摘要
提出一种引导式宽带数字接收机的改进设计,它采用信道化接收多同时到达窄信号,并采用非相干能量累积和加权数字瞬时频率测量联合检测(估计)信道化输出信号,然后,通过跨信道信号判决生成宽带信号的带宽和中频等信息,以此引导对宽带信号的变带宽数字下变频接收。理论分析与实验表明:上述措施明显提高了信号检测灵敏度和引导信息的可靠性,同时,使接收机具有较高的信号截获概率。
A cueing wideband digital receiver is presented for intercepting signals with higher probability. Channelization module is applied to its design for intercepting simultaneous signals with narrow bandwidth. And the noncoherent energy integration and the weighted digital instantaneous frequency measurement （WDIFM） find their application in the given design to detect and estimate signals of channelized output. Information, which can cue digital down converting the signal with variable bandwidth, is formed from adjacent channels decision. The improved performances of the proposed receiver, such as high sensitivity and high probability of interception, are verified by simulation results.
出处
《传感器与微系统》
CSCD
北大核心
2009年第2期100-103,共4页
Transducer and Microsystem Technologies
基金
国防预研基金资助项目(41101030402)
关键词
信道化
数字下变频
信号检测
加权数字瞬时测频
灵敏度
channelization
digital down conversion
signal detection
weighted digital instantaneous frequency measurement
sensitivity
