ADC性能对宽带数字阵列遥测系统接收通道增益设计的影响分析  

Analysis of Influences on Receiver Channel Gain in the Digital Array Telemetry System Caused by the ADC Component

作　　者：周家喜[1] 张正宇[1] Zhou Jiaxi;Zhang Zhengyu(The 38th Research Institute of China Electronics Technology Group Corporation,Hefei 230088,Chin)

机构地区：[1]中国电子科技集团公司第三十八研究所,合肥230088

出　　处：《遥测遥控》2018年第3期48-52,共5页Journal of Telemetry,Tracking and Command

基　　金：国家自然科学基金(61671416)

摘　　要：针对数字阵列在大带宽、高动态、多目标遥测系统上的应用,分析宽带数字阵列遥测系统与传统高增益天线遥测系统在设计上的区别,详细分析影响接收通道增益设计的主要因素,重点就ADC器件性能对通道增益设计的影响进行了分析。通过计算仿真信号在经过ADC以及数字波束形成的过程中,ADC器件自身信噪比SNR和无杂散动态范围SFDR两个重要参数给接收信号信噪比带来的恶化,给出了数字阵列遥测系统中通道增益设计的门限值。Focusing on the application of digital array in telemetry systems with wide bandwidth and high dynamic range for multi targets, this paper analyzes the differences between broadband digital array telemetry system and traditional telemetry system with high gain antenna. Then the main factors which impact the receiver gain are discussed in detail. Further, we lay special stress on analyzing the influences on receiver gain caused by the ADC component. The negative effects brought to the SNR of received signal by SNR and SFDR of ADC are calculated, and the threshold value of the receiver gain in the digital array telemetry system design is given.

关 键 词：ADC器件性能 宽带 多波束遥测 通道增益 

分 类 号：V243.5[航空宇航科学与技术—飞行器设计]