多径分量噪声干扰下无线电扩频通信优化技术

Optimization of radio spread spectrum communication under multipath component noise interference

无线电扩频通信受到多径分量噪声的干扰,导致通信信道均衡性不好,抗干扰能力不强,误码率较高。需要进行噪声干扰抑制,改善无线电扩频通信质量。提出一种基于自适应级联陷波和码间干扰抑制的无线电扩频通信优化技术。构建无线电扩频通信系统传输结构模型,采用自适应陷波器对无线电扩频通信中的多径分量噪声进行有效抑制,降低了进入信号通频带内的干扰功率,提高解调器的输出信噪比和信干比。采用扩展后的序列去调制载波,将信号搬移到载频上,实现信道均衡,提高抗干扰能力。仿真结果表明,该算法能有效降低无线电扩频通信的误比特率,抗干扰性较强,提高通信质量。

The radio spread spectrum communication is subjected to the interference of the multipath component noise,which leads to the poor communication channel equalization,the ability of anti interference is not strong,and the bit error rate is high. Noise interference suppression is needed to improve the quality of radio spread spectrum communication. An optimization technique of radio spread spectrum communication based on adaptive cascade notch and inter symbol interference suppression is proposed in the paper. The paper presents the construction of radio spread spectrum communication system transmission structure model,and selects an adaptive notch filter to decrease the noise of the spread spectrum radio multipath components,which reduces the signal access to in band interference power,improves the demodulator output signal-to-noise ratio and signal to stem ratio. With the expansion of the sequence to modulate the carrier,the signal is moved to the carrier frequency,furthermore channel equalization is realized,and anti-interference ability is improved. Simulation results show that the proposed algorithm can effectively reduce the bit error rate of spread spectrum communication,and improve the communication quality.