Patent ID: 8437438
Filing Date: 2013-05-07
Classification: H04B

Abstract:
1. A diversity reception device, comprising: a first antenna serving as a reference antenna; a second antenna serving as an antenna-to-be-measured; a power combiner configured to combine electric powers of OFDM signals respectively, each of the OFDM signals being received by the first and second antennas; a digital terrestrial broadcast tuner connected to an output side of the power combiner; a switch configured to change connections between branched output-ports of the first and second antennas, in mid-stream of effective symbol periods, the effective symbol periods are assigned respectively in each of symbol periods of the OFDM signals; a receiver connected to an output side of the switch, configured to demodulate the OFDM signals; a phase shifter connected to an output side of the second antenna, configured to shift phases of the OFDM signals received by the second antenna, and to transfer the phase-shifted OFDM signals to the power combiner; and an arithmetic and control processing circuit, after accepting the demodulated OFDM signals, configured to calculate complex correlation coefficient between a guard interval, which is assigned in each of the symbol periods associated with the first antenna, and a copy-source interval, which is assigned in each of the symbol periods associated with the second antenna, and to determine rotation angle on a complex plane on the basis of the complex correlation coefficient, and to transfer phase-shift signal to the phase shifter so that the phase shifter can shift the phase by amount of the rotation angle.