DIVERSITY RECEPTION APPARATUS, DIVERSITY RECEPTION METHOD, RECEPTION PROGRAM, AND RECORDING MEDIUM

摘要

An RSS calculation unit (12) calculates a received signal spectrum on the basis of a CBB signal sent from a frontend (2#b). A CFR estimation unit (13) calculates an estimated transmission path characteristic and a residual signal on the basis of the CBB signal and estimated transmitted symbols estimated by a trellis decoder (8). Further, an NPS estimation unit (14) calculates an estimated noise power spectrum on the basis of the residual signal calculated by the CFR estimation unit (13). A combination unit (4) combines a plurality of received signal spectrums on the basis of the received signal spectrum, estimated transmission path characteristic and estimated noise power spectrum calculated as described above. An equalization unit (5) performs equalization of the combination result, thereby calculating an equalized spectrum. As a result, a receiver of which the frequency selectivity noise resistance property is high can be achieved on a small calculation scale.

主权项

1. A diversity reception apparatus that receives a digitally modulated signal by single carrier modulation, comprising:
a plurality of branch processing parts to which a plurality of received signals are respectively inputted individually; a combining and equalizing part calculating an equalized signal from said plurality of received signals; and a transmitted symbol estimation part calculating an estimated transmitted symbol from said equalized signal; wherein each of said branch processing parts comprise:
a channel estimation part calculating an channel characteristic; anda noise estimation part calculating an estimated noise power spectrum; wherein: said combining and equalizing part calculates said equalized signal on the basis of said channel characteristic and said estimated noise power spectrum, said channel estimation part comprises an adaptive filter that takes said estimated transmitted symbol as filter input and generating a desired filter output signal from said received signal, and calculates said estimated channel characteristic from filter coefficients of said adaptive filter, and said noise estimation part calculates said estimated noise power spectrum on the basis of a residual signal calculated by said adaptive filter.