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New communication method of combined spread spectrum

A spread spectrum and communication device technology, applied in multiplex communication, multi-frequency code system, code division multiplexing system, etc., can solve the problem of inflexible spread spectrum gain design, high sampling rate, uneven spectrum, etc. question

Inactive Publication Date: 2004-09-22
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0009] (1) The spread spectrum is not uniform, and it is easy for the enemy to detect the specific value of some modulation parameters; (2) It is difficult to realize when the spread spectrum gain is high; (3) The design of the spread spectrum gain is not flexible; (4) The sampling rate is too high during digital reception; (5) The implementation of adaptive interference suppression is complicated

Method used

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  • New communication method of combined spread spectrum
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  • New communication method of combined spread spectrum

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Embodiment Construction

[0090] The main innovation of the transmitting part of the present invention is a joint spread spectrum communication system formed by combining two-dimensional spread spectrum, frequency hopping and time hopping spread spectrum methods, wherein frequency hopping spread spectrum and time hopping spread spectrum are existing spread spectrum method, the matrix expression (8) of the two-dimensional spread spectrum method is:

[0091] f ( t ) = sβUαp 2 P T b ( t ) - - - ( 8 )

[0092] Equation (8) can be realized by programming, and the existing technology can be used to make corresponding hardware to realize the process of two-dimensional spread spectrum; then, combined with the existing spread spec...

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Abstract

The present invention uses discrete multicarrier spread spectrum, direct sequential spread spectrum and inverse dicrete Fourier transformation to form a two-dimensional spread spectrum module, and the two-dimensional spread spectrum module, frequency hopping and time hopping spread spectrum are used to form the emission part of the united extending spectrum communication method. The inverse discrete multicarrier, direct sequential despreading spectrum and discrete Fourier transformation are used to form a two-dimensional despreading spectrum module and two-dimensional despreading spectrum module, time dehopping and frequency dehopping unit are used to form the receiving part of the united extending spectrum communication method.

Description

technical field [0001] The invention belongs to the field of electromagnetic wave technology, such as wireless communication, optical communication, ultrasonic communication, wired communication and other related data transmission and processing technologies, and particularly relates to a communication device using spread spectrum. Background technique [0002] As is well known, spread spectrum communication devices are widely used in existing communication technologies. The traditional spread spectrum uses the method of multiplying the spread spectrum code and the original signal to expand the spectrum of the original signal. Therefore, the advantages of the communication device using the spread spectrum are: the widening of the spectrum means that the probability of intercepting the original signal is reduced; the enhancement of the anti-interference performance means the reduction of the communication bit error rate; Enhanced capabilities. [0003] The existing main met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/707H04L27/26
Inventor 唐友喜
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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