Patent ID: 8249195
Filing Date: 2012-08-21
Classification: H04B,H04L

Abstract:
1. A wireless communication apparatus, comprising: a plurality of antenna elements for receiving orthogonal modulation signals as wireless signals; a plurality of received signal conversion units for converting the wireless signals received by said antenna elements into baseband received signals; a memory for storing a group of coefficient values necessary in processing of received signals outputted from said received signal conversion units; a coefficient generation unit for temporarily storing specific received signals outputted from said received signal conversion units, detecting an offset value of reception timing of the specific received signals on the basis of a desired signal already known and the group of the coefficient values read out from said memory, compensating the group of coefficient values according to the detected offset value of the reception timing, and storing the compensated coefficient values in said memory; and a signal processing unit for processing the received signals outputted from said received signal conversion units by applying the compensated coefficient values stored in said memory, wherein said coefficient generation unit detects a phase shift value of said specific received signals, and identifies the offset value of the reception timing from the phase shift value; and wherein said coefficient generation unit changes a phase shift value which is variable depending on the offset value of the reception timing, by a predetermined unit value within a predetermined range, compensates said group of coefficient values stepwise in accordance with the phase shift value, compares said desired signal with a candidate signal obtained by applying the compensated coefficient value to the specific received signals, and identifies the reception timing offset value of said specific received signals from the phase shift value at which an error between the desired signal and the candidate signal has a minimum value.