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Enhanced signal spaces assisted media-based modulation in index modulation-based MIMO networks
Jianrong Huang1, Bitie Lan1, Guowei Li1
1School of Electronic Information and Artificial Intelligence, Wuzhou University, Wuzhou, 543003, China.
Scientific Reports
|October 21, 2025
Summary
This study integrates index modulation (IM) with media-based modulation (MBM) to enhance wireless communication reliability. The proposed ESIM-MBM and ESS-TTAs-MBM schemes significantly improve spectral efficiency and error performance.
Area of Science:
- Wireless Communications
- Signal Processing
- Information Theory
Background:
- Index Modulation (IM) leverages antenna indices (AI) for enhanced data transmission.
- Media-Based Modulation (MBM) utilizes channel indices (CI) for improved communication reliability in scattering environments.
- Existing MIMO-IM systems can benefit from integrated modulation techniques.
Purpose of the Study:
- To investigate the integration of IM and MBM for simultaneous AI and CI information transmission.
- To propose and analyze novel schemes: Extended Space Index Modulation with MBM (ESIM-MBM) and Enhanced Signal Spaces with Two Active Transmit Antennas assisted MBM (ESS-TTAs-MBM).
- To improve spectral efficiency (SE) and error performance in MIMO-IM systems.
Main Methods:
- Developed ESIM-MBM by modulating symbols using AI and CI domains via Kronecker products.
- Proposed ESS-TTAs-MBM by combining QAM constellations for expanded signal spaces and enhanced AI information.
- Analyzed detection complexities using Maximum Likelihood (ML) and formulated theoretical average Bit Error Probability (BEP).
Main Results:
- ESIM-MBM and ESS-TTAs-MBM demonstrate significant improvements in SE and bit error performance compared to existing MBM-based IM schemes.
- Theoretical BEP formulations closely match Monte-Carlo simulation results.
- The proposed schemes show superior performance across various transmit antennas (TAs) and spectral efficiencies (SEs) in high SNR regions.
Conclusions:
- The integration of IM and MBM offers a promising approach for next-generation wireless communications.
- The proposed ESIM-MBM and ESS-TTAs-MBM schemes effectively enhance both spectral efficiency and communication reliability.
- These advanced modulation techniques are vital for future high-performance wireless systems.
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