频率选择衰落信道中OFDM的速率兼容穿孔涡轮编码混合ARQ

The 57th IEEE Semiannual Vehicular Technology Conference, 2003. VTC 2003-Spring. Pub Date : 2003-04-22 DOI:10.1109/VETECS.2003.1208888

D. Garg, F. Adachi

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引用次数: 27

摘要

近年来，正交频分复用技术(OFDM)由于能够在严重的频率选择性衰落信道中实现高数据速率传输，在移动无线电通信领域受到了广泛的关注。速率兼容穿孔涡轮编码混合ARQ (RCPT HARQ)可以提高DS-CDMA系统的吞吐量性能。然而，RCPT HARQ在多大程度上提高了OFDM系统的吞吐量性能还没有完全理解。本文通过计算机仿真对RCPT HARQ在OFDM系统中的性能进行了评估。研究发现，当每次重传的冗余位数最小时，ⅱ型RCPT HARQ的吞吐量最高，典型的情况是当奇偶校验序列的穿刺周期为8时。结果表明，采用RCPT HARQ的OFDM系统在选频信道上优于采用RCPT HARQ的DS-CDMA系统。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Rate compatible punctured turbo-coded hybrid ARQ for OFDM in a frequency selective fading channel

Recently orthogonal frequency division multiplexing (OFDM) has gained a lot of attention in mobile radio communications because of its ability to allow high data rate transmission in a severe frequency selective fading channel. Rate compatible punctured turbo coded hybrid ARQ (RCPT HARQ) has been found to give improved throughput performance in a DS-CDMA system. However the extent to which the RCPT HARQ improves the throughput performance of the OFDM system has not been fully understood. In this paper we evaluate by computer simulations the performance of the RCPT HARQ for the OFDM system. It is found that the type II RCPT HARQ has the highest throughput when minimum amount of redundancy bits are transmitted with each retransmission, typical case is when the puncturing period for the parity sequences is 8. It was found that the OFDM system with RCPT HARQ outperforms the DS-CDMA system with RCPT HARQ in a frequency selective channel.

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来源期刊

The 57th IEEE Semiannual Vehicular Technology Conference, 2003. VTC 2003-Spring.

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