纠错码性能仿真中的误码率估计  

Estimates for BER of error correcting codes in performance simulations

作　　者：贺玉成[1] 杨莉[1] 王新梅[1] 

机构地区：[1]西安电子科技大学综合业务网国家重点实验室,陕西西安710071

出　　处：《通信学报》2001年第9期99-103,共5页Journal on Communications

基　　金：华为科技资助项目;国家自然科学基金资助项目 (6 9972 0 35 )

摘　　要：在纠错码性能仿真中 ,一般是在给定信噪比后 ,由实测的错误信息比特数与发送信息比特总数相比来估计误码率的 ,这种方法在大码长或者极低误码率情况下 ,可信程度不高。本文提出用仿真数据计算后验概率分布参数的方法来直接估计纠错码误码率及其置信区间 ,给出了误码率的上界 ,由少量测试数据仍然可以获得比较可靠的误码率估计。由于这种后验估计考虑了信道特性 。The bit error rate(BER)is generally calculated as the ratio of the number of tested error bits to that of transmitted information bits at a given signal to noise ratio in the simulation for the performance of some error correcting code The conventional method can not achieve as much higher confidence in the cases of long codeword length and very low BER Using the parameters of the posterior distribution based on tested data,a simple method for estimating BER with a confidence interval is proposed,and the upper bound for estimates is also introduced Much more reliable estimated BERs can be obtained from a few tested data Due to the introduced characteristics of channels,the proposed methodology for the posterior estimate applies to any generalized channel model

关 键 词：纠错码 误比特率 可靠性 性能仿真 误码率估计 

分 类 号：TN911.22[电子电信—通信与信息系统]