摘要
实际的无线通信系统中,传输延时是表征系统性能的重要参数.本文根据速率兼容打孔turbo码的特性,提出了一种新的混合自动重传请求(HARQ)的递增冗余方法.该方法根据当前的信道状况设定递增冗余的初始状态,选择初始发送的校验比特.仿真结果表明,采用新方法后,数据正确接收所需的传输延时明显降低,并且简单实用,便于实现.
In the actual wireless communication systems, the transmission delay is one of dominant factors which determine the system performances. A new incremental redundancy hybrid automatic repeat request (HARQ) scheme based on the characters of rate compatible punctured turbo codes is proposed. With the method, the initial state of incremental redundancy system and the initial sending parity bits according to the channel condition will be set. As to the new scheme, simulation results are provided that transmission delay for the data frame received correctly is distinctly reduced and it is applied easily.
出处
《北京邮电大学学报》
EI
CAS
CSCD
北大核心
2005年第1期66-69,共4页
Journal of Beijing University of Posts and Telecommunications
基金
国家自然科学基金项目(90204001
60372099)
关键词
混合自动重传请求
TURBO码
递增冗余
传输延时
自适应
hybrid automatic repeat request
turbo code
incremental redundancy (IR)
transmission delay
adaptive
