基于空间分集的判决反馈结构联合盲均衡算法  

Joint Blind Equalization Algorithm Based on Decision Feedback Equalizer with Spatial Diversity

作　　者：赵秋明[1] 陈秋良[1] 龚金忠[1] 

机构地区：[1]桂林电子科技大学,广西桂林541004

出　　处：《电视技术》2013年第11期151-154,共4页Video Engineering

基　　金：广西无线宽带通信与信号处理重点实验室主任基金项目(10913)

摘　　要：以QAM信号为对象,研究提高信号盲自适应均衡性能的算法,该算法利用联合MCMA+DD的误差函数并结合分集合并技术运用到非线性结构的判决反馈均衡器中,形成一种混合盲算法来均衡QAM信号。混合算法中同时利用两误差函数对系数进行更新以提高QAM信号的均衡适应能力,利用空间分集减少衰落的影响和利用非线性结构适应频响起伏大的信道。从仿真结果看,与其他算法相比,该混合算法加快了收敛速度,减小了稳态误差,并且纠正了相位旋转,有效性得到验证。Targeting QAM signals, improving the performance of blind adaptive equalization algorithm is researched, which using error functions of the joint MCMA＋DD, and taking into account the diversity combining technique applied in nonlinear decision feedback equalizer structure in order to form a hybrid blind algorithm for QAM signals. The hybrid algorithm employs both the error functions to update the coefficients to improve the QAM signal equalization adaptability and utilizes spatial diversity for reducing fading effect and uses nonlinear structural for large fluctuation of frequency response of the channel. Computer simulations show the algorithm can increase the rate of convergence and reduce steady-state error and be able to compensate carrier phase rotation. Thus the simulation results prove the feasibility of the hybrid algorithm.

关 键 词：盲均衡 判决反馈均衡器 联合MCMA+DD 空间分集 QAM 

分 类 号：TN914.3[电子电信—通信与信息系统]