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对直接序列扩谱信号（ＤＳＳＳ）的谱特性和扩频通信的变换域抗干扰技术进 行了仿真研究和理论分析。结果表明，ＤＳＳＳ信号是相位敏感信号，大量信息包 含在其相位谱中，基于功率谱差别的干扰识别与处理的变换域抗干扰技术的效 果存在上限。为提高效果，变换域抗干扰技术必须对干扰带内扩谱信号作相位 谱估计。
The spectral characteristics of direct sequence spread spectrum signal (DSSS) and the transform domain anti-jamming technique of spread spectrum communication are simulated and analyzed. The results show that the DSSS signal is a phase-sensitive signal, and a large amount of information is contained in the phase spectrum. There is an upper limit to the effect of the transform domain anti-interference technology based on the interference identification and processing of power spectrum differences. In order to improve the effect, the transform domain anti-jamming technique must estimate the phase spectrum of the spread spectrum intra-band signal.