Integrate and dump phase demodulator.

摘要

The present invention provides a demodulator for digital modulation signals. The demodulator for digital modulation signals comprises a frequency detection device, an integral discharge filter, a feedback device for noise-compensating signals, a discrimination device, and a generation device for noise-compensating signals. The frequency detection device outputs frequency detection signals by detecting frequencies of the digital modulation signals. The integral discharge filter outputs phase deviation signals by integrating the frequency detection signals for a given interval. The feedback means for noise-compensating signal outputs compensated phase deviation signals to the discrimination means by feeding back the noise-compensating signals from the generation means for noise-compensating signals to phase deviation signals from the integral discharge filter. The discrimination means outputs demodulation data by discriminating the deviation of the digital modulation signals based on the compensated phase deviation signals. The generation means for noise-compensating signals outputs the noise-compensating signals based on the compensated phase deviation signals and the demodulation data. Also another demodulator for digital modulation signals further comprising a compensation device for interference from preceding data in addition to the above construction. The compensation device for interference from preceding data outputs interference-compensated phase deviation signals by removing the interference from the preceding demodulation data from the compensated phase deviation signals. <IMAGE>