Method for adaptively adjusting CFR threshold and radio frequency zooming system

A self-adaptive adjustment and threshold technology, applied in the field of TD-SCDMA communication, can solve the problems of unadjustable CFR threshold, the indicators of power amplifier output cannot reach the best state, etc., and achieve the effect of good real-time performance and high precision

Active Publication Date: 2009-10-21
成都芯通软件有限公司
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for adaptively adjusting the CFR threshold, which aims to solve the problem that

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  • Method for adaptively adjusting CFR threshold and radio frequency zooming system
  • Method for adaptively adjusting CFR threshold and radio frequency zooming system
  • Method for adaptively adjusting CFR threshold and radio frequency zooming system

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[0024] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0025] The method for adaptively adjusting the CFR threshold provided by the embodiment of the present invention captures a time slot signal from the signal fed back from the power amplifier to the DPD, analyzes and calculates the index of the output signal of the power amplifier from the time slot signal, and compares the index with the The preset standard is compared, and the CFR threshold is adjusted accordingly according to the comparison result, and then continue to capture and calculate the index of the output signal of the power amplifier after adjustment. After such iterative adjustment, the...

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Abstract

The invention is suitable for the field of TD-SCDMA communication, and provides a method for adaptively adjusting CFR threshold and a radio frequency zooming system. The method comprises the following steps that: A, capturing a downlink time slot signal from signals fed back to digital pre-distortion (DPD) from power amplification; B, analyzing and calculating an output index of the power amplification from the time slot signal, wherein the index at least comprises an error vector magnitude (EVM); and C, judging whether the index meets the preset standard, and if so, returning and carrying out the step A, otherwise, according to the preset stepping, adjusting the CFR threshold and returning to carry out the step A. The method can detect the index of the PA output signal in real time by utilizing a feedback loop of the DPD, and adaptively adjusts the CFR threshold according to the index to achieve the optimization of the power amplification performance.

Description

technical field [0001] The invention belongs to the field of TD-SCDMA communication, and in particular relates to a method for adaptively adjusting a CFR threshold and a remote radio system. Background technique [0002] With the development of mobile communication, the output power increases, the number of carriers increases, and the number of supported users increases, which puts forward higher requirements for various indicators of the remote radio system. In the TD-SCDMA system, the intermediate frequency signal is usually formed by adding multiple independent baseband signals, and the synthesized intermediate frequency signal has a large peak-to-average ratio (Peak-to-Average Ratio, PAR) and conforms to a Gaussian distribution. Usually, the linear region of a power amplifier (PA) is limited, and the working range of the PA corresponding to an intermediate frequency signal with a relatively large PAR will be reduced, thereby causing a decrease in PA efficiency. Therefor...

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Application Information

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IPC IPC(8): H04B7/26H04B1/707H04W16/26H04W52/52
Inventor 汤国东周祺睿周彦沛余春蕾
Owner 成都芯通软件有限公司
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