Subcarrier Allocation for OFDM With Index Modulation

A subcarrier allocation (SA) scheme was demonstrated to provide useful performance improvements for orthogonal frequency division multiplexing (OFDM) systems. Hence, in this letter, we extend its employment to OFDM with index modulation (OFDM-IM) systems. For the sake of improving the bit error rate...

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Bibliographic Details
Published in:IEEE communications letters 2016-07, Vol.20 (7), p.1469-1472
Main Authors: Ma, Qianli, Xiao, Yue, Dan, Lilin, Yang, Ping, Peng, Lan, Li, Shaoqian
Format: Article
Language:English
Subjects:
Algorithms
Allocations
Bit error rate
Channels
Complexity theory
Frequency-domain analysis
Gain
Index modulation
Indexes
Modulation
OFDM
Orthogonal Frequency Division Multiplexing
Performance indices
Resource management
subcarrier allocation
Subcarriers
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Summary:A subcarrier allocation (SA) scheme was demonstrated to provide useful performance improvements for orthogonal frequency division multiplexing (OFDM) systems. Hence, in this letter, we extend its employment to OFDM with index modulation (OFDM-IM) systems. For the sake of improving the bit error rate (BER) performance, an optimal SA algorithm is first proposed by maximizing the average minimum Euclidean distance based on exhaustive search. Furthermore, for striking a better tradeoff between the complexity imposed and the BER performance attained, we propose a simplified SA algorithm by sorting the channel gains of the subcarriers. Simulation results show that with the aid of SA algorithms, significant performance gains can be achieved over conventional OFDM-IM systems.
ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2016.2560171