科研之友
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摘要
The function of tracking, telemetry, and control transponder on mini-satellite is to receive, demodulate and transmit pseudo-code range measurement signal back to ground station. Small volume, light weight and low power of mini-satellite cause poor power for the transponder and small gain for the antenna. The pseudo-code range measurement signal usually is contaminated by strong noise and the poor SNR deteriorates the performance of immediate synchronous signal extraction, demodulation and detection. Conventional filter based on power spectrum bandwidth can only promote SNR to some extension. This paper provides a wave fitting polynomial filter which is based on least square solution criteria can increase significant SNR and extracts weak pseudo-code signal from strong noise and interference.
- 出版日期2006
- 单位浙江大学
