一种基于交叉极化干扰抵消的微波传输系统室内单元设计
发布时间：2018-09-19 12:41
【摘要】：随着科技飞速发展,通信技术也在飞速发展。通信技术进步最明显的特征是通信传输速率的增长,用以衡量通信传输速率的单位由Kbps上升为Mbps、Gbps乃至Tbps。通信技术的进步还体现在传输方式的变革,从电缆传输到光纤传输,从有线通信到无线通信,每一次传输方式的变革都会给人们带来新的通信体验。此外,通信传输的业务类型也在不断增加,如前期只有适用于语音通信的E1业务和STM-1业务,到后期出现了以太网分组业务。微波传输系统是通信技术进步的产物,该系统可以把只能通过有线传输的E1、STM-1和分组业务等多种业务数据组帧复用后调制到微波链路中进行无线传输。微波传输系统架设快捷,开通方便。微波特性与可见光类似,可无视地形复杂度而进行视距通信,传输距离可达数十千米。此类设备多用于自然灾害通信网络快速重建、海峡、悬崖间通信和人口分布密度小的地区通信。微波通信的缺点是频谱利用率低,导致信息传输速率也较低。为了提高信息传输速率,微波通信使用了正交幅度调制、同波道交叉极化传输等技术。本文以支持xPIC(交叉极化干扰抵消)功能的微波传输系统IDU设计为主题展开介绍。文章内容主要包括了4个部分：1.相关理论研究与仿真验证。介绍了XPIC(交叉极化干扰抵消)实现原理并对该算法用MATLAB进行仿真；介绍了本文涉及到的调制解调方式的实现方式与性能分析。2.硬件设计。设计了电源拓扑以及主控盘、业务盘、调制解调盘等单盘。该设计的创新点为,IDU采用多时钟源设计,把业务恢复时钟、本地时钟和数字同步网的时钟都送入主控盘,主控盘按优先级选择其中一路时钟作为工作主时钟,并通过时钟分发器发送到各单盘上,即实现了微波通信系统时钟同步。本部分还介绍了EMC在IDU的实际应用。3.软件设计。用“自顶向下”的方法对IDU的监控软件进行分层设计。4.调测结果。对IDU进行硬、软件和系统层的测试,测试结果表明本次设计的IDU较完美地达到预期指标。
[Abstract]:With the rapid development of science and technology, communication technology is also developing rapidly. The most obvious feature of the advances in communication technology is the increase in the rate of communication transmission, which is measured by the rise from Kbps to Mbps,Gbps and even Tbps.. The progress of communication technology is also reflected in the transformation of transmission mode, from cable transmission to optical fiber transmission, from wired communication to wireless communication, each time the transformation of transmission mode will bring people a new communication experience. In addition, the types of communication transmission are also increasing, such as E1 service and STM-1 service, which are only suitable for voice communication, and ethernet packet service appears in the later period. Microwave transmission system is the result of the development of communication technology. This system can modulate the multi-service data group frame multiplexing only through wired transmission such as E1STM-1 and packet service into the microwave link for wireless transmission. Microwave transmission system is set up fast and convenient to open. Microwave, similar to visible light, can communicate with visual range regardless of terrain complexity, and the transmission distance can reach tens of kilometers. Such devices are used for rapid reconstruction of natural disaster communication networks, communication between straits, cliffs, and communications in areas with low population density. The disadvantage of microwave communication is that the spectrum efficiency is low, and the rate of information transmission is also low. In order to improve the rate of information transmission, the orthogonal amplitude modulation (OAM) and cross-polarization transmission of the same channel are used in microwave communication. In this paper, the IDU design of microwave transmission system supporting xPIC (cross polarization interference cancellation) is introduced. The article mainly includes four parts: 1. Related theoretical research and simulation verification. This paper introduces the realization principle of XPIC (Cross polarization interference cancellation) and simulates the algorithm with MATLAB, and introduces the realization and performance analysis of the modulation and demodulation method involved in this paper. Hardware design. The power topology and single disk, such as main control disk, service disk, modulation and demodulation disk, are designed. The innovation of this design is that the IDU adopts multi-clock source design, which sends the service recovery clock, the local clock and the digital synchronous network clock to the main control disk, and the main control disk selects one of them as the working master clock according to the priority. The clock synchronization of microwave communication system is realized by sending the clock to each single disk. This section also introduces the practical application of EMC in IDU. Software design. Using the "top-down" method to the IDU monitoring software layer design. 4. Test results. The hardware, software and system level of IDU are tested. The test results show that the designed IDU achieves the expected target perfectly.
【学位授予单位】：武汉邮电科学研究院
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN925
本文编号：2250148
[Abstract]:With the rapid development of science and technology, communication technology is also developing rapidly. The most obvious feature of the advances in communication technology is the increase in the rate of communication transmission, which is measured by the rise from Kbps to Mbps,Gbps and even Tbps.. The progress of communication technology is also reflected in the transformation of transmission mode, from cable transmission to optical fiber transmission, from wired communication to wireless communication, each time the transformation of transmission mode will bring people a new communication experience. In addition, the types of communication transmission are also increasing, such as E1 service and STM-1 service, which are only suitable for voice communication, and ethernet packet service appears in the later period. Microwave transmission system is the result of the development of communication technology. This system can modulate the multi-service data group frame multiplexing only through wired transmission such as E1STM-1 and packet service into the microwave link for wireless transmission. Microwave transmission system is set up fast and convenient to open. Microwave, similar to visible light, can communicate with visual range regardless of terrain complexity, and the transmission distance can reach tens of kilometers. Such devices are used for rapid reconstruction of natural disaster communication networks, communication between straits, cliffs, and communications in areas with low population density. The disadvantage of microwave communication is that the spectrum efficiency is low, and the rate of information transmission is also low. In order to improve the rate of information transmission, the orthogonal amplitude modulation (OAM) and cross-polarization transmission of the same channel are used in microwave communication. In this paper, the IDU design of microwave transmission system supporting xPIC (cross polarization interference cancellation) is introduced. The article mainly includes four parts: 1. Related theoretical research and simulation verification. This paper introduces the realization principle of XPIC (Cross polarization interference cancellation) and simulates the algorithm with MATLAB, and introduces the realization and performance analysis of the modulation and demodulation method involved in this paper. Hardware design. The power topology and single disk, such as main control disk, service disk, modulation and demodulation disk, are designed. The innovation of this design is that the IDU adopts multi-clock source design, which sends the service recovery clock, the local clock and the digital synchronous network clock to the main control disk, and the main control disk selects one of them as the working master clock according to the priority. The clock synchronization of microwave communication system is realized by sending the clock to each single disk. This section also introduces the practical application of EMC in IDU. Software design. Using the "top-down" method to the IDU monitoring software layer design. 4. Test results. The hardware, software and system level of IDU are tested. The test results show that the designed IDU achieves the expected target perfectly.
【学位授予单位】：武汉邮电科学研究院
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN925
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