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A power calibration and real time correction device for CDMA receiver and its implementation method

A real-time correction and power calibration technology, applied in receiver monitoring, transmission monitoring, electrical components, etc.

Active Publication Date: 2011-11-09
WUHAN HONGXIN TELECOMM TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, in the case of small signals, the methods in the prior art cannot perform accurate power calibration because there is no noise compensation, and the total noise figure on the receiving link can only be reduced by using lower-noise high-end link devices, which obviously Increase equipment cost

Method used

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  • A power calibration and real time correction device for CDMA receiver and its implementation method
  • A power calibration and real time correction device for CDMA receiver and its implementation method
  • A power calibration and real time correction device for CDMA receiver and its implementation method

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Embodiment Construction

[0057] The present invention will be further described below in conjunction with accompanying drawing.

[0058] combine first image 3 Explain the technical principle of the present invention. The equipment adopted in the power calibration process of the present invention is as image 3 shown. attached image 3 It is a schematic diagram of the device connection relationship using the power calibration method of the present invention. image 3 Among them, 20 represents the local maintenance terminal LMT, which is used to control the automatic calibration procedure; 22 represents the CDMA receiver, which is the CDMA equipment to be calibrated; 24 represents the controllable signal source 24, and the CDMA receiver 22 and the signal source 24 pass through 21 respectively The first communication cable and the second communication cable 23 are controlled by the LMT, and the signal source 24 outputs a CDMA modulated signal or a single tone signal as a calibration signal.

[0059...

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Abstract

The invention relates to a CDMA receiver power calibration and real-time correction device and the realization method thereof, and the method can be used for the power calibration and the real-time correction of terminal equipment such as the CDMA system, the base station facilities, and the road measurement meter. The method adopts a segment look-up table approach, and not only uses the fastness and simplicity of the look-up table approach but also combines segment treatment, thereby reducing the consumption of the storage room as much as possible. For linear gain section of a receiving link, i.e. the so-called big signal calibration, the look-up table approach is used directly; for non-linear gain section, i.e. small signal calibration, a noise compensation calibration method is adopted. The invention is used especially for the power calibration and the real-time correction of the massive equipment, and the power calibration method can meet the demand of automation and have the advantages of low cost, fast speed and high calibration precision.

Description

technical field [0001] The invention relates to a method for realizing power calibration and real-time correction of a CDMA receiver, and the method can be used for the calibration and real-time correction of terminal equipment, base station equipment, and drive testing instruments in a CDMA system. Background technique [0002] Power measurements are unavoidable for all CDMA devices. For example, for terminal equipment, when the network is initially connected, it is necessary to perform path loss estimation, and it is necessary to perform regular power measurement of the beacon channel during area update or cell handover; for drive test equipment, it is necessary to measure the power of the working frequency point, The code domain power of the beacon channel; for the base station equipment, it is necessary to perform transmit signal strength, receive signal strength indication measurements, and so on. Although the measurement accuracy required by each type of equipment is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/04H04B17/00H04B17/21
Inventor 李锡忠
Owner WUHAN HONGXIN TELECOMM TECH CO LTD
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