Abstract: Because of the effect of channel and noise, the effect of the traditional pilot jamming scheme will decrease because of the phase deviation. In order to avoid the problem, this paper brings forward a novel scheme based on distribution detection. Firstly, detect the phase deviation of the jamming signal by the terminal distributed in the jamming area; then the result of the detection will be sent to the jamming signal transmitter, it will drive the jamming signal phase equal to the -radian offset of the transmitted pilot tone value. Simulations prove that the scheme is effective on decreasing the phase deviation of the jamming signal.

Key words: Orthogonal Frequency Division Multiplexing (OFDM), pilot nulling, phase error, distributed detection, feedback

摘要： 由于信道及接收机噪声的影响，传统的导频干扰方案会存在相位偏差，导致干扰效果下降。为此，提出了一种基于分布式检测的导频干扰改进方案。首先，在干扰范围内分布多个检测终端，实时检测并反馈干扰信号的相位偏差；然后，干扰信号发射机实时调整干扰符号的相位，使之与目标信号导频的相位相反。仿真结果表明，该方案可以较好地减少干扰信号相位偏差对导频干扰性能的影响，提高干扰效果。

关键词: 正交频分复用, 导频消除, 相位偏差, 分布式检测, 检测反馈