It consists of three main parts: in the first part, we analyse the effect of multipath on code-tracking loops of receivers in Spread-Spectrum Ranging Systems.

本文分为三个主要部分：第一部分分析了多径对扩频测距系统接收机码跟踪的影响机理。

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Multipath is one of the major sources in the Spread-spectrum ranging systems.

多径是扩频测距系统的主要误差源之一。

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This new scheme has the advantages of high spectrum efficiency and suppression of multipath spread, frequency selective fading, jamming and noise.

该体制具有较高的频率利用率，可有效地抑制短波信道中多径时延、频率选择性衰落、人为干扰与噪声带来的不利影响。

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