| 基于延时相乘结构的直扩载波最优检测 | |
| 石明军 ; 徐振平 ; 肖立民 ; 周世东 ; 姚彦 ; SHI Mingjun ; XU Zhenping ; XIAO Limin ; ZHOU Shidong ; YAO Yan | |
| 2010-06-09 ; 2010-06-09 | |
| 关键词 | 直接序列扩频 延时相乘 载波检测 direct sequence spread spectrum delay-and-multiply carrier detection TN914.42 |
| 其他题名 | Carrier detection of direct sequence spread signals based on a delay-and-multiply device |
| 中文摘要 | 针对直接序列扩频信号在通信、导航和雷达等应用中具有低信噪比和低截获概率等特点,给信号侦察带来很大困难,提出了一种基于延时相乘结构的载波信号最佳检测方法。通过推导检测器的输出信噪比,研究了延时、带宽和输出信噪比的关系,得到了最优的参数设置方法。分析表明:在已知部分参数下,延时为零而且匹配滤波时检测器性能最佳;在未知参数条件下,当延时与带宽之积为0.4时,检测器性能达到最佳。在此基础上,分析了检测器的性能,并通过仿真实验验证了提出方法的有效性。; Direct sequence spread spectrum signals are now widely used for communications,navigations systems and radar due to their low signal-to-noise ratios(SNR) and low probability of interception.However,spectrum surveillance of DSSS signals is difficult.Thus,a carrier detection method was developed based on delay-and-multiplication pre-filters.The relations between the delay,bandwidth and output SNR are used to idenfity the optimal system parameters.A theoretical analysis shows that with known partial parameters,the optimal detector is equivalent to the matched-filter energy detector with zero delay.With unknown parameters,the optimal bandwidth-delay product of the detector is 0.4.Simulations of the system performance with these settings verify the effectiveness of the method.; 国家“九七三”重点基础研究项目(2007CB310608) |
| 语种 | 中文 ; 中文 |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/54317]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | 石明军,徐振平,肖立民,等. 基于延时相乘结构的直扩载波最优检测[J],2010, 2010. |
| APA | 石明军.,徐振平.,肖立民.,周世东.,姚彦.,...&YAO Yan.(2010).基于延时相乘结构的直扩载波最优检测.. |
| MLA | 石明军,et al."基于延时相乘结构的直扩载波最优检测".(2010). |
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