Optimization of pilot pattern in ACO-OFDM systems channel estimation based on compressed sensing

Qingsong Zhao; Shiqi Hao; Yong Wang; Jingnan Wang; Xiongfeng Wan; Chenlu Xu

doi:10.1117/12.2520727

14 February 2019 Optimization of pilot pattern in ACO-OFDM systems channel estimation based on compressed sensing

Qingsong Zhao, Shiqi Hao, Yong Wang, Jingnan Wang, Xiongfeng Wan, Chenlu Xu

Proceedings Volume 11048, 17th International Conference on Optical Communications and Networks (ICOCN2018); 110481B (2019) https://doi.org/10.1117/12.2520727
Event: 17th International Conference on Optical Communications and Networks (ICOCN2018), 2018, Zhuhai, China

Abstract

The application of asymmetrically clipped optical-orthogonal frequency division multiplexing (ACO-OFDM) in free-space optical (FSO) communication system can increase the system channel capacity, while the use of channel estimation technology can ensure that ACO-OFDM has better performance. Since the channel estimation performance is directly affected by the selection of pilot patterns, especially when using compressed sensing (CS), it has been a major task in OFDM transmission schemes. In order to improve the channel reconstruction accuracy, a hybrid optimization algorithm based on genetic algorithm (GA) and particle swarm optimization (PSO) algorithm is proposed for two types of pilot design criterion. Simulation results show that compared with other three algorithms, the proposed algorithm has faster convergence speed and lower convergence value. With the pilots designed by the proposed algorithm, the system can achieve higher channel reconstruction accuracy.

Citation Download Citation

Qingsong Zhao, Shiqi Hao, Yong Wang, Jingnan Wang, Xiongfeng Wan, and Chenlu Xu "Optimization of pilot pattern in ACO-OFDM systems channel estimation based on compressed sensing", Proc. SPIE 11048, 17th International Conference on Optical Communications and Networks (ICOCN2018), 110481B (14 February 2019); https://doi.org/10.1117/12.2520727

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