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Regulating method and apparatus carrier frequency of multiple transmit and multiple receive microwave apparatus

A carrier frequency, multi-transmit and multi-receive technology, applied in modulation carrier systems, space transmit diversity, diversity/multi-antenna systems, etc., and can solve problems such as carrier frequency offset

Active Publication Date: 2015-04-29
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a method and device for adjusting the carrier frequency of multi-transmit and multi-receive microwave equipment to solve the problem of carrier frequency deviation between different MIMO channels in the prior art

Method used

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  • Regulating method and apparatus carrier frequency of multiple transmit and multiple receive microwave apparatus
  • Regulating method and apparatus carrier frequency of multiple transmit and multiple receive microwave apparatus
  • Regulating method and apparatus carrier frequency of multiple transmit and multiple receive microwave apparatus

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Experimental program
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Embodiment 1

[0025] This embodiment provides a method for adjusting the carrier frequency of a multi-transmit and multi-receive microwave device. The network architecture applicable to this method is a split MIMO system or a split XPIC (Cross-polarization Interference Cancellation, cross-polarization interference canceller) system , each of which includes multiple ODUs and at least one IDU. The IDU can receive the IF signals sent by all ODUs, adjust the IF signals according to the frequency information of the RF reference crystal oscillator sent by the ODUs, and send the adjusted IF signals to the corresponding ODUs to finally adjust the output of each ODU. The purpose of the carrier frequency offset of the carrier signal. Wherein, the frequency of the carrier signal=the IF frequency of the IF signal sent by the IDU to the corresponding ODU+the radio frequency frequency of the ODU itself after frequency multiplication. In this embodiment, the IDU is used as an execution subject for descri...

Embodiment 2

[0044] Based on Embodiment 1, this embodiment provides a method for adjusting the carrier frequency of a multi-transmit and multi-receive microwave device.

[0045] In step 201, the IDU obtains the frequency and the first frequency multiplier of the radio frequency reference crystal oscillator of each ODU.

[0046] The specific implementation of this step can be consistent with Embodiment 1. For example, the IDU can directly receive the clock signal and the first frequency multiplier M of the radio frequency reference crystal oscillator sent by the ODU, and the IDU can directly obtain the radio frequency reference crystal according to the clock signal The RF frequency of the oscillator. It is also possible that the ODU uses a radio frequency reference crystal oscillator to directly generate a management information carrier, and the IDU extracts and restores the ODU clock from the management information carrier. Specifically, the management information carrier is f n ×N, in t...

Embodiment 3

[0058] Based on the above-mentioned embodiments, this embodiment specifically illustrates a method for adjusting the carrier frequency of a multi-transmit and multi-receive microwave device. In actual operation, the number of ODUs can be changed according to actual needs, for example, 5, 10 or even 20. Such as Figure 2A As shown, this embodiment takes two ODUs as an example for description.

[0059] In step 301, the IDU210 acquires the frequency f of the RF reference crystal oscillator sent by the first ODU211 1 , the first frequency multiplication number M and the second frequency multiplication number N, and obtain the frequency f of the radio frequency reference crystal oscillator sent by the second ODU212 2 , the first multiplication number M and the second multiplication number N.

[0060] In this embodiment, it is described by taking an example that the first frequency multiplication number M and the second frequency multiplication number N of two ODUs are equal. F...

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Abstract

The present invention provides a method and a device for adjusting a carrier frequency of a multiple-input multiple-output microwave device. The method includes: obtaining, by an indoor unit IDU, a frequency of a radio frequency-reference crystal oscillator and a first frequency multiplication factor of each outdoor unit ODU; selecting, by the indoor unit IDU, one of the frequencies of the radio frequency-reference crystal oscillator as a reference frequency; adjusting, by the indoor unit IDU, a carrier frequency of the multiple-input multiple-output microwave device according to the first frequency multiplication factor and a radio frequency offset between the reference frequency and the frequency of the radio frequency-reference crystal oscillator of each ODU. In the method and the device for adjusting the carrier frequency of the multiple-input multiple-output microwave device according to the present invention, each ODU sends information of the frequency of the radio frequency-reference crystal oscillator to the IDU, and the IDU adjusts an intermediate frequency according to an offset of the frequency of the radio frequency-reference crystal oscillator, thereby achieving the objective of adjusting a carrier frequency of the multiple-input multiple-output microwave device.

Description

technical field [0001] The invention relates to wireless communication technology, in particular to a method and equipment for adjusting the carrier frequency of multi-transmit and multi-receive microwave equipment. Background technique [0002] Multiple-Input Multiple-Out-put (MIMO) technology is a major breakthrough in antenna technology in the field of wireless communication, which can double the capacity and reliability of the system without increasing time and frequency resources. [0003] For split-type microwave equipment, it mainly consists of the following parts: antenna, ODU (Outdoor Unit, outdoor unit), intermediate frequency cable, and IDU (Indoor Unit, indoor unit). Among them, the antenna is used to receive the carrier signal sent by the ODU to increase the signal gain; the ODU is used for radio frequency processing to realize the signal conversion between the radio frequency and the intermediate frequency, and the intermediate frequency signal and the radio fr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/04
CPCH04L2027/0016H04W56/00H04W88/085H04B7/0413H04L7/033H04W72/0453
Inventor 骆彦行曾卓吕文龙刘余颜敏
Owner HUAWEI TECH CO LTD
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