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以DSSS系统中频域干扰抑制算法为研究对象,针对干扰抑制模块的引入会给通信系统带来信噪比损耗的问题,首先介绍了频域干扰抑制技术的基本思想,其次重点分析了频域干扰抑制算法影响信噪比损耗的具体因素,主要包括窗函数类型、窗长度、加窗重叠度、阈值处理以及IFFT变换后的数据处理方式,然后对各个影响因素进行理论推导,并结合仿真分析,给出了各种情况下信噪比的损耗值,为干扰抑制算法的参数设计提供了依据。
Taking the frequency-domain interference suppression algorithm in DSSS system as the research object, the introduction of interference suppression module brings the problem of signal-to-noise ratio loss in the communication system. Firstly, the basic idea of frequency-domain interference suppression technology is introduced. Secondly, The main factors affecting the SNR loss, such as window function type, window length, window overlap degree, threshold value processing and IFFT data processing method, and then theoretical deduction of each factor, combined with simulation analysis, The loss values of signal-to-noise ratio under various conditions are given, which provides the basis for the parameter design of interference suppression algorithm.