Bi-phase communication demodulation techniques

摘要

One aspect of the present invention includes a bi-phase communication receiver system. The system includes an analog-to-digital converter (ADC) configured to sample a bi-phase modulation signal to generate digital samples of the bi-phase modulation signal. The system also includes a bi-phase signal decoder configured to decode the bi-phase modulation signal based on the digital samples. The system further includes a preamble detector comprising a digital filter configured to evaluate the digital samples to generate an output and to detect a preamble of the bi-phase modulation signal for decoding the bi-phase modulation signal based on the output.

主权项

1. A bi-phase communication receiver system comprising:
an analog-to-digital converter (ADC) configured to sample a bi-phase modulation signal to generate digital samples of the bi-phase modulation signal; a bi-phase signal decoder configured to decode the bi-phase modulation signal based on the digital samples; and a preamble detector comprising a digital filter configured to evaluate the digital samples to generate an output and to detect a preamble of the bi-phase modulation signal for decoding the bi-phase modulation signal based on the output, wherein the digital filter is configured as a finite impulse response (FIR) filter comprising a set of tap weights comprising values associated with at least one period of the preamble of the bi-phase modulation signal and the set of tap weights are arranged in an alternating pattern of a plurality of first values of positive one and a respective plurality of second values of negative one, wherein each of the first and second values correspond to a respective one of the digital samples that are incrementally shifted into the FIR filter.