A Hybrid Mapping Scheme to Improve Bit Error Rate Performance of Orthogonal Frequency Division Multiplexing with Index Modulation System

ZHU Yongjia; HE Yuyao; YAO Rugui; FAN Ye

doi:10.11999/JEIT220436

Volume 45 Issue 5

May 2023

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ZHU Yongjia, HE Yuyao, YAO Rugui, FAN Ye. A Hybrid Mapping Scheme to Improve Bit Error Rate Performance of Orthogonal Frequency Division Multiplexing with Index Modulation System[J]. Journal of Electronics & Information Technology, 2023, 45(5): 1660-1668. doi: 10.11999/JEIT220436

Citation:

ZHU Yongjia, HE Yuyao, YAO Rugui, FAN Ye. A Hybrid Mapping Scheme to Improve Bit Error Rate Performance of Orthogonal Frequency Division Multiplexing with Index Modulation System[J]. Journal of Electronics & Information Technology, 2023, 45(5): 1660-1668. doi: 10.11999/JEIT220436

Citation:

ZHU Yongjia, HE Yuyao, YAO Rugui, FAN Ye. A Hybrid Mapping Scheme to Improve Bit Error Rate Performance of Orthogonal Frequency Division Multiplexing with Index Modulation System[J]. Journal of Electronics & Information Technology, 2023, 45(5): 1660-1668. doi: 10.11999/JEIT220436

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A Hybrid Mapping Scheme to Improve Bit Error Rate Performance of Orthogonal Frequency Division Multiplexing with Index Modulation System

doi: 10.11999/JEIT220436

ZHU Yongjia¹,
HE Yuyao¹,
YAO Rugui^{2
,
,},
FAN Ye²

1.
School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an 710072, China
2.
School of Electronics and Information, Northwestern Polytechnical University, Xi’an 710129, China

Funds: The National Natural Science Foundation of China (61871327), The Natural Science Foundation of Shaanxi Province (2022JQ-637)

Received Date: 2022-04-13
Rev Recd Date: 2022-09-02

Available Online: 2022-09-06

Publish Date: 2023-05-10

Abstract

Abstract

A hybrid mapping scheme is proposed in this paper to improve further the Bit Error Rate (BER) performance of Orthogonal Frequency Division Multiplexing with Index Modulation (OFDM-IM) system for high Signal-to-Noise Ratio (SNR). By taking advantage of the fact that the BER of index bits is lower than that of data bits in the high SNR region, the scheme uses two allocation strategies of index bits with different numbers, which increases the proportion of index bits. Correspondingly, the Subcarrier Activation Patterns (SAPs) are divided into super SAPs and normal SAPs. Compared with normal SAPs, super SAPs have seen increased index bits and decreased data bits by 1 bit respectively. The decreased data bits corresponding to a super SAP are supplemented with a parity-check bit and then mapped into symbols, which improves the diversity order of OFDM-IM system and increases the minimum Euclidean distance between symbols. The simulation results show that, compared with the previous mapping scheme, the hybrid mapping scheme can gain about 1～3 dB when BER is 10^–4, and improve effectively the BER performance of OFDM-IM system.
- Index modulation,
- Orthogonal Frequency Division Multiplexing (OFDM),
- Mapping scheme,
- Diversity order,
- Euclidean distance

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References(16)

References

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