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

摘要

A CFR estimation unit (13) estimates channel frequency characteristic on the basis of a complex baseband (CBB) signal provided by a front end (2#b) via a data distribution unit (11), and a transmission symbol estimated value (dfin) provided by a trellis decoder (8). On the basis of the channel frequency characteristics estimated in this manner, a carrier frequency control unit (15) performs a carrier recovery control in order to become the carrier frequency error to 0 in the front end (2#b), by performing an Auto Frequency Control (AFC) based on changes in the channel phase in the full band of the frequency. As a result, it is possible to perform carrier synchronization appropriate for mobile receiving, and to improve receiving performance, even in the case of a digitally modulated signal having a DC pilot component by a single carrier.

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; and a transmitted symbol estimation unit calculating an estimated transmitted symbol from said equalized signal; wherein each of said branch processing units comprises:
a front end unit performing processes including modulation frequency conversion upon said received signal that has been inputted thereto, thus converting it to a baseband signal;a channel frequency characteristic estimation unit calculating an estimated channel frequency characteristic on the basis of said baseband signal and said estimated transmitted symbol; anda carrier frequency control unit controlling the conversion frequency for said modulation frequency conversion on the basis of said estimated channel frequency characteristic.