摘要
由于数字接收机对瞬时宽带信号实时处理以及高精度测量的要求,所以设计了一种高效的数字信道化接收机系统.采用多相滤波和短时快速傅里叶变换技术结合多相快速傅里叶变换的实时宽带数字接收机,能够对宽带信号实时滤波、检测和参数测量,不仅具有较高的时频测量精度,而且数据输出率低.基于该方法利用现场可编程门阵列和数字信号处理器件设计了瞬时带宽为640 MHz的宽带数字接收机,提高了测量精度.
The digital receiver should possess the ability to process a large number of data in real-time for the wideband signal. A new kind of efficient digital channelized receiver is proposed in this paper which is based on polyphase filters and short-time FFT technology（polyphase fast Fourier transform）. It can detect objects and measure parameters for the wideband signal in real-time. A digital receiver system with a 640 MHz instantaneous bandwidth is built based on the structure proposed using FPGA and DSP devices. It has high accuracy of time-frequency parameter measurement and low data output ratio, which shows the structure is feasible.
出处
《西安电子科技大学学报》
EI
CAS
CSCD
北大核心
2010年第3期487-491,553,共6页
Journal of Xidian University
基金
"十一五"国家部委预研基金资助项目(9140A07020806DZ01)
关键词
多相快速傅里叶变换
信道化接收机
参数估计
polyphase fast Fourier transform
channelized receiver
parameter estimation
