9.4部分响应基带传输系统 5误码扩散现象 判决时由某一位判决错误造成其后若干位码出现错误的现象称 之。例: 信码101101001100010 +1-1+1+11+1-1-1+1+1-1-1-1+1-1 an-1+1-1+1+1-1+1-1-1+1+1-1-1-1+1-1 00+2000-20+20-2-200 接收cn00+200000+20-2-200 n+1-1+1+1-1+1-1+1-1+3-3+1-3+3+3 出现误码扩散的原因:相邻码间出现相关性 2001 Copyright SCUT DT&P Labs2001 Copyright SCUT DT&P Labs 8 9.4 部分响应基带传输系统 5.误码扩散现象 判决时由某一位判决错误造成其后若干位码出现错误的现象称 之。例： 信码 1 0 1 1 0 1 0 0 1 1 0 0 0 1 0 an +1 -1 +1 +1 -1 +1 -1 -1 +1 +1 -1 -1 -1 +1 -1 an-1 +1 -1 +1 +1 -1 +1 -1 -1 +1 +1 -1 -1 -1 +1 -1 cn 0 0 +2 0 0 0 -2 0 +2 0 -2 -2 0 0 接收c’ n 0 0 +2 0 0 0 0 0 +2 0 -2 -2 0 0 a’ n +1-1 +1 +1 -1 +1 -1 +1 -1 +3 -3 +1 -3 +3 +3 出现误码扩散的原因：相邻码间出现相关性