Wireless aviation burst communication system

A burst communication, wireless technology, applied in wireless communication, multiplexing communication, baseband system components and other directions, can solve the problem of carrier frequency offset sensitivity, poor threshold setting, need dynamic judgment, etc., to achieve parameter estimation Simple, reduce the difficulty of extraction, and ensure the effect of autocorrelation performance

Active Publication Date: 2015-08-19
CHINESE AERONAUTICAL RADIO ELECTRONICS RES INST
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AI Technical Summary

Problems solved by technology

This method is sensitive to carrier frequency offset, requires dynamic judgment, and the threshold is not easy to set

Method used

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  • Wireless aviation burst communication system
  • Wireless aviation burst communication system
  • Wireless aviation burst communication system

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Embodiment Construction

[0040] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0041] like figure 1 As shown, the difference between the aeronautical wireless burst communication system of the present invention and the continuous communication system lies in burst frame construction, burst signal detection, timing carrier parameter estimation and recovery. The invention mainly includes a burst frame building module at the transmitting end, a receiving digital front-end processing module at the receiving end, a burst detector, a carrier wave, a phase parameter extraction and recovery module, and a timing parameter extraction and recovery module. By encoding the information source and constructing burst frames, and through symbol mapping and front-end processing, the burst transmission of information is completed; the ADC input signal for band-pass sampling is initially down-converted and filtered to obtain frequency offs...

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Abstract

The invention discloses a wireless aviation burst communication system, which comprises a burst frame construction module, a receiving digital front-end processing module, a burst detector, a carrier and phase parameter extraction and recovery module, and a timing parameter extraction and recovery module, wherein the burst frame construction module is used for constructing a burst frame, and the burst frame is composed of an AGC training sequence, two identical repeated CAZAC training sequences, and a data block; the receiving digital front-end processing module is used for acquiring an initial demodulation signal with frequency offset, phase offset and timing errors; the burst detector is used for adopting the repeated CAZAC training sequences for carrying out matched filter on the initial demodulation signal, acquiring a burst sign and outputting two related peak values and related peak sidelobe values; the carrier and phase parameter extraction and recovery module is used for estimating carrier and phase parameters and completing recovery; and the timing parameter extraction and recovery module completes timing recovery. The burst frame detection probability can be effectively improved, and complexity of burst communication carrier, phase and timing recovery is reduced.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a method for realizing burst signal detection, timing and carrier synchronization parameter estimation of aeronautical wireless communication. Background technique [0002] The burst communication system is a wireless communication system that transmits information in a short period of time. Due to the short exposure time of the signal during transmission, the probability of communication signals being detected and intercepted is effectively reduced, thereby improving the anti-jamming capability of the communication system. The characteristics of burst communication determine that it is difficult to achieve carrier synchronization and timing synchronization through the feedback loop in such systems. To demodulate information at the burst communication receiving end, it must first perform burst signal detection, and then proceed after detecting the arrival of the signa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02H04J13/00
CPCH04J13/0059H04W24/00
Inventor 夏高峰邹星李金喜周续孙军奎周茹
Owner CHINESE AERONAUTICAL RADIO ELECTRONICS RES INST
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