Space Shift Keying (SSK) Modulation with Partial Channel State Information: Optimal Detector and Performance Analysis over Fading Channels
Space Shift Keying (SSK) Modulation with Partial Channel State Information: Optimal Detector and Performance Analysis over Fading Channels
复制标题
DOI：
10.1109/tcomm.2010.091710.090598
复制
发表时间：
2010-11-01
影响因子：
8.3
通讯作者：
Haas, Harald
中科院分区：
文献类型：
--
作者：
Di Renzo, Marco;Haas, Harald
空移键控 (SSK) 调制是最近提出的一种用于多输入多输出 (MIMO) 无线系统的新型传输技术，已被证明是几种最先进 MIMO 方案的一种有前途的低复杂性替代方案。到目前为止，仅研究了接收器处具有全信道状态信息 (F-CSI) 的最优或启发式收发器，并分析了它们在衰落信道上的性能。在本文中，我们开发并研究了接收器处具有未知相位参考（即部分 CSI、P-CSI、知识）的最佳最大似然 (ML) 检测器的性能。提出了一种非常准确的分析框架，用于在一般相关和非同分布的 Nakagami-m 衰落信道上分析和优化这种新颖的检测器，并将其性能与 F-CSI 的最佳接收机设计进行比较。数值结果将指出：i）SSK调制的性能受到衰落信道特性的显着影响，例如。例如，信道相关性、衰落严重性，特别是发射-接收无线链路之间的功率不平衡，以及 ii) 与普通调制方案不同，当接收器无法利用相位信息进行最佳接收器设计时，会出现显着的性能损失。后一个结果凸显了准确可靠的信道估计机制对于衰落信道上 SSK 调制的有效操作的重要性。分析框架和理论结果也将通过蒙特卡罗模拟得到证实。
Space Shift Keying (SSK) modulation is a new and recently proposed transmission technology for Multiple-Input-Multiple-Output (MIMO) wireless systems, which has been shown to be a promising low-complexity alternative to several state-of-the-art MIMO schemes. So far, only optimal or heuristic transceivers with Full Channel State Information (F-CSI) at the receiver have been investigated, and their performance analyzed over fading channels. In this paper, we develop and study the performance of the optimal Maximum-Likelihood (ML) detector with unknown phase reference at the receiver (i.e., Partial-CSI, P-CSI, knowledge). A very accurate analytical framework for the analysis and optimization of this novel detector over generically correlated and non-identically distributed Nakagami-m fading channels is proposed, and its performance compared to the optimal receiver design with F-CSI. Numerical results will point out that: i) the performance of SSK modulation is significantly affected by the characteristics of fading channels, e. g., channel correlation, fading severity, and, particularly, power imbalance among the transmit-receive wireless links, and ii) unlike ordinary modulation schemes, there is a substantial performance loss when the receiver cannot exploit the phase information for optimal receiver design. This latter result highlights the importance of accurate and reliable channel estimation mechanisms for the efficient operation of SSK modulation over fading channels. Analytical frameworks and theoretical findings will also be substantiated via Monte Carlo simulations.