Method for testing satellite mobile communication terminal digital up-converter

A technology of satellite mobile communication and digital up-conversion, which is applied in the field of satellite mobile communication, can solve problems such as the lack of verification methods for test function indicators, and achieve the effect of guaranteed performance

Inactive Publication Date: 2012-08-01
CHENGDU LINHAI ELECTRONICS
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  • Description
  • Claims
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Problems solved by technology

[0005] The purpose of the present invention is to provide a test method for digital upconverters of satellite mobile communication terminals, to solve the ...

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  • Method for testing satellite mobile communication terminal digital up-converter
  • Method for testing satellite mobile communication terminal digital up-converter
  • Method for testing satellite mobile communication terminal digital up-converter

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Embodiment Construction

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0046] In the satellite communication system, electromagnetic waves are transmitted in space. Since the frequency band suitable for space communication is 1GHz-10GHz, this frequency band is generally called the radio window. This frequency is called radio frequency at the earth station. The signal from the terminal user on the ground is a digital baseband signal, which cannot be directly transmitted in space. If the signal is directly modulated and demodulated on t...

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Abstract

The invention discloses a method for testing a satellite mobile communication terminal digital up-converter. A PC (Personal Computer) machine is connected with an FPGA (Field Programmable Gate Array) in the digital up-converter, the FPGA is controlled to generate I/Q (In-phase/Quadrature) data of an analog baseband signal and the I/Q data is input into an AD9957 chip to be converted into an analog signal to output; the analog signal output by the AD9957 chip enters an SAW (Surface Acoustic Wave) filter by a first RF (Radio Frequency) transformer and a first spectrum analyzer is connected between the first RF transformer and the SAW filter; and an output signal of the SAW filter enters an AD8370 chip by a second RF transformer, an output signal of the AD8370 chip is output by a third RF transformer and a second spectrum analyzer is connected to the output end of a third RF amplifier. By utilizing testing equipment such as the PC machine, the spectrum analyzers and the like, various functional indexes of the digital up-converter can be well tested and whether the indexes meet the design requirements is judged, so that the performance of the satellite mobile communication terminal digital up-converter is ensured.

Description

technical field [0001] The invention relates to the field of satellite mobile communication, in particular to a testing method for a digital up-converter of a satellite mobile communication terminal. Background technique [0002] In the digital upconverter of the satellite mobile communication terminal based on software radio, modularization and reconfigurability, the low frequency part of the digital radio system adopts a digital circuit. Compared with the traditional radio system, the A / D and D / A of the software radio system The transform is moved to the IF and as close as possible to the RF side. The software defined radio replaces the dedicated digital circuit with powerful programmable FPGA and DSP devices, making the system hardware structure and function relatively independent. In this way, based on a relatively common hardware platform, different communication functions can be realized through software, and the operating frequency, system bandwidth, modulation mode,...

Claims

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Application Information

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IPC IPC(8): H04B7/185
Inventor 吴伟林李承镛杨宇航吴博宋慧
Owner CHENGDU LINHAI ELECTRONICS
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