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Fast synchronizing device based on blind separation iterative reconstruction and suitable for scattering communication

A technology of iterative reconstruction and scatter communication, applied in the field of scatter communication, achieves the effect of low debugging difficulty

Active Publication Date: 2018-06-05
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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  • Application Information

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Problems solved by technology

At present, the existing synchronization algorithms mostly use filters, phase-locked loops and methods, which can only guarantee reliable synchronization when the normalized signal-to-noise ratio is greater than 0

Method used

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  • Fast synchronizing device based on blind separation iterative reconstruction and suitable for scattering communication
  • Fast synchronizing device based on blind separation iterative reconstruction and suitable for scattering communication
  • Fast synchronizing device based on blind separation iterative reconstruction and suitable for scattering communication

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Embodiment Construction

[0015] Attached below figure 1 , attached figure 2 And attached image 3 The present invention is described in further detail.

[0016] figure 1 It is a block diagram of the electrical principle of information transmission in the present invention, including an intermediate frequency amplifier 1, an A / D converter 2, an orthogonal downconverter 3, a blind separation iterative reconstruction bit synchronous interpolator 4, and a high-order transform domain fast carrier restorer 5. Local oscillator module 6, digital phase-locked loop 7, synchronous demodulator 8 and power supply 9;

[0017] The intermediate frequency signal processed by the antenna and the radio frequency receiving module enters the intermediate frequency amplifier 1, and the intermediate frequency amplifier amplifies the intermediate frequency signal of 0dBm, and sends the amplified analog intermediate frequency signal to the A / D converter 2; the A / D converter 2 receives After simulating the intermediate fr...

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Abstract

The invention discloses a fast synchronizing device based on blind separation iterative reconstruction and suitable for scattering communication; the device has advantages that troposphere scatteringcommunication has an anti-nuclear-explosion capability through a communication channel of the troposphere scattering communication and the scattering communication has strong anti-interference capability, high anti-interception capability and high anti-interception capability and accounts for an quite important location in an complex battlefield environment. In order to fully develop the communication performance of the scattering communication system under a fading channel and a extremely low signal-to-noise ratio, the method disclosed by the invention is mainly used for carrying out bit synchronization by adopting a blind separation iterative reconstruction bit synchronous interpolation device, and meanwhile, carrying out carrier synchronization by adopting a high-order transformation domain fast carrier recovery algorithm; the two algorithms are combined to enable the scattering communication system to be rapidly and reliably synchronized when the normalized signal-to-noise is -6dB.The device is mainly a digital algorithm, is realized by adopting an FPGA and is high in integration degree and high in universality.

Description

technical field [0001] The present invention relates to the field of scatter communication, and in particular discloses a fast synchronization device based on blind separation iterative reconstruction suitable for minimal scatter communication, which can be implemented in a scatter communication system under fading channels and extremely low signal-to-noise ratios bit synchronization and carrier synchronization. Background technique [0002] In scatter communication, because scatter communication has the advantages of reliable and long-term channel resources, no payment, anti-jamming, anti-interception, and strong anti-reconnaissance capabilities, it occupies a very important position in complex battlefields. At present, most of the existing synchronization algorithms use filters, phase-locked loops and methods, which can only guarantee reliable synchronization when the normalized signal-to-noise ratio is greater than zero. In order to give full play to the system performan...

Claims

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Application Information

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IPC IPC(8): H04L7/033
CPCH04L7/033
Inventor 沈斌松温亚萍
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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