A General Framework for Performance Analysis of Space Shift Keying (SSK) Modulation for MISO Correlated Nakagami-m Fading Channels
A General Framework for Performance Analysis of Space Shift Keying (SSK) Modulation for MISO Correlated Nakagami-m Fading Channels
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DOI：
10.1109/tcomm.2010.09.090565
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发表时间：
2010-09
影响因子：
8.3
通讯作者：
M. Renzo;H. Haas
中科院分区：
文献类型：
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作者：
M. Renzo;H. Haas
在本文中，我们提供了一个准确的框架，用于分析无线通信系统的性能，采用最近提出的空间移位键控（SSK）调制方案。更具体地说，我们研究了Nt × 1 MISO（多输入单输出）系统设置与最大似然（ML）检测和完整的信道状态信息（CSI）在接收机的性能。当Nt=2时，精确的平均误比特概率（ABEP）在一般相关和非相同分布的Nakagami-m衰落信道上以封闭形式计算，而当Nt > 2时，非常精确和渐近紧的上界被提出来计算ABEP。关于目前的文献，我们的贡献是三方面的：i）以封闭形式计算ABEP，而不诉诸蒙特卡罗数值模拟，除了计算密集之外，其仅产生关于系统性能的有限见解并且不能用于系统优化，ii）该框架考虑任意衰落条件并且不限于相同分布的衰落信道，从而提供了对SSK调制在广义衰落信道上的性能的全面理解，以及iii）由于Nakagami-m分布是一种非常灵活的衰落模型，其包括或可以紧密地近似几个其他衰落模型，因此该分析框架可以容易地适于研究具有任意衰落分布的广义衰落信道上的性能。数值结果表明，SSK调制的性能受到衰落信道特性的显著影响，Nt个发射-接收无线链路之间的信道相关性、衰落严重性和功率不平衡。分析框架和理论研究结果也证实通过蒙特卡罗模拟。
In this paper, we offer an accurate framework for analyzing the performance of wireless communication systems adopting the recently proposed Space Shift Keying (SSK) modulation scheme. More specifically, we study the performance of a Nt x 1 MISO (Multiple-Input-Single-Output) system setup with Maximum-Likelihood (ML) detection and full Channel State Information (CSI) at the receiver. The exact Average Bit Error Probability (ABEP) over generically correlated and non-identically distributed Nakagami-m fading channels is computed in closed-form when Nt=2, while very accurate and asymptotically tight upper bounds are proposed to compute the ABEP when Nt > 2. With respect to current literature, our contribution is threefold: i) the ABEP is computed in closed-form without resorting to Monte Carlo numerical simulations, which, besides being computationally intensive, only yield limited insights about the system performance and cannot be exploited for a systematic optimization of it, ii) the framework accounts for arbitrary fading conditions and is not restricted to identically distributed fading channels, thus offering a comprehensive understanding of the performance of SSK modulation over generalized fading channels, and iii) the analytical framework could be readily adapted to study the performance over generalized fading channels with arbitrary fading distributions, since the Nakagami-m distribution is a very flexible fading model, which either includes or can closely approximate several other fading models. Numerical results show that the performance of SSK modulation is significantly affected by the characteristics of fading channels, {e.g.}, channel correlation, fading severity, and power imbalance among the Nt transmit-receive wireless links. Analytical frameworks and theoretical findings are also substantiated via Monte Carlo simulations.