回波控制的新方法

在全双工模拟置乱语音系统中，近端回波直接影响通话质量。为了有效地控制近端回波，本文提出了一种基于神经网络的回波控制方法。根据实测信号及其近端回波的图形，通过理论分析和模拟实验，给出了回波对消的上界，下界及其一致收敛性。     

DECODING BEYOND THE BOUND OF THE COMPLEX-ROTARY CODE AND ITS DUAL CODE

The capabilities of decoding beyond the bound of the Complex-Rotary code (CRcodes) and its dual code are analyzed. It is obtained that the CR codes with normal error-correcting ability t = (p+1)/2 can correct (t+1)-errors up to C_(p~2+p(p+1))~(t+1)-p~(2Ct)_(2t+1) and itsdual code can correct (t_1+1)-errors up to C_(p~2+2tp)~(t_1+1)-2tpC_(p+1)~(t_1+1) where t_1=(p+1)/2-1 and pis a prime.