Lexicographic Codebook Design for OFDM With Index Modulation

In this paper, we propose a novel codebook design scheme for orthogonal frequency-division multiplexing with index modulation (OFDM-IM) to improve system performance. The optimization process can be implemented efficiently by the lexicographic ordering principle. By applying the proposed codebook de...

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Bibliographic Details
Published in:IEEE transactions on wireless communications Vol. 17; no. 12; pp. 8373 - 8387
Main Authors: Shuping Dang, Gaojie Chen, Coon, Justin P.
Format: Journal Article
Language:English
Published: New York IEEE 01.12.2018
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Bit error rate
Complexity
Computer simulation
diversity gain
diversity-rate optimization
Error analysis
error performance analysis
Frequency division multiplexing
genetic algorithm
Genetic algorithms
Modulation
OFDM
Optimization
Orthogonal Frequency Division Multiplexing
Orthogonal frequency-division multiplexing with index modulation (OFDM-IM)
Subcarriers
Wireless communication
ISSN:1536-1276, 1558-2248
Online Access:Get full text
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Summary:In this paper, we propose a novel codebook design scheme for orthogonal frequency-division multiplexing with index modulation (OFDM-IM) to improve system performance. The optimization process can be implemented efficiently by the lexicographic ordering principle. By applying the proposed codebook design, all subcarrier activation patterns with a fixed number of active subcarriers will be explored. Furthermore, as the number of active subcarriers is fixed, the computational complexity for estimation at the receiver is reduced and the zero-active subcarrier dilemma is solved without involving complex higher layer transmission protocols. It is found that the codebook design can potentially provide a tradeoff between diversity and transmission rate. We investigate the diversity mechanism and formulate three diversity-rate optimization problems for the proposed OFDM-IM system. Based on the genetic algorithm, the method of solving these formulated optimization problems is provided and verified to be effective. Then, we analyze the average block error rate and bit error rate of the OFDM-IM systems applying the codebook design. Finally, all analyses are numerically verified by the Monte Carlo simulations. In addition, a series of comparisons are provided, by which the superiority of the codebook design is confirmed.
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ISSN:1536-1276
1558-2248
DOI:10.1109/TWC.2018.2876821