| 摘要 |
PROBLEM TO BE SOLVED: To enable a phase rotation volume caused by a frequency offset to be accurately estimated even when a radio receiver moves at a high speed. SOLUTION: A reverse spreader 106 (107) enables base band signals to undergo reverse spreading processing based on the timing given by a searcher 105, by which the base band signals of path 1 (path 2) can be obtained. A complex correlator 115 (116) enables the base band signals (base band signals that have not been multiplied yet by the reverse characteristics of a channel estimate from a channel estimator 108) to undergo a complex correlation processing. A path synthesizer 117 synthesizes signals subjected to complex correlation processing by the complex correlators 115 and 116. A phase estimator 118 estimates a phase rotation volume caused by a frequency offset by means of the signals synthesized by path synthesizer 117. |
