摘要
超宽带信号具有良好的低截获特性,通过对该信号主要参数的检测与估计来分析其抗截获性能,是现代非协作通信系统研究中的关键问题,具有重要的应用价值。本文提出了将二次谱算法应用于DS-UWB信号的伪码周期估计,从理论上分析了该算法对DS-UWB信号伪码周期估计的适用性,分析表明根据二次谱峰值谱线间距可有效估计出其伪码周期。通过仿真实验对比了采用该算法检测DS-UWB和DSSS信号伪码周期的抗截获性能,实验结果表明在信息速率和扩频后带宽相同的条件下,DS-UWB具有更好的抗截获性能,对伪码周期估计时所需检测信噪比,DS-UWB优于DSSS信号3dB。
Ultra-Wide-Band （UWB） has the property of favorable low probability of interception. The analysis of anti-interception performance is the key problem and the valuable application of the modem non-cooperation communication systems, which can be evaluated by detection and estimation of the main signal parameters. The reprocessing power spectrum based on the estimation algorithm of PN code period of DS-UWB is proposed. The validity of the proposed method for DS-UWB PN code period estimation is theoretically researched, and the PN code period can be obtained according to the interval of spectrum lines of reprocessing power spectrum. Under the same information rate and bandwidth, the simulation experiments are used to estimate the PN code period of DS-UWB and DSSS. The result shows that the anti-interception performance of DS-UWB is better than that of the DS-SS 3 dB in terms of detection SNR.
出处
《电子测量与仪器学报》
CSCD
2009年第5期58-62,共5页
Journal of Electronic Measurement and Instrumentation
基金
国家自然科学基金(编号:60572148)资助项目
电子54所校所基金(编号:GH0742017)资助项目
关键词
DS-UWB
伪码序列
二次谱
低截获
direct sequence Ultra-Wide-Band
PN code sequence
reprocessing power spectrum
LPI
