Method for achieving deep spread spectrum and coherent fast frequency hopping based on DAGC diversity combining

A frequency hopping and spread spectrum technology, applied in the field of anti-interference, can solve the problems of inappropriate, non-coherent demodulation and diversity performance loss, difficult to maintain carrier phase continuity, etc., to improve the signal-to-noise ratio and enhance the anti-interference ability. Effect

Inactive Publication Date: 2013-11-27
BEIJING INSTITUTE OF TECHNOLOGYGY
View PDF3 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The traditional fast frequency hopping system is difficult to maintain the continuity of the carrier phase when the frequency of the frequency hopping frequency hops, so the traditional fast frequency hopping system mostly uses the non-coherent diversity combination and demodulation method of MFSK. The non-coherent combina

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for achieving deep spread spectrum and coherent fast frequency hopping based on DAGC diversity combining
  • Method for achieving deep spread spectrum and coherent fast frequency hopping based on DAGC diversity combining
  • Method for achieving deep spread spectrum and coherent fast frequency hopping based on DAGC diversity combining

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0081] The present invention will be further described below in conjunction with an example.

[0082] Assume a BPSK modulation depth spread spectrum and coherent fast frequency hopping hybrid spread spectrum communication system, the source information rate is 20Kbps, the direct spread pseudo code rate is 20Mcps, the frequency hopping rate is 100000hop / s, the total number of frequency hopping points is 2048, and the frequency hopping frequency The point interval is 100KHz. The spread spectrum ratio of the system is 1000, each source information bit has 5 frequency hopping frequency points, and the system sampling rate is 5 times of the symbol rate. For the convenience of discussion, it is assumed that the source sequence length is 32 bits.

[0083] The specific processing steps are as follows:

[0084] Step 1. Coherent fast hop spread signal modulation

[0085] According to the signal modulation process at the transmitter end, it is divided into the following steps:

[008...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a method for achieving deep spread spectrum and coherent fast frequency hopping based on DAGC diversity combining, and belongs to the technical field of interference resistance in spread spectrum digital communication. According to the method, through a coherent digital AGC diversity combining algorithm, for an anti-interference communication system with the deep spread spectrum and the coherent fast frequency hopping combined, the influence on other diversity by interference diversity signals in the coherent combining process is lowered, the signal-to-noise ratio of demodulation signals is improved, and the anti-interference capacity of the system is enhanced.

Description

technical field [0001] The invention relates to a method for realizing deep spectrum spreading and coherent fast frequency hopping based on DAGC diversity combination, and belongs to the technical field of anti-interference in spread spectrum digital communication. Background technique [0002] Spread spectrum communication (referred to as spread spectrum communication) technology has a series of advantages such as strong anti-interference ability, anti-multipath, anti-interception, multiple access multiplexing, good confidentiality, high ranging accuracy and easy networking. According to the different ways of spreading the spectrum, the spread spectrum communication technology mainly includes two ways: Direct Sequence Spread Spectrum (DSSS) and Frequency Hopping Spread Spectrum (FHSS). Direct-sequence spread spectrum technology has shortcomings such as "far-near effect", limited spread spectrum bandwidth, and large targeted interference. Frequency-hopping spread spectrum te...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H04B1/69H04B1/715H04K3/00
Inventor 刘策伦苏旭韩龙勃文霄杰
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap