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Method and device for calibrating downlink radio frequency

A calibration, radio frequency technology, applied in transmitter monitoring, transmission monitoring, power management and other directions, can solve problems such as increasing system cost and power consumption, interfering with radio frequency links, etc., to shorten startup time, reduce radio frequency interference, reduce cost effect

Active Publication Date: 2010-06-09
ZTE CORP
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Problems solved by technology

[0006] The present invention is proposed to solve the problem of interfering with the radio frequency link, increasing the cost and power consumption of the system due to the increase of the external memory to store the signal source in the related art. Therefore, the main purpose of the present invention is to provide an improved downlink radio frequency calibration scheme to address at least one of the above

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  • Method and device for calibrating downlink radio frequency
  • Method and device for calibrating downlink radio frequency
  • Method and device for calibrating downlink radio frequency

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Embodiment Construction

[0028] Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0029] It should be noted that the steps shown in the flowcharts of the accompanying drawings may be performed in a computer system, such as a set of computer-executable instructions, and that although a logical order is shown in the flowcharts, in some cases, The steps shown or described may be performed in an order different than here.

[0030] Below in conjunction with accompanying drawing, the implementation of technical scheme is described in further detail:

[0031] method embodiment

[0032] According to an embodiment of the present invention, a downlink radio frequency calibration method is provided, and the method realizes automatic downlink calibration of an RRU.

[0033] figure 1 It is...

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Abstract

The invention discloses a method and a device for calibrating downlink radio frequency. In the method, when a system is powered up and enters an automatic calibration state, forward power detection values of a source signal transmitted by an upstream system and feedback power detection values of a feedback signal related to the source signal are acquired for multiple times; a mean value of the forward power detection values and the feedback power detection values acquired for multiple times is calculated; and a gain value of a digital to analog converter and / or a gain value of a numerical control attenuator is regulated according to the mean value. Through the method and the device, radio frequency interference generated by an internal memory can be reduced, and the cost of the system can be reduced.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a downlink radio frequency calibration method and device. Background technique [0002] According to the duplex mode, the existing communication system can be divided into Frequency Division Duplex (FDD for short) and Time Division Duplex (TDD for short) systems. The TDD system can be further divided into a base band unit (Base Band Unit, referred to as BBU) and a radio frequency unit (Radio Remote Unit, referred to as RRU). [0003] In the RRU of TDD, it is necessary to calibrate the transmission power of the system antenna port. At present, the calibration methods mainly include: manual calibration and automatic calibration. Among them, manual calibration is a way of manually triggering calibration, and automatic calibration is a way of automatically triggering calibration by the system. In the prior art, since the automatic calibration is completed automatically...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/04H04W52/14
CPCH04B17/0005H04W24/04H04B17/11
Inventor 张烈
Owner ZTE CORP
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