Patent application number | Description | Published |
20080198799 | Radio Communication System - In a wireless communication system using the contention method, collisions between transmission signals sent from terminals to a base station are avoided, and a communication area is flexibly formed while suppressing unnecessary radiation of the communication area. The base station includes antennas disposed such that wireless zones cover mutually different areas, wireless units connected to the antennas in one-to-one correspondence, and for, via the respective antennas, receiving wireless signals from the terminal stations in the wireless zones and transmitting wireless signals to the terminal stations in the wireless zones, a data processing unit for processing the wireless signals received by the plurality of wireless units and generate data to be transmitted to the terminal stations, and a communication control unit for controlling the wireless units so as to, during a slot other than a transmission request slot, form one communication area combining the wireless zones of all of the antennas, and during the transmission request slot, form mutually independent communication areas less than or equal in number to the antennas. | 08-21-2008 |
20080198835 | Wireless Transmission System And Wireless Transmission Method And Wireless Station For Use Therein - The present invention provides a wireless station capable of increasing the probability that a path diversity effect can be obtained in a case where a plurality of wireless stations transmit packets using a modulation/demodulation scheme with an anti-multipath property. A delay amount determining section ( | 08-21-2008 |
20090034647 | TRANSMITTING DEVICE, WIRELESS COMMUNICATION SYSTEM AND TRANSMITTING METHOD - At a time T | 02-05-2009 |
20090036052 | WIRELESS STATION, WIRELESS TRANSMISSION METHOD FOR THE WIRELESS STATION, AND WIRELESS TRANSMISSION SYSTEM USING THE WIRELESS STATION - A wireless station according to the present invention is a wireless station used as one of a plurality of relay stations forming transmission paths, respectively, different from each other, in a wireless transmission system for transmitting a packet from a transmitting station to a receiving station through the plurality of relay stations, and the wireless station comprises: a reception section for receiving a packet transmitted from the transmitting station, and receiving a packet which is transmitted, based on the packet transmitted from the transmitting station, from a relay station other than the one of the plurality of relay stations, and is transmitted before the one of the plurality of relay stations performs transmission, by using a transmission parameter for obtaining a path diversity effect in the wireless transmission system; a transmission parameter estimation section for estimating the transmission parameter used by the relay station other than the one of the plurality of relay stations, based on the packet received by the reception section from the relay station other than the one of the plurality of relay stations; a transmission parameter selection section for selecting the transmission parameter other than the transmission parameter which is used by the relay station other than the one of the plurality of relay stations, and is estimated by the transmission parameter estimation section; and a transmission section for transmitting, to the receiving station, the packet received by the reception section from the transmitting station, by using the transmission parameter selected by the transmission parameter selection section. | 02-05-2009 |
20090097584 | WIRELESS TRANSMISSION SYSTEM, WIRELESS TRANSMISSION METHOD, AND WIRELESS STATION AND TRANSMITTING STATION USED THEREIN - The present invention provides a wireless transmission system capable of exerting a maximum path diversity effect by using combinations formed by a plurality of symbol waveforms even when a maximum number of effective branches is limited to a small number. A transmission timing controlling section ( | 04-16-2009 |
20090135972 | INTERFERING SIGNAL CHARACTERIZING QUANTITY STORING METHOD AND DEVICE, INTERFERING SIGNAL CHARACTERIZING QUANTITY ACQUIRING METHOD AND DEVICE, AND INTERFERING SIGNAL SUPPRESSING METHOD AND DEVICE - An object is to identify interfering signals coming at random timings from different radio stations. In order to attain this object, a method for storing the characterizing quantity of an interfering signal included in a received signal comprises a characterizing quantity calculation step of calculating the characterizing quantity of the received signal; a received signal determination step of determining a probability that a desired signal is included in the received signal, and determining that the received signal is an interfering signal when determining that there is no probability that the desired signal is included in the received signal; and an interfering signal characterizing quantity storage step of storing the characterizing quantity of the received signal as an interfering signal characterizing quantity when it is determined at the received signal determination step that there is no probability that the desired signal is included in the received signal. | 05-28-2009 |
20090147893 | INTERFERENCE SUPPRESSION METHOD AND INTERFERENCE SUPPRESSION DEVICE - A reception station | 06-11-2009 |
20090175299 | SIGNAL DETECTION DEVICE AND SIGNAL DETECTION METHOD - A correlation unit ( | 07-09-2009 |
20090296591 | WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD - When communicating with a second wireless station, a first wireless station judges, based on link-related information received form the second wireless station and link-related information extracted from a signal transmitted by a fourth wireless station, whether a transmission link from the third wireless station to the fourth wireless station and a transmission link from the first wireless station to the second wireless station can be concurrently established without interference with each other. If judging affirmatively, the first wireless station transmits a signal to the second wireless station in synchronization with a signal transmitted by the third wireless station to the fourth wireless station. Preferably, when the first wireless station having a concurrent transmission control function communicates with the second wireless station having a interference reduction function, the first wireless station controls the interference reduction function of the second wireless station based on the link-related information received from the second wireless station and interference information, such that the transmission link from the third wireless station to the fourth wireless station and the transmission link from the first wireless station to the second wireless station can be established at the same time without interference with each other. If judging that the concurrent transmission is available, the first wireless station transmits a signal to the second wireless station according to a timing that overlaps transmission of a signal from the third wireless station to the fourth wireless station. | 12-03-2009 |
20100008346 | SIGNAL JUDGMENT APPARATUS AND SIGNAL JUDGMENT METHOD - An FFT unit ( | 01-14-2010 |
20100128826 | RECEIVING DEVICE AND RECEIVING METHOD - An AGC unit | 05-27-2010 |
20100197262 | RECEPTION DEVICE AND RECEPTION METHOD - The noise amount information storage unit | 08-05-2010 |
20100239039 | WIRELESS TRANSMISSION SYSTEM, AND WIRELESS STATION AND METHOD USED FOR SAME - A wireless transmission system capable of performing multi-station simultaneous transmission of data by wireless is provided. The wireless transmission system includes a plurality of wireless stations for transmitting and receiving data. Transmitter-side wireless stations, a multipath channel, and receiver-side wireless stations constitute a system for path diversity. At least one wireless station among the wireless stations determines, depending on a response packet with respective to a multi-station simultaneous transmission request packet transmitted by itself or other stations, a plurality of delay amounts from a reference timing during multi-station simultaneous transmission in the wireless transmission system, and a plurality of symbol waveforms that are a basis for a modulated waveform. A difference between each delay amount is set to be larger than or equal to a predetermined delay resolution for each symbol waveform, and a difference between maximum and minimum values of the delay amounts is set to be smaller than or equal to a predetermined maximum delay. | 09-23-2010 |
20110025424 | PLL/FLL CIRCUIT WITH GAIN CONTROL - An FLL circuit having a capability of configuring a desired loop bandwidth in a short period of time is provided. An FDC | 02-03-2011 |
20120020257 | WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD - When communicating with a second wireless station, a first wireless station judges, based on link-related information received from the second wireless station and link-related information extracted from a signal transmitted by a fourth wireless station, whether a transmission link from the third wireless station to the fourth wireless station and a transmission link from the first wireless station to the second wireless station can be concurrently established without interference with each other. If judging affirmatively, the first wireless station transmits a signal to the second wireless station in synchronization with a signal transmitted by the third wireless station to the fourth wireless station. | 01-26-2012 |