A Wireless Channel Equalization Method Based on Hybrid Whale Optimization: For Constant Modulus Blind Equalization System

Xiaolin Wang, Liyi Zhang, Yunshan Sun, Yong Zhang () and Yongsheng Hu
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Xiaolin Wang: School of Information Engineering, Tianjin University of Commerce, Tianjin 300134, China
Liyi Zhang: School of Information Engineering, Tianjin University of Commerce, Tianjin 300134, China
Yunshan Sun: School of Information Engineering, Tianjin University of Commerce, Tianjin 300134, China
Yong Zhang: School of Information Engineering, Tianjin University of Commerce, Tianjin 300134, China
Yongsheng Hu: School of Information Engineering, Tianjin University of Commerce, Tianjin 300134, China

Mathematics, 2023, vol. 11, issue 15, 1-23

Abstract: This paper proposes a wireless channel equalization method applied to the constant modulus blind equalization system, which addresses the slow convergence and strong randomness in the initialization of equalizer weights in the constant modulus blind equalization algorithm (CMA) by introducing a hybrid arithmetic whale optimization algorithm (HAWOA). The mean square error in the CMA is utilized as the cost function for the HAWOA to obtain a more effective initial weights for the equalizer. To validate the superiority of the hybrid arithmetic whale constant modulus blind equalization algorithm, tests are conducted on the equalization system using 16QAM and 64QAM signals. The simulation results demonstrate that the proposed algorithm achieved better initial weights compared to the CMA and the constant modulus blind equalization algorithm based on the whale optimization algorithm. It can obtain the desired mean square error with a lower symbol error rate in fewer iterations. Furthermore, the hybrid arithmetic whale constant modulus blind equalization algorithm exhibited faster convergence in optimizing initial weights, effectively enhancing the equalization performance of the CMA in wireless channels while ensuring timeliness.

Keywords: constant modulus blind equalization; hybrid arithmetic; whale optimization algorithm; initial weight; mean square error (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2023
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