可重构RF采样接收机中时钟抖动的影响  

Research on Effect of Clock Jitter on Reconfigurable Direct RF Receiver

作　　者：毕爽君 吕幼新[1] 

机构地区：[1]电子科技大学电子工程学院,成都611731

出　　处：《电子信息对抗技术》2014年第2期70-74,共5页Electronic Information Warfare Technology

摘　　要：对可重构直接RF采样接收机(RDRFR)及相关技术进行了研究与分析。脉冲采样下变频技术在RDRFR接收机中起着至关重要的作用,其主要影响因子是时钟抖动。理论推导和仿真分析了时钟抖动对接收系统信噪比的影响,对比分析了RDRFR接收机与直接RF采样接收机信噪比的不同,仿真结果表明RDRFR接收机中其信噪比随输入频率的增加呈阶梯递减的趋势,并且随着采样频率的增加信噪比恶化愈严重。The rapid growth of modern communication and radar systems leads to emergence of reconfigurable direct RF sampling receiver （RDRFR）. The key technologies are discussed in RDRFR. The main factor of down-converter through pulse sampling is clock jitter. Theoretical analysis and simulation shows the impact of clock jitter on the SNR of the system. Differences between the SNR of RDRFR and direct sampling receivers are analyzed too. The results show that the SNR decrease with the increase of input signal frequency as a stair step pattern,and in- tensive jiltcred clock can also result in a serious deterioration of the SNR.

关 键 词：可重构 RF采样 时钟抖动 信噪比 

分 类 号：TN971.1[电子电信—信号与信息处理]