A receiver design method based on the “mismatched” filtering processing is proposed for the multiple -in-put multiple-output (MIMO) sonar imaging application.To calculate the coefficients of the “mismatched” filter, the convex optimization method is adopted .Via numerical simulations, we show that the “mismatched” filter can suppress the sidelobes of outputs at the cost of sacrificing some white Gaussian noise gain , which is tolerable for the sonar imaging application.And thus, compared to a matched filter, better sidelobe suppression effect in the ima -ging result is obtained by using the “mismatched” filter.% 提出了利用失配滤波处理来设计多输入多输出（Multiple-Input Multiple-Output：MIMO）成像声纳的接收滤波器，并采用 cvx 工具箱来求解滤波器的系数。与匹配滤波处理相比，在牺牲一定高斯白噪声增益的前提下，失配滤波处理成功抑制了相关输出的旁瓣级。仿真结果表明，所提出的失配滤波处理方法可以有效抑制 MIMO 声纳成像结果中的距离旁瓣干扰。
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