ICS无线通信数字直放站的关键技术研究与实现
发布时间：2019-03-04 12:42
【摘要】：随着新一代无线通信系统的商用,各大运营商掀起了新网络的建设高潮。如果,仅通过密集架设基站,来完成网络的覆盖,势必会造成资源的浪费。作为基站建网的补充,ICS(Interference Cancel System,干扰抑制系统)无线通信数字直放站,在运营商的网络建设中发挥着重要作用。本文在介绍ICS无线通信数字直放站基本工作原理的基础上,对其中的两项关键技术:预处理技术和RLS(Recursive Least Square,递归最小二乘)自适应滤波技术,进行了研究。预处理技术部分,研究了耦合回波信号延时估计技术,并提出了耦合回波信道多径位置估计技术。耦合回波信号延时估计技术,通过广义互相关运算,提升了延时估计的准确度;耦合回波信道多径位置估计技术,通过利用已估路径的先验信息,提高了待估路径信噪比,使多径位置估计更为准确。RLS自适应滤波技术部分,主要包括对现有RLS算法的研究,和对现有RLS算法的线性约束改进。该部分,首先介绍了现有的传统RLS算法、快速横向RLS算法和稳定快速横向RLS算法。然后,基于耦合回波信道的特点,提出了对传统RLS算法和稳定快速横向RLS算法的线性约束改进。随后,本文分别对预处理技术和RLS自适应滤波技术,进行了MATLAB仿真。仿真结果显示,本文提出的耦合回波信道多径位置估计技术,和改进的RLS自适应滤波算法,均表现出较优性能,具有较强的应用价值。最后,本文基于FPGA,对预处理技术和改进的稳定快速横向RLS算法,进行了硬件功能的仿真。结果显示,本文提出的耦合回波信道多径位置估计技术,实现了对硬件资源的节约。
[Abstract]:With the new generation of wireless communication system commercial, the major operators set off a new network construction climax. If only dense base stations are installed to complete the coverage of the network, there will be a waste of resources. As a complementary, ICS (Interference Cancel System, interference suppression system for base station construction, wireless communication digital repeater plays an important role in the network construction of operators. On the basis of introducing the basic working principle of ICS wireless communication digital repeater, two key technologies, pre-processing technology and RLS (Recursive Least Square, recursive least squares (RLS) adaptive filtering technique, are studied in this paper. In the pre-processing technology, the coupling echo signal delay estimation technique is studied, and the multi-path position estimation technique of coupled echo channel is proposed. Coupled echo signal delay estimation technology, through the generalized cross-correlation operation, improves the accuracy of delay estimation; Coupled echo channel multi-path position estimation technique improves the signal-to-noise ratio of the estimated path by using the priori information of the estimated path, and makes the multipath position estimation more accurate. The part of the adaptive filtering technique includes the research of the existing RLS algorithm. And to improve the existing RLS algorithm with linear constraints. In this part, the traditional RLS algorithm, the fast lateral RLS algorithm and the stable and fast transverse RLS algorithm are introduced. Then, based on the characteristics of the coupled echo channel, a linear constraint improvement to the traditional RLS algorithm and the stable and fast transverse RLS algorithm is proposed. Then, the pre-processing technology and RLS adaptive filtering technology are simulated by MATLAB. The simulation results show that the proposed multi-path position estimation technique for coupled echo channels and the improved RLS adaptive filtering algorithm both show excellent performance and have strong application value. Finally, the hardware function simulation is carried out based on FPGA, pretreatment technology and improved stable and fast transverse RLS algorithm. The results show that the multi-path position estimation technique proposed in this paper can save the hardware resources.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.5
本文编号：2434278
[Abstract]:With the new generation of wireless communication system commercial, the major operators set off a new network construction climax. If only dense base stations are installed to complete the coverage of the network, there will be a waste of resources. As a complementary, ICS (Interference Cancel System, interference suppression system for base station construction, wireless communication digital repeater plays an important role in the network construction of operators. On the basis of introducing the basic working principle of ICS wireless communication digital repeater, two key technologies, pre-processing technology and RLS (Recursive Least Square, recursive least squares (RLS) adaptive filtering technique, are studied in this paper. In the pre-processing technology, the coupling echo signal delay estimation technique is studied, and the multi-path position estimation technique of coupled echo channel is proposed. Coupled echo signal delay estimation technology, through the generalized cross-correlation operation, improves the accuracy of delay estimation; Coupled echo channel multi-path position estimation technique improves the signal-to-noise ratio of the estimated path by using the priori information of the estimated path, and makes the multipath position estimation more accurate. The part of the adaptive filtering technique includes the research of the existing RLS algorithm. And to improve the existing RLS algorithm with linear constraints. In this part, the traditional RLS algorithm, the fast lateral RLS algorithm and the stable and fast transverse RLS algorithm are introduced. Then, based on the characteristics of the coupled echo channel, a linear constraint improvement to the traditional RLS algorithm and the stable and fast transverse RLS algorithm is proposed. Then, the pre-processing technology and RLS adaptive filtering technology are simulated by MATLAB. The simulation results show that the proposed multi-path position estimation technique for coupled echo channels and the improved RLS adaptive filtering algorithm both show excellent performance and have strong application value. Finally, the hardware function simulation is carried out based on FPGA, pretreatment technology and improved stable and fast transverse RLS algorithm. The results show that the multi-path position estimation technique proposed in this paper can save the hardware resources.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.5
【参考文献】
相关硕士学位论文 前1条
1 钱锐;ICS无线数字直放站的系统设计与实现[D];电子科技大学;2011年
，本文编号：2434278
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