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Device and method for eliminating local oscillator leakage

A technology of local oscillator leakage and local oscillator signal, applied in the transmission system, electrical components, etc., can solve the problems of local oscillator leakage and other problems, and achieve the effect of strong self-adaptation, good real-time performance, and low PCB layout difficulty

Inactive Publication Date: 2018-07-03
ZTE CORP
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  • Abstract
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Problems solved by technology

[0009] According to the solution provided by the embodiment of the present invention, the problem of local oscillator leakage in communication and testing equipment can be solved

Method used

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  • Device and method for eliminating local oscillator leakage
  • Device and method for eliminating local oscillator leakage
  • Device and method for eliminating local oscillator leakage

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Embodiment Construction

[0071] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described below are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0072] figure 1 is a schematic diagram of a device for eliminating local oscillator leakage provided by an embodiment of the present invention, as shown in figure 1 As shown, it includes: a coupler 101, which is used to extract the local oscillator leakage signal from the up-converted signal or down-converted signal output by the mixer, and obtain the local oscillator leakage signal; the amplitude detection and adjustment module 102 is used for according to the described The amplitude of the local oscillator leakage signal adjusts the amplitude of the local oscillator signal to obtain a local oscillator leakage amplitude cancellation signal equal to the a...

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Abstract

The invention discloses a device and method for eliminating local oscillator leakage and relates to the technical field of mobile communication. The device comprises a coupler for carrying out local oscillator leakage signal extraction processing on an up-conversion signal or a down-conversion signal output by a frequency mixer to obtain a local oscillator leakage signal; an amplitude detection and adjustment module used for carrying out amplitude adjustment on the local oscillator signal according to the amplitude of the local oscillator leakage signal to obtain a local oscillator leakage amplitude offset signal equal in amplitude with the local oscillator leakage signal; and a phase detection and adjustment module used for carrying out phase adjustment on the local oscillator leakage amplitude offset signal according to the phase of the local oscillator leakage signal to obtain a local oscillator leakage offset signal equal in amplitude but opposite in phase with the local oscillatorleakage signal.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a device and method for eliminating local oscillator leakage. Background technique [0002] With the development of wireless communication technology, mobile communication has almost occupied the market in the field of communication, including people-to-people, people-to-things, things-to-things, and the Internet of Everything has become an inevitable trend. Commonly used wireless communication signal frequencies range from hundreds of megahertz to several gigahertz. Due to the limited spectrum resources in the low frequency band, the spectrum of wireless communication signals in the future may be higher. Since the current application of RF sampling is limited by devices, the core of wireless communication at this stage is to convert the RF signal in the air into a baseband signal that can be processed by digital devices, that is, frequency conversion processing. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/525H04B1/403
CPCH04B1/403H04B1/525H04B1/04
Inventor 熊林江曲玉周马兴望陈豪林洁
Owner ZTE CORP
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