Tracking system of satellite-ground quantum communication link direction

A technology of quantum communication and link direction, which is applied in radio wave measurement system, transmission system, image communication, etc., can solve the problems of limited capture and tracking system tracking and aiming suppression bandwidth, limited effect of suppression measures, complex system composition, etc., to achieve tracking The effect of improving the aiming suppression bandwidth, overcoming the large delay of image processing, and suppressing interference

Active Publication Date: 2010-02-10
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

The internal operation delay of each functional module plus the data transmission delay between modules causes a large total signal delay in the closed loop of the system, reaching 3ms or even longer, which limits the tracking and targeting suppression bandwidth of the capture and tracking system
[0005] 2. No measures have been taken to suppress the interference of atmo

Method used

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  • Tracking system of satellite-ground quantum communication link direction
  • Tracking system of satellite-ground quantum communication link direction
  • Tracking system of satellite-ground quantum communication link direction

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[0021] combine figure 1 system structure and figure 2 A set of typical test data is taken as an example to illustrate the design and implementation method of the system and the specific functions of each sub-module. The example system uses the CYIL1SM0300AA CMOS image sensor as the quantum communication beacon detector, the EP2C20F256 FPGA is used as the overall control of the system, and the DA26LV31CM and DA26LV31CM422 differential interface chips are used to realize the transceiver bidirectional interface as the data transmission and command control interface. The high-speed DAC outputs tracking control analog signals in X and Y directions.

[0022] 1. The logic drive module provides the multi-channel drive signals required by the CMOS image sensor to complete the drive function of the sensor, so that the sensor can work normally and output image data.

[0023] 2. The specific fixed pattern (FPN) noise data of the CMOS image sensor is pre-stored in the FPGA, and the FPN ...

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Abstract

The invention discloses a tracking system of a satellite-ground quantum communication link direction, aiming at the application background of the high-precision beaconing tracking of satellite-groundquantum communication, and provides a real-time high-precision high-bandwidth beaconing detection and information acquiring system of FPGA hardware image processing and information extraction based ona CMOS or CCD detector and adopts an integrated design method. The invention also proposes a beaconing facula image processing method with the combination of facula shaping and position extraction, inhibits the interrupting influence of an atmosphere turbulence signal channel between a satellite and the ground on the beaconing facula, and improves the tracking and pointing precision, bandwidth and stability of a capturing tracking system. Under the condition that the atmosphere turbulence exists, the detection precision of the system on beaconing laser is better than 0.5 mu rad, and the detection bandwidth is higher than 2.5 kHz. The invention satisfies the requirement of the satellite-ground quantum communication capturing tracking system, in particular a satellite-carried terminal.

Description

technical field [0001] The invention belongs to the technical field of quantum communication, and specifically refers to a system for extracting and tracking the direction of a communication link, which is applied in satellite-to-earth quantum communication. Background technique [0002] Quantum communication has higher pointing accuracy requirements for communication links than conventional free-space laser communication. The Acquisition, Tracking and Targeting (ATP) system of satellite-to-earth quantum communication is used to establish a quantum communication link between quantum communication terminals, and must have very high tracking and targeting accuracy, bandwidth and stability. The communication link direction extraction and tracking sub-module of the capture tracking system must have higher performance. [0003] Currently known communication link direction extraction and tracking systems that use CCD or CMOS image sensors as detectors for inter-satellite quantum ...

Claims

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Application Information

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IPC IPC(8): H04B10/30H04N5/217G01S17/00H04B10/90
Inventor 王建宇林均仰舒嵘贾建军
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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