摘要
随着数字化电子侦察接收机宽带化和实时性要求的日益提高,高速高精度采样和庞大数据处理间的相互制约已经成为影响其性能的主要因素。目前,适当降低量化精度以缓和大带宽和实时处理矛盾的技术途径已经出现,但量化精度对数字化接收机综合性能的影响却并未得到系统的分析。本文通过数值仿真,分析了不同量化精度下数字化接收机的测频精度、灵敏度、动态范围等技术性能的特点,并指出了信噪比对低比特数字化接收机信号功率谱和双音动态范围的影响。
Increasing with the demand on both wideband and real-time processing, the performances of digital electronic reconnaissance receiver were limited by the interaction between high-speed sampling with high precision and signal processing of huge data. Now, a solution method is occurred to relax the contradiction by properly decreasing quantization precision. But no paper discussed the influence of quantization precision on digital receiver performances. In this paper, the characters of digital receiver are numerically analyzed, such as frequency-measurement precision, sensitivity and dynamic range in the case of different quantization precision. Furthermore, The effect of signal-to-noise on the signal power spectnun and instantaneous dynamic range of low-bit distal receiver is proposed.
出处
《电子信息对抗技术》
2006年第6期20-23,38,共5页
Electronic Information Warfare Technology
关键词
数字化接收机
量化精度
电子战
digital receiver
quantization precision
electronic warfare
