Low-Complexity Hybrid Adaptive Blind Equalization Algorithm for High-Order QAM Signals

作者：Rao, Wei^*; Lu, Changlong; Liu, Yuanyuan; Zhang, Jianqiu

来源：KSII Transactions on Internet and Information Systems, 2016, 10(8): 3772-3790.

DOI：10.3837/tiis.2016.08.019

• Blind Equalization
• Constant Modulus Algorithm
• Inter-Symbol Interference
• Hybrid Algorithm
• Low-Complexity

It is well known that the constant modulus algorithm (CMA) presents a large steady-state mean-square error (MSE) for high-order quadrature amplitude modulation (QAM) signals. In this paper, we propose a low-complexity hybrid adaptive blind equalization algorithm, which augments the CMA error function with a novel constellation matched error (CME) term. The most attractive advantage of the proposed algorithm is that it is computationally simpler than concurrent CMA and soft decision-directed (SDD) scheme (CMA+SDD), and modified CMA (MCMA), while the approximation of steady-state MSE of the proposed algorithm is same with CMA+SDD, and lower than MCMA. Extensive simulations demonstrate the performance of the proposed algorithm.

• 出版日期2016-8-31
• 单位复旦大学; 南昌理工学院; 南昌工程学院; 景德镇陶瓷大学; 中国地质大学（北京）