Method for repeater to obtain switch point in TD-SCDMA system

A TD-SCDMA, repeater technology, applied in the field of TD-SCDMA system, can solve the problems of bottom noise amplification, cell interference, large system impact, etc., to achieve the effect of convenient engineering installation, low cost, and reduce bottom noise interference

Inactive Publication Date: 2007-09-26
WUHAN UNIV OF TECH
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Problems solved by technology

Obviously, the cost of such a solution will be high, and for enterprises that only produce repeaters, they need to contact the corresponding donor base station to modulate the information of the second conversion point into the specific downlink information, and the repeater will pass the corresponding solution Call the module to find out the position information of the second conversion point
[0005] In addition, when there is no useful signal input at the input end of the repeater, the noise signal prese

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  • Method for repeater to obtain switch point in TD-SCDMA system
  • Method for repeater to obtain switch point in TD-SCDMA system
  • Method for repeater to obtain switch point in TD-SCDMA system

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Embodiment Construction

[0030] The process of obtaining two conversion points in the present invention will be further described in detail below with reference to the accompanying drawings.

[0031] Figure 2 is the burst format of the DwPTS time slot, which is designed to establish downlink synchronization. The base station transmits in all directions with maximum power. The content includes GP of 32 chips (chip) and SYNC_DL of 64 chips. The total time length is 75μs. Among them, SYNC_DL is a 64-bit PN sequence predetermined by the system. In the TD-SCDMA system, a total of 32 downlink synchronization codes (SYNC-DL) are defined, and each cell will use three fixed downlink synchronization codes, and the downlink synchronization codes of adjacent cells are different from each other. After the baseband captures the downlink synchronization signal, the repeater can accurately calculate the arrival time of SYNC-DL and obtain the position of the first conversion point.

[0032] For the second conversion...

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Abstract

The invention relates to a method of direct station obtains breaking point in TD-SCDMA system; the method includes steps as following: when it is started, the direct station is switched to the state of receiving down-bound signal to receive down-bound signal; the direct station captures the time that down-bound pilot frequency signal arrives at the direct station; from the hour that the TS2 time slot ends, the hour that every time slot ends is supposed as possible time of the second switching point; determining whether the switching section is a real time switching section; processing the next time slot; when the direct station receives the up-bound pilot frequency signal for the second time, then it is recovered to normal condition to execute the ascending-descending switch of step 1-step 6. The invention adopts method of base band synchronization to obtain the information of breaking point automatically without distribution with benefactor base station, it can be worked at system that the distribution mode of ascending-descending time slot is continuously changeable, the engineering is easy to install, the cost is low, and the interference of noise to areola can be decreased efficiently.

Description

technical field [0001] The present invention relates to the TD-SCDMA system, and aims at the acquisition of the uplink and downlink conversion points of the repeater in the TD-SCDMA system, and proposes a simple and feasible baseband processing scheme, specifically a repeater in the TD-SCDMA system The method to get the transformation point. Background technique [0002] The TD-SCDMA system (3G mobile communication system) repeater is the same as the repeater of other mobile communication systems. The repeater can enhance and forward the signals sent by the base station and the mobile phone, thereby expanding or supplementing the coverage of the communication network. . Currently existing repeaters can operate in GSM, IS95, CDMA2000, W-CDMA and other mobile communication systems using FDD duplex mode. In these systems, uplink wireless signals and downlink wireless signals are at different frequencies. Therefore, the existing repeater generally incl...

Claims

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Application Information

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IPC IPC(8): H04B7/15H04B7/212
Inventor 李平安吴刚张晓王晓岚
Owner WUHAN UNIV OF TECH
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