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Innovation and Optimization of Integrated Radio Distribution System

Author: CuiLi
Tutor: HuangXu
School: Suzhou University
Course: Communication and Information System
Keywords: Distribution system indoor PHS CDMA2000 Innovation
CLC: TN929.5
Type: Master's thesis
Year: 2008
Downloads: 93
Quote: 0
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Abstract


With a new round restructuring of china’s telecommunication industry, China Telecom gets the CDMA2000 system which belonged to China Unicom before. Now, China Telecom gets two sets of wireless system. The purpose of this research is China Telecom’s PHS distribution system indoor existed compatible to CDMA2000 system reform.Distribution system indoor contains three main parts: Source, a combined equipment, antenna and cable systems. This innovation is aimed at three parts. As the original distribution system indoor is PHS distribution system indoor, the source is the PHS source. During the innovation process, the introduction of CDMA2000 source is needed. After comparative analysis, we introduce the standard CDMA2000 source. Introducing the combined equipment is to realize the compatible of two different systems. When introducing the combined equipment, to ensure the source and the same antenna and cable systems, compared to the attenuation of the signal differences in the bridge-Hop in the way we select a higher price However, a better performance Combiner together as a way of the combined equipment. In order to reduce the loss of CDMA signal and be compatible with the CDMA system, when innovating the antenna and cable systems, we innovate the antenna, the trunk device and the layer device by step. The test result shows that after the innovation of the PHS distribution system indoor, for CDMA2000 the signal, the antenna part of the innovation brings the system gain 5dB; trunk device innovation can bring the system gain of 3dB; layer device innovation can bring the system 3dB Gain. The innovated distribution system indoor can be compatible with CDMA2000 without affecting the original PHS system. Performance and indicators achieves indicators of national and the Department of information industry asked.Based on the above conclusion, taking into account the indoor distribution system and improvement of the performance of the investment in the issue, we make 3 kinds of innovation: high quality products, improved quality products and economical products to apply to different scenarios and business needs.

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