Patent ID: 6597728
Filing Date: 2003-07-22
Classification: H04L

Abstract:
A frequency correction device for correcting the frequency of a local oscillator of a radio reception device according to pilot synchronous detection, comprising:a pilot symbol detection means for detecting and extracting pilot symbols from a received radio signal after despreading; an inter-symbol phase shift detection means for detecting an inter-symbol phase shift between adjacent pilot symbols in a pilot symbol block; an inter-pilot block phase shift detection means for detecting a plurality of inter-pilot block phase shifts between adjacent pilot symbol blocks; a frequency correction determination means for determining a frequency correction based on an inter-pilot block phase shift of said plurality of inter-pilot block phase shifts which is closest to said inter-symbol phase shift; and a frequency correction means for executing frequency correction to the local oscillator based on the frequency correction which has been determined by the frequency correction determination means.