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CARRIER FREQUENCY ESTIMATION DEVICE FOR PSK SIGNAL
CARRIER FREQUENCY ESTIMATION DEVICE FOR PSK SIGNAL
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机译:PSK信号的载波频率估计装置
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摘要
PROBLEM TO BE SOLVED: To obtain a carrier frequency correctly. ;SOLUTION: An intermediate frequency digital QPSK signal is given to a conversion section 21, in which the signal is converted into a complex base band signal based on a base frequency ω of the QPSK signal, the base band signal is biquadrated at a calculation section 24, the result of biquadration is given to a FFT circuit 25, a frequency at which a peak is obtained in the FFT result is divided into 1/4 at a frequency divider 26, the obtained error frequency Δω and the frequency ω are added to obtain a carrier frequency of an input signal.;COPYRIGHT: (C)1997,JPO
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