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Synchronization control method for covering TD-SCDMA repeater station signals

A TD-SCDMA and synchronous control technology, applied in transmission control/equalization, communication between multiple stations, radio relay system, etc., can solve problems affecting control effect, real-time performance is not strong, etc., to achieve enhanced control Function, good signal coverage, effect of good signal coverage

Inactive Publication Date: 2009-02-25
SHENZHEN GRENTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In traditional repeaters, the analog input control output method is usually used, which is disturbed by factors such as individual differences in control, differences in analog devices, differences in control depth, and differences in ambient temperature, and the real-time performance is not strong. Influence control effect

Method used

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  • Synchronization control method for covering TD-SCDMA repeater station signals
  • Synchronization control method for covering TD-SCDMA repeater station signals
  • Synchronization control method for covering TD-SCDMA repeater station signals

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Embodiment Construction

[0020] Detailed description below in conjunction with accompanying drawings.

[0021] figure 2 It is a schematic structural diagram of a typical TD-SCDMA repeater system. figure 2 The repeater mainly includes: the first duplexer, the second duplexer, the downlink and uplink connected between the first duplexer and the second duplexer, and a synchronization control part (ie, a synchronization module), etc. .

[0022] The downlink includes a downlink low-noise amplifying unit, a frequency selection unit and a downlink power amplifying unit. Both the downlink low-noise amplifying unit and the downlink power amplifying unit contain an ALC (Automatic Level Control) control unit. The ALC control unit adjusts the output power of each time slot.

[0023] The uplink includes an uplink low-noise amplification unit, a single-slot attenuation power module, a frequency selection unit, and an uplink power amplification unit. The single-slot attenuation power module and the frequency se...

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Abstract

A method for synchronization control of signal coverage of a TD-SCDMA repeater comprises the steps of (a) collecting the power detection value of each time slot of each level of amplifier chain in an uplink and a downlink, and setting the maximum power value of each time slot of each level of amplifier chain; (b) regulating the output power of each time slot in each level of amplifier chain via abuilt-in auto level control (ALC) unit; (c) detecting the controlling depth and the maximum value of each level of amplifier chain in the downlink, and calculating the total ALC controlling depth andthe gain of the downlink; and (d) adding up the total ALC controlling depth and a set attenuation value of the uplink to obtain the total attenuation value of the uplink, and attenuating the power ofeach uplink time slot via a single-time slot attenuation module of the uplink by using the total attenuation value. At the same time, in each level of ALC, the power of each uplink time slot is attenuated according to the total attenuation value of the uplink, thereby resulting in real-time stable output of repeater signals and good signal coverage under the conditions of complex electromagnetic circumstance and large signal coverage difference.

Description

technical field [0001] This patent relates to mobile communication technology, specifically a synchronous control method for TD-SCDMA repeater signal coverage. In the case of large input signal fluctuations, this method can realize real-time and stable output of TD-SCDMA repeater signals. Further improve the quality of wireless network coverage. Background technique [0002] The biggest difference between the TD-SCDMA system and other 3G systems lies in the different physical layer technologies. In the TDD system, the frequencies used for the uplink and downlink channels are the same, and each wireless frame is 10ms long. TD-SCDMA divides each wireless frame into two 5ms subframes, and the frame structures of the two subframes are exactly the same. refer to figure 1 , each subframe consists of 7 regular time slots (TS0-TS6) with a length of 675us and 3 special time slots, the 3 special time slots include downlink pilot time slots DwPTs, guard interval GP and uplink pilot t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26H04B7/005H04B7/14
Inventor 李保华
Owner SHENZHEN GRENTECH CO LTD
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