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Double-quadrature scrambling modulation transmission method

A transmission method and bi-orthogonal technology, applied in the fields of transmission technology and communication technology, can solve the problem that the waveform security cannot be effectively guaranteed on the transmission channel.

Inactive Publication Date: 2009-01-21
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the security of the waveform on the transmission channel cannot be effectively guaranteed

Method used

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  • Double-quadrature scrambling modulation transmission method
  • Double-quadrature scrambling modulation transmission method
  • Double-quadrature scrambling modulation transmission method

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Embodiment Construction

[0026] Taking the Legendre polynomial as an example, the general expression of the Rodrik form of the Legendre polynomial defined in the interval [-1, 1], h(x)≡1 is:

[0027] P n ( x ) = 1 n ! 2 n [ ( x 2 - 1 ) n ] ( n )

[0028] It can be seen that the Legendre function system is weighted orthogonal and non-periodic.

[0029] has a function f ( x ) = 1 ...

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Abstract

The present invention relates to a modulation and transmission method of biorthogonal interference, and is applied in the field of communication, so as to enhance the security of communication system. In the generalized Fourier series, the method adopts an algorithm of inverse transform to acquire the biorthogonal function family from a basis function; two groups of functions in the biorthogonal function family are respectively used at the receiving end and the transmitting end of the transmission system. The receiving end adopts one group of functions to complete the interference modulation of the signals; the receiving end adopts the other group of functions to complete the interference decomposition of the received signals, so as to acquire the information. The method can be used in the transmission system.

Description

1. Technical field [0001] The invention relates to a new method of transmission technology in a wireless communication system, which can improve communication security and belongs to transmission technology and communication technology. 2. Background technology [0002] The secure transmission of information in communication systems is increasingly concerned. At the same time, parallel transmission is one of the methods to increase the transmission rate and realize broadband. [0003] Under the general concept, parallel transmission is realized by using multiple orthogonal functions in a certain orthogonal system. For example, CDMA is orthogonal in the code space; and these carriers in the multi-carrier system are orthogonal to each other in the frequency domain; TDMA system uses the orthogonality between time slots in the time domain to carry out multi-user communication. At the receiving end, the information of each transmission is obtained by using the mutually orthogon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J11/00H04L27/32
Inventor 陈月云吕文强
Owner UNIV OF SCI & TECH BEIJING
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