摘要
针对数字无线通信中高功率放大器的非线性失真,提出了一种Volterra滤波均衡器的设计方法--阶逆算法,即对原有的Volterra级数模型进行求逆的过程。而根据该均衡器所处的位置又可以分为阶逆前向均衡和阶逆后向均衡,并对阶逆前向均衡的结构和算法进行了研究。计算机模拟结果表明,采用该算法系统输出误码率大为降低,整个系统性能具有明显的改善,且计算量小,可实现性强。
For the increase of nonlinear inter-symbol interference due to the amplifier nonlinearities, we propose the theory of th-order inverse based on discrete-time Vulterra equa/ization, i.e., th-order inverse approach, which is just a process to seek inverse for the Volterra series representation. Based on the position of equalizer, it may be divided into such two kinds as the th-order predistorter and th-order postdistorter. We introduce the structure and algorithm of th-order predistorter. The computer simulation results show that the application of this algorithm system can gready reduce the BER, improve obviously the system performance, decrease the computation quantity and enhance the implementation capability.
出处
《计算机与网络》
2009年第1期49-50,54,共3页
Computer & Network
