Space Shift Keying (SSK) is a multiple-input multiple-output technique that has drawn more attention in recent years because of its low complex transceiver design. In this paper, an investigation on the Symbol Error Probability (SEP) performance of SSK in a Decode-and-Forward (DF) cooperative relaying system is done. The DF cooperative relaying scenario considers an origin node, an intermediate node and an end node with a direct link between origin and end node, and an indirect link between origin to the intermediate node and intermediate to end node. The SSK modulation is considered at the origin and intermediate nodes with Full Euclidean Distance based Selection Combining (FED-SC) employed at the end node for SSK symbol detection. The SEP expression of the SSK FED-SC in the DF cooperative relaying scheme is derived using the Order Statistics Approach (OSA). Further, a closed-form SEP expression is obtained using a Combined Order Statistics Approach (COSA) considering the number of receive antennas at the intermediate node is equal to the number of receive antennas at the end node. In addition, the closed-form asymptotic SEP expression is presented to evaluate the diversity order of the system. The SEP expressions derived through OSA and COSA are verified using the Monte Carlo simulations. The simulation results revealed that the proposed SSK FED-SC outperforms all the existing SSK DF cooperative selection combining schemes.

中文翻译：

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SSK DF 协作分集系统的全欧氏距离选择组合


空间移位键控（SSK）是一种多输入多输出技术，近年来因其低复杂度的收发器设计而受到越来越多的关注。本文对解码转发（DF）协作中继系统中 SSK 的符号错误概率（SEP）性能进行了研究。 DF协作中继场景考虑源节点、中间节点和端节点，源节点和端节点之间有直接链路，源节点到中间节点和中间节点到端节点之间有间接链路。在起始节点和中间节点考虑 SSK 调制，并在终端节点采用基于全欧几里德距离的选择组合 (FED-SC) 进行 SSK 符号检测。 DF协作中继方案中SSK FED-SC的SEP表达式是使用阶次统计方法(OSA)导出的。此外，考虑到中间节点处的接收天线的数量等于端节点处的接收天线的数量，使用组合阶统计方法(COSA)来获得封闭形式的SEP表达式。此外，还提出了闭式渐近SEP表达式来评估系统的多样性阶。通过 OSA 和 COSA 导出的 SEP 表达式使用蒙特卡罗模拟进行验证。仿真结果表明，所提出的 SSK FED-SC 优于所有现有的 SSK DF 协作选择组合方案。