Low false alarm and low false dismissal burst signal capturing method

A burst signal, low false alarm technology, applied in the field of satellite burst communication, can solve the problems of increased probability of miscapture and frame loss, limited capture signal range, and unsatisfactory, so as to improve stability and reliability, reduce The effect of working signal-to-noise ratio threshold and reducing the probability of missed detection

Active Publication Date: 2010-03-10
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology

This method is simple, but the range of captured signals is limited and cannot meet the 10dB dynamic range we require, and the number of symbols used for signal energy calculation is relatively large, which is more suitable for continuous signal capture
The second is dynamic ca

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  • Low false alarm and low false dismissal burst signal capturing method
  • Low false alarm and low false dismissal burst signal capturing method
  • Low false alarm and low false dismissal burst signal capturing method

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[0015] refer to figure 1 , figure 1 It is an electrical principle block diagram of an embodiment of the present invention, including a burst detection module 1, a timing recovery module 2, a carrier recovery module 3, and a unique code detection module 4, and the embodiment is according to figure 1 Connect the lines. The present invention adopts the preamble sequence of the burst signal of the burst satellite communication system and the unique code in MF-TDMA communication, adopts the preamble sequence of the burst signal and the unique code detection technology, and detects the preamble sequence of the burst signal, restores timing, Carrier recovery and unique code detection enable burst signal capture with low false alarm and low missed detection.

[0016] The present invention comprises steps as follows:

[0017] ① Input the baseband signal of the matched filter into the burst detection module 1, and the burst detection module 1 uses a correlation detection algorithm to...

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Abstract

The invention discloses a low false alarm and low false dismissal burst signal capturing method, relating to the capture of burst signals in the satellite burst communication field. The low false alarm and low false dismissal burst signal capturing method comprises the following steps: adopting a leader sequence of a burst signal of a satellite burst communication system and unique words in MF-TDMA communication and realizing the false alarm and low false dismissal capture of the burst signal through detection of the leader sequence of the burst signal, timing recovery, carrier recovery and unique word detection. The low false alarm and low false dismissal burst signal capturing method still has the advantages of enhancing the stability of the MF-TDMA satellite communication system, reducing the working signal-to-noise threshold of the MF-TDMA satellite communication system and the like, and is especially suitable for capturing burst signals of the MF-TDMA satellite communication system.

Description

technical field [0001] The invention relates to a method for capturing burst signals with low false alarm and low missed detection in the field of satellite burst communication, and is especially suitable for MF-TDMA satellite communication systems, and can also be used for burst signal capture in other burst communication systems . Background technique [0002] There are several methods for signal capture in burst communication: one is to fix the capture threshold: calculate the energy value of the signal, and consider the signal to arrive when it exceeds the set threshold. This method is simple, but the range of capturing signals is limited and cannot meet the 10dB dynamic range we require, and the number of symbols used for signal energy calculation is relatively large, which is more suitable for capturing continuous signals. The second is dynamic capture threshold: the threshold value for judging signal arrival is dynamic and automatically adjusted according to the stre...

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Application Information

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IPC IPC(8): H04B7/26H04W84/06
Inventor 郝学坤李辉王利军刘冀岳田张鹏宗陈艳丽张江伟
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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