Abstract: A communication system includes sector units composing base stations, and mobile subscriber stations each being in sectors corresponding to the sector units. The mobile subscriber stations transmit channel estimation signals to the sector units corresponding to the sector and sector units corresponding to sectors contiguous to the sectors. A sector unit that corresponds to the sector forms, based on a channel estimation signal received from the mobile subscriber station in the sector corresponding to the sector unit and channel estimation signals received from the adjacent mobile subscriber stations in the sectors contiguous to the sector, a transmission beam that is directed to the mobile subscriber station but is not directed to the adjacent mobile subscriber stations to transmit data to the mobile subscriber station. By configuring the system in such a manner, interference from contiguous sectors can be avoided.

Abstract: A communication system includes sector units composing base stations, and mobile subscriber stations each being in sectors corresponding to the sector units. The mobile subscriber stations transmit channel estimation signals to the sector units corresponding to the sector and sector units corresponding to sectors contiguous to the sectors. A sector unit that corresponds to the sector forms, based on a channel estimation signal received from the mobile subscriber station in the sector corresponding to the sector unit and channel estimation signals received from the adjacent mobile subscriber stations in the sectors contiguous to the sector, a transmission beam that is directed to the mobile subscriber station but is not directed to the adjacent mobile subscriber stations to transmit data to the mobile subscriber station. By configuring the system in such a manner, interference from contiguous sectors can be avoided.

Abstract: A radio communication apparatus includes a received beam generating section 12 for generating received beams beam0 and beam1, which are perpendicular to each other and spatially separated, by assigning weights to received signals fed from receiving antennas 11 by using received beam weights; path search sections 13 and 14 each for outputting path information when the received beams beam0 or beam1 includes a spread signal spread by a known spreading code; a demodulating section 16 for outputting demodulation data by receiving the received beams beam0 and beam1 and by RAKE combining them in response to the path information; and a feedback control section 15 for outputting selection information 101 by selecting a transmission beam to be transmitted in response to the path information and the phase difference between the received beams beam0 and beam1 fed from the demodulating section 16.

Abstract: A radio communication apparatus includes a received beam generating section 12 for generating received beams beam0 and beam1, which are perpendicular to each other and spatially separated, by assigning weights to received signals fed from receiving antennas 11 by using received beam weights; path search sections 13 and 14 each for outputting path information when the received beams beam0 or beam1 includes a spread signal spread by a known spreading code; a demodulating section 16 for outputting demodulation data by receiving the received beams beam0 and beam1 and by RAKE combining them in response to the path information; and a feedback control section 15 for outputting selection information 101 by selecting a transmission beam to be transmitted in response to the path information and the phase difference between the received beams beam0 and beam1 fed from the demodulating section 16.

Abstract: A method and apparatus is provided for calculating possible values of a combination ratio for signals received via a plurality of antennas (A1 to An) according to different algorithms by means of a plurality of algorithm units (31 to 33), calculating an SIR value for each of a plurality of composite signals which are generated using the possible values, respectively (SIR calculation units (41 to 43)), determining which composite signal has the highest quality (determining unit (44)), and selecting the composite signal having the highest quality as a received signal (selecting unit (45)).

Abstract: A signal processor for a mobile communication system including a plurality of function blocks for signal processing directed to facilitating debugging. A signal processor 100 includes primary function blocks such as an error correction coder block 102, a modulator block 104, a demodulator block 202, an error correction decoder block 204, and an MPU 302. More particularly, the signal processor 100 outputs debug information in an arbitrary data length along with time information serially from an arbitrary function block, based on an instruction from an outside, through signal lines 404(1)˜404(I), 404(1)˜404(J), 404(1)˜404(K), 404(1)˜404(L) connected to each function block, a selection multiplex output block 403, and a selection multiplex output signal line 402. Hence, a debugger 401 specifies a function block where a failure occurs and specifies the timing of a failure occurrence.

Abstract: A method and apparatus is provided for calculating possible values of a combination ratio for signals received via a plurality of antennas (A1 to An) according to different algorithms by means of a plurality of algorithm units (31 to 33), calculating an SIR value for each of a plurality of composite signals which are generated using the possible values, respectively (SIR calculation units (41 to 43)), determining which composite signal has the highest quality (determining unit (44)), and selecting the composite signal having the highest quality as a received signal (selecting unit (45)).

Abstract: A receiver applied to a mobile communications system which allows reduction of circuit scale is provided. Each of a plurality of fingers has a phase estimator. The phase estimator determines a phase estimate based on demodulated signals restored via a despreading section. The phase estimate is given to a compensation coefficient operation section via and I/O section. The compensation coefficient operation section determines a weight/phase compensation coefficient used for realizing both weight control and phase compensation control based on the phase estimate. A finger has a phase compensator. The phase compensator multiplies the demodulated signal after delay compensation by the determined weight/phase compensation coefficient. As a result, weight control and phase compensation control can be simultaneously attained. In this way, circuit scale can be reduced compared with the case in which weight control and phase compensation control are made individually via separate circuits.

Abstract: In an apparatus and method for controlling an array antenna comprising a plurality of antenna elements arranged so as to be adjacent to each other in a predetermined arrangement configuration, a plurality of received signals received by the antenna elements is transformed into respective pairs of quadrature baseband signals, using a common local oscillation signal, wherein each pair of quadrature baseband signals is orthogonal to each other. Then predetermined first and second data are calculated based on each pair of transformed quadrature baseband signals, and are filtered using a noise suppressing filter. Respective elements of a transformation matrix for in-phase combining are calculated based on the filtered first and second data, and the received signals obtained from the each two antenna elements are put in phase based on the calculated transformation matrix. Thereafter, a plurality of received signals which are put in phase are combined in phase, and an in-phase combined received signal is outputted.