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Oblivious Sequential Decode and Forward Cooperative Strategies for the Wireless Relay Channel

机译：无线中继信道的遗忘顺序解码和前向协作策略

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摘要

In a dynamic wireless network where a source terminal communicates with a destination, in presence of other users in the network, it is worthwhile to consider oblivious relaying strategies of a relay in close proximity to the source transmitter. The source-relay channel is assumed to be a fixed gain additive white Gaussian noise (AWGN) channel due to source-relay colocation. The source-destination and the relay-destination transmissions are subject to block flat fading dynamics. A perfect channel state information (CSI) at the respective receivers only is assumed. With the expected throughput as a performance measure, we incorporate a two-layer broadcast approach into a cooperative strategy based on the decode-and-forward scheme - Sequential Decode-and Forward (SDF). The broadcast approach splits the transmitted rate into superimposed layers, corresponding to a "bad" and a "good" channel states, allowing better adaptation to the actual channel conditions. The achievable rate expressions for the SDF strategy are derived under the broadcast approach for multiple settings including single user, multiple-input single-output (MISO) and the general relay setting using successive decoding technique, both numerically and analytically. Continuous broadcasting lower bounds are derived for the MISO and for the oblivious cooperation scenarios.
机译：在源终端与目的地通信的动态无线网络中，在网络中存在其他用户的情况下，值得考虑的是紧邻源发射机的中继器的遗忘中继策略。由于源-中继共置，假设源-中继信道是固定增益加性高斯白噪声（AWGN）信道。源-目的地和中继-目的地传输经受块平坦衰落动态。仅假设在各个接收器处的理想信道状态信息（CSI）。以预期的吞吐量作为一种性能指标，我们在解码和转发方案-顺序解码和转发（SDF）的基础上，将两层广播方法纳入了合作策略。广播方法将传输速率分为对应于“不良”和“良好”信道状态的叠加层，从而允许更好地适应实际信道条件。 SDF策略可实现的速率表达式是在广播方法下通过数值和解析的连续解码技术针对多个设置（包括单用户，多输入单输出（MISO）和常规中继设置）导出的。为MISO和遗忘的合作方案得出了连续广播的下界。

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