AWGN信道下Turbo码误比特率模型

本文研究信道编解码及信道特征对误比特率性能的影响。在实验基础上，通过曲线拟舍等数学工具，得到加性高斯白噪声信道条件下，信道编码采用Turbo码、通信系统端到端的误比特率经验模型。通过该模型，可以在发送端预测出在一定信道条件及系统参数设置下接收端的误比特率。实验表明，该模型具有极高的精度，平均误差在3％左右。该模型可以应用在信源信道联合编码及端到端的率失真优化中。

A BER Model for Turbo Code on AWGN Channel

Bit error rate(BER)characteristics is researched in this paper under the influence caused by the channel codes and channel statistic.Using mathematic tool such as curve fitting etc.,an empirical model on BER is derived on the basis of extensive experiments.The channel model used is AWGN channel.Turbo codes are used as channel codes. Given certain channel statistic and parameter set,the BER in receiver end can be estimated in sender end using this model.Extensive experimental results demonstrate that this model bears high accuracy,whose average error is around 3%,thus can be used in joint source-channel coding and end-to-end rate-distortion optimization.