Check patentability & draft patents in minutes with Patsnap Eureka AI!

Assessment method and device of intermodulation interference

An intermodulation interference and to-be-evaluated technology, applied in the field of communication, can solve the problem of inability to evaluate the intermodulation interference of signals of different carrier bandwidths, and achieve the effect of ensuring safe operation and avoiding intermodulation interference.

Active Publication Date: 2010-02-24
ZTE CORP
View PDF0 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention is proposed for the problem that the intermodulation interference generated by signals with different carrier bandwidths cannot be evaluated. Therefore, the main purpose of the present invention is to provide an evaluation scheme for the intermodulation interference of GU mixed-mode systems to solve the above problems

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Assessment method and device of intermodulation interference
  • Assessment method and device of intermodulation interference
  • Assessment method and device of intermodulation interference

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Evaluate the impact of intermodulation interference on the base station side of the GU mixed-mode system on the GSM system. Combine below Figure 6 The flow of the implementation of this embodiment is described in detail.

[0059] As described in step S602, it is assumed that the transmit power of the GSM carrier is 43dBm and the frequency is 900MHz; the transmit power of the UMTS carrier is 43dBm and the center frequency is 902.6MHz. Divide the UMTS broadband bandwidth into 19 UMTS narrowband bandwidths, and the center frequency of each narrowband signal is 900.8, 901, ..., 904.4MHz, then the power on each UMTS narrowband bandwidth is 43-10×1g(19) = 30.2dBm.

[0060] As described in step S604, according to the IIP3 of the device, that is, the third-order cut-off point of the device input, the intermodulation distortion IMD3=43+30.2-2×IIP3=73.2-2×IIP3 (dBm) when the input signal is 43dBm and 30.2dBm .

[0061] As described in step S606, the 19 narrowband signals of ...

Embodiment 2

[0065] Evaluate the impact of intermodulation interference on the base station side of the GU mixed-mode system on the UMTS system, combined below Figure 6 The flow of the implementation of this embodiment is described in detail.

[0066] As described in step S602, it is assumed that the transmit power of the GSM carrier is 43dBm, the frequency is 900MHz, the transmit power of the UMTS carrier is 43dBm, and the center frequency is 902.6MHz. Divide the UMTS broadband bandwidth into 19 UMTS narrowband bandwidths, and the center frequency of each narrowband signal is 900.8, 901, ..., 904.4MHz, then the power on each UMTS narrowband bandwidth is 43-10×1g(19) = 30.2dBm.

[0067] As described in step S604, according to the IIP3 of the device, that is, the third-order cut-off point of the device input, the intermodulation distortion IMD3=43+30.2-2×IIP3=73.2-2×IIP3 (dBm) when the input signal is 43dBm and 30.2dBm .

[0068] As described in step S606, the 19 narrowband signals of U...

Embodiment 3

[0072] Evaluate the impact of intermodulation interference on the base station side of the GU mixed-mode system on other systems, combined below Figure 6 The flow of the implementation of this embodiment is described in detail.

[0073] As described in step S602, it is assumed that the transmit power of the GSM carrier is 43dBm and the frequency is 900MHz; the transmit power of the UMTS carrier is 43dBm and the center frequency is 902.6MHz. Divide the UMTS broadband bandwidth into 19 UMTS narrowband bandwidths, and the center frequency of each narrowband signal is 900.8, 901, ..., 904.4MHz, then the power on each UMTS narrowband bandwidth is 43-10×1g(19) = 30.2dBm.

[0074] As described in step S604, according to the IIP3 of the device, that is, the third-order cut-off point of the device input, the intermodulation distortion IMD3=43+30.2-2×IIP3=73.2-2×IIP3 (dBm) when the input signal is 43dBm and 30.2dBm .

[0075] As described in step S606, the 19 narrowband signals of UMT...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an assessment method and a device of intermodulation interference. The method comprises the steps: dividing the UMTS broad band bandwidth of a universal mobile communication system into a plurality of UMTS narrowband bandwidths with the same size according to the Global System Mobile communication (GSM) bandwidth; computing power on an MTS narrowband bandwidth; computing intermodulation distortion according to the power; computing an intermodulation product according to the power and the intermodulation distortion; judging whether the intermodulation product falls on the bandwidth of a system to be assessed or not; computing the intermodulation interference according to the intermodulation product falling on the bandwidth of the system to be assessed and determiningthe influence of the system to be assessed according to the intermodulation interference. The invention avoids the intermodulation interference and ensures the safe operation of the system.

Description

technical field [0001] The present invention relates to the field of communications, in particular to a method and device for evaluating intermodulation interference. Background technique [0002] In Global System of Mobile communication (GSM for short) and Universal Mobile Telecommunications System (UMTS for short) (ie, GU mixed-mode system), the mixed-mode system base station (Base Transceiver Station, referred to as BTS) can transmit GSM and UMTS carrier frequencies while using a transmitter and a power amplifier in the downlink. This kind of hardware sharing can greatly reduce the cost of BTS system equipment, and at the same time use frequency resources more effectively, bringing Considerable economic benefits. [0003] However, when two different frequency signals of GSM and UMTS act on the same nonlinear circuit, they will modulate each other and generate second-order intermodulation distortion (Intermodulation Distortion), third-order intermodulation distortion, etc...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H04W52/34H04B7/005
Inventor 黄伟芳郝瑞晶刘晓东王娟李光远
Owner ZTE CORP
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com