CN108199766B - Goods shelf type satellite-borne transponder - Google Patents
Goods shelf type satellite-borne transponder Download PDFInfo
- Publication number
- CN108199766B CN108199766B CN201810307538.5A CN201810307538A CN108199766B CN 108199766 B CN108199766 B CN 108199766B CN 201810307538 A CN201810307538 A CN 201810307538A CN 108199766 B CN108199766 B CN 108199766B
- Authority
- CN
- China
- Prior art keywords
- module
- radio frequency
- intermediate frequency
- conversion
- relay
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18515—Transmission equipment in satellites or space-based relays
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Radio Relay Systems (AREA)
Abstract
The invention discloses a goods shelf type satellite-borne transponder, which comprises: the radio frequency transceiving module is used for receiving and transmitting the relay radio frequency signal to the ground; the intermediate frequency processing module is used for receiving the A/D conversion of signals, the D/A conversion of reference signals, the capturing and tracking of pseudo codes and carriers and the processing of channel signals; the secondary power supply module is used for power supply filtering, voltage conversion and transponder switch execution; the duplexer is used for filtering ground measurement and control radio frequency receiving signals and radio frequency transmitting signals; and the relay receiving filter is used for preselecting and filtering the relay measurement and control radio frequency receiving signal. The goods shelf type satellite-borne transponder adopts a unified hardware platform, changes different software settings, and replaces duplexers and relay receiving filters with different frequency points, thereby achieving the purposes of universal design, model type batch production and goods shelf type supply.
Description
Technical Field
The invention belongs to the technical field of aerospace measurement and control communication, and particularly relates to a shelf type satellite-borne transponder.
Background
The responder plays an extremely important role in space measurement and control, receives the ground uplink (relay forward) remote control signal and the ranging signal, and completes the functions of demodulation, despreading, ranging and speed measurement; and completing modulation, amplification and forwarding of the downlink telemetry signal and the downlink measurement signal.
In the past, different answering machines are required to be customized according to the requirements of tasks of different satellite models, so that not only are the cost of each item very high, but also the development period flow is very long. As the responder belongs to the traditional aerospace product, and various functions such as receiving, transmitting and the like are relatively fixed, a uniform hardware platform can be completely designed, the responder can be produced in batch, and the requirements of satellites of different models can be met by changing different software configurations and simply modifying the hardware configuration.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a shelf type satellite-borne transponder.
The technical scheme adopted by the invention is as follows:
a shelf-based space-borne transponder, comprising:
the radio frequency transceiving module is used for receiving and transmitting the relay radio frequency signal to the ground;
the intermediate frequency processing module is used for receiving the A/D conversion of signals, the D/A conversion of reference signals, the capturing and tracking of pseudo codes and carriers and the processing of channel signals;
the secondary power supply module is used for power supply filtering, voltage conversion and transponder switch execution;
the duplexer is used for filtering ground measurement and control radio frequency receiving signals and radio frequency transmitting signals;
and the relay receiving filter is used for preselecting and filtering the relay measurement and control radio frequency receiving signal.
Preferably, the radio frequency transceiver module includes a relay communication radio frequency channel and a ground communication radio frequency channel, and both the relay communication radio frequency channel and the ground communication radio frequency channel are connected to the intermediate frequency processing module.
Preferably, in the relay communication radio frequency channel: the wireless communication device comprises a relay receiving filter, a first low-noise amplifier module, a first radio frequency filter, a first down-conversion module, a first intermediate frequency filter, a first amplifier/AGC module, a first amplifier module, a second intermediate frequency filter, an intermediate frequency processing module, a first reference filter, a second amplifier module, a first local oscillator module, a first power divider, a third amplifier module, a first transmission modulation module and a first transmission filter which are sequentially connected, wherein the first power divider is connected with the first down-conversion module, the intermediate frequency processing module is connected with a first baseband filter, and the first baseband filter is connected with the first transmission modulation module.
Preferably, in the radio frequency channel for ground communication: the duplexer, the second low-noise amplifier module, the second radio frequency filter, the second down-conversion module, the third intermediate frequency filter, the second amplifier/AGC module, the fourth amplifier module, the fourth intermediate frequency filter, the intermediate frequency processing module, the second reference filter, the fifth amplifier module, the second local oscillator module, the second power divider, the sixth amplifier module, the second transmit modulation module, the second transmit filter and the power amplifier module are sequentially connected, the second power divider is connected with the second down-conversion module, the power amplifier module is connected with the duplexer, the second baseband filter is respectively connected with the intermediate frequency processing module and the second transmit modulation module, and the third baseband filter is respectively connected with the intermediate frequency processing module and the second transmit modulation module.
Preferably, the intermediate frequency processing module comprises a baseband processing FPGA, a monitoring FPGA, an a/D conversion circuit, a D/a conversion circuit and an interface circuit, and the baseband processing FPGA is used for rapid capture of ground measurement and control and relay measurement and control and channel signal processing; the monitoring FPGA is used for monitoring the working state of the baseband processing FPGA and refreshing key parameters in real time; the A/D conversion circuit is used for carrying out A/D conversion on the intermediate frequency signal from the radio frequency transceiving module and sending the generated digital signal to the baseband processing FPGA; the D/A conversion circuit is used for performing D/A conversion on the digital signal from the baseband processing FPGA and sending the generated intermediate frequency signal to the radio frequency transceiving module; the interface circuit is used for transmitting and receiving remote control and remote measuring signals with the integrated electronic module.
Preferably, the radio frequency transceiver module, the intermediate frequency processing module and the secondary power supply module are all general hardware modules.
Preferably, the duplexer and the relay receiving filter are externally hung on the responder box body.
Compared with the prior art, the invention has the beneficial effects that:
the goods shelf type satellite-borne transponder has the characteristics of universalization, integration, miniaturization and light weight, and realizes the functions of ground measurement and control and relay measurement and control by adopting the forms of double receiving channels, double transmitting channels and a shared digital baseband;
aiming at the requirements of satellites of different models, the goods shelf type satellite-borne transponder adopts a uniform hardware platform, changes different software configurations, and replaces a duplexer and a relay receiving filter with different filtering frequency points, thereby achieving the purpose of universal design;
the design method of the invention can be applied to the design and development of aerospace type single-machine products of the same type, not only can effectively shorten the design and development period of the transponder product, but also can reduce the design and development cost of the transponder product.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
FIG. 1 is a block diagram of a shelf-type satellite-borne transponder according to an embodiment of the present invention;
fig. 2 is a frequency flow diagram of an rf transceiver module according to an embodiment of the invention;
FIG. 3 is a block diagram of an intermediate frequency processing module according to an embodiment of the present invention;
FIG. 4 is a block diagram of a secondary power module according to an embodiment of the invention;
figure 5 is a diagram of the overall dimensions of a duplexer in accordance with one embodiment of the present invention;
fig. 6 is a diagram of the overall dimensions of a relay receive filter according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, a shelf-type satellite-borne transponder includes:
the radio frequency transceiving module is used for receiving and transmitting the relay radio frequency signal to the ground;
the intermediate frequency processing module is used for receiving the A/D conversion of signals, the D/A conversion of reference signals, the capturing and tracking of pseudo codes and carriers and the processing of channel signals;
the secondary power supply module is used for power supply filtering, voltage conversion and transponder switch execution;
the duplexer is used for filtering ground measurement and control radio frequency receiving signals and radio frequency transmitting signals;
and the relay receiving filter is used for preselecting and filtering the relay measurement and control radio frequency receiving signal.
As shown in fig. 2, the radio frequency transceiver module adopts a superheterodyne frequency conversion design, and includes a relay communication radio frequency channel and a ground communication radio frequency channel, both of which are connected to the intermediate frequency processing module.
In the relay communication radio frequency channel: the first baseband filter is connected with the first emission modulation module, the first power divider is connected with the first down-conversion module, the intermediate frequency processing module is connected with the first baseband filter, and the first baseband filter is connected with the first emission modulation module.
In the ground communication radio frequency channel: the duplexer, the module is put to the second low noise, the second radio frequency filter, the second down conversion module, the third intermediate frequency filter, second amplification/AGC module, the fourth amplification module, the fourth intermediate frequency filter, the intermediate frequency processing module, the second reference filter, the fifth amplification module, the second local oscillator module, the second merit divides the ware, the sixth amplification module, the second transmission modulation module, second transmission filter and power amplifier module connect gradually, and the second merit divides the ware to be connected with the second down conversion module, the power amplifier module is connected with the duplexer, the second baseband filter is connected with intermediate frequency processing module and second transmission modulation module respectively, the third baseband filter is connected with intermediate frequency processing module and second transmission modulation module respectively.
Wherein the local oscillator reference signal f0And f0The frequency-locked loop is generated by an intermediate frequency processing module, and a phase-locked frequency synthesizer performs frequency multiplication on a local oscillation reference signal to generate local oscillation frequencies of a receiving branch and a transmitting branch.
The goods shelf type satellite-borne transponder uses the same temperature compensation crystal oscillator as the only frequency reference, outputs the frequency reference to the intermediate frequency processing module, is a stable sine signal and serves as a working clock of the FPGA chip, the ADC and the DDS processor. Setting configuration parameters, and outputting 2 local oscillation reference frequencies f through 2 paths of DAC processors0And f0‘，f0Using the RF module to carry out phase-locking frequency multiplication on the frequency references of up going and down going to ground0The to-relay radio frequency module is used as a forward frequency reference and a backward frequency reference to carry out phase-locking frequency multiplication processing.
As shown in fig. 3, the intermediate frequency processing module includes a baseband processing FPGA, a monitoring FPGA, an a/D conversion circuit, a D/a conversion circuit, and an interface circuit, where the baseband processing FPGA is used for fast capturing and channel signal processing of ground measurement and control and relay measurement and control; the monitoring FPGA is used for finishing monitoring of the working state of the baseband processing FPGA and real-time refreshing processing of key parameters; the A/D conversion circuit is used for carrying out A/D conversion on the intermediate frequency signal from the radio frequency transceiving module and sending the generated digital signal to the baseband processing FPGA; the D/A conversion circuit is used for carrying out D/A conversion on the digital signals from the baseband processing FPGA and sending the generated intermediate frequency signals to the radio frequency transceiving module; the interface circuit is used for transmitting and receiving remote control and remote measuring signals with the integrated electronic module.
As shown in fig. 4, the secondary power supply module includes a fuse, an EMI filter, a relay switch, and a DC/DC conversion module, and mainly performs functions of power supply filtering, voltage conversion, and transponder switching.
As shown in fig. 5, which is a diagram of the overall dimension of the shelf-type transponder duplexer of the present invention, the duplexer is disposed outside the transponder cavity, and has a function of transmitting and receiving, and performs the function of filtering the ground measurement and control radio frequency receiving signal and the ground measurement and control radio frequency transmitting signal of the transponder radio frequency transceiver module.
As shown in fig. 6, the outline dimension of the relay receiving filter of the shelf-type satellite-borne transponder according to the present invention is shown, and the relay receiving filter is also disposed outside the transponder cavity, so as to implement the function of preselecting and filtering the relay measurement and control radio frequency receiving signal of the transponder radio frequency transceiver module.
The duplexer and the relay receiving filter are externally hung on the box body of the responder, and can be replaced according to different frequency point requirements of satellites of various models, so that the duplexer and the relay receiving filter have corresponding filtering frequency points to meet the requirements of the satellites of different models.
The working principle of the goods-shelf type satellite-borne transponder is as follows:
when the responder works, the primary power supply generates various working power supplies required by the radio frequency transceiving module and the intermediate frequency processing module through the secondary power supply module. Meanwhile, as an instruction interface, the secondary power supply module receives an instruction and completes corresponding electrical interface conversion.
After the device is powered on, the temperature compensation crystal oscillator in the radio frequency transceiver module outputs to the intermediate frequency processing module, and provides a high-stability reference clock for the intermediate frequency processing module to serve as a working clock of the baseband processing chip and the ADC. The intermediate frequency processing module generates reference frequency to the radio frequency transceiving module through the DDS, and generates a receiving branch local oscillation signal and a transmitting branch carrier signal after phase locking and frequency doubling.
The receiving antenna receives the uplink remote control signal and the uplink ranging signal (to the ground), transmits the uplink remote control signal and the uplink ranging signal to a radio frequency channel receiving branch circuit through a high-frequency feeder line, and outputs an analog intermediate frequency signal to an intermediate frequency processing module after filtering, amplifying and down-conversion processing.
Under the control of a sampling clock provided by the radio frequency transceiving module, an ADC module of the intermediate frequency processing module collects an analog intermediate frequency receiving signal and outputs a digital intermediate frequency signal to a baseband processing chip. The carrier and pseudo code acquisition and tracking is then performed on the signals (to ground) containing the remote control and uplink ranging signals. After the tracking and locking of the remote control signal carrier, the pseudo code and the data bit are finished, the data bit synchronous pulse is extracted, the data demodulation is finished, and the demodulated data and the same bit synchronous pulse are transmitted to the comprehensive electron through a differential RS422 standard interface. And sampling the tracking locking state and the channel processing result of the uplink ranging signal by using the falling edge of the downlink ranging frame synchronization pulse to acquire the loop locking state, the carrier Doppler frequency, the data bit count, the number of pseudo code cycles, the pseudo code phase, the pseudo code CHIP phase, the integral number of carriers, the carrier phase and the signal-to-noise ratio of the uplink ranging signal. And framing the information according to a certain format to form a downlink ranging frame, and outputting the downlink ranging frame to a radio frequency channel transmitting branch after spreading. And receiving the telemetering information input by the integrated electronic subsystem, and outputting the telemetering information to the radio frequency channel transmitting branch after spreading.
The radio frequency channel transmitting branch receives the baseband ranging spread spectrum signal and the baseband telemetering spread spectrum signal provided by the intermediate frequency processing module, BPSK modulation is carried out on the local oscillator signal generated by the local oscillator branch, direct up-conversion is carried out to radio frequency, and the modulation signal is sent to a transmitting antenna after being filtered and amplified.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (4)
1. A shelf-based space-borne transponder, comprising:
the radio frequency transceiving module is used for receiving and transmitting the relay radio frequency signal to the ground;
the intermediate frequency processing module comprises a baseband processing FPGA, a first A/D conversion circuit, a second A/D conversion circuit, a first D/A conversion circuit and a second D/A conversion circuit, wherein the first A/D conversion circuit and the second A/D conversion circuit are respectively used for carrying out A/D conversion on a ground-to-ground and a relay intermediate frequency signal from the radio frequency transceiving module and sending the generated ground-to-ground and relay digital signals to the baseband processing FPGA, the first D/A conversion circuit and the second D/A conversion circuit are respectively used for carrying out D/A conversion on the ground-to-ground and relay digital signals from the baseband processing FPGA and sending the generated ground-to-ground and relay intermediate frequency signals to the radio frequency transceiving module, and the baseband processing FPGA is used for capturing, tracking and tracking pseudo codes and carriers, Processing channel signals;
the secondary power supply module is used for power supply filtering, voltage conversion and transponder switch execution;
the duplexer is arranged outside the shelf type satellite-borne transponder box body, has a receiving and transmitting integrated function and is used for filtering ground measurement and control radio frequency receiving signals and radio frequency transmitting signals;
the relay receiving filter is arranged outside the box body of the goods-shelf type satellite-borne transponder and is used for preselecting and filtering a relay measurement and control radio frequency receiving signal;
the ground measurement and control channel and the relay measurement and control channel are arranged in the radio frequency transceiving module and the intermediate frequency processing module and are used for realizing information interaction between the radio frequency transceiving module and the intermediate frequency processing module and the outside;
the radio frequency transceiving module comprises a ground communication radio frequency channel and a relay communication radio frequency channel which are connected with the intermediate frequency processing module;
the radio frequency transceiving module, the intermediate frequency processing module and the secondary power supply module are all universal hardware modules, and the duplexer and the relay receiving filter are externally hung on a box body of the transponder and are replaced based on different frequency points of satellites with different models.
2. A shelf-based space-borne transponder according to claim 1, wherein said relay communication radio frequency channels are defined by: the wireless communication device comprises a relay receiving filter, a first low-noise amplifier module, a first radio frequency filter, a first down-conversion module, a first intermediate frequency filter, a first amplifier/AGC module, a first amplifier module, a second intermediate frequency filter, an intermediate frequency processing module, a first reference filter, a second amplifier module, a first local oscillator module, a first power divider, a third amplifier module, a first transmission modulation module and a first transmission filter which are sequentially connected, wherein the first power divider is connected with the first down-conversion module, the intermediate frequency processing module is connected with a first baseband filter, and the first baseband filter is connected with the first transmission modulation module.
3. A shelf-based space-borne transponder according to claim 1, wherein said ground communication radio frequency channels are defined by: the duplexer, the second low-noise amplifier module, the second radio frequency filter, the second down-conversion module, the third intermediate frequency filter, the second amplifier/AGC module, the fourth amplifier module, the fourth intermediate frequency filter, the intermediate frequency processing module, the second reference filter, the fifth amplifier module, the second local oscillator module, the second power divider, the sixth amplifier module, the second transmit modulation module, the second transmit filter and the power amplifier module are sequentially connected, the second power divider is connected with the second down-conversion module, the power amplifier module is connected with the duplexer, the second baseband filter is respectively connected with the intermediate frequency processing module and the second transmit modulation module, and the third baseband filter is respectively connected with the intermediate frequency processing module and the second transmit modulation module.
4. The shelf type space-borne transponder according to claim 1, wherein the intermediate frequency processing module comprises the baseband processing FPGA, a monitoring FPGA, the first a/D conversion circuit, the second a/D conversion circuit, the first D/a conversion circuit, the second D/a conversion circuit and an interface circuit, and the baseband processing FPGA is used for fast capturing and channel signal processing of ground measurement and control, relay measurement and control; the monitoring FPGA is used for monitoring the working state of the baseband processing FPGA and refreshing key parameters in real time; the first A/D conversion circuit is used for carrying out A/D conversion on the ground intermediate frequency signal from the radio frequency transceiving module and sending a generated first digital signal to the baseband processing FPGA; the second A/D conversion circuit is used for carrying out A/D conversion on the intermediate frequency signal from the radio frequency transceiving module and sending a generated second digital signal to the baseband processing FPGA; the first D/A conversion circuit is used for performing D/A conversion on a first digital signal from the baseband processing FPGA and sending a generated ground intermediate frequency signal to the radio frequency transceiving module; the second D/A conversion circuit is used for performing D/A conversion on a second digital signal from the baseband processing FPGA and sending the generated intermediate frequency signal to the radio frequency transceiver module; the interface circuit is used for transmitting and receiving remote control and remote measuring signals with the integrated electronic module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810307538.5A CN108199766B (en) | 2018-04-08 | 2018-04-08 | Goods shelf type satellite-borne transponder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810307538.5A CN108199766B (en) | 2018-04-08 | 2018-04-08 | Goods shelf type satellite-borne transponder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108199766A CN108199766A (en) | 2018-06-22 |
| CN108199766B true CN108199766B (en) | 2021-11-26 |
Family
ID=62596441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810307538.5A Active CN108199766B (en) | 2018-04-08 | 2018-04-08 | Goods shelf type satellite-borne transponder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108199766B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108988931B (en) * | 2018-06-26 | 2020-10-09 | 上海卫星工程研究所 | Satellite measurement and control coprocessor |
| CN109765527B (en) * | 2018-12-11 | 2021-03-19 | 中国人民解放军63921部队 | S-band multi-channel high-precision aerospace ranging responder |
| CN110266349B (en) * | 2019-07-11 | 2022-02-18 | 上海航天测控通信研究所 | Small-size universalization dual-frenquency continuous wave answering machine |
| CN110808770B (en) * | 2019-09-25 | 2022-05-24 | 西安空间无线电技术研究所 | Integrated measurement and control terminal |
| CN111431581A (en) * | 2020-03-27 | 2020-07-17 | 上海航天测控通信研究所 | Radio frequency receiving and transmitting satellite-borne device based on anti-radiation microwave integrated circuit |
| CN111478726B (en) * | 2020-05-27 | 2022-06-03 | 中国科学院微小卫星创新研究院 | Communication system for small communication satellite |
| CN114710192B (en) * | 2022-03-11 | 2023-11-17 | 中国科学院国家空间科学中心 | Satellite-borne space-sea relay communication system and method applied to low-orbit satellite |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006229510A (en) * | 2005-02-17 | 2006-08-31 | Sharp Corp | Digital satellite broadcasting system, transmitting station, and receiver |
| CN106253966A (en) * | 2016-07-28 | 2016-12-21 | 西安空间无线电技术研究所 | A kind of spaceborne reconfigurable TT&C Transponder of S and X band link |
| CN106341177A (en) * | 2016-08-12 | 2017-01-18 | 上海卫星工程研究所 | Data transmission system between noncontact double super satellite cabins and operation method thereof |
| CN107888278A (en) * | 2017-11-21 | 2018-04-06 | 中国电子科技集团公司第五十四研究所 | A kind of small-sized spaceborne Digital transponder terminal platform of generalization |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8347340B2 (en) * | 2008-09-11 | 2013-01-01 | Livetv, Llc | Aircraft communications system with video file library and associated methods |
| CN102795246B (en) * | 2012-07-27 | 2016-01-20 | 北京交大思诺科技股份有限公司 | A kind of high safe LEU and improve the method for its fail safe |
| CN103490808B (en) * | 2013-08-12 | 2016-06-22 | 上海卫星工程研究所 | Spaceborne S frequency range trunk subscriber terminal system and application process based on spread spectrum system |
-
2018
- 2018-04-08 CN CN201810307538.5A patent/CN108199766B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006229510A (en) * | 2005-02-17 | 2006-08-31 | Sharp Corp | Digital satellite broadcasting system, transmitting station, and receiver |
| CN106253966A (en) * | 2016-07-28 | 2016-12-21 | 西安空间无线电技术研究所 | A kind of spaceborne reconfigurable TT&C Transponder of S and X band link |
| CN106341177A (en) * | 2016-08-12 | 2017-01-18 | 上海卫星工程研究所 | Data transmission system between noncontact double super satellite cabins and operation method thereof |
| CN107888278A (en) * | 2017-11-21 | 2018-04-06 | 中国电子科技集团公司第五十四研究所 | A kind of small-sized spaceborne Digital transponder terminal platform of generalization |
Non-Patent Citations (1)
| Title |
|---|
| 一种新型TDRSS用户应答机中频数字接收机的设计;周德富;《中国优秀硕士学位论文全文数据库 信息科技辑》;20040229;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108199766A (en) | 2018-06-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108199766B (en) | Goods shelf type satellite-borne transponder | |
| US10742261B2 (en) | Energy efficient ultra-wideband impulse radio systems and methods | |
| Salazar et al. | 13.5 A− 97dBm-sensitivity interferer-resilient 2.4 GHz wake-up receiver using dual-IF multi-N-Path architecture in 65nm CMOS | |
| Moncunill-Geniz et al. | An 11-Mb/s 2.1-mW synchronous superregenerative receiver at 2.4 GHz | |
| CN102752038B (en) | Satellite responder | |
| CN104467908B (en) | X frequency range air-ground transmission broadband transceiver | |
| CN216490493U (en) | Satellite measurement and control satellite affair integrated system | |
| US7321754B2 (en) | Radio-frequency signal frequency conversion device for a low power RF receiver | |
| CN103166670A (en) | Radio frequency transceiver of Beidou satellite navigation and positioning system | |
| CN109495118A (en) | A kind of spaceborne S frequency range Spread Spectrum TT&C answering system based on ASIC framework | |
| CN104092478A (en) | Satellite-borne X-frequency-band double-channel multifunctional responder | |
| CN103067326B (en) | A kind of remote measurement passes integrated transmitter with number | |
| Thanh et al. | A 100-μW wake-up receiver for UHF transceiver | |
| CN211606529U (en) | Miniaturized high-sensitivity frequency spectrum monitoring receiver | |
| Lee et al. | 30.2 NB-IoT and GNSS all-in-one system-on-chip integrating RF transceiver, 23dBm CMOS power amplifier, power management unit and clock management system for low-cost solution | |
| CN115842561A (en) | High-integration multifunctional channel system | |
| CN202182944U (en) | Compatible reception module for satellite navigation | |
| CN206490670U (en) | Triple channel Ka frequency range spread-spectrum signal integrated equipment for wastewater treatment | |
| CN105699989B (en) | Method and terminal for compensating Doppler frequency of Beidou RDSS terminal | |
| CN113556146B (en) | Measurement and control transponder and measurement and control response system loaded on controlled satellite | |
| CN214205517U (en) | Intermediate frequency-based multichannel digital TR assembly | |
| CN212588319U (en) | Universal broadband low-phase-noise agile frequency conversion source for active millimeter wave imaging system | |
| CN212850500U (en) | Miniaturized anti-interference radio frequency receiving circuit module | |
| JPH071868Y2 (en) | Space station transceiver | |
| CN203167175U (en) | DMR interphone based on RDA1846S as radio-frequency circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 201109 No. 1777 Chunchun Road, Minhang District, Shanghai Applicant after: SHANGHAI SPACEFLIGHT INSTITUTE OF TT&C AND TELECOMMUNICATION Address before: No. 881 Tianbao Road, Xingang Street, Hongkou District, Shanghai 200080 Applicant before: SHANGHAI SPACEFLIGHT INSTITUTE OF TT&C AND TELECOMMUNICATION |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |