In this work, we propose a novel partial compress-and-forward (PCF) scheme for improving the maximum achievable transmission rate of a diamond relay network with two noisy relays. PCF combines conventional compress-and-forward (CF) and amplify-and-forward (AF) protocols, enabling one relay to operate alternately in the CF or the AF mode, while the other relay works purely in the CF mode. As the direct link from the source to the destination is unavailable, and there is no noiseless relay in the diamond network, messages received from both relays must act as side information for each other and must be decoded jointly. We propose a joint decoder to decode two Luby transform (LT) codes received from both relays corresponding to the same original message. Numerical results show that PCF can achieve significant performance improvements compared to decode-and-forward (DF) and pure CF protocols when at least the channels connected to one of the relays are of high quality.

翻译：本文提出了一种新颖的部分压缩转发（PCF）方案，用于提升包含两个噪声中继的钻石中继网络的最大可达传输速率。PCF 结合了传统压缩转发（CF）与放大转发（AF）协议，使一个中继能够交替工作在CF或AF模式，而另一个中继则纯以CF模式运行。由于源节点至目的节点的直接链路不可用，且钻石网络中不存在无噪声中继，因此两个中继接收到的消息必须互为边信息并进行联合解码。我们提出了一种联合解码器，用于解码从两个中继接收到的、对应同一原始消息的两个Luby变换（LT）码。数值结果表明，当至少连接其中一个中继的信道质量较高时，PCF相较于解码转发（DF）与纯CF协议能够实现显著的性能提升。