Phase-locked loop, microwave modem and phase jump suppressing method

A technology of phase-locked loop and phase detector, which is applied in automatic control of power and electrical components, etc. It can solve the problems of high performance risk and high bit error rate of modem, and achieve the effect of reducing risk and bit error rate

Active Publication Date: 2012-12-26
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problems in the prior art that the loop bandwidth parameter response is delayed when the modulation mode changes, the bit error rate of the modem is hig

Method used

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  • Phase-locked loop, microwave modem and phase jump suppressing method
  • Phase-locked loop, microwave modem and phase jump suppressing method
  • Phase-locked loop, microwave modem and phase jump suppressing method

Examples

Experimental program
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Example Embodiment

[0036] Example one

[0037] See figure 2 , Which shows a structure diagram of a phase-locked loop device provided in the first embodiment. The phase-locked loop can be applied to suppress the phase jump of ODU signal in microwave modem. The phase-locked loop may specifically include: an error correction module 201, a phase detector 202, a parameter selection module 203, a delay adjustment module 204, a filter 205, and a control oscillator 206;

[0038] The error correction module 201 is configured to correct the input data according to the correction signal to obtain corrected data;

[0039] The phase detector 202 is configured to perform error phase discrimination on the data corrected by the error correction module 201 according to the current modulation mode to obtain the phase detector error;

[0040] The parameter selection module 203 is configured to select corresponding loop bandwidth parameters according to the current modulation mode;

[0041] The delay adjustment module 204...

Example Embodiment

[0045] Example two

[0046] See image 3 , Which shows a structure diagram of a phase-locked loop device provided in the second embodiment. The phase-locked loop can be applied to suppress the phase jump of ODU signal in microwave modem. The phase locked loop may specifically include:

[0047] Error correction module 301, phase detector 302, parameter selection module 303, delay adjustment module 304, filter 305 and control oscillator 306;

[0048] The error correction module 301 is used to correct the input data according to the correction signal to obtain the corrected data;

[0049] Specifically, the error correction module 301 corrects the service data input to the microwave modem according to the correction signal generated by the error correction module, and outputs the corrected service data.

[0050] The phase detector 302 is configured to perform error phase discrimination on the data corrected by the error correction module 301 according to the current modulation mode to obt...

Example Embodiment

[0078] Example three

[0079] See Figure 7 , Which shows a method flow chart of a phase jump suppression method provided in the third embodiment. The phase jump suppression method can be applied to suppress phase jumps in a microwave modem through a phase locked loop. The phase jump suppression method may include:

[0080] Step 701: Correct the input data according to the correction signal to obtain corrected data;

[0081] The phase-locked loop in the microwave modem first corrects the service data input to the microwave modem according to the initial correction signal, and outputs the corrected data.

[0082] Step 702: Perform error phase discrimination on the corrected data according to the current modulation mode to obtain phase detector error;

[0083] The phase-locked loop in the microwave modem can determine the data model in an ideal state according to the current modulation mode, and perform error phase discrimination on the corrected service data according to the determined ...

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PUM

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Abstract

The invention discloses a phase-locked loop, a microwave modem and a phase jump suppressing method, belonging to the field of circuit control. The phase-locked loop comprises an error correcting module, a phase discriminator, a parameter selecting module, a time delay adjusting module, a filter and a control oscillator, wherein the parameter selecting module is used for selecting corresponding loop bandwidth parameters according to a current modulation mode; the time delay adjusting module is used for delaying the time for phase discriminator errors or the loop bandwidth parameters; and the filter is used for carrying out the filtering processing on the phase discriminator errors obtained by the phase discriminator according to the loop bandwidth parameters selected by the parameter selecting module. By selecting the loop bandwidth parameters according to the current modulation mode and carrying out time delay processing on the loop bandwidth parameters or the phase discriminator errors at the same time, the problem that the loop bandwidth parameters have response time delay when the modulation mode is changed is solved, and the effects of reducing the bit error ratio of the modern and reducing the risks on performance are achieved.

Description

technical field [0001] The invention relates to the field of circuit control, in particular to a phase-locked loop, a microwave modem and a phase jump suppression method. Background technique [0002] With the continuous development of communication and circuit control fields, many modems can support multiple modulation modes at the same time. When the modulation mode of the modem changes, it is necessary to change the corresponding circuit parameters accordingly to obtain optimal performance. [0003] Taking the microwave modem as an example, when the ODU (OutdoorUnit, outdoor unit) is subject to external stress (such as vibration, temperature change, etc.), the frequency of the signal it sends to the microwave modem will change in a short period of time. This sudden change is called For phase jump. [0004] The phase-jump suppression of the ODU by the microwave modem is mainly realized through a phase-locked loop. See figure 1 In the structure diagram of the phase lock...

Claims

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Application Information

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IPC IPC(8): H03L7/085H03L7/08
Inventor 高福均
Owner HUAWEI TECH CO LTD
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