Patent application number | Description | Published |
20100317310 | DIRECTIVITY CONTROL SYSTEM, CONTROL DEVICE, COOPERATIVE STATION DEVICE, RECEPTION STATION DEVICE, AND METHOD OF CONTROLLING DIRECTIVITY - A directivity control system includes a first reception station device which receives an interference signal and a desired signal; a cooperative station device disposed at a different place from the first reception station device, which receives a signal using an antenna; and a control device which controls the directivity of an antenna of the first reception station device, wherein the control device regards a combination of the antenna of the first reception station device and the antenna of the cooperative station device as one array antenna, and calculates a sum, using a weight, of a received signal received using the antenna of the first reception station device and a received signal received using the antenna of the cooperative station device to compose a directivity pattern having a null in an arrival direction of the interference signal in the array antenna. | 12-16-2010 |
20110107171 | RECEPTION METHOD AND RECEPTION DEVICE - In a multicarrier wireless communication system adopting forward error correction codes, a reception method adapted to a receiver | 05-05-2011 |
20110129047 | RECEPTION DEVICE AND RECEPTION METHOD - It is possible to reduce the effect of an interference signal while suppressing increases in a circuit scale and a processing time. A reception device receives a multicarrier signal and an interference signal via a radio transmission path, detects a frequency position of the interference signal, performs filtering to suppress the multicarrier signal and the interference signal at the detected frequency position of the interference signal, removes a guard interval from the multicarrier signal suppressed by the filtering, demodulates each subcarrier of the multicarrier signal from which the guard interval is removed, and performs error correction on the demodulated signal. | 06-02-2011 |
20110211646 | CONTROL STATION DEVICE, TRANSMITTING STATION DEVICE, COMMUNICATION METHOD, AND COMMUNICATION SYSTEM - In a communication system configured by a transmitting station device and a receiving station device for transmitting and receiving a multicarrier signal using a spectrum including a plurality of subcarriers, a superposed rate which is a rate in which a superposed band in which interference is occurring is used in a used frequency band used for transmitting the multicarrier signal is set so as to increase frequency utilization efficiency of the used frequency band, and the multicarrier signal is transmitted using a spectrum allocated in accordance with the set superposed rate. | 09-01-2011 |
20110243268 | WIRELESS COMMUNICATION SYSTEM AND WIRELESS COMMUNICATION METHOD - In a wireless communication system including a transmitter device and a receiver device used for transmission of wireless signals having a plurality of sub-carriers, the transmitter device performs error correction coding on transmitting data and selects at least one of the plurality of sub-carriers used for transmission of error-correction coded data as a null sub-carrier having zero amplitude, thus transmitting the error-correction coded data, whilst the receiver device receives signals having the plurality of sub-carriers from the transmitter device so as to retrieve original transmitted data by implementing error correction decoding on received signals, thus determining whether an interference wave occurs in the sub-carrier upon detecting reception power exceeding a predetermined threshold in the sub-carrier serving as the null sub-carrier. | 10-06-2011 |
20110249569 | COMMUNICATION SYSTEM, TRANSMITTING DEVICE, RECEIVING DEVICE, TRANSMISSION METHOD, AND COMMUNICATION METHOD - A communication system which superposes and transfers a wireless multicarrier signal including a plurality of subcarriers is provided with: a transmitting device which performs allocation of predetermined data generated based on transmission data to both a non-superposed band which is a frequency band in which no interference signal is present and a superposed band which is a frequency band in which the interference signal is present, or to the non-superposed band while giving a higher priority to the non-superposed band, and generates and transmits the multicarrier signal based on the allocation; and a receiving device which receives the multicarrier signal transmitted from the transmitting device. | 10-13-2011 |
20120201193 | ACCESS CONTROL SYSTEM, ACCESS CONTROL METHOD, RELAY STATION APPARATUS, TERMINAL STATION APPARATUS, TRANSMITTING SIDE PROCESSING METHOD, RECEIVING SIDE PROCESSING SYSTEM, AND RECEIVING SIDE PROCESSING METHOD - Provided is a wireless relay system that improves system throughput between terminal stations and flexibly makes system throughput variable with respect to short-term traffic fluctuations. In the wireless relay system, a plurality of relay stations relay communication between two terminal stations that perform random access. The terminal stations and the relay stations include a slot synchronization unit, a time synchronization unit, and a transmission unit. The slot synchronization unit synchronizes slot timing of a time slot indicating a unit time. The time synchronization unit performs time synchronization for synchronization of the slot timing. The transmission unit transmits a transmission packet to a wireless line in synchronization with the slot timing. A transmission right is allocated for at least one time slot to each of a plurality of groups which are configured so that a group of a terminal station or a relay station and a group of an adjacent terminal station or an adjacent relay station are different from each other. The transmission unit transmits the transmission packet to the wireless line only in a time slot in which the transmission right is allocated to the group to which the terminal station or the relay station belongs. | 08-09-2012 |
20120239997 | WIRELESS COMMUNICATION SYSTEM, WIRELESS RELAY STATION APPARATUS, WIRELESS TERMINAL STATION APPARATUS, AND WIRELESS COMMUNICATION METHOD - Provided is a wireless communication system employing network coding which can set transmission quality for each destination of packets and improve throughput. The wireless communication system is provided with a wireless relay station apparatus and wireless terminal station apparatuses. The wireless relay station apparatus selects coding rates to be used for a first packet and a second packet in accordance with communication quality required for the first packet and the second packet, generates error correction encoded packets having the same data length from the first packet and the second packet using the selected coding rates, performs network encoding on the error correction encoded first and second packets to generate a network encoded packet, and transmits the generated network encoded packet. The wireless terminal station apparatus performs error correction encoding on a third packet equal to one of the first and second packets, performs network decoding on a received network encoded packet using the error correction encoded third packet to generate a decoded packet, and performs error correction decoding. | 09-20-2012 |
20130308591 | WIRELESS COMMUNICATION SYSTEM, TRANSMITTING DEVICE, RECEIVING DEVICE, AND WIRELESS COMMUNICATION METHOD - The receiving device of the present invention is provided with a means that receives, as a received signal, a signal that has been transmitted a transmitting device by dividing by N the spectrum of a signal to be transmitted and performing spectrum editing to reduce its occupied bands; a means that generates a first decoded signal by error-correcting and decoding this received signal in the bandwidth of the signal to be transmitted; a means that generates a transmission replica signal from this first decoded signal and divides by N the spectrum of this transmission replica signal to generate N sub-replicas; a means that generates a compensated received signal by restoring the spectrum of the signal to be transmitted from the transmitting device using the N sub-replicas and the received signal; and a means that decodes this compensated received signal to generate a second decoded signal. | 11-21-2013 |