CN105450285A - Relay communication device for ultrashort-wave vehicle-mounted platform - Google Patents
Relay communication device for ultrashort-wave vehicle-mounted platform Download PDFInfo
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- CN105450285A CN105450285A CN201511031609.6A CN201511031609A CN105450285A CN 105450285 A CN105450285 A CN 105450285A CN 201511031609 A CN201511031609 A CN 201511031609A CN 105450285 A CN105450285 A CN 105450285A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15507—Relay station based processing for cell extension or control of coverage area
Abstract
The invention discloses a relay communication device for an ultrashort-wave vehicle-mounted platform, and the device comprises an ultrashort-wave antenna, a duplexer, a first digital ultrashort-wave radio station, a second analog ultrashort-wave radio station, a third digital ultrashort-wave radio station, a fourth analog ultrashort-wave radio station, and an access selection unit. The ultrashort-wave antenna receives a radio frequency signal, and transmits the radio frequency signal to the duplexer. The radio frequency signal enters into the first digital ultrashort-wave radio station or the second analog ultrashort-wave radio station through the duplexer. The first digital ultrashort-wave radio station and the second analog ultrashort-wave radio station can respectively convert the radio frequency signal into a voice signal, and the voice signals are selected through the access selection unit to enter into the third digital ultrashort-wave radio station or the fourth analog ultrashort-wave radio station. The third digital ultrashort-wave radio station and the fourth analog ultrashort-wave radio station can convert the voice signals into radio frequency signals which are transmitted to the ultrashort-wave antenna through the duplexer.
Description
Technical field
The invention belongs to ultrashort wave trunking traffic technical field, particularly a kind of indirect communication device of ultrashort wave Vehicle mounted station, be applicable to relaying or analog-to-digital ultrashort wave trunking traffic.
Background technology
Radio station has digital ultrashort wave radio station and simulation ultrashort wave radio set, according to the condition of communication equipment site of deployment and the requirement difference of user, often exist and carry out Signal transmissions in a different manner, and digital ultrashort wave radio station cannot compatible existing a large amount of simulation ultrashort wave radio set.At present, do not changing under existing communication equipment prerequisite, be difficult to digital ultrashort wave radio station and simulation ultrashort wave radio set to be reliably connected, be also difficult to realize the interstation function that interconnects of non-same standard wireless network, and then cause the flexibility of wireless network and survivability to reduce.
Summary of the invention
For above problem, the object of the invention is to the indirect communication device proposing a kind of ultrashort wave Vehicle mounted station, this kind can realize the connection call of two kinds of different communication modes based on the indirect communication device that ultrashort wave Vehicle mounted station is built, not only compensate for the deficiency of digital ultrashort wave radio station and simulation ultrashort wave radio set communication mode separately, and improve the utilance of existing digital ultrashort wave radio station and simulation ultrashort wave radio set, expand the scope of application that can communicate, make the ultrashort wave device interoperability of different types, also extend the communication distance of ultrashort wave radio set simultaneously.
For reaching above-mentioned technical purpose, the present invention adopts following technical scheme to be achieved.
An indirect communication device for ultrashort wave Vehicle mounted station, comprising: ultrashort wave antenna, duplexer, the first digital ultrashort wave radio station, the second simulation ultrashort wave radio set, the 3rd digital ultrashort wave radio station, the 4th simulation ultrashort wave radio set, path selection unit;
Described duplexer has five ports, is respectively the first bidirectional port, the second emission port, the 3rd emission port, the 4th receiving port and the 5th receiving port, first digital ultrashort wave radio station comprises three ports, is the first rf signal reception end, the second audio signal output end, the 3rd audio signal output end respectively, second simulation ultrashort wave radio set comprises three ports, is the 4th rf signal reception end, the 5th audio signal output end and the 6th audio signal output end respectively, 3rd digital ultrashort wave radio station comprises three ports, is subtonic signal input part, the 8th audio signal input end, the 9th emission of radio frequency signals end frequently respectively, 4th simulation ultrashort wave radio set comprises three ports, is the tenth audio signal input end, the 11 audio signal input end and the 12 emission of radio frequency signals end respectively, described first bidirectional port is bi-directionally connected described ultrashort wave antenna, the described first rf signal reception end of described second emission port electrical connection, described second audio signal output end is electrically connected described subtonic signal input part frequently, described tenth audio signal input end of described 3rd audio signal output end electrical connection, the described 4th rf signal reception end of described 3rd emission port electrical connection, described 8th audio signal input end of described 5th audio signal output end electrical connection, described 11 audio signal input end of described 6th audio signal output end electrical connection, described 4th receiving port of described 9th emission of radio frequency signals end electrical connection, described 5th receiving port of described 12 emission of radio frequency signals end electrical connection.
Described path selection unit is used for optionally connecting the first path, alternate path, third path or the 4th path, described first path is described second audio signal output end and the path of described subtonic frequently between signal input part, described alternate path is the path between described 3rd audio signal output end and described tenth audio signal input end, described third path is the path between described 5th audio signal output end and described 8th audio signal input end, described 4th path is the path between described 6th audio signal output end and described 11 audio signal input end.
Ultrashort wave antenna received RF signal, and radiofrequency signal is sent to duplexer, radiofrequency signal enters the first digital ultrashort wave radio station or the second simulation ultrashort wave radio set by duplexer, first digital ultrashort wave radio station and the second simulation ultrashort wave radio set can convert radiofrequency signal to voice signal respectively, described voice signal enters the 3rd digital ultrashort wave radio station or the 4th simulation ultrashort wave radio set after being selected by path selection unit, 3rd digital ultrashort wave radio station and the 4th simulation ultrashort wave radio set can convert voice signal to radiofrequency signal, described radiofrequency signal is sent to ultrashort wave antenna through duplexer again.
Feature of the present invention and further improvement are:
Described ultrashort wave antenna is sucker antenna or omnidirectional antenna.
Beneficial effect of the present invention is: the object of the invention is to propose a kind of support relaying of building based on ultrashort wave Vehicle mounted station and support analog-to-digital ultrashort wave indirect communication device, the present invention can make up the deficiency of digital ultrashort wave radio station and simulation ultrashort wave radio set two kinds of communication modes self, as digital ultrashort wave radio set cannot compatible existing a large amount of simulation ultrashort wave radio set, the utilance of raising equipment, the scope of application that expansion can communicate, the ultrashort wave device interoperability of different types can be made, also extend the communication distance of ultrashort wave radio set simultaneously, strengthen flexibility and the survivability of wireless network, there is linking up station difference rotating function simultaneously, turned by the difference of trunk desk and the speech range between two or multi-section ultrashort wave hand-held set can be made to extend to tens kilometers even tens kilometers from several kilometers.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, invention is described in further detail.
Fig. 1 is the indirect communication device general structure schematic diagram of a kind of ultrashort wave Vehicle mounted station of the present invention;
Fig. 2 is the structural representation of simulation ultrashort wave radio set of the present invention;
Fig. 3 is the structural representation in digital ultrashort wave radio station of the present invention.
Embodiment
With reference to Fig. 1, for the general structure schematic diagram of the indirect communication device of a kind of ultrashort wave Vehicle mounted station of the present invention, the indirect communication device of described a kind of ultrashort wave Vehicle mounted station, comprises ultrashort wave antenna, duplexer, the first digital ultrashort wave radio station, the second simulation ultrashort wave radio set, the 3rd digital ultrashort wave radio station and the 4th simulation ultrashort wave radio set; Ultrashort wave antenna is used for receiving or launching ultrashort wave signals; In the present embodiment, ultrashort wave antenna is ultrashort wave sucker antenna or omni-directional high-gain ultrashort wave antenna.Duplexer has five ports, is the first transmit-receive sharing end, secondary signal transmitting terminal, the 3rd signal transmitting terminal, the 4th signal receiving end and the 5th signal receiving end respectively, first digital ultrashort wave radio station comprises three ports, is the first rf signal reception end, the second audio signal output end, the 3rd audio signal output end respectively, second simulation ultrashort wave radio set comprises three ports, is the 4th rf signal reception end, the 5th audio signal output end and the 6th audio signal output end respectively, 3rd digital ultrashort wave radio station comprises three ports, is subtonic signal input part, the 8th audio signal input end, the 9th emission of radio frequency signals end frequently respectively, 4th simulation ultrashort wave radio set comprises three ports, is the tenth audio signal input end, the 11 audio signal input end and the 12 emission of radio frequency signals end respectively, described first port is bi-directionally connected described ultrashort wave antenna, the described first rf signal reception end of described second emission port electrical connection, described second audio signal output end is electrically connected described subtonic signal input part frequently, described tenth audio signal input end of described 3rd audio signal output end electrical connection, the described 4th rf signal reception end of described 3rd emission port electrical connection, described 8th audio signal input end of described 5th audio signal output end electrical connection, described 11 audio signal input end of described 6th audio signal output end electrical connection, described 4th receiving port of described 9th emission of radio frequency signals end electrical connection, described 5th receiving port of described 12 emission of radio frequency signals end electrical connection,
Ultrashort wave antenna, by the first transmit-receive sharing end of antenna socket electrical connection duplexer, for receiving the radiofrequency signal that duplexer sends over, or is sent to duplexer for the radiofrequency signal received by ultrashort wave antenna.The secondary signal transmitting terminal of duplexer is electrically connected the first digital ultrashort wave radio station first rf signal reception end, 4th rf signal reception end of the 3rd signal transmitting terminal electrical connection second simulation ultrashort wave radio set of duplexer, the 9th emission of radio frequency signals end in the 4th signal receiving end electrical connection the 3rd digital ultrashort wave radio station of duplexer, the 12 emission of radio frequency signals end of the 5th signal receiving end electrical connection the 4th simulation ultrashort wave radio set of duplexer.
Ultrashort wave antenna received RF signal, and radiofrequency signal is sent to duplexer, radiofrequency signal enters the first digital ultrashort wave radio station or the second simulation ultrashort wave radio set by duplexer, first digital ultrashort wave radio station and the second simulation ultrashort wave radio set can convert radiofrequency signal to voice signal respectively, described voice signal enters the 3rd digital ultrashort wave radio station or the 4th simulation ultrashort wave radio set after being selected by path selection unit, 3rd digital ultrashort wave radio station and the 4th simulation ultrashort wave radio set can convert voice signal to radiofrequency signal, described radiofrequency signal is sent to ultrashort wave antenna through duplexer again.
With reference to Fig. 2, it is the structural representation of simulation ultrashort wave radio set of the present invention; Second simulation ultrashort wave radio set and the 4th simulation ultrashort wave radio set comprise transceiver channel unit respectively, described transceiver channel unit comprises local oscillation signal, multiplier, power amplification circuit and FM treatment circuit, described FM treatment circuit comprises two bidirectional interfaces, be respectively the first bidirectional interface and the second bidirectional interface, described first bidirectional interface is bi-directionally connected audio interface, for receiving simulated audio signal and carrying out FM modulation or send simulated audio signal; Described multiplier comprises four ports, respectively: local oscillator input, the 3rd bidirectional interface, short-wave antenna input, mixed frequency signal output; 3rd bidirectional interface of the two-way electrical connection multiplier of described second bidirectional interface, the local oscillator input of multiplier is for accessing local oscillation signal, the input of the mixed frequency signal output electrical connection power amplification circuit of multiplier, the input of the output electrical connection ultrashort wave antenna of power amplification circuit, the short-wave antenna input of the output electrical connection multiplier of ultrashort wave antenna.
Described ultrashort wave antenna receives aerial radiofrequency signal, and described aerial radiofrequency signal is sent to multiplier; Simultaneously, local oscillation signal also enters multiplier, modulate after first local oscillation signal and aerial radiofrequency signal enter multiplier, obtain the first modulation signal, FM treatment circuit is used for carrying out FM demodulation to the first modulation signal, obtain the simulated audio signal after FM demodulation, then the simulated audio signal after described FM demodulation is play by audio interface.
Described audio interface obtains voice signal, voice signal enters FM treatment circuit by audio interface, obtain the signal through FM treatment circuit, meanwhile, the second local oscillation signal enters multiplier, and the second local oscillation signal and the described signal through FM treatment circuit carry out mixed modulated in multiplier, obtain the second mixed modulated signal, power amplifier carries out power amplification to described second mixed modulated signal, obtains power signal, and is blazed abroad by described power signal by ultrashort wave antenna.
In the embodiment of the present invention, second simulation ultrashort wave radio set and the 4th simulation ultrashort wave radio set also comprise display unit and single-chip microcomputer respectively, display unit comprises button and display screen, button is used for single-chip microcomputer input instruction, and described instruction is shown on display screen, single-chip microcomputer determines to launch working channel according to described instruction, and sends each self-corresponding control signal according to described instruction respectively to local oscillation signal, FM treatment circuit and power amplifier; When the second simulation ultrashort wave radio set or the 4th simulation ultrashort wave radio set send signal or Received signal strength respectively, display screen receives the second simulation ultrashort wave radio set or each self-corresponding signal of the 4th simulation ultrashort wave radio set by single-chip microcomputer process, and show the second simulation ultrashort wave radio set or the 4th respective operating state of simulation ultrashort wave radio set and indication information accordingly, to show that channel is at reception or emission state.
With reference to Fig. 3, it is the structural representation in digital ultrashort wave radio station of the present invention; In the embodiment of the present invention, the first digital ultrashort wave radio station and the 3rd digital ultrashort wave radio station are also respectively arranged with ultrashort wave antenna, band pass filter, radiofrequency signal analog to digital converter, FPGA, dsp chip, audio digital to analog converter, audio A/D converter, radiofrequency signal digital to analog converter, radiofrequency signal analog to digital converter, power amplifier, low pass filter, audio interface; FPGA comprises two bidirectional ports, two inputs and two outputs, is respectively: a FPGA bidirectional port, the 2nd FPGA bidirectional port, a FPGA input, the 2nd FPGA input, a FPGA output, the 2nd FPGA output; Dsp chip comprises a DSP bidirectional port, and ultrashort wave antenna comprises a ultrashort wave signals receiving terminal and a ultrashort wave signals output; The DSP bidirectional port of the one FPGA bidirectional port electrical connection dsp chip of FPGA, the input of the ultrashort wave signals output electrical connection band pass filter of the ultrashort wave output ultrashort wave antenna of described ultrashort wave antenna, the input of the output electrical connection radiofrequency signal analog to digital converter of band pass filter, a FPGA input of the output electrical connection FPGA of radiofrequency signal analog to digital converter; The output of the 2nd FPGA input electrical connection audio A/D converter of FPGA, the input of the one FPGA output electrical connection audio digital to analog converter of FPGA, the input of the 2nd FPGA output electrical connection radiofrequency signal digital to analog converter of FPGA, the input of the output electrical connection power amplifier of radiofrequency signal digital to analog converter, the input of the output electrical connection low pass filter of power amplifier, the ultrashort wave signals receiving terminal of the output electrical connection ultrashort wave antenna of low pass filter; The output of the input electrical connection audio interface of audio A/D converter, the output of the input electrical connection audio digital to analog converter of audio interface.
Ultrashort wave antenna is used for received RF signal, and the radiofrequency signal received is sent to band pass filter, band pass filter carries out bandpass filtering treatment to the described radiofrequency signal received, obtain bandpass signal, again this bandpass signal is sent to radiofrequency signal analog to digital converter, described bandpass signal is converted to digital radio signal by radiofrequency signal analog to digital converter, and this digital radio signal is sent to FPGA, FPGA is used for carrying out down-converted to described digital radio signal, again the digital baseband signal produced after down-converted is sent to dsp chip, dsp chip is used for carrying out base band demodulating to described digital baseband signal, again the digital audio and video signals generated after base band demodulating is sent to FPGA, described digital audio and video signals is sent to audio digital to analog converter by FPGA again, audio digital to analog converter carries out digital-to-analogue conversion to described digital audio and video signals, obtain simulated audio signal, and this simulated audio signal is sent to audio interface, described simulated audio signal play by audio interface external loudspeaker.
Or, described simulated audio signal is sent to audio A/D converter and carries out analog-to-digital conversion by audio interface, obtain digital audio and video signals, again described digital audio and video signals is sent to FPGA, FPGA is also for being sent to dsp chip by described digital audio and video signals, dsp chip is used for carrying out baseband modulation to described digital audio and video signals, and the digital baseband signal produced after baseband modulation is sent to FPGA, FPGA is used for carrying out upconversion process to described digital baseband signal, and the digital radio signal generated after upconversion process is sent to radiofrequency signal digital to analog converter, radiofrequency signal digital to analog converter carries out digital-to-analogue conversion to described digital radio signal, obtain analog radio-frequency signal, and this analog radio-frequency signal is sent to power amplifier, after power amplifier carries out power amplification to described analog radio-frequency signal, be sent to low pass filter again and carry out filtering process, finally obtain low-passed analog radiofrequency signal, and then described low-passed analog radiofrequency signal is sent to ultrashort wave antenna.
In the embodiment of the present invention, the first digital ultrashort wave radio station and the 3rd digital ultrashort wave radio station also comprise arm processor and man-machine interaction unit respectively, and arm processor comprises an ARM bidirectional port, an ARM input and an ARM output; Man-machine interaction unit comprises button and display screen, the output of the ARM input electrical connection button of arm processor, the input of arm processor ARM output electrical connection display screen, the 2nd FPGA bidirectional port of the ARM bidirectional port electrical connection FPGA of arm processor.
Button is used for arm processor input instruction, arm processor determines the transmitting mode of operation in the first digital ultrashort wave radio station or the 3rd digital ultrashort wave radio station according to the instruction of button, described transmitting mode of operation comprises frequency fixing communication, automatically controls communication, adaptive communications three kinds of mode of operations, and select that unencryped word, acoustic code are talked about accordingly, data flow or datagram mode send control signal corresponding to the first digital ultrashort wave radio station or the 3rd digital ultrashort wave radio station to FPGA, and then complete communication process as required under the associated treatment of FPGA, dsp chip.When the first digital ultrashort wave radio station or the 3rd digital ultrashort wave radio station send signal or Received signal strength, display screen receives signal corresponding to the first digital ultrashort wave radio station or the 3rd digital ultrashort wave radio station by arm processor, make its operating state that can show the first digital ultrashort wave radio station or the 3rd digital ultrashort wave radio station and indication information, to show that channel is at reception or emission state.
In the embodiment of the present invention, also be provided with path selection unit, path selection unit is used for optionally connecting the first path, alternate path, third path or the 4th path, described first path is described second audio signal output end and the path of described subtonic frequently between signal input part, described alternate path is the path between described 3rd audio signal output end and described tenth audio signal input end, described third path is the path between described 5th audio signal output end and described 8th audio signal input end, described 4th path is the path between described 6th audio signal output end and described 11 audio signal input end, the path selection function of path selection unit selects rotary switch to realize by path.
In the embodiment of the present invention, also be provided with DC power supply and supply socket, DC power supply comprises four outputs, be electrically connected the power end that power end, second simulates the power end of ultrashort wave radio set, the power end in the 3rd digital ultrashort wave radio station and the 4th simulates ultrashort wave radio set in the first digital ultrashort wave radio station by supply socket respectively, be respectively used to as the first digital ultrashort wave radio station, the second simulation ultrashort wave radio set, the 3rd digital ultrashort wave radio station and the 4th simulation ultrashort wave radio set provide power supply.
A kind of embodiment of ultrashort wave relay processes is as follows: for realizing the relay function of digital ultrashort wave hand-held set and digital ultrashort wave hand-held set, selecting rotary switch, making path selection unit connect the first path by changing path.Due to digital ultrashort wave hand-held set receive frequency and tranmitting frequency different, this time Received signal strength frequency of setting first digital ultrashort wave hand-held set and the 3rd digital ultrashort wave hand-held set is respectively A, and emission signal frequency is respectively B; Be respectively B with the Received signal strength frequency in the first digital ultrashort wave hand-held set and corresponding respectively the first digital ultrashort wave radio station of the 3rd digital ultrashort wave hand-held set and the 3rd digital ultrashort wave radio station, emission signal frequency is respectively A.First digital ultrashort wave hand-held set received audio signal, convert audio signal to radiofrequency signal again, and radiofrequency signal is outwards launched, ultrashort wave antenna received RF signal of the present invention, and make described radiofrequency signal enter the first digital ultrashort wave radio station by duplexer, again according to the first path that path selection unit is connected, the 3rd digital ultrashort wave radio station is made to receive the radiofrequency signal from the first digital ultrashort wave hand-held set and carry out impedance matching, and then obtain the radiofrequency signal of impedance matching, then the radiofrequency signal of this impedance matching is entered band pass filter and carry out filtering process, the analog radio-frequency signal obtained after filtering process, again this analog radio-frequency signal is sent to radiofrequency signal analog to digital converter, digital radio signal is become after analog-to-digital conversion, and this digital radio signal is sent to FPGA.
FPGA is after receiving the digital radio signal from radiofrequency signal analog to digital converter, down-converted is carried out to described digital radio signal, obtain digital baseband signal, described digital baseband signal is sent to dsp chip by FPGA, dsp chip carries out base band demodulating to digital baseband signal, then the digital audio and video signals that demodulation generates is sent to FPGA, described digital audio and video signals is sent to audio digital to analog converter by FPGA, audio digital to analog converter carries out digital-to-analogue conversion to described digital audio and video signals, audio interface is sent to after obtaining simulated audio signal, audio interface receives simulated audio signal, and external loudspeaker just can hear corresponding sound at audio interface place.
Audio interface also connects the audio A/D converter that the 3rd digital ultrashort radio station comprises, this audio A/D converter is made to carry out analog-to-digital conversion to the simulated audio signal that described audio interface receives, the digital audio and video signals obtained after analog-to-digital conversion is sent to FPGA, digital audio and video signals is sent to dsp chip by FPGA, dsp chip carries out baseband modulation to this digital audio and video signals, and the digital baseband signal produced after baseband modulation is sent to FPGA, FPGA carries out upconversion process to described digital baseband signal, produce digital radio signal, described digital radio signal is sent to radiofrequency signal digital to analog converter by FPGA, radiofrequency signal digital to analog converter carries out digital-to-analogue conversion to described digital radio signal, and the analog radio-frequency signal after digital-to-analogue conversion is sent to power amplifier, power amplifier is sent to low pass filter after carrying out power amplification to described analog radio-frequency signal, in the low pass filter, filtering process is carried out to the analog radio-frequency signal after power amplification, the harmonic component of the analog radio-frequency signal after power amplification described in filtering and idle component, obtain useful analog radio-frequency signal, then useful analog radio-frequency signal is sent to ultrashort wave antenna and completes impedance matching, obtain the radiofrequency signal of impedance matching, the radiofrequency signal of impedance matching is sent by ultrashort wave antenna simultaneously, the three digital ultrashort wave hand-held set corresponding with the 3rd digital ultrashort wave radio station receives the radiofrequency signal of impedance matching, and convert the radiofrequency signal of this impedance matching to audio signal, and send voice, so just complete interconnecting between the first digital ultrashort wave hand-held set and the 3rd digital ultrashort wave hand-held set by apparatus of the present invention.
In the embodiment of the present invention, for realizing the relay function of digital ultrashort wave hand-held set and simulation ultrashort wave hand-held set, selecting rotary switch by changing path, making path selection unit connect alternate path.First digital ultrashort wave hand-held set received audio signal, and convert this audio signal to radiofrequency signal, then emission of radio frequency signals gone out, ultrashort wave antenna received RF signal, the radiofrequency signal that ultrashort wave antenna receives enters the first digital ultrashort wave radio station by duplexer.According to the alternate path that path selection unit is connected, the first digital ultrashort wave radio station corresponding with the first digital ultrashort wave hand-held set receives the radiofrequency signal from the first digital ultrashort wave hand-held set, and this radiofrequency signal is sent to band pass filter carries out filtering process, again the analog radio-frequency signal obtained after filtering process is sent to radiofrequency signal analog to digital converter, digital radio signal is become after analog-to-digital conversion, described digital radio signal is sent to FPGA, after FPGA receives described digital radio signal, down-converted is carried out to described digital radio signal, obtain digital baseband signal, digital baseband signal is sent to dsp chip by FPGA again, dsp chip carries out base band demodulating to described digital baseband signal, then the digital audio and video signals that demodulation generates is sent to FPGA, described digital audio and video signals is sent to audio digital to analog converter by FPGA, audio digital to analog converter carries out digital-to-analogue conversion to described digital audio and video signals, the simulated audio signal that conversion produces is sent to audio interface, audio interface receives the simulated audio signal that described conversion produces, and external loudspeaker just can hear corresponding sound at audio interface place.
The alternate path selecting control unit to select due to path connects the 4th simulation ultrashort wave radio set, 4th simulation ultrashort wave radio set receives the simulated audio signal that described conversion produces, and FM modulation is carried out to the simulated audio signal that described conversion produces, the signal generated after FM modulation is carried out mixing, generate and simulate radiofrequency signal corresponding to ultrashort wave radio set with the 4th, simulate after radiofrequency signal corresponding to ultrashort wave radio set carry out power amplification by described with the 4th, obtain the radiofrequency signal after power amplification, then the radiofrequency signal after this power amplification is sent into duplexer, by duplexer, the radiofrequency signal after this power amplification is sent to ultrashort wave antenna, by ultrashort wave antenna, the emission of radio frequency signals after power amplification is gone out, the radiofrequency signal after described power amplification is received again by the second simulation ultrashort wave hand-held set, this completes the signal transmission from the first digital ultrashort wave hand-held set to the second simulation ultrashort wave hand-held set.
In the embodiment of the present invention, for realizing the relay function of simulation ultrashort wave hand-held set and digital ultrashort wave hand-held set, selecting rotary switch by changing path, making path selection unit connect third path.First simulation ultrashort wave hand-held set received audio signal, and convert this audio signal to radiofrequency signal, again this emission of radio frequency signals is gone out, ultrashort wave antenna received RF signal, the radiofrequency signal that ultrashort wave antenna receives enters the second simulation ultrashort wave radio set by duplexer, after second simulation ultrashort wave radio set carries out mixing to the radiofrequency signal received, obtain simulating intermediate-freuqncy signal corresponding to ultrashort wave radio set with second, then simulate intermediate-freuqncy signal corresponding to ultrashort wave radio set by described and be sent to FM treatment circuit with second and carry out FM demodulation, by producing simulated audio signal after FM demodulation, simulated audio signal is sent to the 3rd digital ultrashort wave radio station by the third path that path selection unit is connected by the second simulation ultrashort wave radio set, by the audio A/D converter in the 3rd digital ultrashort wave radio station, analog-to-digital conversion is carried out to described simulated audio signal, the digital audio and video signals obtained after analog-to-digital conversion is sent to FPGA, described digital audio and video signals is sent to dsp chip by FPGA, dsp chip carries out baseband modulation to described digital audio and video signals, and the digital baseband signal produced after baseband modulation is sent to FPGA, FPGA carries out upconversion process to described digital baseband signal, produce digital radio signal, this digital radio signal is sent to radiofrequency signal digital to analog converter by FPGA, radiofrequency signal digital to analog converter carries out digital-to-analogue conversion to described digital radio signal, the analog radio-frequency signal obtained after digital-to-analogue conversion is sent to power amplifier, after power amplifier amplifies described analog radio-frequency signal, be sent to low pass filter again and carry out filtering process.In the low pass filter, filtering process is carried out to the analog radio-frequency signal after power amplification, the harmonic component of the analog radio-frequency signal described in filtering after power amplification and idle component, obtain useful analog radio-frequency signal, then useful analog radio-frequency signal is sent to ultrashort wave antenna and completes impedance matching, obtain the useful radiofrequency signal of impedance matching, and by ultrashort wave antenna, useful analog radio-frequency signal is sent, second digital ultrashort wave hand-held set converts this useful analog radio-frequency signal to audio signal, and send voice, so just complete interconnecting of the first simulation ultrashort wave hand-held set and the second digital ultrashort wave hand-held set by apparatus of the present invention.
In the embodiment of the present invention, for realizing the relay function of simulation ultrashort wave hand-held set and simulation ultrashort wave hand-held set, selecting rotary switch by changing path, making path selection unit connect the 4th path.First simulation ultrashort wave hand-held set received audio signal, and convert this audio signal to radiofrequency signal, then this emission of radio frequency signals is gone out, ultrashort wave antenna received RF signal, the radiofrequency signal that ultrashort wave antenna receives enters the second simulation ultrashort wave radio set by duplexer, second simulation ultrashort wave radio set carries out mixing to the radiofrequency signal received, obtain simulating intermediate-freuqncy signal corresponding to ultrashort wave radio set with second, and simulate intermediate-freuqncy signal corresponding to ultrashort wave radio set by described and be sent to FM treatment circuit with second and carry out demodulation process, produce simulated audio signal, described simulated audio signal is sent to the 4th simulation ultrashort wave radio set by the second simulation ultrashort wave radio set, 4th simulation ultrashort wave radio set receives simulated audio signal, and described simulated audio signal is sent to FM treatment circuit carries out FM modulation, the signal generated after FM modulation is carried out mixing, generate and simulate radiofrequency signal corresponding to ultrashort wave radio set with the 4th, simulate after radiofrequency signal corresponding to ultrashort wave radio set carries out power amplification by described obtain the radiofrequency signal after power amplification with the 4th, and the radiofrequency signal after this power amplification is sent into duplexer, by duplexer, the radiofrequency signal after power amplification is sent to ultrashort wave antenna, by ultrashort wave antenna, the emission of radio frequency signals after power amplification is gone out, receive the radiofrequency signal after described power amplification by the second simulation ultrashort wave hand-held set again, this completes the signal transmission from the first simulation ultrashort wave hand-held set to the second simulation ultrashort wave hand-held set.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (4)
1. the indirect communication device of a ultrashort wave Vehicle mounted station, it is characterized in that, comprising: ultrashort wave antenna, duplexer, the first digital ultrashort wave radio station, the second simulation ultrashort wave radio set, the 3rd digital ultrashort wave radio station, the 4th simulation ultrashort wave radio set, path selection unit;
Described duplexer has five ports, is respectively the first bidirectional port, the second emission port, the 3rd emission port, the 4th receiving port and the 5th receiving port, first digital ultrashort wave radio station comprises three ports, is the first rf signal reception end, the second audio signal output end, the 3rd audio signal output end respectively, second simulation ultrashort wave radio set comprises three ports, is the 4th rf signal reception end, the 5th audio signal output end and the 6th audio signal output end respectively, 3rd digital ultrashort wave radio station comprises three ports, is subtonic signal input part, the 8th audio signal input end, the 9th emission of radio frequency signals end frequently respectively, 4th simulation ultrashort wave radio set comprises three ports, is the tenth audio signal input end, the 11 audio signal input end and the 12 emission of radio frequency signals end respectively, described first bidirectional port is bi-directionally connected described ultrashort wave antenna, the described first rf signal reception end of described second emission port electrical connection, described second audio signal output end is electrically connected described subtonic signal input part frequently, described tenth audio signal input end of described 3rd audio signal output end electrical connection, the described 4th rf signal reception end of described 3rd emission port electrical connection, described 8th audio signal input end of described 5th audio signal output end electrical connection, described 11 audio signal input end of described 6th audio signal output end electrical connection, described 4th receiving port of described 9th emission of radio frequency signals end electrical connection, described 5th receiving port of described 12 emission of radio frequency signals end electrical connection,
Described path selection unit is used for optionally connecting the first path, alternate path, third path or the 4th path, described first path is described second audio signal output end and the path of described subtonic frequently between signal input part, described alternate path is the path between described 3rd audio signal output end and described tenth audio signal input end, described third path is the path between described 5th audio signal output end and described 8th audio signal input end, described 4th path is the path between described 6th audio signal output end and described 11 audio signal input end,
Ultrashort wave antenna received RF signal, and radiofrequency signal is sent to duplexer, radiofrequency signal enters the first digital ultrashort wave radio station or the second simulation ultrashort wave radio set by duplexer, first digital ultrashort wave radio station and the second simulation ultrashort wave radio set can convert radiofrequency signal to voice signal respectively, described voice signal enters the 3rd digital ultrashort wave radio station or the 4th simulation ultrashort wave radio set after being selected by path selection unit, 3rd digital ultrashort wave radio station and the 4th simulation ultrashort wave radio set can convert voice signal to radiofrequency signal, described radiofrequency signal is sent to ultrashort wave antenna through duplexer again.
2. the indirect communication device of a kind of ultrashort wave Vehicle mounted station as claimed in claim 1, it is characterized in that, described second simulation ultrashort wave radio set and the 4th simulation ultrashort wave radio set also comprise transceiver channel unit respectively, and described transceiver channel unit comprises local oscillation signal, multiplier, power amplification circuit and FM treatment circuit; Described multiplier comprises four ports, respectively: local oscillator input, the 3rd bidirectional interface, short-wave antenna input, mixed frequency signal output; 3rd bidirectional interface of the two-way electrical connection multiplier of described second bidirectional interface, the local oscillator input of multiplier is for accessing local oscillation signal, the input of the mixed frequency signal output electrical connection power amplification circuit of multiplier, the input of the output electrical connection ultrashort wave antenna of power amplification circuit, the short-wave antenna input of the output electrical connection multiplier of ultrashort wave antenna;
Described ultrashort wave antenna receives aerial radiofrequency signal, and described aerial radiofrequency signal is sent to multiplier; Simultaneously, local oscillation signal also enters multiplier, modulate after first local oscillation signal and aerial radiofrequency signal enter multiplier, obtain the first modulation signal, FM treatment circuit is used for carrying out FM demodulation to the first modulation signal, obtain the simulated audio signal after FM demodulation, then the simulated audio signal after described FM demodulation is play by audio interface;
Described audio interface obtains voice signal, voice signal enters FM treatment circuit by audio interface, obtain the signal through FM treatment circuit, meanwhile, the second local oscillation signal enters multiplier, and the second local oscillation signal and the described signal through FM treatment circuit carry out mixed modulated in multiplier, obtain the second mixed modulated signal, power amplifier carries out power amplification to described second mixed modulated signal, obtains power signal, and is blazed abroad by described power signal by ultrashort wave antenna.
3. the indirect communication device of a kind of ultrashort wave Vehicle mounted station as claimed in claim 1, it is characterized in that, described first digital ultrashort wave radio station and the 3rd digital ultrashort wave radio station are also respectively arranged with ultrashort wave antenna, band pass filter, radiofrequency signal analog to digital converter, FPGA, dsp chip, audio digital to analog converter, audio A/D converter, radiofrequency signal digital to analog converter, radiofrequency signal analog to digital converter, power amplifier, low pass filter, audio interface;
FPGA comprises two bidirectional ports, two inputs and two outputs, is respectively: a FPGA bidirectional port, the 2nd FPGA bidirectional port, a FPGA input, the 2nd FPGA input, a FPGA output, the 2nd FPGA output; Dsp chip comprises a DSP bidirectional port, and ultrashort wave antenna comprises a ultrashort wave signals receiving terminal and a ultrashort wave signals output; The DSP bidirectional port of the one FPGA bidirectional port electrical connection dsp chip of FPGA, the input of the ultrashort wave signals output electrical connection band pass filter of the ultrashort wave output ultrashort wave antenna of described ultrashort wave antenna, the input of the output electrical connection radiofrequency signal analog to digital converter of band pass filter, a FPGA input of the output electrical connection FPGA of radiofrequency signal analog to digital converter; The output of the 2nd FPGA input electrical connection audio A/D converter of FPGA, the input of the one FPGA output electrical connection audio digital to analog converter of FPGA, the input of the 2nd FPGA output electrical connection radiofrequency signal digital to analog converter of FPGA, the input of the output electrical connection power amplifier of radiofrequency signal digital to analog converter, the input of the output electrical connection low pass filter of power amplifier, the ultrashort wave signals receiving terminal of the output electrical connection ultrashort wave antenna of low pass filter; The output of the input electrical connection audio interface of audio A/D converter, the output of the input electrical connection audio digital to analog converter of audio interface;
Ultrashort wave antenna is used for received RF signal, and the radiofrequency signal received is sent to band pass filter, band pass filter carries out bandpass filtering treatment to the described radiofrequency signal received, obtain bandpass signal, again this bandpass signal is sent to radiofrequency signal analog to digital converter, described bandpass signal is converted to digital radio signal by radiofrequency signal analog to digital converter, and this digital radio signal is sent to FPGA, FPGA is used for carrying out down-converted to described digital radio signal, again the digital baseband signal produced after down-converted is sent to dsp chip, dsp chip is used for carrying out base band demodulating to described digital baseband signal, again the digital audio and video signals generated after base band demodulating is sent to FPGA, described digital audio and video signals is sent to audio digital to analog converter by FPGA again, audio digital to analog converter carries out digital-to-analogue conversion to described digital audio and video signals, obtain simulated audio signal, and this simulated audio signal is sent to audio interface, described simulated audio signal play by audio interface external loudspeaker,
Or, described simulated audio signal is sent to audio A/D converter and carries out analog-to-digital conversion by audio interface, obtain digital audio and video signals, again described digital audio and video signals is sent to FPGA, FPGA is also for being sent to dsp chip by described digital audio and video signals, dsp chip is used for carrying out baseband modulation to described digital audio and video signals, and the digital baseband signal produced after baseband modulation is sent to FPGA, FPGA is used for carrying out upconversion process to described digital baseband signal, and the digital radio signal generated after upconversion process is sent to radiofrequency signal digital to analog converter, radiofrequency signal digital to analog converter carries out digital-to-analogue conversion to described digital radio signal, obtain analog radio-frequency signal, and this analog radio-frequency signal is sent to power amplifier, after power amplifier carries out power amplification to described analog radio-frequency signal, be sent to low pass filter again and carry out filtering process, finally obtain low-passed analog radiofrequency signal, and then described low-passed analog radiofrequency signal is sent to ultrashort wave antenna.
4. the indirect communication device of a kind of ultrashort wave Vehicle mounted station as claimed in claim 1, is characterized in that, described ultrashort wave antenna is sucker antenna or omnidirectional antenna.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106130598A (en) * | 2016-08-31 | 2016-11-16 | 广州中海达卫星导航技术股份有限公司 | A kind of radio station data transfer method and device |
| CN106741989A (en) * | 2016-12-27 | 2017-05-31 | 哈尔滨飞机工业集团有限责任公司 | A kind of Wing Newsletter encodes injection device |
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| CN205356344U (en) * | 2015-12-31 | 2016-06-29 | 陕西烽火实业有限公司 | Relaying communication device of on -vehicle platform of ultrashort wave |
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| CN204272108U (en) * | 2014-12-18 | 2015-04-15 | 陕西烽火实业有限公司 | A kind ofly can support the communicator of ultrashort wave relaying with short-wave radio set intercommunication |
| CN205356344U (en) * | 2015-12-31 | 2016-06-29 | 陕西烽火实业有限公司 | Relaying communication device of on -vehicle platform of ultrashort wave |
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| CN106130598A (en) * | 2016-08-31 | 2016-11-16 | 广州中海达卫星导航技术股份有限公司 | A kind of radio station data transfer method and device |
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