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Fast frequency hopping-based multi-carrier spread spectrum method

A multi-carrier and frequency hopping technology, applied in the field of multi-carrier spread spectrum technology, can solve the problems of code division multiple access, confidentiality and anti-interference without advantages, etc., to improve anti-interference ability, good confidentiality and security, Hard to intercept effects

Inactive Publication Date: 2016-10-26
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, ordinary FFH-OFDM does not include spread spectrum, so it does not have advantages in code division multiple access, confidentiality, and anti-interference compared with traditional OFDM

Method used

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  • Fast frequency hopping-based multi-carrier spread spectrum method
  • Fast frequency hopping-based multi-carrier spread spectrum method
  • Fast frequency hopping-based multi-carrier spread spectrum method

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Embodiment Construction

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0032] On the basis of the original MC-DS-CDMA technology, the present invention proposes a multi-carrier spread spectrum technology based on fast frequency hopping in combination with the FFH-OFDM technology. The specific steps of the scheme are as follows:

[0033] Transmitter part:

[0034] Step 1: Modulate the original signal, and the modulation method may be PSK or QAM.

[0035] Step 2, serial-to-parallel conversion, the modulated signal is serial-to-parallel converted into M channels of parallel signals.

[0036] Step 3, direct spread spectrum in the time domain, using the same spread spectrum sequence to carry out direct spread spectrum respectively on M parallel signals with the same spread spectrum code, such as shown.

[0037] Step 4: FFH mapping. The FFH mapping module performs fast frequency hopping on the signal according to the preset freque...

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Abstract

The invention belongs to the communication technological field and relates to a multi-carrier direct sequence spread spectrum code division multiple access (MC-DS-CDMA) and FFH (fast frequency hopping)-OFDM (orthogonal frequency division multiplexing)-based multi-carrier spread spectrum technology, in particular, a fast frequency hopping-based multi-carrier spread spectrum method. According to the method, the common features of MC-DS-CDMA and FFH-OFDM are considered, and the weakness of the inexistence of frequency diversity gain of a traditional MC-DS-CDMA is avoided. The fast frequency hopping-based multi-carrier spectrum spreading method is advantageous in fading resistance, interference resistance, code division multiple access and communication confidentiality.

Description

technical field [0001] The invention belongs to the technical field of communication, in particular to a multi-carrier spread spectrum technology based on multi-carrier direct sequence spread spectrum code division multiple access (MC-DS-CDMA) and FFH-OFDM. Background technique [0002] With the development of OFDM and spread spectrum communication, a new communication technology - multi-carrier spread spectrum technology has emerged. This technology combines OFDM technology and spread spectrum technology, and takes into account the advantages of the two technologies in anti-multipath, anti-interference, code division multiple access, and confidentiality, and has become a hot spot in current communication technology research. According to its structure and the different forms of spread spectrum, it can be roughly divided into four types: MC-CDMA, MC-DS-CDMA, MT-CDMA, and two-dimensional spread spectrum technology. Among them, MC-DS-CDMA is a time-domain spread spectrum tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04B1/7143
CPCH04B1/7143H04L27/2628H04L27/265
Inventor 窦衡王玄马晓双魏子棱蔡得泉
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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