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正在研制用于通讯和雷达的信道化接收机,用它们来截获、筛选和分类电磁频谱的射频、微波和毫米波范围单位时间内密度正迅速增大的各种信号。因为现有的对每种信号都具有高截获力的接收机对截取更高密度的信号无能为力,所以需要这些新的接收机。在研制能同时截获时间重合信号的信道化接收机中,必须考虑的重要参数是动态范围、带宽、信号处理能力、体积、重量以及功耗。本文评述了信号处理的要求和能力、接收机和信道机技术,以及声表面波、体声波、静磁波和声光信道技术的新进展。
Channelized receivers for communications and radar are being developed for intercepting, screening and sorting the various signals in the electromagnetic spectrum where radio frequency, microwave and millimeter-wave ranges are rapidly increasing in density over time. Because existing receivers that have high acquisition power for each type of signal are incapable of intercepting higher density signals, these new receivers are needed. Important parameters to consider in developing channelized receivers that can simultaneously capture time coincidence signals are dynamic range, bandwidth, signal processing capability, volume, weight, and power consumption. This article reviews the requirements and capabilities of signal processing, receiver and channel machine technologies, and new advances in surface acoustic wave, bulk acoustic wave, magnetostatic wave, and acousto-optic channel technologies.