模数转换器(ADC)性能对雷达系统的影响性分析  

Analysis of the Influence of ADC Performance on Radar System

作　　者：任圣君 陈少昌[1] 

机构地区：[1]海军工程大学电子工程学院,武汉430033

出　　处：《舰船电子工程》2017年第10期60-65,共6页Ship Electronic Engineering

摘　　要：在软件化雷达实现的过程中,模数转换器扮演着极其重要的角色,它是连接模拟世界和数字世界的唯一桥梁,是模拟电路和数字电路的分水岭,是雷达信号进入数字化处理的关键一步。因此,ADC的性能会对雷达的信号处理、检测估计等过程产生直接影响,对软件雷达的实现起到至关重要的作用。文章就针对模数转换器的速度、精度等性能对后续雷达信号处理的影响进行评估分析。利用Matlab软件进行数据仿真,模拟ADC在采样、量化过程中的一系列性能指标,着重分析模数转换过程中的量化噪声以及时钟抖动对雷达系统的影响,包括对信噪比的影响,雷达威力范围的影响等。最终通过仿真分析验证了理论的正确性。In the process of realizing software-based radar,digital-to-analog converter plays an important role. It is the onlybridge connecting analog world and digital world. It is a vital step of radar signal entering digital processing. Therefore,the perfor-mance of ADC will have a direct impact on radar signal processing,the process of detection and estimation,and play an importantrole in software radar implementation. This paper analyzes and evaluates the effect of the speed and accuracy of the digital-to-ana-log converter on the subsequent radar signal processing. Data simulation using Matlab software to simulate ADC sampling,quantiza-tion process in a series of performance indicators,Focusing on the analysis of the impact of digital-to-analog conversion in the pro-cess of quantization noise and clock jitter on radar systems,including the impact on the signal to noise ratio,the impact of the rangeof the power of radar. Finally,the correctness of the theory is verified by simulation analysis.

关 键 词：模数转换器 量化噪声 时钟抖动 软件化雷达 

分 类 号：TN95[电子电信—信号与信息处理]