摘要
为了提高直接序列扩频系统在脉冲干扰条件下的误码性能,提出了一种基于扩时技术的抗脉冲干扰新方法。对基于扩时技术的直接序列扩频(DSSS)系统模型及其脉冲抑制能力进行了分析,并提出了一种抗脉冲性能优越的扩时码方案。仿真结果表明,在误码率要求为1-0 6时,该方法和理想交织加纠错的方法相比,抗脉冲干扰能力提高了4 dB,并且不会降低信息传输速率,硬件实现容易。
A novel method based on time spreading technology was presented to improve the BER performance of DSSS （direct sequence spreading systems） in severe pulsed noise interference. The system model and the performance of the pulsed noise interference suppressing were analysed and a kind of time spreading code with ideal performance in pulsed noise suppressing also put forward. The simulation shows that the method presented in this paper can improve the pulsed noise suppressing performance up to 4 dB compared with the method based on combined coding and interleaving. The method which is easy to implement with hardware will not reduce the data rate and has strong practicality in pulsed noise suppressing.
出处
《解放军理工大学学报（自然科学版）》
EI
2006年第3期220-224,共5页
Journal of PLA University of Science and Technology(Natural Science Edition)
关键词
扩时
直接序列扩频
脉冲干扰
前向纠错
交织
spreading-time
DSSS （direct sequence spreading systems）
pulsed noise interference
FEC （forward error correction）
interleaving
