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一、引言在正交通道的雷达数字信号处理中,通常在数字滤波器后的恒虚警检测、比幅测角、显示、数据处理及各种特性曲线绘制等,都需要先对信号矢量的正交分量求模,即完成A=(I~2+Q~2)~(1/2)的运算。运算必须快速实时,并满足一定的精度要求。在一些有关数字信号处理的文献中,曾提及过分段线性近似算法(?)L+b_iS。其中,L=max{|I|,|Q|},S=min{|I|,|Q|}。然而,所推荐的系数a_i,b_i众说各异。
I. INTRODUCTION In the radar digital signal processing of the orthogonal channel, the constant false alarm detection usually after the digital filter, than the measured angle, the display, the data processing and the drawing of various characteristic curves all need to first measure the signal vector Orthogonal component of the modulus, that is to complete A = (I ~ 2 + Q ~ 2) ~ (1/2) of the operation. Computation must be fast and real-time, and meet certain accuracy requirements. In some literature on digital signal processing, we have referred to the piecewise linear approximation algorithm (?) L + b_iS. Here, L = max {| I |, | Q |}, S = min {| I |, | Q |}. However, the recommended coefficients a_i, b_i vary widely.