Dynamic Coded Cooperation Using Multiple Turbo Codes in Wireless Relay Networks
Dynamic Coded Cooperation Using Multiple Turbo Codes in Wireless Relay Networks
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DOI：
10.1109/jstsp.2010.2055036
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发表时间：
2011-02
影响因子：
7.5
通讯作者：
K. Ishibashi;K. Ishii;H. Ochiai
中科院分区：
文献类型：
--
作者：
K. Ishibashi;K. Ishii;H. Ochiai
在本文中，我们提出了一种动态编码合作，使用多个Turbo码在无线中继网络中，中继和目的地都配备了一个传感设备和中继被假定为自主决定，如果它应该合作或不。我们首先阐明的事实，多个Turbo码的打孔模式确定可实现的分集阶数，通过推导其成对错误概率（PEP）。这之后是一个简单的功率检测器在目的地的推导，可以估计一个精确的持续时间的合作阶段解码信息。此外，我们调查的过程延迟的影响，由于认知处理在中继，这导致在分集增益的损失，并提出了一个简单的空填充作为其对策。计算机仿真结果表明，我们提出的方法是能够实现一个完整的多样性和帧错误率（FER）性能上级的传统的合作通信，即使在实际情况下，利用涡轮编码结构。
In this paper, we propose a dynamic coded cooperation using multiple turbo codes in wireless relay networks where both relay and destination are equipped with a sensing device and the relay is assumed to determine autonomously if it should cooperate or not. We first elucidate the fact that the puncturing patterns of the multiple turbo codes determine the achievable diversity order by deriving their pairwise error probabilities (PEP). This is followed by a derivation of a simple power detector at the destination that can estimate a precise duration of cooperation phase upon decoding information. Furthermore, we investigate the impact of process delay due to cognitive processing at the relay, which results in the loss of diversity gain, and propose a simple null padding as its countermeasure. Computer simulations show that our proposed approach is able to achieve a full diversity and the frame error rate (FER) performance superior to that of conventional cooperative communications that make use of turbo coding structure even in practical scenarios.