Unlock instant, AI-driven research and patent intelligence for your innovation.

A Burst Signal Detection and Carrier Synchronization Method under Rotor Shading

A burst signal and carrier synchronization technology, applied in the field of satellite communication, can solve problems such as low link signal-to-noise ratio, large Doppler dynamics, rotor occlusion, etc., to achieve strong versatility, guaranteed performance, and convenient satellite link automatic Adapting to Communication Effects

Active Publication Date: 2022-03-04
XIAN INSTITUE OF SPACE RADIO TECH
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, to provide a method for burst signal detection and carrier synchronization under the cover of the rotor, and to solve the problem of large Doppler dynamics and link signal noise in helicopter satellite communications. Problems such as low ratio and rotor occlusion

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Burst Signal Detection and Carrier Synchronization Method under Rotor Shading
  • A Burst Signal Detection and Carrier Synchronization Method under Rotor Shading
  • A Burst Signal Detection and Carrier Synchronization Method under Rotor Shading

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] A burst signal detection and carrier synchronization method under the shielding of a rotor, comprising: burst signal detection, frequency offset and frequency change rate estimation, and phase offset estimation.

[0039] Burst signal detection: In order to improve the detection performance under high Doppler dynamic conditions, after the received signal is conjugated with the local pilot code and demodulated, the frequency change rate is preset in partitions, and the K-channel parallel spectrum peak characteristic detection is performed;

[0040] Frequency offset and frequency change rate estimation: The frequency offset and frequency change rate iterative estimation method is used to improve the frequency offset estimation accuracy and complete the frequency change rate estimation. The specific steps are: ① Divide the pilot signal into two segments, and use the data-assisted frequency offset estimation algorithm to obtain the frequency offset and ② Use the differenc...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a burst signal detection and carrier synchronization method under the cover of a rotor, belonging to the technical field of satellite communication. The method of the invention includes: burst signal detection, frequency offset and frequency change rate estimation, and phase offset estimation. The present invention completes burst signal detection and carrier synchronization sequentially based on dispersedly inserted pilot symbols, solves the problem of signal reception under conditions of high Doppler dynamics, low link signal-to-noise ratio, and rotor occlusion, and has wide application in helicopter satellite communications application prospects.

Description

technical field [0001] The invention relates to a burst signal detection and carrier synchronization method under the cover of a rotor, belonging to the technical field of satellite communication. Background technique [0002] Helicopter satellite communication refers to the direct communication between the helicopter and the satellite through the onboard satellite equipment. It is characterized in that the helicopter does not need the ground relay station for relay and forwarding in the communication, and is not affected by the ground fluctuation, so it can carry out information transmission in a wider area. . In satellite communication systems, Doppler frequency shift is an important factor affecting communication performance. Due to the relative motion between the satellite platform and the ground terminal, its radial motion speed produces the Doppler effect, which leads to the Doppler frequency shift of the signal at the receiving end. For a helicopter with high maneuv...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/185
CPCH04B7/18519
Inventor 王大庆龚险峰刘明洋惠腾飞
Owner XIAN INSTITUE OF SPACE RADIO TECH