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A Satellite Communication Burst Acquisition System

A technology of satellite communication and burst signal, which is applied in the field of satellite communication, can solve the problem of false alarm or missed detection of the signal-to-noise ratio of the received signal, and achieve the effect of capturing a low false alarm rate

Active Publication Date: 2018-08-14
CHENGDU GUOHENG SPACE TECH ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology can adapt to the situation of large differences in received signal power, but there are false alarms or missed detections when the signal-to-noise ratio of the received signal is low

Method used

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  • A Satellite Communication Burst Acquisition System
  • A Satellite Communication Burst Acquisition System
  • A Satellite Communication Burst Acquisition System

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Experimental program
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Embodiment Construction

[0029] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0030] Such as figure 1 As shown, in the time-division multiple access satellite communication system, the receiver first performs analog-to-digital conversion on the received signal, and then inputs it into the capture system after filtering and rate adaptation. The acquisition system is used to complete the acquisition or detection of burst signals.

[0031] Such as figure 2 As shown, a satellite communication burst acquisition system includes a training operation unit, a threshold operation unit, a signal detection unit and a judgment unit.

[0032] The training calculation unit is used to perform training calculation on the received signal sequence and the local known unique code sequence, and output the calculation result.

[0033]...

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Abstract

The invention discloses a satellite communication burst capturing system including a training operation unit, a threshold operation unit, a signal detection unit, and a determination unit, the training operation unit performs training calculation of the received signal sequence and a known unique code sequence and outputs the calculation result, the threshold operation unit solves the adaptive threshold based on the received signal sequence and outputs the captured threshold, the signal detection unit detects the arrival and the disappearance of the burst signal based on the received signal sequence and outputs the burst signal detection result, and the determination unit determines whether a burst signal is captured based on the calculation result, the captured threshold, and the burst signal detection result, if the burst signal is captured, the captured identification is output. The satellite communication burst capturing system can accurately capture the burst signal of large frequency deviation and large signal power difference, and is low in false alarm probability when the signal to noise ratio is low.

Description

technical field [0001] The invention relates to the technical field of time division multiple access satellite communication, in particular to a satellite communication burst acquisition system. Background technique [0002] Time Division Multiple Access (TDMA) satellite communication system uses burst mode communication. The performance of the burst capture module at the receiving end directly determines the performance of the TDMA system, and even determines whether the TDMA system can communicate. [0003] In the time division multiple access satellite communication system, due to the influence of channel fading, clock independence of transceiver sites, relative motion between the ground station and the satellite, and clock independence between ground stations, the receiving end passes through a low-noise modular down-converter ( The signal after LNB) down-conversion has a large frequency deviation (the frequency deviation can even reach 1 / 3 of the symbol rate), and a lo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/30
CPCG01S19/30
Inventor 赵深林邹刚朱南丁伟
Owner CHENGDU GUOHENG SPACE TECH ENG CO LTD