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Multiple Modulus Blind Equalization Algorithms for High-Order QAM System |
Dou Gao-qi; Gao Jun |
Department of Communication Engineering, Naval University of Engineering, Wuhan 430033, China |
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Abstract In this paper, two multiple modulus algorithms(MMA+SDD and SMMA+SDD) are proposed based on the characteristic of the QAM signals, which overcome CMA’s larger residual error and recover the rotation of the phase at the same time. Computer simulations show that the proposed algorithms lead to faster convergence rates and lower steady-state Mean Square Error(MSE) after convergence compared with the concurrent CMA and SDD algorithm. The MMA+SDD has the best performance and the SMMA+SDD has the least complexity among the three algorithms.
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Received: 07 August 2006
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