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arXiv 1106.0488cs.ITmath.IT
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一种部分解码转发中继的半双工协作方案

A Half-Duplex Cooperative Scheme with Partial Decode-Forward Relaying

Ahmad Abu Al Haija, Mai Vu

摘要:

在本文中,我们提出了一种新的合作通信方案,包括两个用户在半双工模式与一个目的地通信在一个离散的无记忆信道。用户将消息编码成独立的块,并将每个块的传输分成具有可变持续时间的3个时隙。通过在这3个时隙上的部分解码转发中继来执行协作。在前两个时隙期间,每个用户交替地发送和解码,而在最后一个时隙期间,两个用户合作向目的地发送信息。该方案的可实现速率区域是通过在3个时隙上使用叠加编码和联合最大似然(ML)解码来获得的。本文详细讨论了高斯信道的一个例子,并给出了它的可达速率域。结果表明,所提出的半双工方案实现了显着更大的速率区域比经典的多址接入信道,并接近性能的全双工合作计划作为用户间的信道质量的增加。

英文摘要:

In this paper, we present a new cooperative communication scheme consisting of two users in half-duplex mode communicating with one destination over a discrete memoryless channel. The users encode messages in independent blocks and divide the transmission of each block into 3 time slots with variable durations. Cooperation is performed by partial decodeforward relaying over these 3 time slots. During the first two time slots, each user alternatively transmits and decodes, while during the last time slot, both users cooperate to send information to the destination. An achievable rate region for this scheme is derived using superposition encoding and joint maximum likelihood (ML) decoding across the 3 time slots. An example of the Gaussian channel is treated in detail and its achievable rate region is given explicitly. Results show that the proposed half-duplex scheme achieves significantly larger rate region than the classical multiple access channel and approaches the performance of a full-duplex cooperative scheme as the inter-user channel quality increases.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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