摘要
针对单输入多输出超宽带(SIMO-UWB)系统中多码流干扰和符号间干扰的问题,提出功率受限的时间反演(TR)块对角化-最小均方误差(TR-BD-MMSE)预编码器以抑制干扰。预编码器是基于TR的空时聚焦特性,采用缩短的等效信道设计,并将预滤波器和预编码器进行级联,置于SIMO-UWB系统的发射端,最后使用标准UWB信道模型进行仿真实验。仿真结果表明:该方案不仅可以降低UWB接收机的复杂度,而且能够对抗SIMO-UWB系统的符号间干扰和多码流干扰,提升SIMO-UWB系统容量。
A power-limited time reversal-block diagonalization-minimum mean square error(TR-BD-MMSE)precoder is raised to suppress the multi-stream interference and inter-symbol interference in single-input multiple-output ultra wideband(SIMO-UWB)system.The precoder is designed with a shortened equivalent channel based on the space-time focus characteristics of time reversal then the prefilter and the precoder are cascaded and placed at the transmitting end of the SIMO-UWB system.Finally,the simulation experiments is realized using standard UWB channel model,and simulation results show that the proposed scheme not only can reduce the complexity of UWB receivers,but also can eliminate inter-symbol interference and multi-code stream interference in single-input multiple-output UWB systems,and improve the capacity of the SIMO-UWB system.
作者
薛建彬
张慧娟
XUE Jianbin;ZHANG Huijuan(College of Computer and Communication,Lanzhou University of Technology,Lanzhou 730050,China;State Grid Longnan Power Supply Company,Longnan 742500,China)
出处
《传感器与微系统》
CSCD
北大核心
2021年第4期110-113,共4页
Transducer and Microsystem Technologies
基金
国家自然科学基金资助项目(61461026)
东南大学移动通信国家重点实验室开放研究基金资助项目(2014D13)。
关键词
超宽带
时间反演
空时聚焦
符号间干扰
多码流干扰
ultra wideband(UWB)
time reversal(TR)
space-time focusing
inter symbol interference
multi-stream interference
