Method and device for testing XPIC performance of microwave transmission equipment

A microwave transmission and performance technology, applied in the field of communication, can solve problems such as lack of technology, and achieve the effect of simple test device and safe and reliable test results

Active Publication Date: 2020-09-29
CHINA ACADEMY OF INFORMATION & COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are already a number of patents that can be queried about the implementation of XPIC, but there has been a lack of corresponding technologies for the test verification and performance evaluation methods of XPIC functions.

Method used

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  • Method and device for testing XPIC performance of microwave transmission equipment
  • Method and device for testing XPIC performance of microwave transmission equipment
  • Method and device for testing XPIC performance of microwave transmission equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] First follow image 3 The simulation modeling of the pass-through polarization degraded board is carried out. In the simulation model, the base material of the printed circuit board is FR4 material, and the simulation is carried out by using the finite difference time domain method. The incident polarization is as follows: figure 2 In the main polarization direction, the depolarization effect is defined as the "electromagnetic field cross-polarization degeneration ratio" parameter such as figure 1 Medium electric field strength E VH and E VV ratio, where E VH and E VV Both take the root mean square value on the simulation plane. And set different angles between the unit axis and the cross isolation direction in the simulation, and observe the changes of the parameters. Simulation results such as Figure 7 shown. It can be seen that from 15 GHz to 85 GHz, all have polarization degradation characteristics, that is, have broadband characteristics, and the setting o...

Embodiment 2

[0076] First follow Figure 8 Carry out the simulation modeling of the pass-through polarization degraded plate. In the simulation model, the base material of the printed circuit board is FR4 material. This is a relatively simple periodic structure arrangement of elliptical units. The ratio of the major axis to the minor axis of the ellipse is 4 : 1, the length of the minor axis is 0.25 times the wavelength of the applicable operating frequency, the simulation is performed using the finite difference time domain method, the incident polarization is vertical polarization, and different angles between the unit axis and the cross isolation direction are set in the simulation, and the observation parameter changes. The simulation results of "Vertical Polarization Coupling Interference Ratio" are as follows: Figure 9 shown. It can be seen that from 15 GHz to 85 GHz, all have polarization degradation characteristics, that is, have broadband characteristics, and the setting of the...

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Abstract

The invention provides a method and a device for testing the XPIC performance of microwave transmission equipment, relates to the technical field of communication, and aims at effectively testing theXPIC performance of the microwave transmission equipment, the testing device is simple, and the testing result is safe and reliable. The device comprises: a transmitting device and a receiving deviceto be tested, which are used for transmitting and receiving microwave signals; a pass-type polarization degradation plate which is arranged between the transmitting device and the receiving device andis used for carrying out degradation separation on the electromagnetic waves to separate the electromagnetic waves into two electromagnetic wave signals with different polarization directions; a network performance analyzer V which is used for measuring the receiving power of the receiving device in the vertical polarization direction, wherein the network performance analyzer H is used for measuring the receiving power of the receiving device in the horizontal polarization direction, and the polarization coupling interference ratio is calculated according to the measured receiving power and is used for analyzing the XPIC performance of the microwave transmission equipment. The technical scheme provided by the invention is suitable for the XPIC performance test process of the microwave transmission equipment.

Description

【Technical field】 [0001] The invention relates to the field of communication technology, in particular to a method and device for testing the XPIC performance of microwave transmission equipment. 【Background technique】 [0002] In wireless mobile communication systems, microwave transmission equipment is very critical and is an important component of the transmission network. XPIC is a function of microwave transmission equipment. The full name of XPIC in English is Cross Polarization Interference Cancellation, that is, cross polarization interference cancellation. It is a technology used in conjunction with CCDP (common channel dual polarization). CCDP uses two orthogonal polarized waves to transmit signals to double the transmission capacity, while XPIC is used to eliminate cross-interference between the two polarized waves. Ideally, the two co-frequency microwave signals of CCDP are orthogonal signals, there will be no interference between them, and the receiver can easi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/02H04B7/00H04B17/345
CPCH04W24/02H04B7/002H04B17/345
Inventor 周峰成锴纪锐沈岸平张诚张颖艳张大元
Owner CHINA ACADEMY OF INFORMATION & COMM
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