Performance enhancement and PAPR reduction for MIMO based QAM-FBMC systems
1Department of Electrical Engineering, College of Engineering, Jazan University, Jizan, Saudi Arabia.
Plos One
|January 11, 2024
Summary
This study introduces a novel method to reduce the high Peak-to-Average Power Ratio (PAPR) in Filter Bank Multi-Carrier (FBMC) systems with Multiple-Input and Multiple-Output (MIMO) antennas. The technique enhances system performance and throughput for future wireless communications.
Area of Science:
- Wireless Communications
- Signal Processing
Background:
- Filter Bank Multi-Carrier (FBMC) is a promising multi-carrier modulation (MCM) technique for future communication systems, offering advantages over Orthogonal Frequency Division Multiplexing (OFDM).
- FBMC systems, especially when combined with Multiple-Input and Multiple-Output (MIMO) and Quadrature Amplitude Modulation (QAM), face significant challenges with high Peak-to-Average Power Ratio (PAPR), leading to nonlinear power amplifier inefficiencies.
- High PAPR necessitates increased Input Backoff (IBO), reducing power efficiency and limiting coverage, particularly when employing beamforming for enhanced system performance.
Purpose of the Study:
- To analyze the performance of MIMO-based QAM-FBMC systems, considering system complexity and interference.
- To propose and evaluate a new PAPR reduction method for MIMO-based QAM-FBMC systems to improve efficiency and coverage.
- To demonstrate the effectiveness of the proposed method in enhancing both PAPR and throughput compared to existing techniques.
Main Methods:
- Performance analysis of MIMO-based QAM-FBMC systems, evaluating complexity and interference.
- Development of a novel PAPR reduction technique leveraging the MIMO channel's null space using clipping and filtering (CF).
- Mapping PAPR-reduced signals to the null space of the MIMO channel for each frequency block and simulation using a nonlinear power amplifier model.
Main Results:
- The proposed clipping and filtering (CF) technique effectively reduces PAPR in MIMO-based QAM-FBMC systems.
- The method successfully maps PAPR-reduced signals into the null space of the MIMO channel, mitigating interference.
- Computer simulations demonstrate substantial improvements in both PAPR and throughput compared to conventional methods.
Conclusions:
- The proposed PAPR reduction method significantly enhances the performance of MIMO-based QAM-FBMC systems.
- This technique is crucial for improving power efficiency and extending coverage in future wireless communication systems utilizing FBMC and MIMO.
- The method offers a practical solution for overcoming PAPR challenges in advanced multi-carrier modulation schemes.
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