Based on the constant modulus criterion, a new Widely Linear(WL) blind equalizer and a novel widely linear recursive least square constant modulus algorithm are proposed to improve the blind equalization performance f...Based on the constant modulus criterion, a new Widely Linear(WL) blind equalizer and a novel widely linear recursive least square constant modulus algorithm are proposed to improve the blind equalization performance for complex-valued noncircular signals. The new algorithm takes advantage of the WL filtering theory by taking full use of second-order statistical information of the complex-valued noncircular signals. Therefore, the weight vector contains the complete second-order information of the real and imaginary parts to decrease the residual inter-symbol interference effectively. Theoretical analysis and simulation results show that the proposed scheme can significantly improve the equalization performance for complex-valued noncircular signals compared with traditional blind equalization algorithms.展开更多
针对均衡器在高衰减处阻抗匹配差的问题,提出一种低驻波（VSWR）微带宽带均衡器。该均衡器的基本陷波单元由2个电阻加载的开路谐振器和3段不同特性阻抗的1/4波长传输线组成。与传统的并联枝节型均衡器相比,文中提出的均衡器的优点在于...针对均衡器在高衰减处阻抗匹配差的问题,提出一种低驻波（VSWR）微带宽带均衡器。该均衡器的基本陷波单元由2个电阻加载的开路谐振器和3段不同特性阻抗的1/4波长传输线组成。与传统的并联枝节型均衡器相比,文中提出的均衡器的优点在于更紧凑的尺寸和低反射设计。利用文中推导的阻抗匹配条件公式能够得到低驻波的初值,同时也没有某些低驻波均衡器要求的加载电阻R必须大于50Ω的限制。在6~16 GHz频率内该均衡器仿真和测试的回波损耗基本大于10 d B。展开更多
基金Supported by the National Natural Science Foundation of China(No.61072046)the Basic Scientific and Technological Frontier Project of Henan Province(No.1123004100322)
文摘Based on the constant modulus criterion, a new Widely Linear(WL) blind equalizer and a novel widely linear recursive least square constant modulus algorithm are proposed to improve the blind equalization performance for complex-valued noncircular signals. The new algorithm takes advantage of the WL filtering theory by taking full use of second-order statistical information of the complex-valued noncircular signals. Therefore, the weight vector contains the complete second-order information of the real and imaginary parts to decrease the residual inter-symbol interference effectively. Theoretical analysis and simulation results show that the proposed scheme can significantly improve the equalization performance for complex-valued noncircular signals compared with traditional blind equalization algorithms.
文摘针对均衡器在高衰减处阻抗匹配差的问题,提出一种低驻波（VSWR）微带宽带均衡器。该均衡器的基本陷波单元由2个电阻加载的开路谐振器和3段不同特性阻抗的1/4波长传输线组成。与传统的并联枝节型均衡器相比,文中提出的均衡器的优点在于更紧凑的尺寸和低反射设计。利用文中推导的阻抗匹配条件公式能够得到低驻波的初值,同时也没有某些低驻波均衡器要求的加载电阻R必须大于50Ω的限制。在6~16 GHz频率内该均衡器仿真和测试的回波损耗基本大于10 d B。
