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A Multi-Carrier Spread Spectrum Method Based on Fast Frequency Hopping

A multi-carrier, spread spectrum 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

Inactive Publication Date: 2019-03-29
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • A Multi-Carrier Spread Spectrum Method Based on Fast Frequency Hopping
  • A Multi-Carrier Spread Spectrum Method Based on Fast Frequency Hopping
  • A Multi-Carrier Spread Spectrum Method Based on Fast Frequency Hopping

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Embodiment Construction

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0035] 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:

[0036] Transmitter part:

[0037] Step 1: Modulate the original signal, and the modulation method may be PSK or QAM.

[0038] Step 2, serial-to-parallel conversion, the modulated signal is serial-to-parallel converted into M channels of parallel signals.

[0039] 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.

[0040] 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 technical field of communication, and in particular relates 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. A multi-carrier spread spectrum method based on fast frequency hopping, which takes into account the common characteristics of MC-DS-CDMA and FFH-OFDM, avoids the weakness of traditional MC-DS-CDMA without frequency diversity gain, and is effective in anti-fading, It has certain advantages in anti-interference, 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 Patents(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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