CN106911360A - A kind of small-sized frequency-hopping communication system - Google Patents
A kind of small-sized frequency-hopping communication system Download PDFInfo
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- CN106911360A CN106911360A CN201710145673.XA CN201710145673A CN106911360A CN 106911360 A CN106911360 A CN 106911360A CN 201710145673 A CN201710145673 A CN 201710145673A CN 106911360 A CN106911360 A CN 106911360A
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- module
- frequency
- digital filtering
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- communication system
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
- H04B1/7156—Arrangements for sequence synchronisation
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
The present invention discloses a kind of small-sized frequency-hopping communication system,Including connection baseband signal generation module,The Shaping Module and bit synchronization Clock Extraction module being connected by data wire with baseband signal generation module,The baseband signal generation module includes the controller module being sequentially connected,Pseudo-random sequence generation module and filter module,The bit synchronization Clock Extraction module includes digital filtering module,Edge detection module,Take divide ratio module,Frequency division module,The Shaping Module is connected with digital filtering module,Output signal is input into edge detection module digital filtering module all the way,Another road output signal of the digital filtering module is input into taking divide ratio module,The output end of edge detection module is connected with frequency division module terminal,The output end of divide ratio module is taken to be connected with another terminal of frequency division module,The outer input signal that the output end output of the frequency division module recovers,Simple structure of the present invention,It is easy to use,Small volume,Low cost.
Description
Technical field
The present invention relates to Communication Anti-Jamming Techniques field, and in particular to a kind of small-sized frequency-hopping communication system.
Background technology
Frequency hopping is a kind of technology for going up comparative maturity both at home and abroad at present.It can effectively avoid interference, and play
Communication efficiency.
Traditional small-sized frequency-hopping communication system composition device is numerous, and part of devices complex structure, volume are big, high cost, property
Can have to be hoisted.For this it is proposed that a kind of structure is simpler, cost is lower, more excellent performance small-sized frequency-hopping communication system comes
Solve the problem present on.
The content of the invention
(1) technical problem to be solved
A kind of small-sized frequency-hopping communication system is now proposed, portion numerous with the composition device for solving to be proposed in above-mentioned background technology
Point device architecture is complicated, volume is big, high cost, and performance has problem to be hoisted.
(2) technical scheme
The present invention is achieved through the following technical solutions：The present invention proposes a kind of small-sized frequency-hopping communication system, including connection
Shaping Module and position that the baseband signal generation module and baseband signal generation module of outer input signal are connected by data wire
Synchronised clock extraction module, the baseband signal generation module includes that the controller module being sequentially connected, pseudo-random sequence are produced
Module and filter module, the bit synchronization Clock Extraction module include digital filtering module, edge detection module, take frequency dividing
Coefficient module, frequency division module, the Shaping Module are connected with digital filtering module, and the digital filtering module is exported all the way
To edge detection module, another road output signal of the digital filtering module is input into taking divide ratio module signal input,
The output end of the edge detection module is connected with a terminal of frequency division module, the output end for taking divide ratio module with
Another terminal of frequency division module is connected, the outer input signal of the output end output recovery of the frequency division module.
Further, the controller module is made up of chip 74LS153 and 74LS161.
Further, the pseudo-random sequence generation module is made up of chip 74LS194.
Further, the wave filter is low pass filter.
Further, Shaping Module includes amplifying circuit and comparison circuit, and amplifying circuit is made up of chip TL084, compares
Electric router chip LM393 is constituted.
(3) beneficial effect
The present invention has the advantages that relative to prior art：
A kind of small-sized frequency-hopping communication system that the present invention is mentioned, during transmission signal, external input signal is input into controller
Module, launches baseband signal by controller module control pseudo-random sequence generation module, and after filtering after device module.
When receiving signal, the baseband signal of reception is carried out into shaping, digital filtering, by edge detection module locking phase, will taken point
The divide ratio input next stage frequency dividing circuit that frequency coefficient module is obtained, with reference to the edge signal locking output signal for extracting
Phase, reduces the phase jitter of output signal, and the phase of synchronous bit clock signal recovers input signal of going out.Compared to existing
Small-sized frequency-hopping communication system, structure of the present invention simpler, more excellent performance.
Controller module, pseudo-random sequence generation module, filter module, Shaping Module, digital filtering module, edge are carried
Modulus block, divide ratio module, frequency division module are taken, each module is integrated approach circuit, and modules are integrated in a dress
In putting, simple structure, easy to use, small volume, low cost.
Brief description of the drawings
Fig. 1 is structural principle connection block diagram of the present invention.
1- controller modules；2- pseudo-random sequence generation modules；3- filter modules；4- Shaping Modules；5- digital filterings
Module；6- edge detection modules；7- takes divide ratio module；8- frequency division modules.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
A kind of small-sized frequency-hopping communication system as shown in Figure 1, including controller module 1, pseudo-random sequence generation module 2,
Filter module 3, Shaping Module 4, digital filtering module 5, edge detection module 6, take divide ratio module 7, frequency division module 8；
Controller module 1 is connected with outer input signal, and the controller module 1 is connected with pseudo-random sequence generation module 2, it is described it is pseudo- with
Machine sequence generation module 2 is connected with filter module 3, and the filter module 3 is connected through transmission line with Shaping Module 4, described
Shaping Module 4 is connected with digital filtering module 5, and the tunnel output signal of the digital filtering module 5 one is input into edge detection module
6, another road output signal of the digital filtering module 5 is input into taking divide ratio module 7, the edge detection module it is defeated
Go out end 6 to be connected with a terminal of frequency division module 8, the output end for taking divide ratio module 7 and frequency division module 8 another
Terminal is connected, the outer input signal of the output end output recovery of the frequency division module 8.Each module is integrated approach circuit,
Each module is integrated in one apparatus, simple structure, small volume, low cost of the invention.
Controller module is made up of chip 74LS153 and 74LS161., used as counter, 74LS153 is used as double for 74LS161
Four select four kinds of frequency signals of a data selector, outer input to produce Frequency Hopping Signal with reference to 74LS161 by 74LS153.
Pseudo-random sequence generation module is made up of chip 74LS194, and the Frequency Hopping Signal for acting as receiving is converted into puppet
Random sequence signal.
Shaping Module is made up of two parts of amplifying circuit and comparison circuit.Amplifying circuit is made up of chip TL084, will be connect
The amplitude of the baseband signal for receiving is exaggerated in order to comparator circuit and baseband signal is realized more accurately to compare conversion；Compare
Circuit is made up of high speed comparable chip LM393, can realize for the baseband signal after amplification being converted into pseudo-random sequence signal,
Realize the reduction to transmitting terminal pseudo-random sequence signal.
The baseband signal that Shaping Module will be received is input into digital filtering module and is filtered.Digital filtering module be by
The narrow pulse interference of input by displacement and with or computing, eliminate the burst pulse of high frequency, filter the clutter produced in transmitting procedure,
It is easy to edge detection module to extract the synchronised clock of input signal.
When the effect of edge detection module is the synchronization that input signal is efficiently extracted out from the signal after digital filtering
Clock.
It is the frequency that signal is extracted from the signal after digital filtering to take divider ratio module.
Frequency division module extracts bit clock signal by taking the divider ratio that divider ratio module is obtained, and combines the edge for extracting
The phase of semaphore lock output signal, reduces the phase jitter of output signal, the phase of synchronous bit clock signal.
The course of work of the invention is：
Outer input signal is by the way that after controller module, the Frequency Hopping Signal that controller module will be produced is produced by pseudo-random sequence
Raw module, the pseudo-random sequence signal that pseudo-random sequence generation module is produced is converted into baseband signal by wave filter.
Baseband signal through transmission line to Shaping Module, the amplitude of the baseband signal that amplifying circuit will be received in Shaping Module
It is exaggerated in order to comparator circuit baseband signal is realized more accurately to compare conversion, comparison circuit is by the base band after amplification
Signal is converted into pseudo-random sequence signal, that is, realize the reduction to transmitting terminal pseudo-random sequence signal.The letter of Shaping Module output
The burst pulse of high frequency number is eliminated by digital filtering module, the clutter produced in transmitting procedure is filtered, is easy to edge detection module
Extract the synchronised clock of input signal.Output signal is input into edge detection module digital filtering module all the way, is carried by edge
Modulus block efficiently extracts out the synchronised clock of input signal；Another road output signal of digital filtering module is input into taking frequency dividing
Coefficient module, the divide ratio that will be obtained by taking divider ratio module is input into next stage frequency dividing circuit, and combines the side for extracting
Along the phase of semaphore lock output signal, the phase of synchronous bit clock signal.Frequency division module by take that divider ratio module obtains point
Frequency extracts bit clock signal, and combines the phase that the edge signal for extracting locks output signal, synchronous bit clock signal
Phase.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to structure of the invention
Think and scope is defined.On the premise of design concept of the present invention is not departed from, this area ordinary person is to technology of the invention
The all variations and modifications that scheme is made, all should drop into protection scope of the present invention, claimed technology contents of the invention,
All record in detail in the claims.
Claims (5)
1. a kind of small-sized frequency-hopping communication system, it is characterised in that：Including connect outer input signal baseband signal generation module and
Shaping Module and bit synchronization Clock Extraction module that baseband signal generation module is connected by data wire, the baseband signal are produced
Raw module includes the controller module, pseudo-random sequence generation module and the filter module that are sequentially connected, during the bit synchronization
Clock extraction module includes digital filtering module, edge detection module, takes divide ratio module, frequency division module, the shaping
Module is connected with digital filtering module, and output signal is input into edge detection module, the number digital filtering module all the way
Another road output signal of word filtration module is input into taking divide ratio module, output end and the frequency dividing of the edge detection module
One terminal of module is connected, and the output end for taking divide ratio module is connected with another terminal of frequency division module, described
The outer input signal that the output end output of frequency division module recovers.
2. a kind of small-sized frequency-hopping communication system according to claim 1, it is characterised in that：The controller module is by chip
74LS153 and 74LS161 is constituted.
3. a kind of small-sized frequency-hopping communication system according to claim 1, it is characterised in that：The pseudo-random sequence produces mould
Block is made up of chip 74LS194.
4. a kind of small-sized frequency-hopping communication system according to claim 1, it is characterised in that：The wave filter is LPF
Device.
5. a kind of small-sized frequency-hopping communication system according to claim 1, it is characterised in that：The Shaping Module includes amplifying
Circuit and comparison circuit, amplifying circuit are made up of chip TL084, and comparison circuit is made up of chip LM393.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710145673.XA CN106911360A (en) | 2017-03-14 | 2017-03-14 | A kind of small-sized frequency-hopping communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710145673.XA CN106911360A (en) | 2017-03-14 | 2017-03-14 | A kind of small-sized frequency-hopping communication system |
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| CN106911360A true CN106911360A (en) | 2017-06-30 |
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| CN201710145673.XA Pending CN106911360A (en) | 2017-03-14 | 2017-03-14 | A kind of small-sized frequency-hopping communication system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110224722A (en) * | 2019-07-11 | 2019-09-10 | 南京永为科技有限公司 | A kind of plc communication blocking equipment and method |
-
2017
- 2017-03-14 CN CN201710145673.XA patent/CN106911360A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110224722A (en) * | 2019-07-11 | 2019-09-10 | 南京永为科技有限公司 | A kind of plc communication blocking equipment and method |
| CN110224722B (en) * | 2019-07-11 | 2024-04-12 | 南京永为科技有限公司 | PLC communication blocking device and method |
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Application publication date: 20170630 |