Diversity reception device, diversity reception method, reception program, and recording medium

摘要

The present invention calculates an echo profile on the basis of: a complex baseband signal generated in a front end (2#b) on the basis of a received signal transmitted by an antenna (1#b); and a transmission symbol estimated value (dfin) supplied by a trellis decoder (8). With the estimated transmission symbol (dfin) as a filter input, the echo profile is calculated on the basis of a filter coefficient of an adaptive filter having a received signal as the desired filter-output signal. On the basis of the calculated echo profile, a sampling-frequency control unit (10) controls the sampling frequency of the baseband signal in the front end (2#b). As a result, it is possible to perform a highly accurate timing-recovery control.

主权项

1. A diversity reception device that receives a signal that has been digitally modulated by single carrier modulation, comprising:
a plurality of branch processing units to each of which one of a plurality of received signals is individually inputted; a combination and equalization unit calculating an equalized signal from said plurality of received signals; a transmitted symbol estimation unit calculating an estimated transmitted symbol from said equalized signal; and a sampling frequency control unit, wherein each of said branch processing units comprises:
a front end unit converting said received signal to a baseband signal; anda channel estimation unit calculating an estimated channel characteristic on the basis of said baseband signal and said estimated transmitted symbol, wherein each of said channel estimation units comprises:
an adaptive filter taking said estimated transmitted symbol as filter input and generating a desired filter output signal from said received signal; andan echo profile calculation unit calculating an echo profile from filter coefficients of said adaptive filter, said combination and equalization unit calculates said equalized signal on the basis of said estimated channel characteristic, and said sampling frequency control unit controls sampling frequencies of said baseband signal in said front end units on the basis of said echo profiles.