A new Hybrid ARQ scheme based on Blind Separation Sources over MIMO system in multipaths radio fading channel

Moulay Ahmed Faqihi, B. Nsiri, A. Adib, D. Aboutajdine, S. Saoudi
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Abstract

In this paper, we propose a new scheme of Hybrid ARQ (Automatic Repeat reQuest) strategy, based on Blind Separation Sources over Multi Input Multi Output (MIMO) architecture. In the classical HARQ case, when the received packet is erroneous, the system should send a NACK to ask the transmitter to re-send the same packet. Known that in this case, the receiver could use different copies of the emitted signal to ensure a combination of ARQ, we propose in our approach to transmit different copies of the same packet, but simultaneously over multiple antennas, in order to provide a MIMO system. This approach makes possible the recovering of the erroneous packets, by using the received copies instead of asking for a retransmission, which is very time- and treatment- consuming. The temporary diversity is assured by applying the interleaver to each copy of the transmitted packet, as well as the determination of the emitted signal's copies by using the Blind Separation Sources (BSS) concepts, without prior information about the transmission channel. The simulations show that the proposed scheme provides good results in term of frame error rate.
多径衰落信道下MIMO系统中一种基于盲分离源的混合ARQ方案
本文提出了一种基于多输入多输出(MIMO)结构的盲分离源混合自动重复请求(ARQ)策略。在经典的HARQ情况下,当接收到错误的数据包时,系统应该发送一个NACK请求发送器重新发送相同的数据包。已知在这种情况下,接收器可以使用发射信号的不同副本来确保ARQ的组合,我们建议在我们的方法中传输相同数据包的不同副本,但同时在多个天线上,以提供MIMO系统。这种方法使恢复错误的数据包成为可能,通过使用接收到的副本,而不是要求重新传输,这是非常耗时和治疗消耗。临时分集是通过将交织器应用于传输数据包的每个副本,以及使用盲分离源(BSS)概念确定发射信号的副本来保证的,而不需要关于传输信道的先验信息。仿真结果表明,该方案在降低帧误码率方面取得了较好的效果。
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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