扩频通信系统跟踪解扩的优化设计

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中图分类号：TN929 文献标识码：A DO1： 10.7535/hbgykj. 2026yx01001

Abstract：To adress the problem that the demodulation performance of a spread spectrum communication system was constrained by the despreading and tracking of spread spectrumcodes，a spread spectrum code tracking error suppresion scheme basedon theco-optimizationof single/multi-sample despreading strategiesand therolloffactor was designed.By constructing a spread spectrumcode tracking error modeland combining withthesingle/multi-sample despreadingstrategyand rolloff factor co-optimization method，specificapproachesfor theoptimized designof the spread spectrum system were proposed.A simulation platform was built to verify the efectivenessof the scheme.The results show that spread spectrum codetracking erroris positivelycorrelated with despreading SNRloss，the larger therolloffactorandtheerror，the more significanttheloss；Underscenarios with smallspread spectrun tracking errors，singlesample despreading outperforms multisampledespreading intermsofpureperformance，anti-wideband/narrowband interferencecapability，and eroradaptability. Singlesampledespreadingcombined with reasonabletracking parameter design （such as 8-times coderate sampling orresampling） effectivelyimproves thedirectsequence spread spectrum（DSSS）demodulationperformance，canprovidetheoreticalsupportandnew ideas for the engineering implementation of optimized design in spread spectrum communication systems.

Keywords： radio technology;code track;despreading；single sample

扩频通信以其抗干扰性强、抗多径衰落性好、隐蔽性高等特点被广泛应用于多个领域，特别是卫星通信领域。（剩余11190字）