Turbulence Mitigation Scheme using MMSE Multiple-user Detection for Orbital Angular Momentum Multiplexing Communications
Turbulence Mitigation Scheme using MMSE Multiple-user Detection for Orbital Angular Momentum Multiplexing Communications
- Author(s): Lu Yang ; Shengmei Zhao ; Li Zou
- DOI: 10.1049/cp.2015.0910
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- Author(s): Lu Yang ; Shengmei Zhao ; Li Zou Source: 6th International Conference on Wireless, Mobile and Multi-Media (ICWMMN 2015), 2015 page ()
- Conference: 6th International Conference on Wireless, Mobile and Multi-Media (ICWMMN 2015)
- DOI: 10.1049/cp.2015.0910
- ISBN: 978-1-78561-046-2
- Location: Beijing, China
- Conference date: 20-23 Nov. 2015
- Format: PDF
A free-space optical (FSO) communications with orbital angular momentum (OAM) multiplexing has largely enhanced the capacity, and atmospheric turbulence (AT) has caused a performance degradation for the system. Among the existed AT mitigation methods, the method with multiple-user detection (MUD) idea is shown to have used the AT interference as a useful component, instead of a noise, to the information detection. However, the random noise, except the AT interference, also has the bad effect on the system performance. In this paper, we propose a AT mitigation method based on Minimum mean square error (MMSE) Multiple-user Detection (MUD) method. The numerical simulation results show that MMSE MUD mitigation method can mitigate the effects of AT and random noise simultaneously. The performance of the OAM-multiplexed communications has been improved using the proposed AT mitigation method.
Inspec keywords: least mean squares methods; interference suppression; atmospheric turbulence; multiplexing; free-space optical communication; multiuser detection; random noise; angular momentum; light interference
Subjects: Free-space optical links; Interpolation and function approximation (numerical analysis); Signal detection; Other topics in statistics
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