New Modified Constant Modulus Algorithm for Underwater Acoustic Communications

摘要：

In digital communications,the modified constant modulus algorithm (MCMA) is known to outperform the constant modulus algorithm (CMA) considerably.However in underwater acoustic communications which occur seriously multipath fading and Doppler frequency shift,the MCMA only achieves moderate convergence rate and steady-state mean square error (MSE).So a new modified constant modulus algorithm is presented which is suitable for high-data-rate underwater acoustic communications.The proposed approach uses a novel constant function to channel the modulus of received signals to match the statistical modulus,which can reduce the incorrect decision and decrease the inter-symbol interference (1SI) more effectively.Compared with MCMA the proposed algorithm has faster convergence rate and lower steady-state MSE.The efficiency of the method is proved by computer simulations in underwater acoustic channels.

关键词： blind equalization modified constant modulus algorithm cost function

作者: Wei Rao Wenqun Tan Yuanmin Li Huijuan Gao

作者单位: Nanchang Institute of Technology Nanchang,China

会议类型: 国际会议

会议名称: 2010 4th International Conference on Intelligent Information Techonlogy Application(第四届智能信息技术应用国际学术研讨会 IITA 2010)

会议地点: 秦皇岛

会议语种:英文

页码: 17-20

在线出版日期: 2010-11-05（万方平台首次上网日期，不代表论文的发表时间）