| 摘要 |
<p>The present invention offers a delay detection circuit of which error rate is very low as well as enabling high-speed, stable and accurate phase compensation. This delay detection circuit receives a digital-phase-modulated signal including an already-known preset symbol string and an unknown data symbol string following the already-known string, and detects a phase difference between an instantaneous phase of an reception signal and an instantaneous phase after a preset symbol time from the time of the reception signal received using a phase difference detector. Then, the delay detection circuit comprises to calculate a compensation phase difference necessary to demodulate the reception signal from the phase difference, the phase difference of demodulation symbol estimated from the already-known symbol string and the phase difference of demodulation symbol estimated from the data symbol string, and demodulate the reception signal based on the compensation phase difference. <IMAGE></p> |
