单比特数字接收机  

Monobit Digital Receiver

作　　者：董晖[1] 姜秋喜[1] 毕大平[1] 

机构地区：[1]解放军电子工程学院,合肥230037

出　　处：《现代雷达》2005年第2期53-56,共4页Modern Radar

摘　　要：介绍了单比特电子战数字接收机的基本原理,该接收机在简化DFT算法的同时采用低比特A/D变换,降低了宽带电子战接收机的实现难度,克服了由于超宽带高速采样带来的一系列问题。分析了加窗对单比特接收机的性能影响,并给出了一种基于DSP的实现方法,在此基础上建立了一个单比特电子战系统测试系统。利用该系统通过仿真试验,详细研究了单比特接收机的虚警概率、检测概率及双信号动态范围,并与DFT接收机进行了比较,并指出除了双信号动态范围较小外,单比特电子战接收机的性能基本相同。增加输入信号的比特数是提高单比特电子战接收机双信号动态范围的有效方法,当采用 2比特量化时该动态范围可以增加 5dB。最后分析了该接收机的应用前景。The basic principles of monobit EW receiver are introduced. The degree of realization difficulties are reduced by simplifying the DFT algorithm and employing low bit A/D. A series of problems for ultra wideband high speed sample are overcome by these methods. Window function's performances are analyzed, and the realization methods based on DSP are given. Monobit EW receiver test systems were built basing on these methods. Monobit receiver's false alarm probability, detection probability and double signal dynamic range are studied in detail and compared with DFT receiver. Compared with DFT receiver, the monobit EW receiver almost has the same properties except low double signal dynamic range. Its double signal dynamic range can be enhanced by increasing the input signal bit, for example, the dynamic range can be increased 5 dB by 2 bit A/D. The receiver's application prospects are analyzed at finally.

关 键 词：单比特 电子战 数字接收机 

分 类 号：TN957.5[电子电信—信号与信息处理]