A Generalized Bit Error Rate Evaluation for Index Modulation Based OFDM System
A Generalized Bit Error Rate Evaluation for Index Modulation Based OFDM System
复制标题
DOI：
10.1109/access.2020.2972113
复制
发表时间：
2020-01-01
期刊：
影响因子：
3.9
通讯作者：
Hemadeh, Ibrahim A.
中科院分区：
文献类型：
--
作者：
Abdullahi, Mahmoud;Cao, Aijun;Hemadeh, Ibrahim A.
正交频分复用（OFDM-IM）是一种多载波传输技术，其不仅通过M元星座映射将信息比特调制到子载波上，而且还调制到所选择的（活动）子载波索引上。因此，除了M进制符号的误差之外，在OFDM-IM系统索引中还可能出现误差。本文分析了错误的情况下，推导出数学表达式的错误性能的最大似然（ML）检测的基础上。在估计加性白色高斯噪声（AWGN）信道下的误码率（BER）时，提出了一些假设，分析结果表明OFDM-IM系统的BER是指数函数和Q函数的加权和。我们的一般BER表达式已被证明是在良好的协议与数值模拟和证明是准确的，可以作为任何任意大小和配置的OFDM-IM系统的设计和评估的参考。
Orthogonal frequency division multiplexing (OFDM-IM) is a multicarrier transmission technology that modulates information bits not just onto subcarriers by means of M-ary constellation mapping but also onto selected (active) subcarrier indices. Consequently, errors can occur in OFDM-IM systems indices in addition to the errors of M-ary symbols. This paper analyzes the error scenarios and derives mathematical expressions for the error performance based on the maximum likelihood (ML) detection. In evaluating the bit error rate (BER) in the additive white Gaussian noise (AWGN) channel, some assumptions are made and our analytical result show that the BER of OFDM-IM system is a weighted sum of exponential functions and Q-functions. Our general BER expression has been shown to be in excellent agreement with numerical simulation and proven to be accurate and can serve as a reference for the design and evaluation of any arbitrary size and configuration of OFDM-IM systems.