CN203037853U - TDMA-based pulse pseudo-satellite transmitter - Google Patents
TDMA-based pulse pseudo-satellite transmitter Download PDFInfo
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- CN203037853U CN203037853U CN 201220692492 CN201220692492U CN203037853U CN 203037853 U CN203037853 U CN 203037853U CN 201220692492 CN201220692492 CN 201220692492 CN 201220692492 U CN201220692492 U CN 201220692492U CN 203037853 U CN203037853 U CN 203037853U
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- satellite
- pseudolite
- pseudo
- pulse
- signal
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Abstract
The utility model relates to a TDMA-based pulse pseudo-satellite transmitter consisting of a pseudo-satellite, an antenna, a high-speed pulse switch device, a pulse control microprocessor and a power amplifier, wherein the pseudo-satellite is simultaneously connected with the power amplifier and the pulse control microprocessor, the high-speed pulse switch device is provided with two input interfaces respectively connected with the power amplifier and the pulse control microprocessor, the antenna is connected with the high-speed pulse switch device, the pseudo-satellite provides navigation positioning signals, the antenna emits and outputs the navigation signals and is controlled by the high-speed pulse switch device, and the pulse control microprocessor controls motion of the high-speed pulse switch device and completes pseudo-satellite state verification. Under a state of normal operation of the pseudo-satellite, square signals of 7% duty ratio are generated and transmitted to the high-speed pulse switch device. Compared with traditional emitters, the pseudo-satellite transmitter provided by the utility model has the characteristics of simple structure, small interference and high precision.
Description
Technical field
The utility model relates to a kind of pulse pseudo satellite, pseudolite transmitter, particularly a kind of pulse pseudo satellite, pseudolite transmitter based on tdma.
Background technology
Pseudo satellite, pseudolite signal transponder pulse power usually can be very strong so that can cause exceeding the dynamic range of receiver; receiver is because certain strong signal and when saturated; more weak satellite-signal and noise will disappear at the output terminal of correlator; therefore pseudo satellite, pseudolite can disturb the normal reception of satellite in orbit signal when the emission of navigation pulse signal; when owing to the pseudo satellite, pseudolite pulse enable signal saturation of receiver, can cause satellite-signal to get clogged fully.When design pseudo satellite, pseudolite pulse signal radiation pattern, must the careful saturated influence for pseudo satellite, pseudolite signal and satellite-signal of consideration pulse.
The power ratio that satellite navigation signals arrives subscriber equipment is lower, is subjected to the interference of pseudo satellite, pseudolite easily, and the anti-interference problem of satellite navigation signals is a key issue of pseudo satellite, pseudolite navigation field.The same with other communication systems, satellite navigation signals mainly contains time domain, spatial domain and three kinds of anti-interference methods of frequency domain, and these three kinds of methods all need computing and the complicated hardware equipment of being correlated with.Pseudolite systems adopts the pulse signal hidden technology to reduce interference to the satellite in orbit signal more, this design philosophy is exactly the satellite in orbit signal correction device of closing receiver at the pseudo satellite, pseudolite impulse duration, correlator is not worked, and the interference of pseudo satellite, pseudolite signal just can not enter the receiving cable of satellite in orbit signal.Blanking signal need obtain by the saturated monitor in receiver RF circuit.After the emission of pseudo satellite, pseudolite pulse signal was finished, blanking signal disappeared, and receiver satellite in orbit signal correction device is opened, and receiver is received in the rail satellite-signal.
Mainly there is the problem of following several respects in traditional pulse signal blanking at present:
1. the pseudo satellite, pseudolite pulse need be closed receiver satellite in orbit signal correction device launch time;
2. RF equipment need have passage saturation detection ability, and provides the noise reduction signal to blanking circuit;
3. the break-make that needs blanking circuit control receiver satellite-signal passage;
4. pulse is very short launch time, is generally the nanosecond order of magnitude, and therefore the sensitivity to blanking circuit requires very high;
5. blanking circuit needs to work reliably repeatedly, need have very high frequency response characteristic.
Summary of the invention
The utility model provides a kind of a kind of pulse pseudo satellite, pseudolite transmitter based on tdma that can receive pseudo satellite, pseudolite signal and satellite in orbit signal simultaneously that has for the technical matters that solves above-mentioned prior art existence.
The technical solution of the utility model is as follows: a kind of pulse pseudo satellite, pseudolite transmitter based on tdma, by pseudo satellite, pseudolite, antenna, the high-speed pulse switching device, pulse control microprocessor and power amplifier are formed, pseudo satellite, pseudolite is connected with pulse control microprocessor with power amplifier simultaneously, the high-speed pulse switching device has two input interfaces, be connected with pulse control microprocessor with power amplifier respectively, antenna is connected with the high-speed pulse switching device, pseudo satellite, pseudolite provides the navigator fix signal, antenna emission output navigation signal, antenna is controlled by the high-speed pulse switching device, the action of pulse control microprocessor control high-speed pulse switching device, pulse control microprocessor is finished the pseudo satellite, pseudolite state verification, under pseudo satellite, pseudolite state working properly, produce the square-wave signal of 7% dutycycle, be delivered to the high-speed pulse switching device.
The utlity model has following characteristics:
1. receiver receives pseudo satellite, pseudolite and satellite in orbit signal simultaneously;
2. adopt time division multiplexing mode emission pseudo satellite, pseudolite pulse signal;
3. pulse control microprocessor produces square-wave pulse signal;
4. pseudo satellite, pseudolite pulse signal emission dutycycle is 7%;
5. the signal interference ratio of receiver (S/I) is not less than 6dB.
The beneficial effects of the utility model are:
1, the utility model is 7% square-wave pulse signal by pulse control microprocessor generation dutycycle, burst length 7% is high level, the conducting of high-speed pulse switching device, the transmission navigation signal is to antenna, the navigation terminal user can receive the navigation signal of pseudo satellite, pseudolite, carry out navigator fix, the pseudo satellite, pseudolite emitting antenna is not launched any signal beyond the burst length, has avoided crossing strong interfered with terminal user to the reception of satellite in orbit because of the pseudo satellite, pseudolite navigation signal.
2,7% pulse duty factor of the utility model technical requirement is less than 10% dutycycle of RTCM-104 council suggestion use.Pseudo satellite, pseudolite is only just understood interference receiver and is followed the tracks of the satellite in orbit signal when the transponder pulse signal, thus in each cycle, have only in time of 7% can interference receiver to the reception of satellite-signal.In this case, existing most receiver can be followed the tracks of pseudo satellite, pseudolite signal and satellite in orbit signal simultaneously.At pseudo satellite, pseudolite pulse signal launching phase, limited to the interference time of satellite in orbit signal, can not produce big interference to catching of satellite in orbit signal, can not cause the long passage of receiver saturated and cause receiver to the satellite-signal losing lock.
3, pseudo satellite, pseudolite pulse signal emission dutycycle is controlled to be 7% technology and can reduces the satellite navigation terminal receiver to the needs of pseudo satellite, pseudolite pulse signal satellite channel blanking in launch time.7% dutycycle can realize the reliable reception of civilian pseudo satellite, pseudolite navigation signal frequency range, improved the reliability that satellite in orbit signal when many pseudo satellite, pseudolites are worked simultaneously receives simultaneously, made the pseudo satellite, pseudolite increase in the patient 20% pseudo satellite, pseudolite pulse signal duty cycle range of receiver institute.
4, receiver does not need to increase the blanking circuit to the satellite-signal receiving cable, the common receiver that most of S/I are not less than 6dB can be realized simultaneously the reception to pseudo satellite, pseudolite and satellite in orbit signal, use is no more than three the accurate location of the auxiliary satellite in orbit realization of pseudo satellite, pseudolite, the highest precision that can reach centimetre-sized of bearing accuracy of process pseudo satellite, pseudolite auxiliary positioning usually.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples:
A kind of pulse pseudo satellite, pseudolite transmitter based on tdma, by pseudo satellite, pseudolite 1, antenna 2, high-speed pulse switching device 3, pulse control microprocessor 4 and power amplifier 5 are formed, pseudo satellite, pseudolite 1 is connected with pulse control microprocessor 4 with power amplifier 5 simultaneously, high-speed pulse switching device 3 has two input interfaces, be connected with pulse control microprocessor 4 with power amplifier 5 respectively, antenna 2 is connected with high-speed pulse switching device 3, pseudo satellite, pseudolite 1 provides the navigator fix signal, antenna 2 emission output navigation signals, antenna 2 is subjected to 3 controls of high-speed pulse switching device, the action of pulse control microprocessor 4 control high-speed pulse switching devices 3, pulse control microprocessor 4 is finished pseudo satellite, pseudolite 1 state verification, under pseudo satellite, pseudolite 1 state working properly, produce the square-wave signal of 7% dutycycle, be delivered to high-speed pulse switching device 3.
It is synchronous that pulse pseudo satellite, pseudolite transmitter carries out clock by pulse control microprocessor 4 and pseudo satellite, pseudolite 1, guarantees signal period initial synchronous of initial and the pseudo satellite, pseudolite 1 of pulse signal.Pulse control microprocessor 4 detects the duty of pseudo satellite, pseudolites 1, under pseudo satellite, pseudolite 1 state working properly, produces a dutycycle and be 7% square-wave pulse, is high level in the recurrence interval, is low level in At All Other Times.By the break-make of pulse signal control high-speed pulse switching device 3, in high level time, 3 conductings of high-speed pulse switching device, the navigation signal of pseudo satellite, pseudolite 1 is through delivering to antenna 2 emissions behind the power amplifier 5.Outside cycle, high-speed pulse switching device 3 disconnects, and does not carry any signal to antenna 2 in pulse high level.
At satellite-signal in the cycle, pulse control microprocessor 4 gives pseudo satellite, pseudolite 1 one time slots of specifying 7% dutycycle by high-speed pulse switching device 3, pseudo satellite, pseudolite 1 sends navigation message with same carrier frequency to subscriber equipment in this time slot, different pseudo satellite, pseudolites 1 enters the time slot difference in satellite-signal cycle, and these navigation message signals are lined up according to time sequencing and constituted the pseudo satellite, pseudolite navigation message.
Pulse pseudo satellite, pseudolite transmitter is finished navigation signal time division multiplex mechanism by different time-gap control high-speed pulse switching device 3, does not influence terminal device when making pseudo satellite, pseudolite 1 operate as normal and is received in the rail satellite-signal.
Claims (1)
1. pulse pseudo satellite, pseudolite transmitter based on tdma, by pseudo satellite, pseudolite, antenna, the high-speed pulse switching device, pulse control microprocessor and power amplifier are formed, it is characterized in that: described pseudo satellite, pseudolite is connected with pulse control microprocessor with power amplifier simultaneously, the high-speed pulse switching device has two input interfaces, be connected with pulse control microprocessor with power amplifier respectively, antenna is connected with the high-speed pulse switching device, pseudo satellite, pseudolite provides the navigator fix signal, antenna emission output navigation signal, antenna is controlled by the high-speed pulse switching device, the action of pulse control microprocessor control high-speed pulse switching device, pulse control microprocessor is finished the pseudo satellite, pseudolite state verification, under pseudo satellite, pseudolite state working properly, produce the square-wave signal of 7% dutycycle, be delivered to the high-speed pulse switching device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220692492 CN203037853U (en) | 2012-12-15 | 2012-12-15 | TDMA-based pulse pseudo-satellite transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220692492 CN203037853U (en) | 2012-12-15 | 2012-12-15 | TDMA-based pulse pseudo-satellite transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203037853U true CN203037853U (en) | 2013-07-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220692492 Expired - Fee Related CN203037853U (en) | 2012-12-15 | 2012-12-15 | TDMA-based pulse pseudo-satellite transmitter |
Country Status (1)
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| CN (1) | CN203037853U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104133221A (en) * | 2014-07-24 | 2014-11-05 | 中国人民解放军信息工程大学 | Pseudolite positioning system based on universal receiver |
| CN105204039A (en) * | 2015-09-14 | 2015-12-30 | 武汉理工大学 | Method for calculating duty ratio of Beidou pesudolite |
| CN108141275A (en) * | 2015-09-15 | 2018-06-08 | 高通股份有限公司 | For the power control scheme based on duty ratio of satellite communication |
| CN113328792A (en) * | 2021-07-06 | 2021-08-31 | 南京中网卫星通信股份有限公司 | Satellite networking system, networking method and communication method |
-
2012
- 2012-12-15 CN CN 201220692492 patent/CN203037853U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104133221A (en) * | 2014-07-24 | 2014-11-05 | 中国人民解放军信息工程大学 | Pseudolite positioning system based on universal receiver |
| CN105204039A (en) * | 2015-09-14 | 2015-12-30 | 武汉理工大学 | Method for calculating duty ratio of Beidou pesudolite |
| CN108141275A (en) * | 2015-09-15 | 2018-06-08 | 高通股份有限公司 | For the power control scheme based on duty ratio of satellite communication |
| CN113328792A (en) * | 2021-07-06 | 2021-08-31 | 南京中网卫星通信股份有限公司 | Satellite networking system, networking method and communication method |
| CN113328792B (en) * | 2021-07-06 | 2023-09-29 | 南京中网卫星通信股份有限公司 | Satellite networking system, networking method and communication method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130703 Termination date: 20131215 |