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为了对扩谱通信和宽带雷达用的时宽带宽积超过10~3且具有连续变化扩展码的宽带波形进行匹配滤波,已研制出声表面波卷积器及其辅助电路。对扩谱通信来说,为了使时宽宽积为10~6或更大的波形与100兆赫信号的微秒级搜索窗相关,以及实现数据解调和测距的反多路径处理,提出了一些附加信号外理技术。对宽带雷达来说,包括距离选通和缓冲用的高速光电子跟踪保持电路,以及多普勒处理用的电荷耦合器件矩阵-矩阵乘积电路芯片,还有声表面波卷积器,以便为1280个距离单元的每个提供0.75米的距离分辨力和32个多普勒单元。
In order to perform matched filtering on wideband waveforms with time-bandwidth products exceeding 10 ~ 3 and spreading codes with continuous changes for spread spectrum communications and wideband radars, surface acoustic wave convolvers and their auxiliary circuits have been developed. For spread spectrum communication, in order to correlate waveforms with a time-width product of 10 to 6 or more with a microsecond search window of a 100 MHz signal and to perform anti-multipath processing for data demodulation and ranging, Some additional signal processing technology. For wideband radars, including high-speed opto-electronic tracking and holding circuits for gated and buffered distances, and charge-coupled device matrix-matrix product circuit chips for Doppler processing, there are also surface acoustic wave convolvers that operate at 1280 distances The units each provide a distance resolution of 0.75 meters and 32 Doppler units.