论文部分内容阅读
本文给出一种基于混合滑动——指数窗递归最小二乘(SEWRLS)算法的自适应判决反馈均衡器(ADFE)。SEWRLS ADFE具有滑动矩形窗RLS(SRWRLS)ADFE的快速跟踪特性,而稳态性能比SRWRLS ADFE要好得多。文中导出了SEWRLS ADFE算法。在讨论了数字蜂窝移动通信信道特性后,绐出一种多径Rayleigh衰落信道模型,在所考虑的信道模型上,分别对SEWRLS、EWRLS(指数窗RLS)、SRWRLS、LMS ADFE及RLS线性均衡器(RLS LE)的均方误差特性、误码率——信噪比及误码率——归一化时延特性进行了计算机模拟比较研究,结果表明,SEWRLS ADFE比其它均衡器有更优良的性能。
This paper presents an adaptive decision feedback equalizer (ADFE) based on hybrid sliding-index window recursive least squares (SEWRLS) algorithm. SEWRLS ADFE has the fast tracking feature of a sliding rectangular window RLS (SRWRLS) ADFE, and the steady-state performance is much better than SRWRLS ADFE. In this paper, the SEWRLS ADFE algorithm is derived. After discussing the channel characteristics of digital cellular mobile communication, a multi-path Rayleigh fading channel model is proposed. The proposed channel models for SEWRLS, EWRLS (exponential window RLS), SRWRLS, LMS ADFE and RLS linear equalizer (RLS LE) mean square error characteristics, bit error rate - signal to noise ratio and bit error rate - normalized delay characteristics were compared with computer simulation results show that, SEWRLS ADFE than other equalizers have better performance.