容差判决和参数估计结合解决信道化接收机跨信道问题

Elimination of Cross-channel Problem in Channelized Receiver Through Tolerance Judgment and Parameter Estimation

大带宽信号通过信道化接收机后会在多个信道内产生输出,出现跨信道问题。如何快速有效地解决跨信道问题具有十分重要的意义。文章分析了相邻信道输出信号间的时间关联关系,提出了判断多信道输出信号是否来自同一辐射源的判定准则,以及一种可靠的信号时间参数估计方法,能够简便有效地解决跨信道问题。仿真结果显示:在接收机系统参数固定的情况下,能够有效地进行辐射源的同一性判定,当信噪比大于-3dB时,参数估计算法具有较高的精度,其中脉冲幅度的相对误差不超过7%。

A cross-channel problem will appear when a wide-band signal passes the channelized receiver with multi-channel output. It＇s very meaningful to solve the cross-channel problem quickly and efficiently. This paper analyzes the time-association relationship between the output signals in adjacent channel, and then a criterion of whether the outputs came from the same radiant point is proposed, meanwhile a reliable meth- od of estimating signal＇s parameters is presented, which can be used to effectively and conveniently solve the cross-channel problem. The simulation results show that the judge of the same radiant point can be performed effectively when the parameters of the receiver are stable, and while SNR is greater than -3dB, the parameter estimation algorithm is of high precision, and the relative error of pulse amplitude is less than 7 %.