一种用于OFDM系统的频率分集ARQ方案  

A frequency diversity ARQ scheme for OFDM systems

作　　者：凌献忠[1] 

机构地区：[1]南京邮电大学通信与信息工程学院,南京210003

出　　处：《信息技术》2009年第1期47-49,共3页Information Technology

摘　　要：研究了一种适合高数据速率的正交频分复用OFDM传输的频率分集ARQ方案。通过采用等增益合并和子载波分配等技术,该方案可利用频率分集来有效减少慢衰落信道中的重传次数。计算机仿真显示在累计正确分组接收率为0.99时此方案的重传次数为3次,而普通的方案要10次以上。This paper discusses on a frequency diversity automatic repeat request （ARQ） scheme for high data rate orthogonal frequency division multiplexing （OFDM） systems. By using equal-gain combining and the regular subcarrier assignment, the scheme can be used to reduce the number of ARQ retransmissions in slow fading environments by exploring the potential frequency diversity. The computer simulation results show that the proposed scheme reduces the number of retransmissions to about 3 at the accumulative correct packet reception rate （ACPRR） of 0.99 while the conventional schemes lead to more than 10.

关 键 词：正交频分复用 自动请求重发 累计正确分组接收率 

分 类 号：TN911[电子电信—通信与信息系统]