Impact of CSI Uncertainty on MCIK-OFDM: Tight Closed-Form Symbol Error Probability Analysis
Impact of CSI Uncertainty on MCIK-OFDM: Tight Closed-Form Symbol Error Probability Analysis
复制标题
DOI：
10.1109/tvt.2017.2753402
复制
发表时间：
2017-09
影响因子：
6.8
通讯作者：
Thien van Luong;Y. Ko
中科院分区：
文献类型：
--
作者：
Thien van Luong;Y. Ko
本文提出了一种新的框架来分析多载波索引键控正交频分复用 (MCIK-OFDM) 系统的符号错误概率 (SEP)。考虑两种不同类型的检测，例如最大似然（ML）和低复杂度贪婪检测器（GD），我们在存在信道状态信息（CSI）不确定性的情况下推导了 MCIK-OFDM 平均 SEP 的紧闭形式表达式。我们针对三种 CSI 条件进行渐近性能分析，确保全面了解可实现的多样性和编码增益以及各种 CSI 不确定性对 SEP 性能的影响。 ML 和 GD 之间的 SEP 性能比较是在不同 CSI 不确定性下获得的。这有趣地表明，当 $M$ 元调制大小较大时，GD 可以实现近乎最佳的错误性能，甚至在某些 CSI 条件下优于 ML。最后通过仿真结果验证了理论分析和渐近分析，得出的SEP具有较高的精度。
This paper proposes a novel framework to analyze the symbol error probability (SEP) for multicarrier index keying orthogonal frequency-division multiplexing (MCIK-OFDM) systems. Considering two different types of detections such as the maximum likelihood (ML) and low-complexity greedy detectors (GD), we derive tight closed-form expressions for the average SEPs of MCIK-OFDM in the presence of channel state information (CSI) uncertainty. We undertake an asymptotic performance analysis with respect to three CSI conditions, which ensures to provide a comprehensive insight into the achievable diversity and coding gains as well as the impact of various CSI uncertainties on the SEP performance. The SEP performance comparison between the ML and GD is obtained under different CSI uncertainties. This interestingly reveals that the GD can achieve nearly optimal error performance as the $M$ -ary modulation size is large or even outperforms the ML under certain CSI conditions. Finally, the theoretical and asymptotic analysis are verified via simulation results, obtaining the high accuracy of the derived SEP.