信道化数字贮频技术  

Channelized digital RF memory technique

作　　者：杨文隽[1] 陈溟[1] 

机构地区：[1]中国电子科技集团公司第五十一研究所,上海201802

出　　处：《航天电子对抗》2010年第5期44-46,共3页Aerospace Electronic Warfare

摘　　要：单信道数字贮频的瞬时带宽受数字器件采样率限制,已不适应宽带信号的存贮。讨论的信道化数字贮频技术,是用瞬时带宽较窄的数字贮频器实现宽带信号的存贮。通过对信道化数字贮频重构信号的相干性和寄生电平的讨论得出结论:重构信号相对输入信号相干,信道切换引起的寄生电平决定于信道切换开关的响应时间。The instantaneous bandwidth of digital RF memory（DRFM） suffers from the constraint of the sampling rate of digital devices,it is necessary to find alternative technique to store wideband signals.In some situations,the channelized digital RF memory（CDRFM） can be applied instead of the conventional single channel DRFM.The coherence and spur level of CDRFM is studied.The theoretic analysis and simulation result indicates the reconstruct signal exhibits good coherency and the spurious signal level degradation can be ignored if the response time of channel switch is in the magnitude of nanoseconds.

关 键 词：数字射频存贮 相干性 寄生电平 假目标 

分 类 号：TN972[电子电信—信号与信息处理]