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Opportunistic Interference Alignment for Spectrum Sharing between Radar and Communication Systems.
Dong-Hwan Kim1,2, Janghyuk Youn1, Bang Chul Jung1
1Department of Electronics Engineering, Chungnam National University, Daejeon 34134, Korea.
Sensors (Basel, Switzerland)
|September 3, 2020
Summary
This study introduces opportunistic interference alignment (OIA) for shared radar and cellular systems. The novel technique protects radar detection while enhancing cellular communication sum-rate performance.
Area of Science:
- Wireless communication
- Signal processing
- Radar systems
Background:
- Spectrum sharing between radar and cellular systems presents interference challenges.
- Existing methods like null-space projection offer limited performance.
- Multiple antennas in both systems enable advanced signal manipulation.
Discussion:
- The proposed opportunistic interference alignment (OIA) technique strategically directs radar signals into the cellular base station's interference space.
- Uplink users (UEs) generate beamforming vectors to direct communication signals into the radar receiver's interference space.
- Base stations select UEs to minimize inter-cell interference, optimizing uplink communication.
Key Insights:
- OIA effectively protects radar detection performance.
- Satisfactory sum-rate performance is achieved for the cellular communication system.
- The OIA technique significantly outperforms conventional null-space projection methods.
Outlook:
- Further research can explore adaptive OIA for dynamic environments.
- Investigating OIA in systems with varying numbers of antennas is a potential future direction.
- Real-world implementation and testing of OIA in integrated systems are recommended.
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