一种正交结构盲均衡器

根据实际工作中遇到的问题——由载波泄露，调制或解调载波不正交等原因引起的正交干扰，实现了一种正交结构的均衡器。这种正交结构的均衡器在一般均衡器结构的基础上通过增加两个横向滤波器的方法消除正交干扰。采用改进的恒模算法（MCMA）的误差计算方法进行实验，通过观察星座图，代价函数和均方误差的学习曲线，展示了这种正交结构均衡器的性能：除了能像一般均衡器一样消除幅度干扰和相位旋转外，还能消除正交支路间的串扰。

An Efficient Quadrature Structure Blind Equalizer

In this paper, we realize a quadrature structure equalizer to solve the problem occurred in practical work. This quadrature structure equalizer can eliminate the orthogonal interference caused by carrier leak or non-orthogonal- ity of the modulated and demodulated carriers. We adopt Error Calculation Method of Modified Constant Modulus Al- gorithm （MCMA） for simulation to show the quadrature equalizer＇s performance by observing the constellation dia- gram, learning curves of cost function and mean square error （MSE）. With the results we conclude that it can elimi- nate the orthogonal interference between in-phase branch and orthogonal branch, reduce the Inter-Symbol Interfer- ence （ISI）, and avoid phase rotation.