| 摘要 |
PURPOSE:To preferentially absorb the phase difference of a phase synchronizing device, without sacrificing the equalizing ability and absorbing the phase difference of carrier wave, by giving a leakage characteristic to a part of the full integrator storing the imaginary part of a variable complex tap. CONSTITUTION:An automatic equalizer 3000 is provided with delay circuits 1, 2 having a delay equal to a pulse generating period T, variable complex taps 3- 5, and an adder 6, and a sample value is supplied from a sampler 14. A transmission code is estimated at a discriminator 7 from the output of the automatic equalizer. A phase synchronizing circuit 2000 for synchronous detection is provided with a multiplication circuit 13 performing synchronous detection, a variable frequency oscillator 12 and an LPF11, and a phase difference is supplied to the LPF11 from a phase difference detecting circuit 4000. A complex tap C2 of a center tap 4 has real number taps 40-43, and real and imaginary parts of each reception signal are applied to signal lines 8000 and 9000, the complex signal after equalization is outputted to terminals 6000 and 7000 after being separated into the real and imaginary parts, and the leakage characteristic is given to a part of the full integrator storing the imaginary part. |
