Coded cooperation in wireless communications: space-time transmission and iterative decoding
Coded cooperation in wireless communications: space-time transmission and iterative decoding
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DOI：
10.1109/tsp.2003.821100
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发表时间：
2004-02
影响因子：
5.4
通讯作者：
M. Janani;A. Hedayat;T. E. Hunter;Aria Nosratinia
中科院分区：
文献类型：
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作者：
M. Janani;A. Hedayat;T. E. Hunter;Aria Nosratinia
当移动设备由于尺寸或其他限制而不能支持多个天线时，传统的空时编码不能用于提供上行链路发射分集。为了解决这一限制，引入了协作分集的概念，其中移动设备通过中继彼此的消息来实现上行链路传输分集。这一原则的一个特别强大的变体是编码合作。编码协作不是简单的重复中继，而是划分每个移动台的码字并通过独立的衰落信道发送每个码字的部分。本文提出了编码合作框架的两个扩展。首先，我们借鉴时空编码的思想，增加了快速衰落场景中编码合作的多样性。我们计算误码率和误块率的界限，以证明所产生的增益。其次，由于协作编码包含两个代码组件，因此很自然地将turbo码应用于该框架。我们研究了 Turbo 码在编码协作中的应用，并通过错误界限和模拟演示了由此产生的增益。
When mobiles cannot support multiple antennas due to size or other constraints, conventional space-time coding cannot be used to provide uplink transmit diversity. To address this limitation, the concept of cooperation diversity has been introduced, where mobiles achieve uplink transmit diversity by relaying each other's messages. A particularly powerful variation of this principle is coded cooperation. Instead of a simple repetition relay, coded cooperation partitions the codewords of each mobile and transmits portions of each codeword through independent fading channels. This paper presents two extensions to the coded cooperation framework. First, we increase the diversity of coded cooperation in the fast-fading scenario via ideas borrowed from space-time codes. We calculate bounds for the bit- and block-error rates to demonstrate the resulting gains. Second, since cooperative coding contains two code components, it is natural to apply turbo codes to this framework. We investigate the application of turbo codes in coded cooperation and demonstrate the resulting gains via error bounds and simulations.