; and a preliminary information generation section generating preliminary information so as not to cause interference among a plurality of wireless communications using the second communication mode on the basis of the response information and transmitting the preliminary information from the first wireless communication section. | 10-28-2010 |
20100330918 | INTERFERENCE MANAGEMENT - An apparatus for wireless communication is provided including a processing system. The processing system is configured to determine potential interference from communications with a first wireless node within a first coverage area through a first wireless interface, and to manage the potential interference when communicating with a neighboring apparatus within a second coverage area through a second wireless interface. The second coverage area is greater than the first coverage area and the neighboring apparatus is outside the first coverage area. | 12-30-2010 |
20110151795 | Apparatus And Method For Maintaining Communications With A Vehicle In The Presence Of Jamming - Jamming is detected as occurring to communications associated with at least one electronic device disposed at a vehicle. Responsive to detecting the jamming, an indication is transmitted from the vehicle to a base station informing the base station that jamming is occurring. Communications are subsequently conducted between the base station and the vehicle on at least one predetermined and prearranged communication channel. | 06-23-2011 |
20110201277 | RADIO COMMUNICATION SYSTEM, RADIO BASE STATION, AND RADIO COMMUNICATION METHOD - In a radio communication method, a radio base station detects, based on CQI information received from a radio terminal, any one of a plurality of subbands, the CQI value of which has been degraded as compared with a threshold value, as an interfered subband (Step S | 08-18-2011 |
20120129457 | MULTI-RADIO COEXISTENCE - A method of wireless communication includes monitoring coexistence issues among supported radios in a User Equipment (UE). The method includes configuring a UE with first and second filter configurations. The first filter configuration covers a first frequency band, for example a portion of the ISM band. The first filter configuration may be wider than the second filter configuration, which excludes a portion of the first frequency band that is adjacent to a proximate second frequency band, for example LTE Band 7 or LTE Band 40. The UE selects between the first and second filter configurations based on the frequency of a first UE event. If the UE event is in a frequency in the adjacent portion excluded by the second filter configuration, the UE arbitrates depending on event priority. The second filter configuration may be chosen to reduce or minimize arbitration. | 05-24-2012 |
20120289165 | APPARATUS AND METHOD FOR MULTI-SIGNAL INTERFERENCE-AVOIDING DATA TRANSMISSION - The present technology provides an apparatus and a method for transmitting data via two or more FM signals in an interference avoiding manner. The apparatus comprises at least two FM transmitters. Each FM transmitter is configured to transmit a FM signal on a particular FM channel characterized by a certain carrier frequency that includes data and optionally one or more corresponding alternative frequencies (AFs). The apparatus further includes at least two receivers for receiving incoming electromagnetic radiation (EMR). At least one of the receivers is configured to receive incoming EMR associated with at least one of the FM channels, and another is configured to receive incoming EMR at least at frequencies outside of the FM channels. The controller is configured to separately control activation and deactivation of the FM transmitters and determine the carrier frequencies and the one or more AFs based upon incoming EMR. | 11-15-2012 |
20130035041 | WIRELESS INTERFERENCE MITIGATION - Mitigating interference in a mobile wireless communication device by using an estimation of the performance impact of interfering signals generated by a wireless cellular transmitter and received by a co-located Bluetooth receiver. Bluetooth frequency channels are marked suitable or unsuitable for transmission based on the performance impact estimation and the state of the wireless cellular and Bluetooth connections. The estimation accounts for properties of the wireless cellular transmitter and Bluetooth receiver as well as operational characteristics of the wireless cellular and Bluetooth connections. | 02-07-2013 |
20130065533 | USING FREQUENCY BANDS CHARACTERIZED BY TYPE OF UNWANTED INTERFERENCE FOR COEXISTENCE AMONG MULTIPLE WIRELESS COMMUNICATION TECHNOLOGIES - Apparatus having corresponding methods and computer-readable media comprise: a first transceiver comprising a controller configured to select one of a plurality of frequency regions, and a transmitter configured to transmit, according to a first protocol, first wireless signals in the one of the plurality of the frequency regions selected by the controller, wherein each frequency region is characterized by a respective type of unwanted interference generated responsive to the transmitter transmitting the first wireless signals in the respective frequency region; an arbiter configured to select one or more frequency channels based on the one of the plurality of the frequency regions selected by the controller; and a second transceiver configured to transceive, according to a second protocol, second wireless signals only in the one or more frequency channels selected by the arbiter. | 03-14-2013 |
20130295851 | SIGNAL PROCESSING - Apparatus for and method of processing radio frequency signals, the method including: obtaining a signal indicative of a first frequency (e.g. by obtaining a sample of a transmitted signal), the first frequency being a frequency of the transmitted signal; and using the signal indicative of a first frequency, establishing a second frequency depending on the first frequency, the second frequency being a frequency to which to tune a filter for filtering a received signal. An antenna for receiving and/or transmitting a signal may be a co-site antenna with respect to at least one other antenna. | 11-07-2013 |
20140011457 | COMMUNICATION APPARATUS, AND METHOD AND PROGRAM FOR CONTROLLING THE SAME - A communication apparatus comprises a reception unit that receives a reception signal from a metal cable and extracts reception data; a transmission unit that sends a transmission signal obtained by modulating transmission data with a frequency included in a first frequency band to the metal cable; an interference signal detection unit that detects a signal used in wireless communication, modulated by a frequency included in a second frequency band, and transmitted over the metal cable as an interference signal; and a signal transmission control unit that instructs the transmission unit to modulate transmission data using a frequency included in a third frequency band that does not have any frequency band overlapping the second frequency band when the interference signal is detected and a frequency band overlapping both the first frequency band and the second frequency band exists. | 01-09-2014 |
20140073259 | SYSTEM AND METHOD FOR IDENTIFYING AND MANAGING OVERLAPPING SPECTRUM USE - A spectrum use assessment server receives spectrum use data from each of plural electronic devices. The spectrum use data from each electronic device includes at least location of the electronic device and operating channel of the electronic device. The server determines a spectrum use coverage area of each electronic device and identifies an overlap in the coverage areas in which two or more of the electronic devices engage in competing spectrum use. | 03-13-2014 |
20140323054 | COLLABORATIVE CHANNEL SOUNDING IN MULTI-ANTENNA SYSTEMS - The disclosed embodiments relate to a system that performs channel-sounding operations in a multi-antenna wireless communication system. During operation, the system first performs channel-sounding operations between a first client and a second client in a first frequency band. These channel-sounding operations involve transmitting a series of known tones between the first client and the second client and using signals received as a result of the transmissions to finds a strongest path between the first client and the second client. Next, the system uses the identified strongest path to improve channel-sounding operations in a second frequency band. | 10-30-2014 |
20150072623 | SYSTEMS AND METHODS FOR REDUCING TRANSMISSION INTERFERENCE - A method for reducing transmission interference is described. The method includes determining that an FM receiver is turned on. The method also includes determining that the FM receiver is tuned to an FM channel experiencing interference from an induction-based communication transmitter. The method further includes adjusting a transmit frequency of the induction-based communication transmitter by a temporary frequency shift. | 03-12-2015 |
20150079909 | DYNAMIC FREQUENCY PLAN - In one configuration, an apparatus and a method to operate the apparatus are provided. The apparatus includes at least one processor configured to receive operating information indicating a set of operating frequencies from a first circuit and to select an operating frequency from the set of operating frequencies. The at least one processor is further arranged to configure an operation of a second circuit based on the selected operating frequency. In another configuration, the apparatus includes at least one processor configured to select a set of operating frequencies based a radio frequency operation and to transmit operating information indicating the set of operating frequencies to a control circuit. | 03-19-2015 |
20150099471 | RECEIVER AND TRANSMITTER OF COPING WITH INTERFERENCE IN SUPER-REGENERATIVE COMMUNICATION SYSTEM, AND METHOD OF USING THE RECEIVER AND THE TRANSMITTER - A receiver and a transmitter that copes with interference in a super-regenerative communication system, and a method of using the receiver and the transmitter, are provided. A super-regenerative receiver includes a resonance frequency adjusting unit configured to adjust a resonance frequency associated with a filtering band of a transmission signal that is received from a transmitter. The super-regenerative receiver further includes an oscillation signal generating unit configured to generate an oscillation signal, using a positive feedback amplification, based on the resonance frequency and the transmission signal. The super-regenerative receiver further includes an oscillation characteristic detecting unit configured to detect a characteristic of the oscillation signal. The super-regenerative receiver further includes a determining unit configured to determine whether interference is included in the transmission signal based on the characteristic of the oscillation signal and the resonance frequency. | 04-09-2015 |
20150133057 | SYSTEM AND METHOD FOR CHANNEL SELECTION TO REDUCE IMPACT TO AN EXISTING NETWORK - Described herein are techniques for reducing interference to non-cellular communications on an unlicensed band by a network entity sending/receiving cellular communications on the unlicensed band. For example, the technique may involve accessing a list of channels for cellular communication on the unlicensed band, the list having the channels in an order of priority for reducing interference to non-cellular communication on the unlicensed band. The technique may involve determining an interference criteria for a received signal, the interference criteria being based at in part on at least one of a received signal strength indicator (RSSI) or a duty cycle of the received signal. The technique may involve going through, in the order of priority, each channel in the list to identify a first channel that satisfies the interference criteria. | 05-14-2015 |
20160094299 | Harmonic Suppression System - A harmonic suppression system, including an interface connector is connected to a common end of a first differential SPMT switch; a control port of the first differential SPMT switch is connected to a control port of a second differential SPMT switch, and a gating throw end of the first differential SPMT switch is separately connected to one end of each LC trap network in a one-to-one correspondence; the control port of the second differential SPMT switch is connected to a baseband chip, each gating throw end of the second differential SPMT switch is separately connected to the other end of each LC trap network in a one-to-one correspondence, and a common end of the second differential SPMT switch is connected to the baseband chip; the baseband chip is connected to an antenna switch; and the antenna switch is connected to a antenna. | 03-31-2016 |