MBER优化用于宽带功放通信系统

• 作 者: 楼建明 朱仁祥 郑悠 钟秋波
• 机 构: 宁波工程学院电子与信息工程学院,哈尔滨工业大学机器人技术与系统国家重点实验室,
• 出 处: 北京邮电大学学报
• 发表日期: 2016年06期
• 关键词: 失真器 线性失真 优化算法 最小差错概率 通信系统 MBER 误码率性能 仿真结果 带外 线性均衡

针对通信系统中宽带功率放大器引起的非线性失真问题,提出了最小差错概率(MBER)算法,以优化非线性均衡器参数,并采用非线性均衡器与数字预失真器对功率放大器非线性失真进行联合补偿.预失真用于减少非线性失真对带外的干扰,非线性均衡器用于减少带内失真.仿真结果表明,基于MBER算法的非线性均衡器性能优于基于最小均方误差算法的均衡器;联合线性化简化了预失真器的结构,并可获得更优的误码率性能.

Aimed at the problem of nonlinear distortion caused by wideband power amplifier in communication system, a minimum error probability (MBER) algorithm is proposed to optimize the parameters of the nonlinear equalizer. The non-linear equalizer and the digital predistorter are used to compensate the nonlinear distortion of the power amplifier The pre-distortion is used to reduce the out-of-band interference of nonlinear distortion, and the nonlinear equalizer is used to reduce the in-band distortion.The simulation results show that the performance of the nonlinear equalizer based on the MBER algorithm is better than that based on the minimum mean square error algorithm The joint linearization simplifies the structure of the predistorter and achieves better bit error rate performance.