Time segment based software defined radio system

摘要

A modulated signal is demodulated to obtain a modulation signal. The modulated signal is contained within an input signal. A periodic time segment sequence is defined having a plurality of ordered time segments. Signal values are acquired, from the input signal, during each ordered time segment. Signal values acquired during each ordered time segment are combined with signal values acquired during the same ordered time segment over multiple periods of the periodic time segment sequence. A local clock is generating. The modulated signal is demodulated by weighting the combined signal values by the local clock to obtain the modulation signal. the modulation signal is low-pass filtered to obtain a control signal. The generation of the local clock is controlled with the control signal.

主权项

1. A method for demodulating a modulated signal to obtain a modulation signal, the modulation signal contained within an input signal, the method comprising:
defining a periodic time segment sequence having a plurality of ordered time segments; acquiring signal values, from the input signal, during each ordered time segment; combining signal values acquired during each ordered time segment with signal values acquired during the same ordered time segment over multiple periods of the periodic time segment sequence; generating a local clock demodulating the modulated signal by weighting the combined signal values by the local clock to obtain the modulation signal low-pass filtering the modulation signal to obtain a control signal; and controlling the generation of the local clock with the control signal.