雷达侦察宽带信号的检测技术

Detection technology of broadband signal in radar reconnaissance

针对分数阶信道化接收机自身的结构特点,提出了一种适用于分数阶信道化接收机的信号检测方法,以满足更低的信噪比环境和不同脉冲宽度的雷达侦察信号.首先研究了时域法、频域法和自相关积累法3种信号检测方法,并对这3种方法进行了对比,在此基础上提出了改进后的自相关积累检测算法,使其适用于检测分数阶信道化接收机的输出信号,并给出了MATLAB仿真结果.最后完成了FPGA中奇偶分数阶信道化接收机系统的实现,完善了接收机系统.

According to the structural characteristics of the fractional,it proposed a detection method applies to fractional channelized receiver signal detection method for the lower signal to noise ratio environment and different pulse width of radar signal reconnaissance. First of all,the time-domain method,frequency domain method and autocorrelation method are studied,and the three methods are compared. On the basis of this,an improved auto correlation detection algorithm is proposed,which is suitable for the detection of the output signal of the fractional order channel receiver,and the simulation results of MATLAB are given. At last,the realization of the system of the parity and fractional order channel receiver in FPGA is completed,and the receiver system is improved.