Micro-wave extension method and device of the time division duplex mobile communication system

Abstract

The invention discloses a methode and device of microwave zooming out with time division duplex in the mobile communication system. It has solved the problem of radio frequency zoom out with cable or optical fiber connection bwteen base station and antenna in TD-SCDMA system. The microwave transmission equipment is composed of cable and wireless base stations connected by group of separation remote microwave machine and microwave cables using the antenna amplifier. Microwave antenna amplifier synchronization is controlled by wireless base station through the cable control. Remote microwave machine and antenna amplifier synchronization and controlling is abtained by wireless control unit through the medium of space communication. Using three electric control decliners, outself-adapting control can be achieved. The invention solves the problem of TD-SCDMA super base station radio frequency zooming out.

Description

Technical field [0001] The present invention relates to a microwave transmission method and device for 3G (3rd generation mobile communication) base station equipment to realize remote radio frequency. In particular, it relates to a microwave method and device proposed for use in time division duplex mobile communication systems (such as TD-SCDMA system), which solves the problem that the base station and antenna in the TD-SCDMA system cannot be completely connected by cables or optical fibers to achieve remote radio frequency. The problem. Background technique [0002] In the second generation of mobile communication systems, such as GSM and IS-95CDMA systems, in order to solve the difficulty of temporarily unable to set up transmission lines between the wireless base station and the base station controller, a large number of digital microwave remote devices have been used to transmit between the above two devices. signal of. At present, in major cities in my country, a large nu...

AI Technical Summary

Problems solved by technology

Specifically, in the FDD remote microwave device, the radio frequency receiver and transmitter of the microwave machine will work continuously using different carriers; while in the TD-SCDMA system, the same carrier frequency is used for reception and transmission, but according to The system timing works separately, and this timing may change according to the system requirements during the system work

[0007] 2. The current method of using remote microwave devices in the second-generation mobile communication network is to transmit signals between the base station and the base station controller, and the required data transmission rate is very low (generally 1 to several 2Mbps E1 ), the signal strength is relatively fixed, and the dynamic range is relatively small, so a simple PDH microwave remote device can meet the requirements

When used in remote radio frequency of TD-SCDMA system, the required data transmission rate may be dozens of times higher, and the signal dynamic range may require 60-70dB, which is difficult for traditional PDH and SDH microwave equipment to meet the requirements

[0008] 3. Existing digital microwave remote devices all work in frequency-division duplex mode, which is not suitable for transmitting signals of time-division duplex mobile communication systems

[0009] 4. When remote microwave devices are widely used in cities to realize remote radio frequency, there must be radio frequency interference in each microwave system, and the use of lower frequency bands will limit the number of remote microwave devices used

Images