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| 复值的MBER非线性均衡器用于QAM信号 | |
| 引用本文： | 邬正义,朱仁祥,吴乐南.复值的MBER非线性均衡器用于QAM信号[J].信号处理,2009,25(12). |
| 作者姓名： | 邬正义 朱仁祥 吴乐南 |
| 作者单位： | 1. 常熟理工学院物理与电子工程学院,常熟,215500 2. 宁波工程学院电子与信息工程学院,宁波,315016 3. 东南大学信息科学与工程学院,南京,210096 |
| 基金项目： | 国家自然科学基金，江苏省自然科学基金，国家高技术研究发展计划(863计划) |
| 摘 要： | 本文提出一种复值的最低误码率非线性滤波器用于非线性信道中QAM信号的均衡.推导了针对QAM信号的最低误码率准则训练算法的目标函数,并用Voherra序列来实现复值的非线性均衡器.为使非线性均衡器能在线自适应训练并增加训练算法的数值稳定性,提出～种滑窗随机梯度算法.大量仿真表明,对于非线性信道中QAM信号的均衡,最低误码率非线性均衡器的性能优于最小均方误差准则. |
| 关 键 词： | 非线性均衡器 最低误码率 非线性信道 |
Complex-Valued Minimum Bit Error Rate Nonlinear Equalizers for QAM Signals |
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| Wu Zheng-yi,ZHU Ren-xiang,WU le-nan.Complex-Valued Minimum Bit Error Rate Nonlinear Equalizers for QAM Signals[J].Signal Processing,2009,25(12). | |
| Authors: | Wu Zheng-yi ZHU Ren-xiang WU le-nan |
| Abstract: | A complex-vMued minimum bit error rate(MBER)nonlinear equalizer is proposed for equalization of quadrature-am-plitude modulation (QAM) in nonlinear channels.The MBER objective function for QAM is derived and complex-valued nonlinear equalizers are realized via Voherra series.In order to train the equalizers online and improve robustness of training,a sliding-window stochastic gradient algorithm is proposed.Extensive simulations show that the performance of MBER equalizers is superior to that of minimum mean square error equalizers for QAM in nonlinear channels. |
| Keywords: | QAM nonlinear equalizers minimum bit error rate quadrature-amplitude modulation nonlinear channels |
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