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Method and device for calibrating downlink channel gain

A technology of channel gain and calibration method, applied in wireless communication, power management, electrical components, etc., can solve the problems of slow calibration speed and poor stability of communication system, and achieve the effect of fast calibration speed and accurate calibration results

Active Publication Date: 2011-01-19
北京万海云科技有限公司
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Problems solved by technology

Using the existing temperature compensation calibration method, due to the dependence on the temperature curve, the temperature curve needs to be continuously extracted as the temperature changes, and the error of the temperature curve is used to accumulate the calculation gain, so the calibration speed is slow, and the system resources are occupied for a long time. Busy with the calibration process, the stability of the communication system is poor
[0006] In short, the existing downlink channel gain calibration methods cannot achieve fast and accurate calibration of downlink channel gain

Method used

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  • Method and device for calibrating downlink channel gain
  • Method and device for calibrating downlink channel gain
  • Method and device for calibrating downlink channel gain

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Embodiment Construction

[0052] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0053] The basic idea of ​​the present invention is to calculate the power difference between the forward power value and the target power value through OPD, preset the calibration threshold of the downlink channel gain calibration, and calculate the gain according to the power difference when the power difference reaches the calibration threshold Adjustment value, to calibrate the current downlink channel gain.

[0054] figure 1It is a schematic structural diagram of a downlink channel in the prior art. Such as figure 1 As shown, the existing downlink channel is composed of the radio frequency board 11, the backplane wiring 12, the power amplifier 13, the duplexer 14 and the antenna feeder wiring 15, and the radio frequency board 11, the backpl...

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Abstract

The invention discloses a method for calibrating downlink channel gain. The method comprises the following steps of: acquiring a forward power value through forward power detection (OPD); calculating a power difference value between the forward power value and a target power value; calculating downlink channel gain adjustment according to the power difference value when absolute value of the power difference value is greater than or equal to a preset calibration threshold value; and calibrating current downlink channel gain according to the downlink channel gain adjustment. The invention alsodiscloses a device for calibrating the downlink channel gain. By adopting the method and device for calibrating the downlink channel gain, the downlink channel gain can be quickly and accurately calibrated.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a downlink channel gain calibration method and device. Background technique [0002] In a Time Division Synchronous Code Division Multiple Access (TD-SCDMA) communication system, the inconsistency of devices in the downlink channel and changes with temperature and other factors cause the drift of the downlink channel gain, and the drift of the downlink channel gain directly leads to the maximum transmit power of the downlink channel. Drift, thereby affecting the maximum transmit power of a base station (Node B, NB for short), affecting the coverage radius and service quality of the NB. In order to ensure the coverage radius and service quality of the NB, the TD-SCDMA communication system requires the NB to maintain a stable maximum transmit power. Therefore, when the deviation of the downlink output power from the maximum transmit power exceeds the technical range, g...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/08H04W52/14H04W52/48
CPCY02B60/50
Inventor 何定润王浩王忠勇汤国东
Owner 北京万海云科技有限公司
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