In a multipath environment an uncoded OFDM transmission system has a bit error rate ( BER) comparable with a narrowband radio channel because the fading of each subcarrier is frequency nonselective. 在多路径环境下,因为每一个副载波的衰落是不能进行频率选择的,一个无编码正交频分复用传输系统与窄带无线电传输信道相比较,有一个误码率问题。
Simulation shows that at a bit error probability of 10~ (-7) the suggested codes gain 3~ 6 dB over uncoded transmission. 仿真结果显示当误码率为10-7时,其编码增益相对于未编码增加了3至6dB。