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Method and device for eliminating frequency deviation through temperature compensation in WCDMA (Wideband Code Division Multiple Access) frequency selector

A temperature compensation and frequency offset technology, applied in the direction of automatic power control, electrical components, transmission systems, etc., can solve the problems of the center frequency point and bandwidth offset of the intermediate frequency sound meter

Inactive Publication Date: 2013-06-05
厦门胜华通信技术有限公司
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Problems solved by technology

Because the characteristics of quartz crystal are very affected by temperature, the center frequency point and bandwidth of the intermediate frequency sound meter will shift, and it cannot be directly corrected by temperature compensation.
This becomes a difficult problem that cannot be solved by temperature compensation in the frequency selector

Method used

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  • Method and device for eliminating frequency deviation through temperature compensation in WCDMA (Wideband Code Division Multiple Access) frequency selector
  • Method and device for eliminating frequency deviation through temperature compensation in WCDMA (Wideband Code Division Multiple Access) frequency selector
  • Method and device for eliminating frequency deviation through temperature compensation in WCDMA (Wideband Code Division Multiple Access) frequency selector

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Embodiment Construction

[0019] Combine below figure 1 , figure 2 and image 3 The present invention is further described in detail.

[0020] exist figure 1 The middle temperature detection module 5 is used to detect the ambient temperature of the intermediate frequency sound meter 2 in the frequency selector. The temperature detection module 5 adopts a voltage output type integrated temperature sensor (LM35), and the connection circuit is as follows: Figure 4 Shown, the relationship between the corresponding output level and temperature see Figure 5 . The temperature detection module 5 finally obtains an output level, which represents the actually detected ambient temperature.

[0021] The output level of the temperature detection module 5 is transmitted to the micro-processing module 6 . The micro-processing module 6 stores the frequency offset of the intermediate-frequency sound meter 2 as the ambient temperature changes, that is, the frequency compensation. The temperature range of the f...

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Abstract

The invention discloses a method for eliminating frequency deviation through temperature compensation in a WCDMA frequency selector, wherein frequency deviation is formed due to environmental temperature change in a medium-frequency sound meter, and the N frequency-division coefficient of a phase-locking frequency-doubling circuit is controlled according to a frequency deviation quantity, so thatthe deviation quantity consistent with the medium-frequency sound meter is also generated by the output of a VCO (Voltage Controlled Oscillator) to eliminate the frequency deviation. The invention mainly discloses a device for eliminating the frequency deviation through temperature compensation in the WCDMA frequency selector, which comprises a temperature detection module, a microprocessing module and the phase-locking frequency-doubling circuit, wherein the temperature detection module is used for detecting the environmental temperature of the medium-frequency sound meter, and the microprocessing module is used for outputting a control level according to the frequency deviation quantity generated by temperature and controlling the N frequency-division coefficient in the phase-locking frequency-doubling circuit. The invention eliminates the frequency deviation in the WCDMA frequency selector by using a temperature compensation method and keeps the stability and the good communicationquality of the WCDMA frequency selector.

Description

technical field [0001] The invention relates to the technical field of communication electronics, in particular to a method and a device for eliminating frequency offset by temperature compensation in a WCDMA frequency selector. Background technique [0002] At present, in the known field of communication electronics, the technology of temperature compensation is only used to compensate the temperature of the microwave tube of the final stage of the power amplifier, but no effective measures have been taken in the frequency offset of the frequency selector, especially for WCDMA frequency selection. device. [0003] WCDMA band selection has a wide bandwidth and high requirements for sideband suppression. High sideband suppression is conducive to filtering out spurious signals outside the sidebands and amplifying effective communication signals, which can prevent useful signals from being filtered or eliminated due to frequency band offset. weaken. The frequency offset affec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/12H03L7/18
Inventor 黄记辉潘海潮林清兴杨建塔
Owner 厦门胜华通信技术有限公司
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