The waveform equalizer, frequency offset compensating manner, program and record media, use the waveform equalizer mobile station wireless installation, base station wireless installation and the portable communication system

摘要

PROBLEM TO BE SOLVED: To provide a waveform equalizer whose equalization is enhanced.;SOLUTION: An equalization filter section 120 eliminates inter-code interference of a received signal, a code discriminator 109 forms a coordinate axis on the basis of an equalization signal y(k-1) resulting from delaying an equalization signal y(k) outputted from the equalization filter section 120 by one symbol an determines a signal point d(k) of a present symbol from a signal point object with a prescribed angle to the coordinate axis. Then an error calculation unit 112 generates a phase error signal (k) denoting a phase difference between the signal point d(k) of the present symbol and the equalization signal y(k) outputted from the equalization filter section 120, a phase error vector accumulator 114 accumulates the phase error vectors (k) to generate a phase error accumulated vector , and a complex multiplier 105 applies complex arithmetic operation to the phase error accumulation vector and an input signal 12 applied to the equalization filter section 120 to compensate a frequency offset included in the input signal 12.;COPYRIGHT: (C)2002,JPO