CN108173567B - Frequency modulation system and frequency modulation method of multi-band interphone - Google Patents
Frequency modulation system and frequency modulation method of multi-band interphone Download PDFInfo
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- CN108173567B CN108173567B CN201810125168.3A CN201810125168A CN108173567B CN 108173567 B CN108173567 B CN 108173567B CN 201810125168 A CN201810125168 A CN 201810125168A CN 108173567 B CN108173567 B CN 108173567B
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- 238000006243 chemical reaction Methods 0.000 claims description 6
- 230000008054 signal transmission Effects 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 4
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- 238000010586 diagram Methods 0.000 description 8
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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
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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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
- H04B1/005—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0064—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with separate antennas for the more than one band
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Abstract
The invention provides a frequency modulation system of a multi-band interphone and a frequency modulation method thereof, wherein a first-level modulation and demodulation unit in the frequency modulation system separates out a second frequency band signal and sends the second frequency band signal to a second-level modulation and demodulation unit, and sends a demodulated first frequency band signal to a control unit; the second-level modulation and demodulation unit sends the demodulated second frequency band signal to the control unit for delay processing; the control unit sends the transmitted second frequency band signal to the time control signal receiving and transmitting unit, and the signal receiving and transmitting unit sends a control command to the time control signal receiving and transmitting unit so that the second frequency band signal is transmitted by the secondary receiving and transmitting antenna. The frequency modulation system of the invention is provided with two stages of modulation and demodulation units so as to separate signals of two frequency bands from received radio frequency signals, respectively demodulate the signals so as to shorten the response time of the signals, and respectively transmit the signals in an alternating mode by adopting a mechanism of independent transmission when transmitting the signals so as to reduce the interference among the signals.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a frequency modulation system and a frequency modulation method of a multi-band interphone.
Background
The interphone is a bidirectional mobile communication tool, can communicate without any network support, is suitable for occasions with relatively fixed and frequent communication, has no telephone charge, and is suitable for occasions with relatively fixed and frequent communication. There are three general categories of interphones: analog interphone, digital interphone, IP interphone. The common interphone is used for talkback at the same frequency, and a signal carrying talkback content is received in a frequency band, so that the use of the interphone is very limited, and frequency band resources are wasted.
Disclosure of Invention
In order to solve the above-mentioned shortcomings of the prior art, the present invention is directed to a frequency modulation system and a frequency modulation method for a multi-band interphone, so as to overcome the shortcomings of the prior art.
In order to achieve the above purpose, the present invention provides a frequency modulation system of a multi-band interphone, which includes a radio frequency receiving and transmitting antenna, a signal receiving and transmitting unit, a primary modulation and demodulation unit, a secondary modulation and demodulation unit, a time control signal receiving and transmitting unit, a secondary receiving and transmitting antenna, a control unit and an intercom unit; the radio frequency receiving and transmitting antenna is connected with the signal receiving and transmitting unit, the signal receiving and transmitting unit is connected with the primary modulation and demodulation unit, the primary modulation and demodulation unit is respectively connected with the secondary modulation and demodulation unit and the control unit, the secondary modulation and demodulation unit is respectively connected with the time control signal receiving and transmitting unit and the control unit, and the control unit is respectively connected with the intercom unit and the time control signal receiving and transmitting unit; the first-stage modulation and demodulation unit is used for modulating and demodulating the first frequency band signal, separating out the second frequency band signal, sending the second frequency band signal to the second-stage modulation and demodulation unit, and sending the demodulated first frequency band signal to the control unit; the second-level modulation and demodulation unit is used for modulating and demodulating the second frequency band signal and sending the demodulated second frequency band signal to the control unit for delay processing; the time control signal receiving and transmitting unit is used for transmitting the second frequency band signal, the control unit transmits the transmitted second frequency band signal to the time control signal receiving and transmitting unit, and the signal receiving and transmitting unit transmits a control command to the time control signal receiving and transmitting unit so that the second frequency band signal is transmitted by the secondary receiving and transmitting antenna.
As a further explanation of the frequency modulation system according to the present invention, it is preferable that the primary modem unit includes a low-pass filter, a high-pass filter, a first digital oscillator, and a first delay circuit; the signal receiving and transmitting unit is respectively connected with the high-pass filter and the low-pass filter, the low-pass filter is connected with the two-stage modulation and demodulation unit, the high-pass filter is connected with the first digital oscillator, and the first digital oscillator is connected with the control unit through the first delay circuit.
As a further illustration of the frequency modulation system according to the invention, the secondary modem unit preferably comprises a second digital oscillator and a second delay circuit; the first-stage modulation-demodulation unit is connected with the second digital oscillator, and the second digital oscillator is connected with the control unit through the second delay circuit.
As a further explanation of the frequency modulation system according to the present invention, preferably, the time control signal transceiver unit includes a clock circuit and a third delay circuit; the control unit and the third delay circuit are respectively connected with a clock circuit, and the clock circuit is connected with the signal receiving and transmitting unit.
In order to achieve another object of the present invention, the present invention further provides a frequency modulation method using the frequency modulation system of the multi-band interphone, the frequency modulation method comprising the steps of:
step 1): the radio frequency signals received by the signal receiving and transmitting unit are sent to the primary modulation and demodulation unit so as to separate a first frequency band signal and a second frequency band signal, and the second frequency band signal is sent to the secondary modulation and demodulation unit;
step 2): the primary modulation and demodulation unit performs frequency conversion on the first frequency band signal, demodulates the first frequency band signal to obtain a first frequency band audio signal, and sends the first frequency band audio signal to the control unit; the second-level modulation and demodulation unit performs frequency conversion processing on the second frequency band signal, the second frequency band audio signal is obtained after demodulation and is sent to the control unit, and the intercom unit sends a control command to the control unit so as to realize ordered output of the first frequency band audio signal and the second frequency band audio signal;
step 3): the intercom unit outputs a first frequency band audio signal and a second frequency band audio signal, the control unit sends the first frequency band audio signal to the primary modulation and demodulation unit for modulation to obtain a first frequency band signal, and the control unit sends the second frequency band audio signal to the secondary modulation and demodulation unit for modulation to obtain a second frequency band signal;
step 4): the control unit sends a second frequency band signal to the time control signal receiving and transmitting unit for delay waiting; meanwhile, the first frequency band signal is processed into radio frequency signal emission by the signal receiving and transmitting unit, and a control command is sent to the time control signal receiving and transmitting unit, and the time control signal receiving and transmitting unit emits the second frequency band signal.
The frequency modulation system of the invention is provided with two stages of modulation and demodulation units so as to separate signals of two frequency bands from received radio frequency signals, respectively demodulate the signals so as to shorten the response time of the signals, and respectively transmit the signals in an alternating mode by adopting a mechanism of independent transmission when transmitting the signals so as to reduce the interference among the signals.
Drawings
Fig. 1 is a schematic diagram of a fm system of a multiband interphone according to the present invention;
FIG. 2 is a schematic diagram of a primary modem unit according to the present invention;
FIG. 3 is a schematic diagram of a second-level modem unit according to the present invention;
fig. 4 is a schematic structural diagram of the time control signal transceiver unit of the present invention.
Detailed Description
For a further understanding of the structure, features, and other objects of the invention, reference should now be made in detail to the accompanying drawings of the preferred embodiments of the invention, which are illustrated in the accompanying drawings and are for purposes of illustrating the concepts of the invention and not for limiting the invention.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a fm system of the multi-band intercom of the present invention; the frequency modulation system comprises a radio frequency receiving and transmitting antenna 1, a signal receiving and transmitting unit 2, a primary modulation and demodulation unit 3, a secondary modulation and demodulation unit 4, a time control signal receiving and transmitting unit 5, a secondary receiving and transmitting antenna 6, a control unit 7 and an intercom unit 8; the radio frequency receiving and transmitting antenna 1 is connected with the signal receiving and transmitting unit 2, the signal receiving and transmitting unit 2 is connected with the primary modulation and demodulation unit 3, the primary modulation and demodulation unit 3 is respectively connected with the secondary modulation and demodulation unit 4 and the control unit 7, the secondary modulation and demodulation unit 4 is respectively connected with the time control signal receiving and transmitting unit 5 and the control unit 7, and the control unit 7 is respectively connected with the intercom unit 8 and the time control signal receiving and transmitting unit 5; the primary modulation and demodulation unit 3 is used for modulating and demodulating the first frequency band signal, separating out the second frequency band signal, sending the second frequency band signal to the secondary modulation and demodulation unit 4, and sending the demodulated first frequency band signal to the control unit 7; the second-level modem unit 4 is used for modulating and demodulating the second frequency band signal and sending the demodulated second frequency band signal to the control unit 7 for delay processing; the time control signal receiving and transmitting unit 5 is configured to transmit a second frequency band signal, the control unit 7 sends the transmitted second frequency band signal to the time control signal receiving and transmitting unit 5, and the signal receiving and transmitting unit 2 sends a control command to the time control signal receiving and transmitting unit 5, so that the second frequency band signal is transmitted by the secondary receiving and transmitting antenna 6.
The frequency modulation system is provided with two stages of modulation and demodulation units so as to separate signals of two frequency bands from received radio frequency signals, respectively demodulate the signals to shorten the response time of the signals, delay-process the signals of the second frequency band by the control unit, transmit the signals of the second frequency band at intervals by adopting a separate transmission mechanism according to the frequency period of the signals of the first frequency band, and reduce the interference among the signals.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a primary modem unit according to the present invention; the primary modem unit 3 includes a low-pass filter 31, a high-pass filter 32, a first digital oscillator 33, and a first delay circuit 34; the signal transceiver unit 2 is connected to a high pass filter 32 and a low pass filter 31, the low pass filter 31 is connected to the two-stage modem unit 4, the high pass filter 32 is connected to a first digital oscillator 33, and the first digital oscillator 33 is connected to the control unit 7 through a first delay circuit 34. The radio frequency signal received by the signal receiving and transmitting unit 2 adopts a double-line parallel transmission mode, a first frequency band signal is separated by a high-pass filter 32 and demodulated into a first frequency band audio signal through a first digital oscillator 33, and the first frequency band audio signal is sent to the control unit 8 through a first delay circuit 34; the low-pass filter 31 separates out the second frequency band signal and sends the second frequency band signal to the secondary modulation demodulation unit 4 for demodulation; the first delay circuit 34 is configured to play the first frequency band audio signal when the intercom terminal controls to press the answer first frequency band button.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a two-level modem unit according to the present invention; the secondary modem unit 4 includes a second digital oscillator 41 and a second delay circuit 42; the primary modem unit 3 is connected to the second digital oscillator 41, and the second digital oscillator 41 is connected to the control unit 7 through the second delay circuit 42. The second frequency band signal is demodulated by the second digital oscillator 41 into a second frequency band audio signal, the second frequency band audio signal is sent to the control unit 8 through the second delay circuit 42, and the second delay circuit 42 is set to play the second frequency band audio signal when the intercom terminal controls to press the answer second frequency band button.
Referring to fig. 4, fig. 4 is a schematic structural diagram of the time control signal transceiver unit of the present invention. The time control signal receiving and transmitting unit 5 comprises a clock circuit 51 and a third delay circuit 52; the control unit 7 and the third delay circuit 52 are respectively connected to a clock circuit 51, and the clock circuit 51 is connected to the signal transceiver unit 2. The audio signal of the first frequency band input by the intercom unit 8 is sent to the primary modulation and demodulation unit 3 for modulation through the control unit 7, then is processed into a radio frequency signal by the signal receiving and transmitting unit 2, and is transmitted by the radio frequency receiving and transmitting antenna 1; the second frequency band audio signal input by the intercom unit 8 is sent to the second-level modulation and demodulation unit 4 for modulation through the control unit 7, then the control unit 7 sends the modulated second frequency band audio signal to the time control signal receiving and sending unit 5, when the time control signal receiving and sending unit 5 processes the second frequency band audio signal into a radio frequency signal, the radio frequency signal is sent to the second frequency band audio signal receiving and sending unit 2 through the third delay circuit 52, the second frequency band audio signal receiving and sending unit 2 sends a signal to enter a sleep state after waiting for a control command of the signal receiving and sending unit 2, the sending state, the sleep state and the receiving state of the signal receiving and sending unit 2 are alternately conducted, the interval time is controlled by the control unit 7, the signal receiving and sending unit 2 sends a trigger signal to the clock circuit 51 of the time control signal receiving and sending unit 5 once entering the sleep state, the clock circuit 51 triggers the third delay circuit 52, the sending state and the sleep state of the clock circuit 51 are also controlled by the control unit 7, so that the radio frequency receiving and sending antenna 1 and the second frequency band audio signal receiving and sending unit 6 alternately send signals, and interference between the signals of the two frequency bands is avoided.
The invention also provides a frequency modulation method of the frequency modulation system using the multi-band interphone, which comprises the following steps:
step 1): the radio frequency signal received by the signal receiving and transmitting unit 2 is sent to the primary modem unit 3 to separate the first frequency band signal and the second frequency band signal, and the second frequency band signal is sent to the secondary modem unit 4.
Step 2): the primary modulation and demodulation unit 3 carries out frequency conversion processing on the first frequency band signal, and the first frequency band audio signal obtained after demodulation is sent to the control unit 7; the second-stage modulation and demodulation unit 4 performs frequency conversion processing on the second frequency band signal, the second frequency band audio signal obtained after demodulation is sent to the control unit 7, and the intercom unit 8 sends a control command to the control unit 7 so as to realize ordered output of the first frequency band audio signal and the second frequency band audio signal.
Step 3): the intercom unit 8 outputs a first frequency band audio signal and a second frequency band audio signal, the control unit 7 sends the first frequency band audio signal to the primary modulation and demodulation unit 3 for modulation to obtain a first frequency band signal, and the control unit 7 sends the second frequency band audio signal to the secondary modulation and demodulation unit 4 for modulation to obtain a second frequency band signal.
Step 4): the control unit 7 sends a second frequency band signal to the time control signal receiving and transmitting unit 5 for delay waiting; meanwhile, the signal of the first frequency band is processed by the signal receiving and transmitting unit 2 to be radio frequency signal emission, and a control command is sent to the time control signal receiving and transmitting unit 5, and the time control signal receiving and transmitting unit 5 emits the signal of the second frequency band.
It should be noted that the foregoing summary and the detailed description are intended to demonstrate practical applications of the technical solution provided by the present invention, and should not be construed as limiting the scope of the present invention. Various modifications, equivalent alterations, or improvements will occur to those skilled in the art, and are within the spirit and principles of the invention. The scope of the invention is defined by the appended claims.
Claims (3)
1. The frequency modulation system of the multi-band interphone is characterized by comprising a radio frequency receiving and transmitting antenna (1), a signal receiving and transmitting unit (2), a primary modulation and demodulation unit (3), a secondary modulation and demodulation unit (4), a time control signal receiving and transmitting unit (5), a secondary receiving and transmitting antenna (6), a control unit (7) and an interphone unit (8); wherein,,
the radio frequency receiving and transmitting antenna (1) is connected with the signal receiving and transmitting unit (2), the signal receiving and transmitting unit (2) is connected with the primary modulation and demodulation unit (3), the primary modulation and demodulation unit (3) is respectively connected with the secondary modulation and demodulation unit (4) and the control unit (7), the secondary modulation and demodulation unit (4) is respectively connected with the time control signal receiving and transmitting unit (5) and the control unit (7), and the control unit (7) is respectively connected with the intercom unit (8) and the time control signal receiving and transmitting unit (5);
the first-level modulation and demodulation unit (3) is used for modulating and demodulating the first frequency band signal, separating out the second frequency band signal, sending the second frequency band signal to the second-level modulation and demodulation unit (4), and sending the demodulated first frequency band signal to the control unit (7);
the second-level modulation and demodulation unit (4) is used for modulating and demodulating the second frequency band signal and sending the demodulated second frequency band signal to the control unit (7) for delay processing;
the time control signal receiving and transmitting unit (5) is used for transmitting the second frequency band signal, the control unit (7) transmits the transmitted second frequency band signal to the time control signal receiving and transmitting unit (5), and the signal receiving and transmitting unit (2) transmits a control command to the time control signal receiving and transmitting unit (5) so that the second frequency band signal is transmitted by the secondary receiving and transmitting antenna (6);
the primary modem unit (3) comprises a low-pass filter (31), a high-pass filter (32), a first digital oscillator (33) and a first delay circuit (34); the signal receiving and transmitting unit (2) is respectively connected with a high-pass filter (32) and a low-pass filter (31), the low-pass filter (31) is connected with the two-stage modulation and demodulation unit (4), the high-pass filter (32) is connected with the first digital oscillator (33), and the first digital oscillator (33) is connected with the control unit (7) through the first delay circuit (34);
the second-stage modem unit (4) comprises a second digital oscillator (41) and a second delay circuit (42); the first-stage modem unit (3) is connected with a second digital oscillator (41), and the second digital oscillator (41) is connected with the control unit (7) through a second delay circuit (42).
2. A frequency modulation system as claimed in claim 1, characterized in that the timed signal transceiving unit (5) comprises a clock circuit (51) and a third delay circuit (52); the control unit (7) and the third delay circuit (52) are respectively connected with the clock circuit (51), and the clock circuit (51) is connected with the signal receiving and transmitting unit (2).
3. A method of tuning a frequency tuning system using a multi-band intercom set according to any of claims 1-2, said method comprising the steps of:
step 1): the radio frequency signals received by the signal receiving and transmitting unit (2) are sent to the primary modulation and demodulation unit (3) so as to separate a first frequency band signal and a second frequency band signal, and the second frequency band signal is sent to the secondary modulation and demodulation unit (4);
step 2): the primary modulation and demodulation unit (3) performs frequency conversion processing on the first frequency band signal, demodulates the first frequency band signal to obtain a first frequency band audio signal, and sends the first frequency band audio signal to the control unit (7); the second-level modulation and demodulation unit (4) carries out frequency conversion processing on the second frequency band signals, the second frequency band audio signals are obtained after demodulation and sent to the control unit (7), and the intercom unit (8) sends control commands to the control unit (7) so as to realize ordered output of the first frequency band audio signals and the second frequency band audio signals;
step 3): the intercom unit (8) outputs a first frequency band audio signal and a second frequency band audio signal, the control unit (7) sends the first frequency band audio signal to the primary modulation and demodulation unit (3) for modulation to obtain a first frequency band signal, and the control unit (7) sends the second frequency band audio signal to the secondary modulation and demodulation unit (4) for modulation to obtain a second frequency band signal;
step 4): the control unit (7) sends a second frequency band signal to the time control signal receiving and transmitting unit (5) for delay waiting; meanwhile, the first frequency band signal is processed into radio frequency signal transmission by the signal receiving and transmitting unit (2), and a control command is sent to the time control signal receiving and transmitting unit (5), and the time control signal receiving and transmitting unit (5) transmits the second frequency band signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810125168.3A CN108173567B (en) | 2018-02-08 | 2018-02-08 | Frequency modulation system and frequency modulation method of multi-band interphone |
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| CN201810125168.3A CN108173567B (en) | 2018-02-08 | 2018-02-08 | Frequency modulation system and frequency modulation method of multi-band interphone |
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| CN108173567A CN108173567A (en) | 2018-06-15 |
| CN108173567B true CN108173567B (en) | 2023-07-07 |
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| CN115296691B (en) * | 2022-08-01 | 2024-01-02 | 深圳金信诺高新技术股份有限公司 | Signal receiving and transmitting device and wireless network equipment |
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| CN101741803A (en) * | 2009-12-24 | 2010-06-16 | 中国科学技术大学 | Multi-band frequency spectrum aggregating wireless transmitter-receiver device |
| CN201967104U (en) * | 2010-12-10 | 2011-09-07 | 深圳市其力昌科技发展有限公司 | Shift frequency anti-interference hidden earphone system |
| CN102664776A (en) * | 2012-04-20 | 2012-09-12 | 北京弥佳电子科技有限公司 | Substation, signal transmission system and method, and network topology thereof |
| CN102801438A (en) * | 2012-07-11 | 2012-11-28 | 深圳九洲海全通科技股份有限公司 | Handheld type wireless maritime affair interphone |
| CN207884622U (en) * | 2018-02-08 | 2018-09-18 | 福建省万华电子科技有限公司 | A kind of frequency modulation system of multiband interphone |
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2018
- 2018-02-08 CN CN201810125168.3A patent/CN108173567B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101741803A (en) * | 2009-12-24 | 2010-06-16 | 中国科学技术大学 | Multi-band frequency spectrum aggregating wireless transmitter-receiver device |
| CN201967104U (en) * | 2010-12-10 | 2011-09-07 | 深圳市其力昌科技发展有限公司 | Shift frequency anti-interference hidden earphone system |
| CN102664776A (en) * | 2012-04-20 | 2012-09-12 | 北京弥佳电子科技有限公司 | Substation, signal transmission system and method, and network topology thereof |
| CN102801438A (en) * | 2012-07-11 | 2012-11-28 | 深圳九洲海全通科技股份有限公司 | Handheld type wireless maritime affair interphone |
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