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60-GHz optical/wireless MIMO system integrated with optical subcarrier multiplexing and 2x2 wireless communication
Optics Express
|May 14, 2015
Summary
This study presents a novel 2x2 MIMO OFDM radio-over-fiber system using optical subcarrier multiplexing for high-speed wireless data. The proposed scheme achieves 61.5-Gbits/s transmission with low distortion and error rates.
Area of Science:
- Optoelectronics
- Wireless Communications
- Signal Processing
Background:
- Radio-over-fiber (RoF) systems are crucial for high-bandwidth communication.
- Integrating multiple-input multiple-output (MIMO) and orthogonal frequency-division multiplexing (OFDM) enhances data rates.
- Optical subcarrier multiplexing (OSCM) offers a flexible method for signal transmission.
Purpose of the Study:
- To propose and investigate a 2x2 MIMO OFDM RoF system.
- To utilize OSCM with a dual-parallel Mach-Zehnder modulator (DP-MZM) for signal generation.
- To achieve high-speed wireless transmission in the V-band.
Main Methods:
- Schematic investigation of OSCM principle using a DP-MZM.
- Simulation of combining two MIMO OFDM signals to drive the DP-MZM.
- Application of the Levin-Campello bit-loading algorithm for frequency response compensation.
Main Results:
- PAPR augmentation of less than 0.4 dB, mitigating nonlinear distortion.
- Successful compensation for uneven frequency responses in the V-band.
- Achieved 61.5-Gbits/s OFDM signal rates with a bit error rate (BER) of 10^-3.
Conclusions:
- The proposed 2x2 MIMO OFDM RoF scheme effectively integrates optical and wireless transmission.
- The system demonstrates high data rates and robustness against nonlinear distortion.
- This approach is promising for future high-capacity wireless communication systems.
