WCDMA optical fiber direct amplifying station

Abstract

A fiber WCDMA Repeater comprises the proximal and distal machine connected by the fiber. The proximal and distal machine has a module for other switching power supply to provide power supply, followed by tandem with the base station-duplex ports and the launch of mobile-duplex between the downlink driver amplifier, downlink channel election Optional, proximal optical transceivers, fiber, remote optical transceiver, power amplifier and mobile downlink - diplexer constitute downlink; followed in the mobile-duplex serial-port and base stations receiving end diplexer uplink between the low-noise amplifier, remote optical transceiver, optical fiber, optical transceiver proximal, uplink driver amplifier and uplink channel selector constitute uplinks; each of the proximal source control module interface with intelligent monitoring proximal control interface module attached to the distal end of each module of the remote control interface with intelligent monitoring control interface module connected.

Description

technical field [0001] The invention relates to a mobile communication radio frequency transmission device, in particular to a WCDMA optical fiber repeater. Background technique [0002] With the increasing development of the mobile communication market, the business has developed from the original voice service to the value-added service. With the continuous development of mobile value-added services, moving towards 3G (3rd Generation, third-generation mobile communication) is an inevitable choice for mobile operators. Compared with the previous two-generation systems, the main feature of the third-generation mobile communication system is that it can provide rich and colorful mobile multimedia services. Its transmission rate supports 144kb / s in a high-speed mobile environment and 384kb / s in a walking and slow-moving environment. , support 2Mb / s in static state. Its design goal is to provide larger system capacity and better communication quality than the second-generatio...

AI Technical Summary

Problems solved by technology

The first generation mobile communication system adopts the analog modulation method of frequency division multiple access (FDMA). The main disadvantage of this system is that the spectrum utilization rate is low, and the signaling interferes with the voice service.

The second-generation mobile communication system mainly adopts the digital modulation method of time division multiple access (TDMA), which improves the system capacity, and uses an independent channel to transmit signaling, so that the system performance is greatly improved, but the system capacity of TDMA is still limited. Performance is still not perfect

[0005] At present, 2G repeater equipment has been widely used. The standards adopted by 2G repeaters are "ETSI EN300 609", "900 / 1800MHz TDMA Digital Cellular Mobile Communication Network Repeater Technical Requirements and Measurement Methods" and "800MHzCDMA Digital Cellular Mobile Communication Network Repeater Technical Requirements and Measurement Methods", while the 3G repeater adopts the standards "3GPPTS25.143" and "WCDMA Digital Cellular Mobile Communication Network Repeater Technical Requirements and Measurement Methods" (draft for approval), Comparing the standards of 2G repeaters and 3G repeaters, the main differences are: 1. The linearity requirements of 3G repeaters are high, especially the requirements for spurious control are very high

2. The anti-jamming requirement of 3G repeater is high

3. The 3G repeater has high adaptability requirements for input signal strength changes

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