Electrically addressed liquid crystal devices（EALCD） were used in the joint transform correlator,its transmittance is relatively lower,so the contrast of the power spectrum was relatively lower,the output correlation peaks were seriously affected.In this paper,the power spectrum was filtered with the enhanced high-frequency filter,its contrast was obviously improved,the information was increased too,so got a pair of satisfactory correlation peaks.The experimental results show that the method is feasible and gives the select range of high-frequency filter parameters.%在实时联合变换相关器中,由于电寻址液晶透过率较低,造成功率谱对比度比较低,相关峰强度太弱,甚至得不到相关峰.应用高频增强滤波处理技术对功率谱进行滤波处理,能有效提高功率谱对比度,增加信息量,得到较好的相关峰.实验结果证明该方法可行,产生的相关点亮度大幅提高,有利于目标的识别和定位,并给出高频增强滤波参数的选取方法.
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