Method for controlling VSAT satellite communication L-band down converter

A frequency converter control and satellite communication technology, which is applied in the field of satellite communication, can solve problems such as time-consuming, labor-intensive, and error-prone, and achieve the effect of improving operational reliability and speed and shortening parameter adjustment time

Inactive Publication Date: 2013-04-03
CHENGDU LINHAI ELECTRONICS
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Problems solved by technology

[0004] At present, the use of satellite communication has been widely used as a means of radio and television transmission coverage in China. According to the IEEE 521-2002 standard, the L-band refers to the radio wave band with a frequency of 1-2 GHz. The down-converter of the satellite communication L-band...

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  • Method for controlling VSAT satellite communication L-band down converter
  • Method for controlling VSAT satellite communication L-band down converter

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Embodiment Construction

[0033] The specific embodiment of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0034] The down-converter is to shift down the frequency of the downlink signal transmitted by the satellite with a high frequency received. According to the IEEE 521-2002 standard, the L-band refers to the radio wave band with a frequency of 1-2 GHz. The down-converter in the VSAT terminal will The entire working frequency band is down-changed to commonly used lower frequencies, such as 70MHz, 140MHz and other intermediate frequencies, and then demodulates the signal.

[0035] After the VSAT satellite communication L-band downconverter receives the high-frequency downlink signal transmitted by the satellite, it first passes through the preselector to select the frequency band of the received signal, and then passes through the first and second frequency conversion modules to perform two frequency upshifts. Output to the intermediat...

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Abstract

A method for controlling a VSAT (Very Small Aperture Terminal) satellite communication L-band down converter, comprising the following steps of: step 1, system initialization; step 2, entering the waiting state; and if an input command is detected in the waiting state, starting step 3; step 3, command determination, and if the determination is true, starting step 4, otherwise, returning to the step 2; step 4, command processing; and step 5, control event processing, and returning to the step 2 if the operation on the down converter is finished. The control event processing in the step 5 comprises processing of the following events: preselector setting, medium-frequency bandwidth setting, AGC/MGC (Automatic Gain Control/Manual Gain Control) control, first local oscillator frequency control and second local oscillator frequency control. With the method for controlling the VSAT satellite communication L-band down converter provided by the invention, smart control is realized for receiving of the input instruction, automatic control of related modules of the down converter, and corresponding parameter adjustment; real-time operation is realized for the input instructions; the parameter adjustment time is shortened; and the operation reliability and keenness of the down converter are enhanced.

Description

technical field [0001] The invention belongs to the field of satellite communication, and relates to a control method of a VSAT satellite communication L-band down converter. Background technique [0002] VSAT (Very Small Aperture Terminal, Very Small Aperture Antenna Earth Station) for satellite communication has the characteristics of strong flexibility, high reliability, convenient use, and small stations can be directly installed on the user end. Using VSAT user terminals can be directly connected to the computer network, Complete communication tasks such as data transfer, file exchange, and image transmission, thus getting rid of the problem of long-distance communication ground interruption stations. So it is a good choice to use VSAT as a dedicated long-distance communication system. The so-called small aperture specifically refers to the small aperture of the satellite signal receiving antenna, usually only 1.2 to 2.4 meters. [0003] In VSAT satellite communicatio...

Claims

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Application Information

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IPC IPC(8): H04B7/185H04L1/00
Inventor 吴伟林杨宇航吴博陈春梅何戎辽
Owner CHENGDU LINHAI ELECTRONICS
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