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A New View on Processing Gain of DSSS Systems under CW Interference

Li, Zhiqiang, Zhang, Bei-jiang

Abstract

Differing from the general analysis,the process of continuous wave(CW) interference being despreaded in a direct sequence spread spectrum(DSSS) system is reanalyzed. It is proved that the result sequence of continuous wave interference being despreaded varies according to sinusoid in time.Its frequency and amplitude are derived.The processing gain is discussed under 3 cases in comparison with traditional analysis.Results show that the processing gain varies according to the frequency offset of CW to DSSS signal carrier.

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Key concepts: Process gain, Direct-sequence spread spectrum, Interference (communication), Spread spectrum, Continuous wave, Offset (computer science), Frequency offset, Signal processing