CN204517827U - A kind of communication system based on two media - Google Patents
A kind of communication system based on two media Download PDFInfo
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- CN204517827U CN204517827U CN201520269143.2U CN201520269143U CN204517827U CN 204517827 U CN204517827 U CN 204517827U CN 201520269143 U CN201520269143 U CN 201520269143U CN 204517827 U CN204517827 U CN 204517827U
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Abstract
The utility model relates to a kind of communication system based on two media, and the mode utilizing amplitude modulation and frequency modulation technology to combine carries out the transmission of voice-and-data signal, reduces the occupancy of frequency spectrum.Reverser as the generation end of carrier wave, and for generation of modulating data.Analog switch is used for modulating data-signal.Modulator is used for carrying out modulation amplitude limit to the voice signal of input.The voice signal of input is multiplied with data-signal and exports a road mixed signal by multiplier.Intermediate-frequency filter exports intermediate-freuqncy signal after carrying out filtering process to output signal, and intermediate frequency amplifier amplifies rear transmission to signal.Envelope detector carries out demodulation to signal and exports voice signal.Low-frequency filter carries out filtering process to the signal that intermediate frequency amplifier exports, output low frequency signal.Low frequency amplifier carries out amplification rear drive sound horn to low frequency signal.FM receiver is used for carrying out demodulation and outputting data signals to data-signal.
Description
Technical field
The utility model relates to a kind of communication system, more specifically to a kind of communication system based on two media.
Background technology
The transmission of voice signal is the most common in the communications, and along with the develop rapidly of digital communication, analog wireless communication is in the past faced with new challenges, and how to improve the availability of frequency spectrum, is excessively current popular problem to realize analog signal to digital signal.Realizing transfer of data adopts data equipment no doubt fine, but current analog communication also occupies sizable ratio, changes data equipment in the lump and infeasible, and actual way allows data also be transmitted by analog signalling.And how when not taking too many frequency spectrum resource, utilizing standard amplitude-modulated signal broadcast communication system, transferring voice and data are difficult points simultaneously.
Summary of the invention
The technical problem that the utility model mainly solves is: provide a kind of communication system based on two media, and the mode utilizing amplitude modulation and frequency modulation technology to combine carries out the transmission of voice-and-data signal, reduces the occupancy of frequency spectrum.
For solving the problems of the technologies described above, this practicality relates to a kind of communication system, more specifically to a kind of communication system based on two media, comprise reverser, analog switch, modulator-demodulator, multiplier, band pass filter, intermediate-frequency filter, intermediate frequency amplifier, envelope detector, low-frequency filter, low frequency amplifier, loudspeaker and FM receiver, the mode utilizing amplitude modulation and frequency modulation technology to combine carries out the transmission of voice-and-data signal, reduces the occupancy of frequency spectrum.
Reverser as the generation end of carrier wave, and for generation of modulating data.Analog switch is used for modulating data-signal.Modulator is used for carrying out modulation amplitude limit to the voice signal of input.The voice signal of input is multiplied with data-signal and exports a road mixed signal by multiplier.Band pass filter carries out filtering process to input signal, and clutter reduction disturbs.Intermediate-frequency filter exports intermediate-freuqncy signal after carrying out filtering process to output signal, and intermediate frequency amplifier amplifies rear transmission to signal.Envelope detector carries out demodulation to signal and exports voice signal.Low-frequency filter carries out filtering process to the signal that intermediate frequency amplifier exports, output low frequency signal.Low frequency amplifier carries out amplification rear drive sound horn to low frequency signal.FM receiver is used for carrying out demodulation and outputting data signals to data-signal.
As the further optimization of this programme, the reverser that the reverser described in a kind of communication system based on two media of the utility model selects Texas Instruments, Inc to produce, its model is 74HC04.
As the further optimization of this programme, the analog switch that the analog switch described in a kind of communication system based on two media of the utility model selects Texas Instruments, Inc to produce, its model is CD4053BE.
As the further optimization of this programme, the modulator that the modulator described in a kind of communication system based on two media of the utility model selects ONNN Co., Ltd to produce, its model is MC1496PG.
As the further optimization of this programme, the FM receiver that the FM receiver described in a kind of communication system based on two media of the utility model selects ONNN Co., Ltd to produce, its model is MC3362.
The beneficial effect of a kind of communication system based on two media of the utility model is:
A. transmission of speech signals and data-signal while;
B. the spectral occupancy in communication process is reduced.
Accompanying drawing explanation
Fig. 1 is the system block diagram of a kind of communication system based on two media of the utility model.
Embodiment
In FIG, this practicality relates to a kind of communication system, more specifically to a kind of communication system based on two media, comprise reverser, analog switch, modulator-demodulator, multiplier, band pass filter, intermediate-frequency filter, intermediate frequency amplifier, envelope detector, low-frequency filter, low frequency amplifier, loudspeaker and FM receiver, the mode utilizing amplitude modulation and frequency modulation technology to combine carries out the transmission of voice-and-data signal, reduces the occupancy of frequency spectrum.
Reverser as the generation end of carrier wave, and for generation of modulating data.The reverser that reverser selects Texas Instruments, Inc to produce, its model is 74HC04.Adopt three, the left side inverter of 74HC04 to generate Binary Frequency Shift Keying modulation carrier signal, carrier signal has two.Three, the right inverter of 74HC04 generates data-signal, and this data-signal is as Binary Frequency Shift Keying modulation modulation signal.
Analog switch is used for modulating data-signal.The analog switch that analog switch selects Texas Instruments, Inc to produce, its model is CD4053BE.CD4053BE is alternative analog switch, and during switching, impedance is low and leakage current is little, prevents from undergoing mutation to electric current during signal transacting, ensure that the stability of signal transacting.CD4053BE carries out Binary Frequency Shift Keying modulation to two carrier signals and a data-signal, exports the data after modulation.
Modulator is used for carrying out modulation amplitude limit to the voice signal of input.The modulator that modulator selects ONNN Co., Ltd to produce, its model is MC1496PG.The voice signal of MC1496PG to input carries out frequency modulation amplitude limit, namely completes the frequency modulation of voice signal.
Data after modulation and the voice restricting the number after frequency modulation transfer to multiplier.The voice signal of input is multiplied with data-signal and exports a road mixed signal by multiplier.Band pass filter carries out filtering process to input signal, and clutter reduction disturbs.
Intermediate-frequency filter exports intermediate-freuqncy signal after carrying out filtering process to output signal, and intermediate frequency amplifier amplifies rear transmission to signal.Envelope detector carries out demodulation to signal and exports voice signal.Low-frequency filter carries out filtering process to the signal that intermediate frequency amplifier exports, output low frequency signal.Low frequency amplifier carries out amplification rear drive sound horn to low frequency signal.Band pass filter transfer due to long-distance transmissions to the signal of intermediate-frequency filter, can be subject to the interference of various clutter, utilize intermediate-frequency filter elimination clutter, and select required intermediate wave.Can decay before the intermediate wave intensity that signal produces after intermediate-frequency filter filtering compares filtering, intermediate wave amplifies through intermediate frequency amplifier, to improve the power of Signal reception.Intermediate wave transfers to envelope detector, is recovered voice signal by after envelope detector demodulation, and voice signal is through low frequency filtering and amplify rear drive sound horn, and the voice signal received play by loudspeaker.
FM receiver is used for carrying out demodulation and outputting data signals to data-signal.The FM receiver that FM receiver selects ONNN Co., Ltd to produce, its model is MC3362.MC3362 demodulates data-signal after carrying out limited range enlargement and differential rectification to intermediate wave.Data-signal after demodulation is sampled through inner sampling decision device, data-signal is returned to original signal, thus completes the reception of data-signal.
Certain above-mentioned explanation is not limitation of the utility model; the utility model is also not limited only to above-mentioned citing; the change that those skilled in the art make in essential scope of the present utility model, remodeling, interpolation or replacement, also belong to protection range of the present utility model.
Claims (5)
1. the communication system based on two media, comprise reverser, analog switch, modulator, multiplier, band pass filter, intermediate-frequency filter, intermediate frequency amplifier, envelope detector, low-frequency filter, low frequency amplifier, loudspeaker and FM receiver, it is characterized in that: reverser as the generation end of carrier wave, and for generation of modulating data; Analog switch is used for modulating data-signal; Modulator is used for carrying out modulation amplitude limit to the voice signal of input; The voice signal of input is multiplied with data-signal and exports a road mixed signal by multiplier; Band pass filter carries out filtering process to input signal, and clutter reduction disturbs; Intermediate-frequency filter exports intermediate-freuqncy signal after carrying out filtering process to output signal, and intermediate frequency amplifier amplifies rear transmission to signal; Envelope detector carries out demodulation to signal and exports voice signal; Low-frequency filter carries out filtering process to the signal that intermediate frequency amplifier exports, output low frequency signal; Low frequency amplifier carries out amplification rear drive sound horn to low frequency signal; FM receiver is used for carrying out demodulation and outputting data signals to data-signal.
2. a kind of communication system based on two media according to claim 1, is characterized in that: the reverser that described reverser selects Texas Instruments, Inc to produce, and its model is 74HC04.
3. a kind of communication system based on two media according to claim 1, is characterized in that: the analog switch that described analog switch selects Texas Instruments, Inc to produce, and its model is CD4053BE.
4. a kind of communication system based on two media according to claim 1, it is characterized in that: the modulator that described modulator selects ONNN Co., Ltd to produce, its model is MC1496PG.
5. a kind of communication system based on two media according to claim 1, it is characterized in that: the FM receiver that described FM receiver selects ONNN Co., Ltd to produce, its model is MC3362.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520269143.2U CN204517827U (en) | 2015-04-29 | 2015-04-29 | A kind of communication system based on two media |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520269143.2U CN204517827U (en) | 2015-04-29 | 2015-04-29 | A kind of communication system based on two media |
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| CN204517827U true CN204517827U (en) | 2015-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520269143.2U Expired - Fee Related CN204517827U (en) | 2015-04-29 | 2015-04-29 | A kind of communication system based on two media |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105186666A (en) * | 2015-08-31 | 2015-12-23 | 成都科创城科技有限公司 | Infrared voice control module for smart home |
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2015
- 2015-04-29 CN CN201520269143.2U patent/CN204517827U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105186666A (en) * | 2015-08-31 | 2015-12-23 | 成都科创城科技有限公司 | Infrared voice control module for smart home |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150729 Termination date: 20160429 |