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 |
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 |
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 |
20090207929 | COMMUNICATION METHOD, AND TRANSMITTING APPARATUS AND RECEIVING APPARATUS USING THAT COMMUNICATION METHOD - A transmission method for transmitting an orthogonal frequency division multiplexing signal. The method includes composing a plurality of carrier groups each including one or more subcarriers and assigning transmission data for a plurality of transmission destination terminals, to the plurality of carrier groups, on a basis of one carrier group for one transmission destination terminal basis. The method further includes selecting, for each of the carrier groups, one of a first frame configuration where the transmission data is transmitted using one modulated signal, and a second frame configuration where the transmission data is transmitted using a plurality of modulated signals and transmitting the assigned transmission data of the plurality of transmission destination terminals at a same time on a time axis. | 08-20-2009 |
20100040160 | COMMUNICATION MEETHOD, AND TRANSMITTING APPARATUS AND RECEIVING APPARATUS USING THAT COMMUNICATION METHOD - A method for generating a transmission signal to transmit an orthogonal frequency division multiplexing signal, from one antenna or from a plurality of antennas, to a plurality of terminals. Transmission data for the plurality of terminals is assigned to a plurality of carrier groups, each carrier group including a plurality of carriers. For each of the plurality of carrier groups, one of a first frame configuration is selected, wherein one modulated signal is transmitted, and a second frame configuration is selected wherein a plurality of modulated signals are transmitted by using the plurality of antennas. A transmission signal is generated using the selected frame configuration, for transmitting the transmission data assigned to the plurality of carrier groups during a certain period. | 02-18-2010 |
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 |
20100120379 | MIMO COMMUNICATION DEVICE - Provided is a MIMO communication device which can maintain the MIMO communication characteristic at a certain level regardless of the device installation position. The MIMO communication device ( | 05-13-2010 |
20100159842 | WIRELESS DISTANCE MEASUREMENT SYSTEM AND WIRELESS DISTANCE MEASUREMENT METHOD - A wireless distance measurement system and a wireless distance measurement method that measure the distance between a base station and a terminal without clock synchronization between a plurality of base stations, and without requiring input of the position relationships between a plurality of base stations. Clock phase shift section ( | 06-24-2010 |
20100167758 | RADIO POSITIONING SYSTEM AND COORDINATE CONFIGURING METHOD - A radio positioning system includes a plurality of base stations and a radio terminal. Each of the base stations includes a reference signal generating portion which generates a reference signal for positioning, a transmission portion which transmits the reference signal, a reception portion which receives a signal from its outside, a positioning portion which calculates a position relative to the radio terminal or base station as a signal sender based on the received signal, and a reference signal return portion which receives a reference signal transmitted from another base station and returns the reference signal to the another base station. The radio terminal includes a terminal reception portion which receives the reference signal, and a terminal transmission portion which returns the received reference signal. A reference signal transmitted by a first base station of the base stations is received and returned by the reference signal return portion in a second base station, the returned reference signal is received by the reception portion in the first base station, and the positioning portion in the first base station measures a position relative to the second base station based on the received reference signal. | 07-01-2010 |
20100183063 | Wireless Distance Measurement System and Wireless Terminal - A wireless distance measurement system and wireless terminal improve the accuracy of distance measurement when the UWB communication scheme is used. In wireless terminal | 07-22-2010 |
20100284481 | COMMUNICATION METHOD, AND TRANSMITTING APPARATUS AND RECEIVING APPARATUS USING THAT COMMUNICATION METHOD - A method for use in a communication apparatus that receives an orthogonal frequency division multiplexing (OFDM) signal transmitted from a base station. The OFDM signal includes a plurality of carrier groups each comprising a plurality of carriers, the plurality of carrier groups being assigned transmission data for a plurality of communication apparatuses. Each of the plurality of carrier groups adopt one of a first frame configuration, where the transmission data is transmitted using one modulation signal, and a second frame configuration, where the transmission data is transmitted using a plurality of modulated signals. The method includes specifying a carrier group to which transmission data for the communication apparatus is assigned, based on control information included in the received OFDM signal and generating reception data associated with the specified carrier group based on one of the one modulated signal used in the first frame configuration and the plurality of modulated signals used in the second frame configuration. | 11-11-2010 |
20110110355 | COMMUNICATION METHOD, AND TRANSMITTING APPARATUS AND RECEIVING APPARATUS USING THAT COMMUNICATION METHOD - A method for generating a transmission signal to transmit a modulated signal generated using orthogonal frequency division multiplexing, from a transmitting apparatus with a plurality of antennas, toward a plurality of terminals. The method includes assigning transmission data for the plurality of terminals to a plurality of carrier groups, each carrier group including a plurality of carriers and selecting, from the plurality of antennas, an antenna to be used for transmission toward each of the plurality of terminals. As a transmission mode for each of the plurality of carrier groups, a selection is made of one of a first transmission mode, in which one modulated signal is transmitted, and a second transmission mode in which a plurality of modulated signals are transmitted by using the selected antennas. A transmission signal is generated for transmitting the transmission data assigned to the plurality of carrier groups during an identical time period, using the selected transmission mode. | 05-12-2011 |
20110116388 | COMMUNICATION METHOD, AND TRANSMITTING APPARATUS AND RECEIVING APPARATUS USING THAT COMMUNICATION METHOD - A method for communicating in a communication apparatus includes receiving an orthogonal frequency division multiplexing (OFDM) signal transmitted from a base station, the OFDM signal including a plurality of carrier groups, each carrier group including a plurality of carriers. The plurality of carrier groups are assigned transmission data for a plurality of communication apparatuses, and each of the plurality of carrier groups adopts one of a first transmission mode in which the transmission data is transmitted using one modulated signal and a second transmission mode in which the transmission data is transmitted using a plurality of modulated signals. A carrier group, to which transmission data for the communication apparatus is assigned, is specified based on control information included in the received OFDM signal. Reception data associated with the specified carrier group is generated by decoding the one modulated signal used in the first transmission mode, when the first transmission mode is adopted for the specified carrier group, and reception data associated with the specified carrier group is generated by decoding the plurality of modulated signals used in the second transmission mode when the second transmission mode, is adopted for the specified carrier group. | 05-19-2011 |
20110133988 | RADIO ARRIVAL DIRECTION ESTIMATION DEVICE AND RADIO ARRIVAL DIRECTION ESTIMATION METHOD - A radio arrival direction estimation device that accurately estimates the arrival direction of radio waves from a desired tag, even when there are multiple antennas disposed at short intervals. When ID detection timing is provided from a timing detector ( | 06-09-2011 |
20110140970 | BASE STATION DEVICE AND DISTANCE MEASURING METHOD - Provided are a distance measuring device and a distance measuring method which can easily distinguish a reflected signal from a desired tag from an unnecessary wave so as to improve the distance measuring accuracy even when IR-UWB is used for measuring a distance. The method uses a reader ID indicated by a code string formed by P bits (P is a natural number) for identifying a base station and a tag ID indicated by a code string formed by Q bits (Q is a natural number) for identifying a radio terminal. The method generates a unique word containing P pulses, each of which is ON/OFF-modulated depending on whether each of P bits indicating the reader ID is 1 or 0. The method generates a frame containing 2 M unique words and a burst containing Q frames. The method further outputs a transmission signal containing a plurality of bursts. A radio terminal ASK-modulates the transmission signal depending on whether each of the Q bits indicating the tag ID is 1 or 0. The ASK-modulated signal is sampling-received at timings of different phases by 1/M (M is an integer not smaller than 1) of the transmission clock cycle. | 06-16-2011 |
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 |
20120014412 | POSITIONING SYSTEM AND POSITIONING METHOD - A positioning system and a positioning method which suppress the occurrence of jitter to improve positioning accuracy. A base station ( | 01-19-2012 |
20120032850 | ARRAY SIGNAL PROCESSING DEVICE - Provided is an array signal processing device capable of, when a spatial averaging method is applied to array signal processing, reducing the number of antennas constituting an array antenna while making use of the spatial averaging method. In the array signal processing device ( | 02-09-2012 |
20120044974 | RADIO TERMINAL DEVICE, RADIO BASE STATION DEVICE, RADIO RANGING SYSTEM, AND RADIO RANGING METHOD - Disclosed are a radio terminal device and the like, which achieve an improvement in the accuracy of ranging between a UWB reader and a UWB tag regardless of whether an active method or a semi-passive method. In a terminal ( | 02-23-2012 |
20120182985 | COMMUNICATION METHOD, AND TRANSMITTING APPARATUS AND RECEIVING APPARATUS USING THAT COMMUNICATION METHOD - A transmission apparatus includes a plurality of antennas and a frame configurator that selects, in a first unit time either a first transmitting method which transmits a modulated signal from at least one of the plurality of antennas, or a second transmitting method which transmits a plurality of modulated signals from the plurality of antennas, for a first carrier group arranged for a first terminal and either the first transmitting method or the second transmitting method for a second carrier group arranged for a second terminal. The frame configurator selects, in a second unit time either the first transmitting method or the second transmitting method for the first carrier group arranged for a third terminal and either the first transmitting method or the second transmitting method for the second carrier group arranged for a fourth terminal, wherein each of carrier groups includes one or more sub-carriers. | 07-19-2012 |
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 |
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 |
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 |
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 |
20130155989 | TRANSMISSION METHOD - A transmission method includes generating a plurality of orthogonal frequency division multiplexing (OFDM) signals, each signal including different data and some of the plurality of OFDM signals including pilot symbols. The pilot symbols are assigned to a predetermined subcarrier in predetermined time. At least one of the plurality of OFDM signals is assigned the pilot symbols to the predetermined subcarrier in the predetermined time, and other OFDM signals are assigned data to the predetermined subcarrier in the predetermined time. The method further includes converting each of the plurality of OFDM signals to a radio signal and transmitting each of the radio signals from a different antenna. | 06-20-2013 |
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 |
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 |
20150013905 | WET PROCESSING APPARATUS AND PLATING APPARATUS - A wet processing apparatus, such as a plating apparatus, and an etching apparatus, is disclosed. A wet processing apparatus includes a substrate-holder advancing mechanism configured to elevate a movable support to raise a substrate holder until the substrate holder is separated from a fixed support, move the movable support together with the substrate holder by a predetermined distance toward a holder takeout position, lower the movable support until the substrate holder is supported on the fixed support and the movable support is separated from the substrate holder, and move the movable support by the predetermined distance toward a holder put-in position. | 01-15-2015 |