CN116318228A - Ultra-wideband reconfigurable full-band high-speed frequency hopping transceiver - Google Patents
Ultra-wideband reconfigurable full-band high-speed frequency hopping transceiver Download PDFInfo
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- CN116318228A CN116318228A CN202310261279.8A CN202310261279A CN116318228A CN 116318228 A CN116318228 A CN 116318228A CN 202310261279 A CN202310261279 A CN 202310261279A CN 116318228 A CN116318228 A CN 116318228A
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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
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
- H04B1/7136—Arrangements for generation of hop frequencies, e.g. using a bank of frequency sources, using continuous tuning or using a transform
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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
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- 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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Abstract
The invention discloses an ultra-wideband reconfigurable full-band high-speed frequency hopping transceiver, and belongs to the field of UHF band communication. The digital control frequency hopping filter comprises a power supply, a control unit, a reference clock unit, a first controllable attenuator, a first amplifying unit, a first hopping frequency unit, a switch filter amplifying unit, a second hopping frequency unit, a switch filter unit, a second amplifying unit, a second controllable attenuator, a third amplifying unit, an electrically tunable filter unit, a fourth amplifying unit, a digital control hopping frequency filter unit, a third controllable attenuator, a detection unit and a bandwidth filter bank. The invention has better effects on the problems of widening the working frequency band, interfering the wide-band signal, blocking the wide-band noise, resisting the blocking interference and the like, ensures that the in-band gain is flatter, fully realizes the automatic calibration of the filter on the frequency, and has the characteristics of good frequency selection performance, good tuning precision and the like.
Description
Technical Field
The invention relates to an ultra-wideband reconfigurable full-band high-speed frequency hopping transceiver, belonging to the field of UHF band communication.
Background
In a wireless communication system, a transceiver has an extremely important role in the wireless communication system because the transceiver comprises two functions of a transmitter and a receiver, and has the characteristics of high frequency, low power consumption, small size and the like. Meanwhile, in the frequency of wireless communication, a communication dead zone exists due to the influence of a shortwave communication ionosphere, the communication distance of a VHF radio station is generally not more than 30km, and the satellite communication cost is high and the implementation is complex, so that the VHF radio station cannot be used in a large amount. The microwave frequency band is wider, and the signal transmission quality is better, so that more and more scientific researchers are devoting to the research of transceivers in the microwave frequency band, and particularly the research of transceivers in the UHF frequency band has higher practical engineering research value. With the development of new technologies and new concepts such as wireless communication technology, computer technology, microelectronics and the like, although research on a UHF frequency band transceiver has new breakthrough, the UHF frequency band transceiver still has the defects in the aspects of wideband channel application, anti-blocking interference, gain leveling and full-band high-speed frequency hopping at present.
Disclosure of Invention
Aiming at the defects, the invention provides an ultra-wideband reconfigurable full-band high-speed frequency hopping transceiver which is optimally designed in the aspects of ultra-wideband, wideband reconfigurability, full-band, high-speed frequency hopping, anti-blocking interference, power leveling and the like.
In order to achieve the above object, the present invention is realized by the following technical scheme:
an ultra-wideband reconfigurable full-band high-speed frequency hopping transceiver comprises a power supply and control unit 1, a reference clock unit 2, a first controllable attenuator 3, a first amplifying unit 4, a first hopping frequency unit 5, a switch filter amplifying unit 6, a second hopping frequency unit 7, a switch filter unit 8, a second amplifying unit 9, a second controllable attenuator 10, a third amplifying unit 11, an electrically tunable filter unit 12, a fourth amplifying unit 13, a numerical control hopping frequency filter unit 14, a third controllable attenuator 15, a detection unit 16 and a bandwidth filter group 17;
the power supply and control unit 1 is used for providing power supply and controlling related units;
the reference clock unit 2 is used for providing reference clock signals for the first hopping frequency unit 5 and the second hopping frequency unit 7;
the first controllable attenuator 3 is used for attenuating an intermediate frequency modulation signal sent by the baseband and outputting the intermediate frequency modulation signal to the first amplifying unit 4;
the first amplifying unit 4 is configured to amplify and output the transmitted intermediate frequency modulation signal to the first hopping unit 5, and is further configured to amplify and output the intermediate frequency demodulation signal received through the bandwidth filter bank 17 to the baseband signal receiving end;
the first hopping unit 5 is configured to up-convert the intermediate frequency modulation signal amplified by the first amplifying unit 4 to a first intermediate frequency modulation signal and output the first intermediate frequency modulation signal to the switch filter power amplifying unit 6, and further configured to down-convert the first intermediate frequency signal to an intermediate frequency demodulation signal and output the first intermediate frequency demodulation signal to the bandwidth filter bank 17;
the filter bank 17 is used for selecting and filtering the intermediate frequency demodulation signal and outputting the intermediate frequency demodulation signal to the first amplifying unit 4;
the switch filter amplifying unit 6 is used for filtering, amplifying and selecting the first intermediate frequency modulation signal and outputting the first intermediate frequency modulation signal to the second hopping frequency unit 7, and is also used for amplifying, filtering and selecting the first intermediate frequency signal and outputting the first intermediate frequency modulation signal to the first hopping frequency unit 5;
the second hopping unit 7 is configured to up-convert the first intermediate frequency modulation signal to a first transmission rf signal and output the first transmission rf signal to the switch filter unit 8, and further configured to down-convert the first reception rf signal passing through the switch filter unit 8 to a first intermediate frequency signal and output the first intermediate frequency signal to the switch filter amplifying unit 6;
the switch filter unit 8 is configured to select and filter the first transmit radio frequency signal and output the first transmit radio frequency signal to the second amplifying unit 9, and is also configured to select and filter the first receive radio frequency signal that passes through the second amplifying unit 9 and output the first receive radio frequency signal to the second hopping frequency unit 7;
the second amplifying unit 9 is configured to amplify and output the first transmission radio frequency signal passing through the switch filter unit 8 to the second controllable attenuator 10, and is also configured to output the first reception radio frequency signal passing through the second controllable attenuator 10 to the switch filter unit 8;
the second controllable attenuator 10 is used for attenuating the first transmission radio frequency signal passing through the second amplifying unit 9 and outputting to the third amplifying unit 11, and is also used for attenuating the first reception radio frequency signal passing through the third amplifying unit 11 and outputting to the second amplifying unit 9;
the third amplifying unit 11 is configured to amplify and output the first transmission rf signal passing through the second controllable attenuator 10 to the electrically tunable filter unit 12, and is further configured to output the first reception rf signal passing through the electrically tunable filter unit 12 to the second controllable attenuator 10;
the electrically tunable filter unit 12 is configured to filter and output the first transmission radio frequency signal that passes through the third amplifying unit 11 to the fourth amplifying unit 13, and is also configured to filter and output the first reception radio frequency signal that passes through the third amplifying unit 13 to the third amplifying unit 11;
the fourth amplifying unit 13 is configured to amplify and output the first transmission signal that passes through the electrically tunable filter unit 13 to the digitally controlled frequency hopping filter unit 14, and is also configured to amplify and output the first received radio frequency signal that passes through the digitally controlled frequency hopping filter unit 14 to the electrically tunable filter unit 12;
the digital control frequency hopping filter unit 14 is configured to select and filter the first transmission radio frequency signal that passes through the fourth amplifying unit 13 and output a final radio frequency signal, and is also configured to select and filter the received radio frequency signal and obtain a first received radio frequency signal, and output the first received radio frequency signal to the fourth amplifying unit 13;
the third controllable attenuator 15 is used for attenuating the received radio frequency signal and outputting to the unit 14 of the digital control frequency hopping filter;
the detection unit 16 is configured to detect the power level of the finally transmitted rf signal and the initially received rf signal.
Further, the power supply and control unit 1 comprises a DC/DC power supply module, an LDO linear voltage stabilizer module and an FPGA module; the DC/DC power supply module inputs 14VDC voltage and outputs three DC voltages of 3.6V, 5.5V and 11.5V; the LDO linear voltage stabilizer module corresponds to different input and output voltages: 3.6V is output by the LDO voltage stabilizer module, 5.5V is output by the LDO voltage stabilizer module, and 11.5V is output by the LDO voltage stabilizer module;
the FPGA module is used for controlling other related units, including: the internal and external references of the reference clock 2 are controlled, attenuation values of the first controllable attenuator 3, the second controllable attenuator 10 and the third controllable attenuator 15 are controlled, working local oscillators of the first frequency conversion unit 5 and the second frequency conversion unit 7 are controlled, frequency band selection of the switch filter amplifying unit 6, the switch filter unit 8 and the bandwidth filter group 17 is controlled, frequency point selection of the electric tuning filter unit 12 and the numerical control frequency hopping filter unit 14 is controlled, and receiving and transmitting channels of the first amplifying unit 4, the second amplifying unit 9, the third amplifying unit 11 and the fourth amplifying unit 14 are controlled.
Further, the reference clock unit 2 includes an internal clock module, an external clock module, a clock selection module, and a clock buffer; the input end of the reference clock unit is externally connected with external reference clock signals 100MHz and 61.6MHz, the internal clock module is used for generating an internal reference clock 100MHz, the clock selection module is used for selecting an internal clock or an external clock signal, the clock buffer is used for dividing the selected reference clock signal into four paths of output, two paths of output are output to the first hopping frequency unit 5, and the other two paths of output are output to the second hopping frequency unit 7.
Further, the transmitting channel of the first amplifying unit 4 is composed of 2 radio frequency switches and 1 amplifier, and the receiving channel is composed of 3 radio frequency switches and 2 amplifiers.
Further, the bandwidth filter group 17 is formed by combining three intermediate frequency bandwidth filters and 2 radio frequency switches, wherein the intermediate frequency bandwidth filters are respectively a 5MHz bandwidth filter, a 10MHz bandwidth filter and a 20MHz bandwidth filter.
Further, the first hopping unit 5 and the second hopping unit 7 have the same structure and each include 2 local oscillation modules, 2 amplifiers, 1 radio frequency switch and 1 mixer; the local oscillation module is used for generating local oscillation signals; the amplifier is used for amplifying the local oscillation signal; the mixer in the first hopping frequency unit is used for up-converting the intermediate frequency modulation signal amplified by the first amplifying unit 4 to a first intermediate frequency modulation signal and down-converting the first intermediate frequency signal to an intermediate frequency demodulation signal; the mixer of the second hopping frequency unit is used for up-converting the first intermediate frequency modulation signal to a first transmission radio frequency signal and outputting the first transmission radio frequency signal to the switch filter unit 8, and is also used for down-converting the first reception radio frequency signal passing through the switch filter unit 8 to a first intermediate frequency signal and outputting the first intermediate frequency signal to the switch filter amplifying unit 6;
in the local oscillation module, a rapid PLL and a ping-pong double-loop frequency hopping mode are adopted to realize 4000 hops/second in a full frequency band; in the first hopping unit 5, the local oscillation module is used as a function of low local oscillation, and six different frequencies are generated: 1760Mhz, 1730MHz, 2130MHz, 2160MHz, 1660MHz, 1630MHz; in the second hopping unit 7, the local oscillation module is used as a function of high local oscillation, and generates 5 sections of different frequency ranges: [1910-2830], [2375-2790], [2500-2830], [3240-3860], [2980-3770], which are used for synthesizing the needed radio frequency 225-2500MHz and three intermediate frequencies 1270MHz, 1740MHz and 2150MHz.
Further, the switch filter amplifying unit 6 is composed of 2 radio frequency switches, 1 amplifier group and 6 SAW filters; among them, SAW filters have 3 different center frequencies: 1270Mhz, 1740MHz, 2150MHz, with 20MHz bandwidth; the amplifier group comprises 2 amplifiers, which are divided into a transmit channel and a receive channel.
Further, the switch filter unit 8 is composed of 2 radio frequency switches, 5 low pass filters and 1 high pass filter; which divides the operating band of the transceiver into 5 segments: the high-pass filter changes the frequency band DC-2500MHz into 1650MHz-5000MHz.
Further, the second amplifying unit 9, the third amplifying unit 11 and the fourth amplifying unit 13 have the same structure, and each includes 2 radio frequency switches and 2 amplifiers, and the 2 amplifiers act on the transmitting channel and the receiving channel respectively.
The technical scheme adopted by the invention has the following advantages:
1. the invention adopts wideband reconfigurable radio frequency technology, and is particularly characterized in that the transceiver uses a numerical control frequency hopping filter, an electric tuning filter, a power amplifier with wide frequency band and high linearity, a high-speed frequency hopping frequency combination technology and the like. Therefore, the method has better improvement on the problems of widening of the working frequency band, wide-band signal interference, broadband noise blocking, blocking resistance and the like.
2. The invention adopts the secondary superheterodyne frequency conversion technology, and the secondary superheterodyne frequency conversion technology can inhibit the leakage of the local oscillator in the frequency conversion, the sideband interference of the up-conversion and the image interference of the down-conversion, so that the far-end inhibition capability of the filter can be exerted, and the frequency configuration is more convenient and easier.
3. The invention adopts the fast locking PLL and the frequency hopping frequency combination technology of the ping-pong double loop to realize the broadband high-speed characteristic, so that the output frequency is higher and the spurious output degree is lower.
4. The invention adopts a plurality of broadband controllable attenuators, multistage amplifying units with different frequency bands and detection units, so that the power can be regulated in a wider working frequency band in the equipment, and the output power of different frequency points is basically kept consistent.
5. The invention adopts the electric tuning filter technology with frequency calibration, fully realizes the automatic calibration of the filter to the frequency, simultaneously can realize continuous tuning in a very wide frequency range, has good rate filtering property and has higher tuning speed. In addition, the frequency hopping function can be realized in the frequency band sub-unit and between sub-units.
6. The invention adopts the numerical control frequency hopping filter technology, and has the characteristics of high frequency hopping speed, good tuning precision, high frequency selecting performance, small insertion loss and the like.
Drawings
Fig. 1 is a schematic diagram of the overall structure of an ultra-wideband reconfigurable full-band high-speed frequency hopping transceiver in an embodiment of the present invention;
fig. 2 is a schematic diagram of the power supply and control unit 1 in fig. 1;
fig. 3 is a schematic diagram of the structure of the reference clock unit 2 in fig. 1;
fig. 4 is a schematic structural view of the first amplifying unit 4 in fig. 1;
fig. 5 is a schematic diagram of the structure of the band filter bank 17 in fig. 1;
fig. 6 is a schematic diagram of the structure of the first hopping unit 5 in fig. 1;
fig. 7 is a schematic diagram of the structure of the switching filter amplifying unit 6 in fig. 1;
fig. 8 is a schematic diagram of the structure of the switching filter unit 8 in fig. 1;
fig. 9 is a schematic diagram of the structure of the second amplifying unit 9 in fig. 1.
Description of the embodiments
The invention is described in further detail below with reference to the drawings and the detailed description.
An ultra-wideband reconfigurable full-band high-speed frequency hopping transceiver comprises a power supply and control unit 1, a reference clock unit 2, a first controllable attenuator 3, a first amplifying unit 4, a first hopping frequency unit 5, a switch filter amplifying unit 6, a second hopping frequency unit 7, a switch filter unit 8, a second amplifying unit 9, a second controllable attenuator 10, a third amplifying unit 11, an electrically tunable filter unit 12, a fourth amplifying unit 13, a numerical control hopping frequency filter unit 14, a third controllable attenuator 15, a detection unit 16 and a bandwidth filter group 17.
The power supply and control unit 1 comprises a DC/DC power supply module, an LDO linear voltage stabilizer module and an FPGA module. The reference clock unit 2 comprises an internal clock module, an external clock module, a clock selection module and a clock buffer. The first amplifying unit 4 comprises an amplifier and a radio frequency switch. The first hopping unit 5 comprises a local oscillation module, a radio frequency switch, an amplifier and a mixer. The switch filter amplifying unit 6 includes a radio frequency switch, a SAW filter and an amplifier. The second hopping unit 7 comprises a local oscillation module, a radio frequency switch, an amplifier and a mixer. The switch filter unit 8 comprises a radio frequency switch and a low pass filter. The second amplifying unit 9 comprises a power amplifier and a radio frequency switch. The third amplifying unit 11 includes an amplifier and a radio frequency switch. The fourth amplifying unit 13 includes an amplifier and a radio frequency switch.
The reference clock unit 2 is arranged to provide a reference clock signal to the first and second frequency hopping units 5, 7. The first controllable attenuator 3 is used for attenuating the intermediate frequency modulation signal sent by the baseband and outputting the intermediate frequency modulation signal to the first amplifying unit 4. The first amplifying unit 4 is configured to amplify and output the transmitted intermediate frequency modulation signal to the first hopping unit 5, and is also configured to amplify and output the received intermediate frequency demodulation signal passing through the bandwidth filter bank 17 to the baseband signal receiving end. The first hopping unit 5 is configured to up-convert the intermediate frequency modulation signal amplified by the first amplifying unit 4 to a first intermediate frequency modulation signal and output the first intermediate frequency modulation signal to the switch filter power amplifying unit 6, and also configured to down-convert the first intermediate frequency signal to an intermediate frequency demodulation signal and output the first intermediate frequency signal to the bandwidth filter bank 17. The filter bank 17 is used for selecting and filtering the intermediate frequency demodulation signal and outputting the intermediate frequency demodulation signal to the first amplifying unit 4. The switch filter amplifying unit 6 is used for filtering, amplifying and selecting the first intermediate frequency modulation signal and outputting the first intermediate frequency modulation signal to the second hopping frequency unit 7, and is also used for amplifying, filtering and selecting the first intermediate frequency signal and outputting the first intermediate frequency modulation signal to the first hopping frequency unit 5. The second hopping unit 7 is configured to up-convert the first intermediate frequency modulation signal to a first transmission rf signal and output the first transmission rf signal to the switch filter unit 8, and further configured to down-convert the first reception rf signal passing through the switch filter unit 8 to a first intermediate frequency signal and output the first intermediate frequency signal to the switch filter amplifying unit 6. The switch filter unit 8 is configured to select and filter the first transmit radio frequency signal and output the first transmit radio frequency signal to the second amplifying unit 9, and is also configured to select and filter the first receive radio frequency signal that passes through the second amplifying unit 9 and output the first receive radio frequency signal to the second hopping frequency unit 7. The second amplifying unit 9 is configured to amplify and output the first transmission radio frequency signal passing through the switching filter unit 8 to the second controllable attenuator 10, and is also configured to output the first reception radio frequency signal passing through the second controllable attenuator 10 to the switching filter unit 8. The second controllable attenuator 10 is used for attenuating the first transmission radio frequency signal passing through the second amplifying unit 9 and outputting to the third amplifying unit 11, and is also used for attenuating the first reception radio frequency signal passing through the third amplifying unit 11 and outputting to the second amplifying unit 9. The third amplifying unit 11 is configured to amplify and output the first transmission rf signal passing through the second controllable attenuator 10 to the electrically tunable filter unit 12, and is also configured to output the first reception rf signal passing through the electrically tunable filter unit 12 to the second controllable attenuator 10. The electrically tunable filter unit 12 is configured to filter and output the first transmission radio frequency signal that has passed through the third amplifying unit 11 to the fourth amplifying unit 13, and is also configured to filter and output the first reception radio frequency signal that has passed through the third amplifying unit 13 to the third amplifying unit 11. The fourth amplifying unit 13 is configured to amplify and output the first transmission signal passing through the electrically tunable filter unit 13 to the digitally controlled frequency hopping filter unit 14, and is also configured to amplify and output the first reception radio frequency signal passing through the digitally controlled frequency hopping filter unit 14 to the electrically tunable filter unit 12. The digitally controlled frequency hopping filter unit 14 is configured to select and filter the first transmitted radio frequency signal that passes through the fourth amplifying unit 13 and output a final radio frequency signal, and is also configured to select and filter the received radio frequency signal and obtain a first received radio frequency signal, and output the first received radio frequency signal to the fourth amplifying unit 13. The third controllable attenuator 15 is used for attenuating the received radio frequency signal and outputting to the unit 14 of the digitally controlled frequency hopping filter. The detection unit 16 is configured to detect the power level of the finally transmitted rf signal and the initially received rf signal. The power supply and control module 1 is used for supplying power to all the functional units and controlling relevant functional modules.
The following is a more specific example:
an ultra-wideband reconfigurable full-band high-speed frequency hopping transceiver is shown in fig. 1, and comprises a power supply and control unit 1, a reference clock unit 2, a first controllable attenuator 3, a first amplifying unit 4, a first hopping frequency unit 5, a switch filter amplifying unit 6, a second hopping frequency unit 7, a switch filter unit 8, a second amplifying unit 9, a second controllable attenuator 10, a third amplifying unit 11, an electrically tunable filter unit 12, a fourth power amplifying unit 13, a digital control hopping frequency filter unit 14, a third controllable attenuator 15, a detecting unit 16 and a bandwidth filter group 17.
Wherein the reference clock unit 2 is configured to provide a reference clock signal to the first frequency hopping unit 5 and the second frequency hopping unit 7. The first controllable attenuator 3 is used for attenuating the intermediate frequency modulation signal sent by the baseband and outputting the intermediate frequency modulation signal to the first amplifying unit 4. The first amplifying unit 4 is configured to amplify and output the transmitted intermediate frequency modulation signal to the first hopping unit 5, and is also configured to amplify and output the intermediate frequency demodulation signal passing through the bandwidth filter bank 17 to the baseband signal receiving end. The first hopping unit 5 is configured to up-convert the intermediate frequency modulation signal amplified by the first amplifying unit 4 to a first intermediate frequency modulation signal and output the first intermediate frequency modulation signal to the switch filter amplifying unit 6, and also configured to down-convert the first intermediate frequency signal to an intermediate frequency demodulation signal and output the first intermediate frequency demodulation signal to the bandwidth filter bank 17. The filter bank 17 is used for selecting and filtering the intermediate frequency demodulation signal and outputting the intermediate frequency demodulation signal to the first amplifying unit 4. The switch filter amplifying unit 6 is used for filtering, amplifying and selecting the first intermediate frequency modulation signal and outputting the first intermediate frequency modulation signal to the second hopping frequency unit 7, and is also used for amplifying, filtering and selecting the first intermediate frequency signal and outputting the first intermediate frequency modulation signal to the first hopping frequency unit 5. The second hopping unit 7 is configured to up-convert the first intermediate frequency modulation signal to a first transmission rf signal and output the first transmission rf signal to the switch filter unit 8, and further configured to down-convert the first reception rf signal passing through the switch filter unit 8 to a first intermediate frequency signal and output the first intermediate frequency signal to the switch filter power amplifying unit 6. The switch filter unit 8 is configured to select and filter the first transmit radio frequency signal and output the first transmit radio frequency signal to the second amplifying unit 9, and is also configured to select and filter the first receive radio frequency signal that passes through the second amplifying unit 9 and output the first receive radio frequency signal to the second hopping frequency unit 7. The second amplifying unit 9 is configured to amplify and output the first transmission radio frequency signal passing through the switching filter unit 8 to the second controllable attenuator 10, and is also configured to output the first reception radio frequency signal passing through the second controllable attenuator 10 to the switching filter unit 8. The second controllable attenuator 10 is used for attenuating the first transmission radio frequency signal passing through the second amplifying unit 9 and outputting to the third amplifying unit 11, and is also used for attenuating the first reception radio frequency signal passing through the third amplifying unit 11 and outputting to the second amplifying unit 9. The third amplifying unit 11 is configured to amplify and output the first transmission rf signal passing through the second controllable attenuator 10 to the electrically tunable filter unit 12, and is also configured to output the first reception rf signal passing through the electrically tunable filter unit 12 to the second controllable attenuator 10. The electrically tunable filter unit 12 is configured to filter and output the first transmission radio frequency signal that has passed through the third amplifying unit 11 to the fourth amplifying unit 13, and is also configured to filter and output the first reception radio frequency signal that has passed through the third amplifying unit 13 to the third amplifying unit 11. The fourth amplifying unit 13 is configured to amplify and output the first transmission signal passing through the electrically tunable filter unit 13 to the digitally controlled frequency hopping filter unit 14, and is also configured to amplify and output the first reception radio frequency signal passing through the digitally controlled frequency hopping filter unit 14 to the electrically tunable filter unit 12. The digitally controlled frequency hopping filter unit 14 is configured to select and filter the first transmitted radio frequency signal that passes through the fourth amplifying unit 13 and output a final radio frequency signal, and is also configured to select and filter the received radio frequency signal and obtain a first received radio frequency signal, and output the first received radio frequency signal to the fourth amplifying unit 13. The third controllable attenuator 15 is used for attenuating the received radio frequency signal and outputting to the unit 14 of the digitally controlled frequency hopping filter. The detection unit 16 is configured to detect the power level of the finally transmitted rf signal and the initially received rf signal. The power supply and control module 1 is used for supplying power to all the functional units and controlling relevant functional modules.
Fig. 2 is a schematic diagram of the structure of the power supply and control unit 1. The LDO linear voltage regulator comprises a DC/DC power module, an LDO linear voltage regulator module and an FPGA module. The DC/DC power supply module inputs 14VDC voltage and outputs 3.6V, 5.5V and 11.5V of three DC voltages. The LDO linear voltage stabilizer module corresponds to different input and output voltages: 3.6V is output by the LDO voltage stabilizer module. 5.5V is output by the LDO voltage stabilizer module. 11.5V is output by the LDO voltage stabilizer module. The FPGA module is used for controlling each functional module.
Fig. 3 is a schematic diagram of the structure of the reference clock unit 2. The clock buffer comprises an internal clock module, an external clock module, a clock selection module and a clock buffer. The input end of the reference clock unit is externally connected with external reference clock signals of 100MHz and 61.6MHz. The internal clock module is used for generating an internal reference clock of 100MHz. The clock selection module is used for selecting an internal clock or an external clock signal. The clock buffer is used for outputting the selected reference clock signal in four ways. Wherein the output ports 1 and 2 are connected with the first hopping frequency unit 5, and the output ports 3 and 4 are connected with the second hopping frequency unit 7.
Fig. 4 is a schematic structural view of the first amplifying unit 4. The transmitting channel consists of 2 radio frequency switches and 1 path of amplifier, and the receiving channel consists of 3 radio frequency switches and 2 paths of amplifier.
Fig. 5 is a schematic diagram of the structure of the bandwidth filter bank 17. The device is formed by combining three paths of intermediate frequency bandwidth filters and 2 radio frequency switches, wherein the intermediate frequency bandwidth filters are respectively a 5MHz bandwidth filter, a 10MHz bandwidth filter and a 20MHz bandwidth filter.
Fig. 6 is a schematic diagram of the structure of the first hopping unit 5. The second hopping frequency unit 7 has the same composition structure as the first hopping frequency unit 5, and comprises 2 local oscillation modules, 2 amplifiers, 1 radio frequency switch and 1 mixer. The local oscillation module is used for generating local oscillation signals. The amplifier is used for amplifying the local oscillation signal. The mixer in the first hopping unit is used for up-converting the intermediate frequency modulation signal amplified by the first amplifying unit 4 to a first intermediate frequency modulation signal and down-converting the first intermediate frequency signal to an intermediate frequency demodulation signal. The mixer of the second hopping unit is used for up-converting the first intermediate frequency modulation signal to the first transmission radio frequency signal and outputting the first transmission radio frequency signal to the switch filter unit 8, and is also used for down-converting the first reception radio frequency signal passing through the switch filter unit 8 to the first intermediate frequency signal and outputting the first reception radio frequency signal to the switch filter amplifying unit 6. In the local oscillation module, a fast PLL and a ping-pong double-loop frequency hopping technology are adopted, so that the frequency of local oscillation output is higher, spurious output is smaller, and meanwhile, the characteristic of high-speed frequency hopping is ensured, namely 4000 hops per second with high efficiency and performance can be realized in a full frequency band. The first hopping unit 5 is mainly used as a low local oscillator function, which mainly generates six different frequencies 1760Mhz, 1730Mhz, 2130Mhz, 2160Mhz, 1660Mhz, 1630Mhz. The second hopping unit 7 is mainly used as a function of a high local oscillator, and generates 5 different frequency ranges [1910-2830], [2375-2790], [2500-2830], [3240-3860], [2980-3770], which are used for synthesizing the required radio frequency 225-2500MHz and three intermediate frequencies 1270MHz, 1740MHz and 2150MHz.
Fig. 7 is a schematic diagram of the structure of the switching filter amplifying unit 6. It consists of 2 radio frequency switches, 1 amplifier bank and 6 SAW filters. Among them, SAW filters have 3 different center frequencies: f1 =127mhz, f2=1740mhz, f3=2150 MHz, and the bandwidth was 20MHz. The amplifier group comprises 2 amplifiers, which are divided into a transmit channel and a receive channel.
Fig. 8 is a schematic diagram of the structure of the switching filter unit 8. It consists of 2 radio frequency switches, 5 low pass filters and 1 high pass filter. Which divides the operating band of the transceiver into 5 segments. In fig. 8: f4 =630 MHz, f5=800 MHz, f6=1000 MHz, f7=1700 MHz, f8=2500 MHz, f9=1650 MHz, f10=5000 MHz.
Fig. 9 is a schematic structural view of the second amplifying unit 9. The third amplifying unit 11, the fourth amplifying unit 13 and the second amplifying unit 9 have the same composition structure, and each comprise 2 radio frequency switches and 2 amplifiers, wherein the 2 amplifiers respectively act on a transmitting channel and a receiving channel.
In a word, the invention adopts the broadband reconfigurable radio frequency technology, and has better improvement on the problems of the expansion of the working frequency band, the signal interference of the broadband frequency band, the blocking of broadband noise, the blocking resistance of blocking interference and the like. The invention improves the frequency hopping speed by utilizing the frequency hopping frequency combination mode of the quick locking PLL and the ping-pong double loop. The invention adopts a plurality of broadband controllable attenuators, a multi-stage amplifying unit with different frequency bands and a detection unit, so that the in-band gain is flatter. The invention adopts the technology of the electric-tuning filter and the numerical control frequency-tuning filter, fully realizes the automatic calibration of the filter to the frequency, and has the characteristics of good frequency selection performance, good tuning precision and the like.
The invention can be used for switching receiving and transmitting modes, rapidly converting working frequency, amplifying power and detecting power in a UHF frequency band communication system, and optimizes the ultra-wideband, wideband reconfigurable, full-frequency band, high-speed frequency hopping, anti-blocking interference, power leveling and other aspects.
Claims (9)
1. The ultra-wideband reconfigurable full-band high-speed frequency hopping transceiver is characterized by comprising a power supply and control unit (1), a reference clock unit (2), a first controllable attenuator (3), a first amplifying unit (4), a first hopping frequency unit (5), a switch filter amplifying unit (6), a second hopping frequency unit (7), a switch filter unit (8), a second amplifying unit (9), a second controllable attenuator (10), a third amplifying unit (11), an electrically tunable filter unit (12), a fourth amplifying unit (13), a numerical control hopping frequency filter unit (14), a third controllable attenuator (15), a detecting unit (16) and a bandwidth filter group (17);
the power supply and control unit (1) is used for providing power supply and controlling the related units;
the reference clock unit (2) is used for providing reference clock signals for the first hopping frequency unit (5) and the second hopping frequency unit (7);
the first controllable attenuator (3) is used for attenuating intermediate frequency modulation signals sent by the baseband and outputting the intermediate frequency modulation signals to the first amplifying unit (4);
the first amplifying unit (4) is used for amplifying and outputting the transmitted intermediate frequency modulation signal to the first hopping frequency unit (5), and is also used for amplifying and outputting the intermediate frequency demodulation signal received by the bandwidth filter bank (17) to the baseband signal receiving end;
the first hopping frequency unit (5) is used for up-converting the intermediate frequency modulation signal amplified by the first amplifying unit (4) to a first intermediate frequency modulation signal and outputting the first intermediate frequency modulation signal to the switch filter power amplifying unit 6, and is also used for down-converting the first intermediate frequency signal to an intermediate frequency demodulation signal and outputting the first intermediate frequency signal to the bandwidth filter bank (17);
the filter bank 17 is used for outputting the intermediate frequency demodulation signal to the first amplifying unit (4) after selecting and filtering;
the switch filter amplifying unit (6) is used for filtering, amplifying and selecting the first intermediate frequency modulation signal and outputting the first intermediate frequency modulation signal to the second hopping frequency unit (7), and is also used for amplifying, filtering and selecting the first intermediate frequency signal and outputting the first intermediate frequency modulation signal to the first hopping frequency unit (5);
the second hopping frequency unit (7) is used for up-converting the first intermediate frequency modulation signal to a first transmission radio frequency signal and outputting the first transmission radio frequency signal to the switch filter unit (8), and is also used for down-converting the first reception radio frequency signal passing through the switch filter unit (8) to a first intermediate frequency signal and outputting the first intermediate frequency signal to the switch filter amplifying unit (6);
the switch filter unit (8) is used for selecting and filtering the first transmission radio frequency signal and outputting the first transmission radio frequency signal to the second amplifying unit (9), and is also used for selecting and filtering the first reception radio frequency signal passing through the second amplifying unit (9) and outputting the first reception radio frequency signal to the second hopping frequency unit (7);
the second amplifying unit (9) is used for amplifying and outputting the first transmission radio frequency signal passing through the switch filter unit (8) to the second controllable attenuator (10), and is also used for outputting the first reception radio frequency signal passing through the second controllable attenuator (10) to the switch filter unit (8);
the second controllable attenuator (10) is used for attenuating the first transmission radio frequency signal passing through the second amplifying unit (9) and outputting the first transmission radio frequency signal to the third amplifying unit (11), and is also used for attenuating the first reception radio frequency signal passing through the third amplifying unit (11) and outputting the first reception radio frequency signal to the second amplifying unit (9);
the third amplifying unit (11) is used for amplifying and outputting the first transmission radio frequency signal passing through the second controllable attenuator (10) to the electrically tunable filter unit (12), and is also used for outputting the first reception radio frequency signal passing through the electrically tunable filter unit (12) to the second controllable attenuator (10);
the electrically tunable filter unit (12) is used for filtering and outputting the first transmission radio frequency signal passing through the third amplifying unit (11) to the fourth amplifying unit (13), and is also used for filtering and outputting the first reception radio frequency signal passing through the third amplifying unit (13) to the third amplifying unit (11);
the fourth amplifying unit (13) is used for amplifying and outputting the first transmission signal passing through the electrically tunable filter unit 13 to the digital control frequency hopping filter unit (14), and is also used for amplifying and outputting the first received radio frequency signal passing through the digital control frequency hopping filter unit (14) to the electrically tunable filter unit (12);
the digital control frequency hopping filter unit (14) is used for selecting and filtering the first transmission radio frequency signal passing through the fourth amplifying unit (13) and outputting a final radio frequency signal, and is also used for selecting and filtering the received radio frequency signal and obtaining a first received radio frequency signal and outputting the first received radio frequency signal to the fourth amplifying unit (13);
the third controllable attenuator (15) is used for attenuating the received radio frequency signals and outputting the radio frequency signals to the unit 14 of the numerical control frequency hopping filter;
the detection unit (16) is used for detecting the power level of the finally transmitted radio frequency signal and the initially received radio frequency signal.
2. The ultra-wideband reconfigurable full-band high-speed frequency hopping transceiver of claim 1, wherein the power supply and control unit (1) comprises a DC/DC power supply module, an LDO linear voltage regulator module and an FPGA module; the DC/DC power supply module inputs 14VDC voltage and outputs three DC voltages of 3.6V, 5.5V and 11.5V; the LDO linear voltage stabilizer module corresponds to different input and output voltages: 3.6V is output by the LDO voltage stabilizer module, 5.5V is output by the LDO voltage stabilizer module, and 11.5V is output by the LDO voltage stabilizer module;
the FPGA module is used for controlling other related units, including: the method comprises the steps of controlling internal and external references of a reference clock (2), controlling attenuation values of a first controllable attenuator (3), a second controllable attenuator (10) and a third controllable attenuator (15), controlling working local oscillators of a first frequency conversion unit (5) and a second frequency conversion unit (7), controlling frequency band selection of a switch filter amplifying unit (6), a switch filter unit (8) and a bandwidth filter bank (17), controlling frequency point selection of an electrically tunable filter unit (12) and a digital control frequency hopping filter unit (14), and controlling receiving and transmitting channel selection of the first amplifying unit (4), the second amplifying unit (9), the third amplifying unit (11) and the fourth amplifying unit (14).
3. An ultra wideband reconfigurable full band high speed frequency hopping transceiver according to claim 1, characterized in that the reference clock unit (2) comprises an internal clock module, an external clock module, a clock selection module and a clock buffer; the input end of the reference clock unit is externally connected with external reference clock signals 100MHz and 61.6MHz, the internal clock module is used for generating an internal reference clock 100MHz, the clock selection module is used for selecting an internal clock or an external clock signal, the clock buffer is used for dividing the selected reference clock signal into four paths of output, two paths of output are output to the first hopping frequency unit (5), and the other two paths of output are output to the second hopping frequency unit (7).
4. An ultra wideband reconfigurable full band high speed frequency hopping transceiver as claimed in claim 1, characterized in that the transmit path of the first amplifying unit (4) consists of 2 radio frequency switches and 1 amplifier and the receive path consists of 3 radio frequency switches and 2 amplifiers.
5. An ultra wideband reconfigurable full band high speed frequency hopping transceiver as claimed in claim 1, characterized in that the bandwidth filter bank (17) is composed of three intermediate frequency bandwidth filters and 2 radio frequency switches, wherein the intermediate frequency bandwidth filters are respectively a 5MHz bandwidth filter, a 10MHz bandwidth filter, a 20MHz bandwidth filter.
6. The ultra-wideband reconfigurable full-band high-speed frequency hopping transceiver of claim 1, wherein the first hopping unit (5) and the second hopping unit (7) have the same structure and each comprise 2 local oscillator modules, 2 amplifiers, 1 radio frequency switch and 1 mixer; the local oscillation module is used for generating local oscillation signals; the amplifier is used for amplifying the local oscillation signal; the mixer in the first hopping frequency unit is used for up-converting the intermediate frequency modulation signal amplified by the first amplifying unit (4) to a first intermediate frequency modulation signal and down-converting the first intermediate frequency signal to an intermediate frequency demodulation signal; the mixer of the second hopping frequency unit is used for up-converting the first intermediate frequency modulation signal to a first transmission radio frequency signal and outputting the first transmission radio frequency signal to the switch filter unit (8), and is also used for down-converting the first reception radio frequency signal passing through the switch filter unit (8) to a first intermediate frequency signal and outputting the first intermediate frequency signal to the switch filter amplifying unit (6);
in the local oscillation module, a rapid PLL and a ping-pong double-loop frequency hopping mode are adopted to realize 4000 hops/second in a full frequency band; in the first hopping frequency unit (5), the local oscillation module is used as a function of low local oscillation, and six different frequencies are generated: 1760Mhz, 1730MHz, 2130MHz, 2160MHz, 1660MHz, 1630MHz; in the second hopping frequency unit (7), the local oscillation module is used as a function of a high local oscillation, and 5 sections of different frequency ranges are generated: [1910-2830], [2375-2790], [2500-2830], [3240-3860], [2980-3770], which are used for synthesizing the needed radio frequency 225-2500MHz and three intermediate frequencies 1270MHz, 1740MHz and 2150MHz.
7. An ultra wideband reconfigurable full band high speed frequency hopping transceiver as claimed in claim 1, wherein the switching filter amplifying unit (6) consists of 2 radio frequency switches, 1 amplifier bank and 6 SAW filters; among them, SAW filters have 3 different center frequencies: 1270Mhz, 1740MHz, 2150MHz, with 20MHz bandwidth; the amplifier group comprises 2 amplifiers, which are divided into a transmit channel and a receive channel.
8. An ultra wideband reconfigurable full band high speed frequency hopping transceiver as claimed in claim 1, characterized in that the switching filter unit (8) consists of 2 radio frequency switches, 5 low pass filters and 1 high pass filter; which divides the operating band of the transceiver into 5 segments: the high-pass filter changes the frequency band DC-2500MHz into 1650MHz-5000MHz.
9. An ultra-wideband reconfigurable full-band high-speed frequency hopping transceiver according to claim 1, characterized in that the second amplifying unit (9), the third amplifying unit (11) and the fourth amplifying unit (13) have the same structure and each comprise 2 radio frequency switches and 2 amplifiers, and the 2 amplifiers act on the transmitting channel and the receiving channel respectively.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117711114A (en) * | 2023-12-15 | 2024-03-15 | 扬州市妇幼保健院 | Automatic calling system for transfusion |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117711114A (en) * | 2023-12-15 | 2024-03-15 | 扬州市妇幼保健院 | Automatic calling system for transfusion |
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