Patent ID: 8233519
Filing Date: 2012-07-31
Classification: H04B,H04L

Abstract:
1. A signal processing unit adapted for use in a wireless communication device, comprising: a carrier data generating unit configured to correct a frequency according to a frequency deviation amount to be received as an input and to generate carrier data; a carrier demodulating unit configured to demodulate a carrier of a received signal based on the carrier data and outputting carrier demodulated data; a matched filter unit configured to calculate, for the carrier demodulated data, a plurality of division correlation values by dividing said carrier demodulated data and by further performing a despread processing and an accumulating operation processing as a partial correlation processing and to perform a full addition processing on the plurality of division correlation, to thereby output correlation detected data while outputting the plurality of division correlation values as a partial correlation detected value due to detection of a correlation peak; a correlation peak detecting unit configured to detect a correlation peak from the correlation detected data and to output position information of the correlation peak; a coarse frequency deviation detecting unit configured to perform a FFT (Fast Fourier Transform) operation on the carrier demodulated data and to detect a frequency component according to a carrier frequency deviation amount thereby outputting the frequency deviation amount to the carrier data generating unit; a fine frequency deviation detecting unit configured to perform the FFT operation on the partial correlation value to thereby output a fine frequency deviation amount for reducing the frequency deviation amount, to the carrier data generating unit; and a control unit configured to receive the position information of the correlation peak as an input and to adjust a processing clock as an operation timing in the correlation peak detecting unit and the coarse frequency deviation detecting unit.