The invention discloses a simultaneous frame and bit combined
estimation method for an EBPSK (extended binary
phase shift keying) communication
system. The method comprises the steps: framing sending data at a transmitting end, and then performing EBPSK modulation; sending a receiving
signal into an
impact filter at a receiving end, and converting the receiving
signal into parasitic
amplitude modulation impact at a code element '1'; performing down sampling on output data of the
impact filter according to a relative relation with a
baseband code element rate; calculating peak values of 13
continuous data points of each group in a
data stream subjected to down sampling, marking the moment that the peak values are greater than a certain threshold value, calculating a relevance value to a frame header, and marking the moment, in which four times of the
peak value is smaller than the relevance value, in the marked moments; searching the first
peak value of the relevance value in the marked moment in the step, wherein the moment corresponding to the first
peak value is a synchronous moment. According to the simultaneous frame and bit combined
estimation method, frame and bit are simultaneously finished by one step, so that the synchronization efficiency is improved, the synchronization precision is improved, the
demodulation performance is high, the synchronization expense is reduced, the transmission efficiency is high, the hardware expenses are reduced, and the receiving
machine implementation cost is reduced.