用于数字信号处理的空间积分声光相关器

Space-Integrating Acousto-Optic Correlator for Digital Pulses

本文研究用声光器件实现实时相关的处理方法，推导了声光信号处理器的数学模型，提出了一种能够实现高速数字脉冲序列相关的小型、宽带、空间积分声光信号处理系统，并对其设计和性能进行了分析．本系统使用一个半导体激光器及若干透镜实时地完成相关操作．用巴克码序列及其时间反转作为输入，获得了与理论分析相一致的实验结果．

This paper discusses the methods of real-time correlation operation performed by the acousto-optic Bragg cell,and develops the mathematical models of the acousto-optic signal processing system that provides the correlation of high-speed digital pulse trains ,and a description of the system performance. The system utilizes a semiconductor diode laser,a Bragg cell with bandwidths of 100 MHz and aperture times of 7.4 μs,some lens and a photodiode-detector to perform the correlation operation in real time. With Barkor code sequences and its time inverse as inputs,the experimental results that correspond with the theory are obtained.