| Patent application number | Description | Published |
|---|
| 20090022231 | COMMUNICATION APPARATUS - A communication apparatus associated with a system that uses two or more discontinuous frequency bands. The communication apparatus includes a BPF (band pass filter) including a plurality of BPFs associated with signals having respective frequency bands; a controller that controls each unit to transmit/receive the signals having the respective frequency bands; a down-converter that down-converts a filtered signal into a baseband signal while switching frequencies under control of the controller; a receiver that performs predetermined reception processing under control of the controller; and a transmitter that performs predetermined transmission processing under control of the controller, and common hardware is used in communication in all frequency bands with respect to processing of the baseband signal. | 01-22-2009 |
| 20090029710 | MULTI-BAND RADIO COMMUNICATION METHOD AND BASE STATION - In a radio communication system that simultaneously provides communication service using a plurality of discontinuous frequency bands, a multi-band radio communication method according to the present invention is a method in which a base station constituting the system allocates a band to a mobile station that requests a communication starting. For example, a specific receiving unit within the base station extracts control information concerning a channel state in each of the frequency bands, and recognizes a frequency band in which the mobile station can receive information, from a result of the extraction. A channel controller | 01-29-2009 |
| 20090125778 | COMMUNICATION SYSTEM, TRANSMISSION-SIDE COMMUNICATION DEVICE, AND RECEPTION-SIDE COMMUNICATION DEVICE - Within a communication system in which an ARQ control is exercised, in a transmission-side communication apparatus | 05-14-2009 |
| 20090196203 | WIRELESS COMMUNICATION SYSTEM AND COMMUNICATION CONTROL METHOD - The present invention relates to a wireless communication system that performs data communication using a spatial multiplex transmission scheme. A mobile station includes a transmission weight calculating unit that calculates a transmission weight and a beam information notifying signal generating unit that transmits a known signal for generating partial space information at a base station side. A base station includes a scheduling unit (DL spatial scheduling unit ( | 08-06-2009 |
| 20090196368 | Radio transmission control method, radio receiver apparatus, and radio transmitter apparatus - Conventionally, if the number of transmission antennas is greater than that of reception antennas, different signals simultaneously transmitted from the transmission antennas cannot be separated from one another at the receiving end, resulting in a significant degradation of received-signal quality. A transmitter and a receiver each have a plurality of antennas. The transmitter transmits a pilot signal. The receiver receives the pilot signal, calculates transmission-related information corresponding to the pilot signal, selects, based on this calculated information, a transmission signal to be used by the transmitter, and notifies the transmitter of the selected signal. The transmitter selects, from the informed transmission signal, transmission antennas and uses the selected antennas to transmit information signals, so that a signal separation can be easily performed at the receiving end. | 08-06-2009 |
| 20100016023 | RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD - A base station of a radio communication system emits a radio wave having the same frequency by time division toward a plurality of specific areas from a plurality of antenna elements by using a multiple-beam antenna to form a plurality of spot beams, and transmits broadcast information through a plurality of beacon channels. Upon reception of the broadcast information, a terminal that exists in any one of the plurality of specific areas selects an optimum beacon channel, and transmits a communication establishment request and a bandwidth request to the base station through a request channel corresponding to information for identifying the antenna element, which is included in the broadcast information received through the selected optimum beacon channel. Upon reception of the requests, the base station schedules, when a channel is to be allocated, a channel allocation time including downlink and uplink data bandwidths and the like. | 01-21-2010 |
| 20100150013 | CALIBRATION METHOD, COMMUNICATION SYSTEM, FREQUENCY CONTROL METHOD, AND COMMUNICATION DEVICE - A calibration method according to the present invention includes a step of first channel estimating for transmitting a pilot signal from a first antenna and receiving the pilot signal at a second antenna different from the first antenna to calculate a first channel estimation value; a step of second channel estimating for transmitting a plot signal from the second antenna and receiving the pilot signal at the first antenna to calculate a second channel estimation value; and a step of correction coefficient calculating for calculating, by using the first and second channel estimation values, a correction coefficient. | 06-17-2010 |
| 20100329385 | POWER SUPPLY APPARATUS AND POWER SUPPLY METHOD - When transmitting an RF signal for power supply or a pulse signal for data transmission, amplification is made in such a manner that the peak power of the RF signal becomes greater than the peak power of the pulse signal. Thus transmitting the RF signal with the greater peak power enables charging of a capacitor | 12-30-2010 |
