The sign algorithm has been extensively investigated for digital echo cancellation application and other adaptive filtering applications. In this paper, we use the blind averaging Sign-regressor (SR) algorithm for ada...The sign algorithm has been extensively investigated for digital echo cancellation application and other adaptive filtering applications. In this paper, we use the blind averaging Sign-regressor (SR) algorithm for adaptive multiuser detection. It is another least mean square (LMS) algorithm and eliminates the need for multiplication in the adaptive algorithm. The new algorithm not only reduces the calculation complexity but also has good convergence character. Simulations indicate that this algorithm can adapt to the changes of the environment quickly and improve the stability of the SIR.展开更多
高速通信接口中均衡器必须借助于自适应算法才能实时跟踪并处理信道的变化以实现对不同信道损耗的动态补偿。提出一种新的符号最小均方(Sign Sign Least Mean Square,SS-LMS)自适应算法,在传统SS-LMS算法的基础上,使用数字状态机检测接...高速通信接口中均衡器必须借助于自适应算法才能实时跟踪并处理信道的变化以实现对不同信道损耗的动态补偿。提出一种新的符号最小均方(Sign Sign Least Mean Square,SS-LMS)自适应算法,在传统SS-LMS算法的基础上,使用数字状态机检测接收数据的码型,并引入期望值算法,利用内部基准电压和均衡数据的乘积替代外部引入的期望数据,通过比较参考基准电压与接收信号,实现对增益的自适应调节。该算法从根本上解决了传统SS-LMS自适应算法需依赖于外部输入训练数据的缺陷,不但提高了均衡器的自适应能力,而且通过减少接口数量节约了芯片设计成本。采用SMIC 28 nm CMOS工艺,设计了基于改进算法的自适应接收器电路。实现最高12.5 Gb/s传输速率下,通道衰减为25 dB的数据均衡,均衡后的眼图水平张开度可达到0.88 UI。展开更多
摘要The sign algorithm has been extensively investigated for digital echo cancellation application and other adaptive filtering applications. In this paper, we use the blind averaging Sign-regressor (SR) algorithm for adaptive multiuser detection. It is another least mean square (LMS) algorithm and eliminates the need for multiplication in the adaptive algorithm. The new algorithm not only reduces the calculation complexity but also has good convergence character. Simulations indicate that this algorithm can adapt to the changes of the environment quickly and improve the stability of the SIR.