对数混合的短波信道数字AGC算法

为减小短波信道对接收机AD后端信号输出功率的影响,提出一种对数混合的短波信道数字AGC算法.分析了数字AGC的线性调整算法、对数调整算法、自然对数调整算法,采用自然对数与对数混合式的调整算法,实现短波接收机 AD后端数字信号功率稳定变化.仿真结果表明:混合式 AGC算法实现了 AGC跟踪速率和对噪声的敏感性的折中,整体性能最优,且算法的实现复杂度与线性、对数和自然对数AGC算法基本相当.

Digital AGC Algorithm for Short-ware Channel Based on Logarithmic Mixture

For reducing the influence of short-ware channel to signal output power of AD after end in receiver, the paper proposes a digital AGC algorithm for short-ware channel based on logarithmic mixture. It analyzes the linear adjustment algorithm, logarithmic adjustment algorithm, natural logarithmic adjustment algorithm of digital AGC, adopts a mixed adjustment algorithm of natural logarithmic and logarithmic, implements the stability change of digital signal power of AD after end in short-ware receiver. Simulation results show the mixed AGC algorithm achieved the compromise between AGC tracking rate and sensitivity of noise, the overall performance is optimal, and the complexity is basically the same as linear, logarithmic and natural logarithmic algorithm.