在数字微波收音机上高效传输

IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond Pub Date : 1989-11-27 DOI:10.1109/GLOCOM.1989.64000

T. Ryu, S. Maeda, S. Ozaki, H. Hashimoto, A. J. Moreland

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引用次数: 1

摘要

目前用于干线的高容量数字微波无线电(DMR)采用64qam(正交调幅)调制，效率为4.5 b/Hz，在30mhz带宽内传输135mbps数据。采用双偏振传输技术，可实现9b /Hz的传输效率，并可在30mhz带宽下传输270 Mb/s的数据。介绍了一种采用双极化的64 QAM DMR传输系统的特点和结构。从技术和经济的角度来看，当通信容量大于135mb /s时，采用交叉极化干扰消除器的64qam DMR是目前最可行的方案

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High efficient transmission on digital microwave radio

The high-capacity digital microwave radio (DMR) currently used for trunk lines has a 4.5-b/Hz efficiency using 64 QAM (quadrature amplitude modulation) modulation and transmits 135-Mbps data within a 30-MHz bandwidth. When dual-polarization transmission techniques are used, an efficiency of 9 b/Hz can be achieved and transmission of 270 Mb/s data in the 30-MHz bandwidth becomes possible. The features and configuration of a 64 QAM DMR transmission system using dual polarization are presented. It is concluded that, currently, the 64 QAM DMR with XPIC (cross-polarization interference cancellers) is the most feasible system from both the technical and economical viewpoints when a capacity of higher than 135 Mb/s is required.<>

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来源期刊

IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond

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