Index Modulation Assisted DCT-OFDM with Enhanced Transceiver Design
Index Modulation Assisted DCT-OFDM with Enhanced Transceiver Design
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DOI：
10.1109/icc.2019.8761474
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发表时间：
2019-05
期刊：
影响因子：
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通讯作者：
Chang He;Aijun Cao;Lixia Xiao;Lei Zhang;P. Xiao;K. Nikitopoulos
中科院分区：
文献类型：
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作者：
Chang He;Aijun Cao;Lixia Xiao;Lei Zhang;P. Xiao;K. Nikitopoulos
提出了一种基于指数调制（IM）辅助离散余弦变换的增强发射机设计正交频分复用（DCT-OFDM -IM）方法。它融合了离散余弦变换辅助正交频分复用（DCT-OFDM）和索引调制（IM）的概念，利用了相同带宽下可用子载波数加倍所提供的设计自由度。在提出的EDCT-OFDM-IM方案中，推导了用于符号位和索引位恢复的最大似然检测器，并给出了EDCT-OFDM-IM的复杂设计准则。在此基础上，给出了EDCT-OFDM-IM在多径衰落信道下的平均误码率（ABEP）的理论上界。此外，推导了EDCT-OFDM-IM方案的最大峰均功率比（PAPR），并与基于离散傅里叶变换（DFT）的OFDM-IM方案进行了比较。
An index modulation (IM) assisted Discrete Cosine Transform based Orthogonal Frequency Division Multiplexing (DCT-OFDM) with Enhanced Transmitter Design (termed as EDCT-OFDM-IM) is proposed. It amalgamates the concept of Discrete Cosine Transform assisted Orthogonal Frequency Division Multiplexing (DCT-OFDM) and Index Modulation (IM) to exploit the design freedom provided by the double number of available subcarrier under the same bandwidth. In the proposed EDCT-OFDM-IM scheme, the maximum likelihood (ML) detector used for symbol bits and index bits recovering is derived and the sophisticated designing guidelines for EDCT-OFDM-IM are provided. Based on the derived pairwise error event probability, a theoretical upper bound on the average bit-error probability (ABEP) of EDCT-OFDM-IM is provided over multipath fading channels. Furthermore, the maximum peak-to-average power ratio (PAPR) of our proposed EDCT-OFDM-IM scheme is derived and compared to than the general Discrete Fourier Transform (DFT) based OFDM-IM counterpart.