基于贝叶斯规则的MVB通信误码率测试方法

摘要

Combining with the signal transmission characteristics of Multifunction Vehicle Bus (MVB),a new evaluating algorithm for BER of MVB was deduced from the posterior distribution model of Bayes.The re-quirements of confidence limits were fulfilled by this algorithm.Simulation and comparison were proceeded to test the real-time quality of this algorithm.The design schemes of hardware and implementing principle thereof were introduced to expand the BER test function of MVB protocol analyzer.Compared with traditional BER test ways,this algorithm has much better performance in respect of testing-time and accuracy.It is suitable for actual proj ects to carry out communication quality tests.%误码率是衡量数字通信系统可靠性的重要指标。本文结合多功能车辆总线(MVB)信号传输特点,设计出一种新型的基于贝叶斯规则后验概率模型的 MVB误码率估计算法,并使结果满足置信度要求；仿真和对比不同误码条件下,MVB误码率测试的实时性能；设计了硬件实现方案,进行了 MVB协议分析装置的误码率测试功能扩展。该算法硬件实现简便,在测量时间及准确性方面较之传统方法有明显提高,适合工程现场对于 MVB进行通信质量测试。