CN102740504A - WiFi communication system and method - Google Patents
WiFi communication system and method Download PDFInfo
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- CN102740504A CN102740504A CN2011100819955A CN201110081995A CN102740504A CN 102740504 A CN102740504 A CN 102740504A CN 2011100819955 A CN2011100819955 A CN 2011100819955A CN 201110081995 A CN201110081995 A CN 201110081995A CN 102740504 A CN102740504 A CN 102740504A
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Abstract
The invention discloses a WiFi communication system which comprises a WiFi signal transmitter and a WiFi signal receiver, wherein the WiFi signal transmitter is connected with a WiFi chip, and is used for carrying out frequency-reducing and frequency-hopping processing on WiFi signals outputted by the WiFi chip and transmitting the signals; and the WiFi signal receiver is connected with the WiFi chip, and is used for receiving the frequency-reduced and frequency-hopped WiFi signals and restoring the frequency-reduced and frequency-hopped WiFi signals into initial signals. The invention further discloses a WiFi communication method. With the system and the method of the invention adopted, the transmission range of WiFi signals can be expanded, interference can be prevented, and the security of WiFi communication can be enhanced.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of WiFi communication system and method.
Background technology
Adopting wireless fidelity technology (Wireless Fidelity, WiFi) be a kind of with PC, handheld device terminals such as (like mobile phone, PDA) with the interconnected technology of wireless mode.At present, WiFi has mainly utilized ISM (Industrial, Scientific, Medical) two frequency ranges of 2.4GHz in the frequency range and 5GHz.
In the prior art, because the band frequency that the WiFi technology adopts is high, signal is decayed very fast in transmission course, causes the communication distance of WiFi signal in the prior art very short.The communication distance of WiFi signal is very short in the prior art, further causes needs to dispose a large amount of base stations, could realize the covering of WiFi signal in certain zone, the waste hardware resource.
Meanwhile, because the ISM band traffic congestion, noise is more, also causes WiFi signal of the prior art to be subject to disturb.
Summary of the invention
The purpose of this invention is to provide a kind of WiFi communication system and method, can increase the transmission range of WiFi signal, anti-interference, and improve the fail safe that WiFi communicates by letter.
For realizing above-mentioned purpose, the invention provides following scheme:
A kind of WiFi communication system comprises:
The WiFi signal transmitter that links to each other with the WiFi chip is used for the initial WiFi radiofrequency signal of WiFi chip output is carried out processing of frequency reducing frequency hopping and emission;
The WiFi signal receiver that links to each other with the WiFi chip is used to receive the WiFi signal after the said frequency reducing frequency hopping, the WiFi signal after the said frequency reducing frequency hopping is reduced into said initial WiFi radiofrequency signal redispatches and handle to the WiFi chip.
Preferably, said WiFi signal transmitter comprises:
Frequency reducing frequency hopping module is used for said initial WiFi radiofrequency signal is carried out frequency reducing and frequency hopping processing;
Signal emission module is used to launch the WiFi signal after the said frequency reducing frequency hopping;
Said WiFi signal receiver comprises:
Signal receiving module is used to receive the WiFi signal after the said frequency reducing frequency hopping;
The signal recovery module is used for the WiFi signal after the said frequency reducing frequency hopping is reduced into said initial WiFi radiofrequency signal.
Preferably, said frequency reducing frequency hopping module comprises:
Launch the frequency hopping code maker, be used to generate the emission frequency hopping code of control frequency synthesizer;
Frequency synthesizer is according to the variation generation frequency hopping frequency reducing carrier signal of said emission frequency hopping code;
Frequency mixer is used for said initial WiFi radiofrequency signal and the mixing of said frequency hopping frequency reducing carrier signal with the output of WiFi chip, obtains the WiFi signal of frequency reducing frequency hopping;
Said signal recovery module comprises:
Receive the frequency hopping code maker, generate the reception frequency hopping code identical with said emission frequency hopping code according to the phase information of the WiFi signal of the said frequency reducing frequency hopping that receives;
Frequency synthesizer is according to the variation generation frequency hopping frequency reducing carrier signal of said reception frequency hopping code;
Frequency mixer is used for the signal mixing with frequency reducing frequency hopping WiFi signal that receives and frequency synthesizer generation, is reduced to said initial WiFi radiofrequency signal.
Preferably, said signal emission module also comprises:
Power amplifier, the transmitting power that is used to amplify said WiFi signal transmitter.
Preferably, said signal receiving module also comprises:
Low noise amplifier is used to amplify the signal strength signal intensity that said WiFi signal receiver receives, to improve the receiving sensitivity of receiver.
A kind of WiFi communication means comprises:
Initial WiFi signal is carried out frequency reducing and frequency hopping processing;
Launch the WiFi signal after the said frequency reducing frequency hopping;
Receive the WiFi signal after the said frequency reducing frequency hopping;
WiFi signal after the said frequency reducing frequency hopping is reduced into said initial WiFi signal.
WiFi communication system disclosed by the invention and method are handled through the WiFi signal being carried out the frequency reducing frequency hopping, have reduced the tranmitting frequency of WiFi signal, can increase the transmission range of WiFi signal.Further, adopt WiFi communication system of the present invention that the coverage of transmitter is increased, reduce the deployment of base station, reduce cost.Meanwhile, because the signal frequency of WiFi communication system according to the invention is away from crowded 2.4GHz frequency range, so be not vulnerable to the interference of 2.4GHz frequency band signals.
In addition; Because WiFi communication system according to the invention; The frequency of the WiFi signal of emission changes in frequency hopping always, if want to attack or invade system according to the invention, then must know the saltus step rule of system WiFi signal according to the invention; So WiFi communication system according to the invention has also improved the fail safe of communicating by letter.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use among the embodiment below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the said WiFi communication system architecture of embodiment of the invention figure;
Fig. 2 is a WiFi signal transmitter structure chart according to the invention;
Fig. 3 is a WiFi signal receiver structure chart according to the invention;
Fig. 4 is another structure chart of WiFi signal transmitter according to the invention;
Fig. 5 is another structure chart of WiFi signal receiver according to the invention;
Fig. 6 is a WiFi communication means flow chart according to the invention.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Referring to Fig. 1, be the said WiFi communication system architecture of embodiment of the invention figure.As shown in Figure 1, this system comprises:
WiFi signal transmitter 101 and WiFi signal receiver 102.Said WiFi signal transmitter 101 links to each other with the WiFi chip, is used for the initial WiFi radiofrequency signal of WiFi chip output is carried out the frequency hopping down conversion process and it is launched; Said WiFi signal receiver 102 links to each other with another WiFi chip, is used to receive the WiFi signal after the frequency reducing frequency hopping of said transmitter output, and the WiFi signal after the said frequency reducing frequency hopping is reduced into said initial WiFi radiofrequency signal, sends into the WiFi chip and handles.
Wherein, the WiFi chip can be commercial WiFi chip, has separate signal transmitting-receiving and signal processing function.
Said initial WiFi radiofrequency signal is carried out the frequency reducing frequency hopping handle, frequency reducing is meant the frequency that reduces initial WiFi signal, makes it be lower than 2.4GHz.Frequency hopping is meant, makes the transmitting-receiving frequency constantly saltus step in time within the specific limits of WiFi signal.Therefore, said initial WiFi radiofrequency signal is carried out the frequency reducing frequency hopping handle, just be meant, make transmitting-receiving frequency constantly saltus step in time in being lower than the scope of 2.4GHz of WiFi signal.
Because WiFi communication module according to the invention has reduced the tranmitting frequency of WiFi signal, so can increase the transmission range of WiFi signal.Further, adopt WiFi communication system of the present invention that the coverage of transmitter is increased, reduce the deployment of base station, reduce cost.Meanwhile, because the signal frequency of WiFi communication system according to the invention is away from crowded 2.4GHz frequency range, so be not vulnerable to the interference of 2.4GHz frequency band signals.
In addition; Because WiFi communication system according to the invention; The frequency of the WiFi signal of emission changes, if want to attack or invade system according to the invention, then must know the saltus step rule of system WiFi signal according to the invention; So WiFi communication system according to the invention has also improved the fail safe of communicating by letter.
Concrete, referring to Fig. 2, be WiFi signal transmitter structure chart according to the invention.As shown in Figure 2, said WiFi signal transmitter 101 can comprise:
Frequency reducing frequency hopping module 201 is used for said initial WiFi radiofrequency signal is carried out frequency reducing and frequency hopping processing;
Accordingly, referring to Fig. 3, be WiFi signal receiver structure chart according to the invention.As shown in Figure 3, said WiFi signal receiver 102 can comprise:
Wherein, said frequency reducing frequency hopping module 201 can comprise:
Launch the frequency hopping code maker, be used to generate the emission frequency hopping code of control frequency synthesizer;
Frequency synthesizer is according to the variation generation frequency hopping frequency reducing carrier signal of emission frequency hopping code;
Frequency mixer is used for said initial WiFi radiofrequency signal and the mixing of said frequency hopping frequency reducing carrier signal with the output of WiFi chip, obtains the WiFi signal of frequency reducing frequency hopping;
Said signal recovery module 302 comprises:
Receive the frequency hopping code maker, generate the reception frequency hopping code identical with said emission frequency hopping code according to the phase information of the WiFi signal of the said frequency reducing frequency hopping that receives;
Frequency synthesizer is according to the variation generation frequency hopping frequency reducing carrier signal of said reception frequency hopping code;
Frequency mixer is used for the signal mixing with frequency reducing frequency hopping WiFi signal that receives and frequency synthesizer generation, is reduced to said initial WiFi radiofrequency signal.
Referring to Fig. 4, be another structure chart of WiFi signal transmitter according to the invention.As shown in Figure 4, said WiFi signal transmitter comprises:
Frequency reducing frequency hopping module 201 and signal emission module 202.
Wherein, frequency reducing frequency hopping module 201 comprises:
Launch frequency hopping code maker 2011, be used to generate the emission frequency hopping code of control frequency synthesizer;
Wherein, the emission frequency hopping code generates according to certain rule.The effect of frequency mixer 2013, be initial WiFi signal loading to said frequency hopping frequency reducing carrier wave, obtain the WiFi signal after the frequency hopping frequency reducing.
Referring to Fig. 5, be the more detailed structure chart of WiFi signal receiver according to the invention.As shown in Figure 5, said WiFi signal receiver comprises:
Signal receiving module 301, signal recovery module 302.
Wherein, signal recovery module 302 comprises:
Receive frequency hopping code maker 3023, generate the reception frequency hopping code identical with said emission frequency hopping code according to the phase information of the WiFi signal of the said frequency reducing frequency hopping that receives;
Wherein, receive in the frequency hopping code maker 3023, can comprise a synchronous circuit, be used to catch the accurate phase place of the Frequency Hopping Signal that receives, and then the generation reception frequency hopping code identical with said emission frequency hopping code.Frequency mixer 3021 carries out mixing (reduction) according to the WiFi signal of said frequency reducing frequency-hopping carrier after to said frequency reducing frequency hopping and obtains initial WiFi radiofrequency signal.
In the practical application, in order further to increase transmission range, WiFi signal transmitter according to the invention can also comprise:
Power amplifier, the transmitting power that is used to amplify said WiFi signal transmitter;
Said WiFi signal receiver can also comprise:
Low noise amplifier is used to amplify the signal strength signal intensity that said WiFi signal receiver receives, to improve the receiving sensitivity of receiver.
The invention also discloses a kind of WiFi communication means.Referring to Fig. 6, be WiFi communication means flow chart according to the invention.As shown in Figure 6, the method comprising the steps of:
S601: initial WiFi radiofrequency signal is carried out frequency reducing and frequency hopping processing;
S602: launch the WiFi signal after the said frequency reducing frequency hopping;
S603: receive the WiFi signal after the said frequency reducing frequency hopping;
S604: the WiFi signal after the said frequency reducing frequency hopping is reduced into said initial WiFi signal.
Among the step S601, said initial WiFi signal is carried out the frequency hopping down conversion process, can comprise step:
Generate the emission frequency hopping code;
Generate frequency hopping frequency reducing carrier signal according to said emission frequency hopping code;
Said frequency hopping frequency reducing carrier wave and said initial WiFi radiofrequency signal are carried out mixing, obtain WiFi signal after the frequency hopping frequency reducing;
WiFi signal to after the said frequency reducing frequency hopping carries out demodulation, obtains initial WiFi signal, can comprise step:
Generate the reception frequency hopping code identical with said emission frequency hopping code;
Generate the reception frequency reducing frequency-hopping carrier identical according to said reception frequency hopping code with said emission frequency reducing frequency-hopping carrier;
According to said reception frequency reducing frequency-hopping carrier to said frequency reducing frequency hopping after the WiFi signal carry out demodulation, obtain initial WiFi radiofrequency signal.
In the practical application, in order further to increase signal transmission distance, the method for the invention can also comprise:
Add power amplifier among the step S602 to improve signal transmission power;
Add low noise amplifier among the step S603 to improve receiving sensitivity.
Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed all is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.For the embodiment disclosed method, because it is corresponding with the disclosed system of embodiment, so description is fairly simple, relevant part gets final product referring to the components of system as directed explanation.
Used concrete example among this paper principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, part all can change on embodiment and range of application.In sum, this description should not be construed as limitation of the present invention.
Claims (7)
1. a WiFi communication system is characterized in that, comprising:
The WiFi signal transmitter that links to each other with the WiFi chip is used for the initial WiFi radiofrequency signal of WiFi chip output is carried out processing of frequency reducing frequency hopping and emission;
The WiFi signal receiver that links to each other with the WiFi chip is used to receive the WiFi signal after the said frequency reducing frequency hopping, the WiFi signal after the said frequency reducing frequency hopping is reduced into said initial WiFi radiofrequency signal redispatches and handle to the WiFi chip.
2. system according to claim 1 is characterized in that, said WiFi signal transmitter comprises:
Frequency reducing frequency hopping module is used for said initial WiFi radiofrequency signal is carried out frequency reducing and frequency hopping processing;
Signal emission module is used to launch the WiFi signal after the said frequency reducing frequency hopping;
Said WiFi signal receiver comprises:
Signal receiving module is used to receive the WiFi signal after the said frequency reducing frequency hopping;
The signal recovery module is used for the WiFi signal after the said frequency reducing frequency hopping is reduced into said initial WiFi radiofrequency signal.
3. system according to claim 2 is characterized in that, said frequency reducing frequency hopping module comprises:
Launch the frequency hopping code maker, be used to generate the emission frequency hopping code of control frequency synthesizer;
Frequency synthesizer is according to the variation generation frequency hopping frequency reducing carrier signal of said emission frequency hopping code;
Frequency mixer is used for said initial WiFi radiofrequency signal and the mixing of said frequency hopping frequency reducing carrier signal with the output of WiFi chip, obtains the WiFi signal of frequency reducing frequency hopping;
Said signal recovery module comprises:
Receive the frequency hopping code maker, generate the reception frequency hopping code identical with said emission frequency hopping code according to the phase information of the WiFi signal of the said frequency reducing frequency hopping that receives;
Frequency synthesizer is according to the variation generation frequency hopping frequency reducing carrier signal of said reception frequency hopping code;
Frequency mixer is used for the signal mixing with frequency reducing frequency hopping WiFi signal that receives and frequency synthesizer generation, is reduced to said initial WiFi radiofrequency signal.
4. according to each described system of claim 2-3, it is characterized in that said signal emission module also comprises:
Power amplifier, the transmitting power that is used to amplify said WiFi signal transmitter.
5. according to each described system of claim 2-3, it is characterized in that said signal receiving module also comprises:
Low noise amplifier is used to amplify the signal strength signal intensity that said WiFi signal receiver receives, to improve the receiving sensitivity of receiver.
6. according to each described system of claim 2-3, it is characterized in that said signal emission module also comprises:
Power amplifier, the transmitting power that is used to amplify said WiFi signal transmitter;
Said signal receiving module also comprises:
Low noise amplifier is used to amplify the signal strength signal intensity that said WiFi signal receiver receives, to improve the receiving sensitivity of receiver.
7. a WiFi communication means is characterized in that, comprising:
Initial WiFi signal is carried out frequency reducing and frequency hopping processing;
Launch the WiFi signal after the said frequency reducing frequency hopping;
Receive the WiFi signal after the said frequency reducing frequency hopping;
WiFi signal after the said frequency reducing frequency hopping is reduced into said initial WiFi signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011100819955A CN102740504A (en) | 2011-04-01 | 2011-04-01 | WiFi communication system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100819955A CN102740504A (en) | 2011-04-01 | 2011-04-01 | WiFi communication system and method |
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Cited By (4)
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| CN103354459A (en) * | 2013-07-03 | 2013-10-16 | 浪潮电子信息产业股份有限公司 | WiFi communication system and method thereof |
| CN104898582A (en) * | 2014-03-05 | 2015-09-09 | 澧达科技股份有限公司 | Remote control system where communication frequency is lower than WiFi signal frequency |
| CN106921543A (en) * | 2015-12-28 | 2017-07-04 | 美的集团股份有限公司 | Home gateway and intelligent domestic system, the trunking method of Wifi signals |
| WO2017148084A1 (en) * | 2016-03-04 | 2017-09-08 | 中兴通讯股份有限公司 | Control method and apparatus for data transmission rate |
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Cited By (6)
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|---|---|---|---|---|
| CN103354459A (en) * | 2013-07-03 | 2013-10-16 | 浪潮电子信息产业股份有限公司 | WiFi communication system and method thereof |
| CN104898582A (en) * | 2014-03-05 | 2015-09-09 | 澧达科技股份有限公司 | Remote control system where communication frequency is lower than WiFi signal frequency |
| CN104898582B (en) * | 2014-03-05 | 2019-02-15 | 澧达科技股份有限公司 | Link up the tele-control system that frequency is lower than WiFi signal frequency |
| CN106921543A (en) * | 2015-12-28 | 2017-07-04 | 美的集团股份有限公司 | Home gateway and intelligent domestic system, the trunking method of Wifi signals |
| WO2017148084A1 (en) * | 2016-03-04 | 2017-09-08 | 中兴通讯股份有限公司 | Control method and apparatus for data transmission rate |
| CN107154832A (en) * | 2016-03-04 | 2017-09-12 | 西安中兴新软件有限责任公司 | A kind of control method and device of message transmission rate |
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Application publication date: 20121017 |