基于子载波补给索引调制的OFDM传输方案

doi:10.11959/j.issn.1000-436x.2023030

Abstract

Abstract:

To address the drawback that subcarrier activation pattern (SAP) of the orthogonal frequency division multiplexing with index modulation (OFDM-IM) cannot match the binary numbers which affects the system performance, the orthogonal frequency division multiplexing with subcarrier supply index modulation (OFDM-SSIM) transmission scheme was proposed.The index utilization of the system was improved and the spectral efficiency (SE) of the system was enhanced by adding the supply index.Also, as the subcarrier activation pattern of the proposed scheme match the binary numbers, low complexity log-likelihood ratio (LLR) detection was made easy to adopt and bit error rate (BER) performance was maintained good.Theoretical analysis and simulation results show that the proposed scheme effectively improves the SE and BER performance over classical OFDM-IM scheme in additive white Gaussian noise (AWGN) channels and Rayleigh fading channels.

Key words: index modulation, orthogonal frequency division multiplexing, spectral efficiency, log-likelihood ratio

CLC Number:

TN929.1

Yi GUO, Yiqing WANG, Yuanyuan FAN, Gang LIU. OFDM transmission scheme with subcarrier supply index modulation[J]. Journal on Communications, 2023, 44(2): 104-111.

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References ［14］

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索引模式	映射模式	索引信息	SAP
		000	［1,2］
		001	［2,3］
原始索引	M₁={-1,1}	010	［3,4］
		011	［1,4］
		100	［1,3］
		101	［2,4］
补给索引	M₂={-i,i}	110	［1,2］
		111	［2,3］

方案	SE/(bit·(s·Hz)^-1)
OFDM-SSIM	1.25
OFDM-IM	1.00
ZTM-OFDM-IM	1.25

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OFDM transmission scheme with subcarrier supply index modulation

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