摘要
应用于智能交通系统的无线接入协议IEEE802.11p,其物理层卷积编码的码率可通过对(2,1,7)卷积编码器的删余来实现。讨论了删余位置的图案和算法,分析了在删余位置插入不同哑元时维特比译码后误码率的统计特性。仿真的同时比较了固定哑元下不同码率所引入的误比特率。
IEEE 802.11p, acts as wireless access protocol in the vehicular environment applied in the intelligent transportation systems, its convolutional code with three different code rate in the physical layer is achieved through （2,1,7） encoder. This paper proposed puncturing method that is omitting some encoded bits at specific position and inserting dummy metric in these places when utilize Viterbi decoder, discussed the selection on dummy metric, and finally compared BER results in inserting different dummy metrics and given code rate respectively.
出处
《电子技术应用》
北大核心
2012年第8期116-118,125,共4页
Application of Electronic Technique
关键词
智能交通
卷积编码
删余编码
哑元
intelligent transportation system
convolutional encode
puncturing
dummy metric
