| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a receiver capable of performing highly accurate phase tracking and obtaining high reception characteristics in the receiver for receiving modulation waves for which plural sub-carriers are multiplexed. SOLUTION: The k lines of sub-carrier components from an FFT(fast Fourier transformation) circuit 101 are outputted to a sub-carrier demodulation circuit 102 and the sub-carrier demodulation circuit 102 demodulates the k lines of the sub-carrier components and outputs transmitted information bits to an output terminal 104. Further, the sub-carrier demodulation circuit 102 outputs distortion correction coefficients C(1)-C(k) used at the time of demodulating each of the sub-carriers, each of the distortion corrected sub-carrier components S(1)-S(k) and judgment signal points R(1)-R(k) to each of the sub-carriers to a phase estimation circuit 103. The phase estimation circuit 103 inputs C(1)-C(k), R(1)-R(k) and S(1)-S(k) and outputs phase error signals to the output terminal 105. The phase error signals outputted to the output terminal 105 are integrated in a loop filter or the like and fed back to a local transmitter and thus, phase tracking is performed.</p> |
