CN116865818A - Wireless burst data transmission relay device - Google Patents
Wireless burst data transmission relay device Download PDFInfo
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- CN116865818A CN116865818A CN202310949807.9A CN202310949807A CN116865818A CN 116865818 A CN116865818 A CN 116865818A CN 202310949807 A CN202310949807 A CN 202310949807A CN 116865818 A CN116865818 A CN 116865818A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 28
- 238000006243 chemical reaction Methods 0.000 claims abstract description 44
- 230000006854 communication Effects 0.000 claims abstract description 26
- 238000004891 communication Methods 0.000 claims abstract description 25
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 10
- 230000000712 assembly Effects 0.000 claims abstract description 3
- 238000000429 assembly Methods 0.000 claims abstract description 3
- 238000002955 isolation Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000000354 decomposition reaction Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000009432 framing Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
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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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing
Abstract
The invention discloses a wireless burst data transmission relay device, which belongs to the field of ultrashort wave wireless burst communication, and comprises a duplexer, an antenna and two groups of working units, wherein each working unit comprises a low intermediate frequency signal processor, a power amplifier control, digital-analog conversion, analog-digital conversion, delay adjustment and a receiving-transmitting assembly; wherein the receiving/transmitting frequency of one receiving and transmitting component is f 1 The receiving/transmitting frequency of the other receiving/transmitting component is f 2 The two receiving and transmitting assemblies adopt a time division duplex mode and work independently at the same time; the two output ends of the working mode are respectively connected with the first input ends of the low intermediate frequency signal processors of the corresponding working units; the isolating switches of the two working units are respectively connected with the first bidirectional port and the second bidirectional port of the duplexer, and the third bidirectional port of the duplexer is connected with the antenna. The relay forwarding of the invention does not change the radio frequencyThe forwarding processing steps are simple, the time delay is low, the influence of line-of-sight propagation obstacles or the earth curvature can be overcome, and the communication distance is prolonged.
Description
Technical Field
The invention relates to a data transmission relay method and a data transmission relay device in the field of ultra-short wave wireless burst communication, which can select a maneuvering or fixed mode according to the use environment and are suitable for popularization and application in the ultra-short wave wireless burst relay communication occasion.
Background
The ultra-short wave data transmission system has wide application field, relates to measurement and mapping data, digital voice and the like, and has more devices which can be accommodated in the ultra-short wave band and strong anti-interference capability compared with other bands.
Offshore ultrashort wave (VHF) mobile communication relies on direct waves. In some small ships where satellite communication systems cannot be installed due to space, cost, etc., when a shore station and a water surface mobile station or a water surface mobile station perform sea level wireless communication, in order to overcome line-of-sight propagation obstacles caused by islands (or moored ships) or the influence of the earth curvature on a communication link (an offshore communication blind area), the antenna erection height is often required to be reinforced. However, for some data communication with a long distance, the difficulty in engineering realization is high and the navigation safety of the ship is affected due to the fact that an excessively high antenna is erected to achieve the vision condition. And a communication relay mode is adopted, so that the antenna erection requirement is reduced, and the distance of data communication is prolonged.
When RTK measurement is carried out in a land outdoor environment (refer to figure 1), the ultrashort wave data transmission system completes bidirectional information transmission between the reference station and the peripheral station. When the outdoor shielding factor causes the link to be affected, the operation efficiency is reduced. The communication relay device is adopted, so that the influence of shielding factors can be overcome, the communication radius is prolonged, the transmission delay is less, the instantaneity is higher, and the mapping work efficiency can be effectively improved.
Disclosure of Invention
The invention aims to provide a wireless burst data transmission relay method and device, which solve the problem of an offshore communication blind area caused by the influence of an offshore line-of-sight propagation obstacle or earth curvature and are also suitable for ground communication application.
A wireless burst data transmission relay device selects a relay working mode or a non-relay working mode through a working mode; comprises a duplexer, an antenna and two groups of working units, each working unit comprises a low intermediate frequency signal processor, a power amplifier control, a digital-to-analog conversion, an analog-to-digital conversion, a delay adjustment and a receiving-transmitting assemblyThe method comprises the steps of carrying out a first treatment on the surface of the Wherein the receiving/transmitting frequency of one receiving and transmitting component is f 1 The receiving/transmitting frequency of the other receiving/transmitting component is f 2 The two receiving and transmitting assemblies adopt a time division duplex mode and work independently at the same time;
the two output ends of the working mode are respectively connected with the first input ends of the low intermediate frequency signal processors of the corresponding working units; the isolating switches of the two working units are respectively connected with the first bidirectional port and the second bidirectional port of the duplexer, and the third bidirectional port of the duplexer is connected with the antenna.
Further, the receiving and transmitting assembly comprises a down-conversion and AGC, a low noise amplifier, a limiter, a local oscillator, an isolating switch, an up-converter and a power amplifier;
the second input end of the low intermediate frequency signal processor is connected with the output end of the analog-to-digital conversion; the first output end of the low intermediate frequency signal processor is connected with the input end of the digital-analog conversion; the second output end of the low intermediate frequency signal processor is connected with the input end of the power amplifier control; the third output end of the low intermediate frequency signal processor is connected with the input end of the local oscillator;
the output end of the power amplifier control is respectively connected with the input end of the delay adjustment and the first input end of the isolating switch; the output end of the delay adjustment is connected with the first input end of the power amplifier; the output end of the digital-analog change is connected with the first input end of the up-converter; the input end of the analog-to-digital conversion is connected with the output end of the down-conversion and the AGC;
the down-conversion and AGC first input end is connected with the low-noise amplifier output end, the low-noise amplifier input end is connected with the limiter output end, the limiter input end is connected with the isolating switch output end, the isolating switch second input end is connected with the power amplifier output end, the power amplifier second input end is connected with the up-converter output end, the up-converter second input end is connected with the local oscillator first output end, and the local oscillator second output end is connected with the down-conversion and AGC second input end.
Further, when the two transceiver components perform the receiving/transmitting conversion, the delay amounts of the respective receiving/transmitting isolating switches are adjusted through corresponding delay adjustment, so that the transceiver components perform the same-frequency receiving/transmitting with enough isolation.
Further, at frequency f 1 Up receiving down burst information of base station, and in f 1 Broadcasting to one or more terminals on the frequency; at the same time at frequency f 2 Respectively receiving uplink burst information of one or more terminals, and at f 2 And transmitted over frequency to the base station.
Further, the forwarding frame of the relay device adopts two subframes, a protection gap is reserved between the two subframes, and the relay device uses the frequency f in the first subframe 1 Receiving downlink data of the base station and using the frequency f in the second subframe 1 And transmitting the data to one or more terminals.
Further, the forwarding frame of the relay device adopts two subframes, a protection gap is reserved between the two subframes, and the relay device uses the frequency f in the first subframe 2 Receiving uplink data of the terminal and transmitting the uplink data to the terminal in the second subframe at the frequency f 2 And transmitting the data to the base station.
Furthermore, in the non-relay working mode, when only one terminal is provided, the relay station and the relay station can directly perform FDD full duplex data communication; when there are multiple terminals, the relay station communicates with it in a point-to-multipoint TDMA mode.
Further, in the relay operation mode, the transceiver module a in the relay device completes the relay operation of the burst information sent by the base station, that is: at frequency f 1 The information sent by the base station is received, then sent to the terminal on the frequency, and the service information is re-framed in the process, so as to eliminate the receiving/sending interference and in-band noise;
the receiving and transmitting component B completes the relay action of the burst information sent by the terminal, namely: at frequency f 2 The information sent by the terminal is received, then sent to the base station on the frequency, and the service information is re-framed in the process, so as to eliminate the receiving/sending interference and in-band noise;
in the relay working mode, the relay device adopts FDD+TDD mode communication; when a plurality of terminals exist, the relay station and the plurality of terminals are communicated in a point-to-multipoint TDMA mode;
in a relay working mode, when a receiving and transmitting component A and a receiving and transmitting component B in the relay device work in a TDD mode, the time delay between two operations of opening a power amplifier and opening an isolating switch is adjusted by a low intermediate frequency signal processor to finish signal receiving/transmitting switching and realize same-frequency receiving/transmitting isolation at the same time; when the transceiver component A or the transceiver component B performs transmission/reception switching, the fast convergence and signal protection of the signal level from the non-arrival time to the time are completed by adopting a fast AGC circuit and the protection time of the frame head arranged in a low intermediate frequency signal processor, and burst signals are stably received;
in the relay working mode, when the relay device communicates with a plurality of terminals in a TDMA mode, the time delay between the relay device and the terminals is automatically adjusted; after the terminal obtains the communication delay between itself and the relay station, the time for the information frame to reach the relay station is automatically adjusted according to the delay value.
The beneficial effects of the invention are as follows:
the wireless burst data transmission relay method and the device are simple and feasible, and are suitable for relay forwarding of digital burst information in the field of ultrashort wave data transmission. The relay forwarding does not change the radio frequency, the forwarding processing steps are simple, the time delay is low, the influence of line-of-sight propagation obstacle or earth curvature can be overcome, and the communication distance is prolonged. The method has more application scenes when carrying out data transmission burst communication on the ground (or sea surface), and can be popularized and used.
Drawings
FIG. 1 is a schematic diagram of a system application scenario of the present invention;
FIG. 2 is a block diagram of the present wireless burst data relay device;
fig. 3 is a schematic diagram of the present relay device receiving base station information and forwarding the base station information downstream;
fig. 4 is a schematic diagram of the present relay device receiving terminal information and forwarding uplink;
fig. 5 is a schematic diagram of a subframe structure.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The wireless burst data transmission relay device comprises (see fig. 2): the device comprises an operating mode 1, low intermediate frequency signal processors 2 and 3, power amplifier controls 4 and 7, digital-to-analog conversion 5 and 8, analog-to-digital conversion 6 and 9, delay adjustment 17 and 25, a transceiver component A (comprising a down-conversion and AGC 10, a low noise amplifier 11, a limiter 12, a local oscillator 13, an isolating switch 14, an up-converter 15 and a power amplifier 16), a transceiver component B (comprising a down-conversion and AGC 18, a low noise amplifier 19, a limiter 20, a local oscillator 21, an isolating switch 22, an up-converter 23 and a power amplifier 24), a duplexer 26 and an antenna 27.
The working mode 1 outputs control signals to the low intermediate frequency signal processors 2 and 3, and the low intermediate frequency signal processors 2 and 3 open or close the isolating switches 14 and 22 through the power amplification controls 4 and 5, so that the working mode of the wireless burst data transmission relay device is set to be a relay mode or a non relay mode. The operating frequency range of the antenna 27 covers the operating frequency ranges of the transceiver component a and the transceiver component B.
In the "non-relay" mode, the local information code stream enters the low intermediate frequency signal processor 2 through the standard interface, framing, baseband shaping, low intermediate frequency modulation and the like are completed in the low intermediate frequency signal processor, then the local information code stream is output to the digital-to-analog conversion 5 to be converted into an analog signal, and then the analog signal is sent to the up-converter 15 to be multiplied by the local oscillator 13 to obtain a radio frequency signal f 1 By applying a radio frequency signal f 1 Amplified by the power amplifier 16, the amplified signal is passed through the isolation switch 14 to the diplexer 26, filtered and transmitted through the antenna 27. Simultaneously with the above process, the antenna 27 receives a weak radio frequency signal f from the air with a level amplitude varying continuously 2 The RF signal f 2 The signal is filtered by a duplexer 26 and then enters an isolating switch 22, then is output to a limiter 20, the output signal is amplified by a low noise amplifier 19, the signal is amplified to a certain amplitude, then enters a down-conversion and AGC 18 together with a local oscillator 21, finally, a low intermediate frequency signal with almost constant level amplitude is output to an analog-to-digital conversion 9, the digitized signal enters a low intermediate frequency signal processor 3 for two times of digital down-conversion and information demodulation/detection, and service information is obtained after frame decomposition.
In the "relay" mode, the signal relay flow will be described as being divided into up/down rows.
Signal downlink flow (base station & gt relay station & gt terminal)
As shown in fig. 2 and 3, the low intermediate frequency signal processor 2 normally sets the power amplifier control 4 to be in an "off" state, and at this time, the power amplifier 16 does not transmit a high power signal, and the receiving channel is opened. Traffic frame information (carrier f) sent by the base station 1 ) After passing through the wireless channel, the signal is filtered by the duplexer and then reaches the isolating switch 14, and then is output to the receiving channel of the receiving and transmitting component A, after being amplified to a certain amplitude by the limiter 12 and the low noise amplifier 11, enters the down-conversion and AGC 10 together with the local oscillator 13, the down-conversion and AGC 10 outputs a low intermediate frequency signal with almost constant level amplitude, and after being subjected to analog-to-digital conversion 6, the low intermediate frequency signal is transmitted to the low intermediate frequency signal processor 2 for digital down-conversion and information demodulation/detection, and the service information is obtained after frame decomposition. Then the low intermediate frequency signal processor 2 adds the received service code stream with a frame header (different from the base station service frame header), checks, etc. to re-frame, and prepares to transmit. Meanwhile, the power amplifier control 4 is set to be in an 'on' state, the isolating switch 14 closes the receiving channel after a small time delay, and opens the sending channel. Within the small time delay described above, the isolation switch 14 cannot achieve the required transmit/receive isolation. But the power amplifier 16 does not amplify the relayed signal due to the delay adjustment 17. The delay adjustment 17 is set to be greater than the slight delay described above. After the timing of the delay adjustment 17 is completed, the code stream after the re-framing is output to the digital-to-analog conversion 5 after the low intermediate frequency digital modulation, the analog signal output by the digital-to-analog conversion 5 and the local oscillator 13 enter the up-conversion 15, and the output frequency f 1 The signal is amplified by the power amplifier 16 and then sent to the isolating switch 14, at this time, the transmitting channel is in an on state, and the isolating switch 14 outputs a high-power signal to the duplexer 26 for filtering, and then the high-power signal is sent to the terminal through the antenna 27. After the relay forwarding signal is successfully sent, the low intermediate frequency signal processor 2 controls the signal to the power amplifier control 4 to turn off the power amplifier 16. The isolator 14 connects the diplexer 26 to the limiter 12 and the transceiver component a in turn resumes the channel state ready to receive the next burst of information from the base station.
(II) signal uplink flow (terminal & gt relay station & gt base station)
As shown in fig. 2 and 4, after one or more terminals (identity is identified in a frame structure) are started, the time delay of communication between the terminal and the relay station is set to 0. And then the delay identification signal is sent again, after the relay station receives the delay identification signal, the delay value between the delay identification signal and the relay station can be obtained, and then the value is sent to the terminal. When the terminal receives the time delay value, the initial time delay reaching the relay station is set according to the parameter and is used as the setting parameter when the service communication is formally carried out. Here, it is assumed that 3 terminals are provided, the delay between the terminal No. 2 and the relay station is minimum, the delay between the terminal No. 1 and the relay station is maximum, and the delay between the terminal No. 3 and the relay station is minimum. In the communication process, the relay station also measures the link delay change according to a certain frequency and notifies each terminal to correct. And each terminal forwards the service information in the uplink according to the sequence of reaching the relay station.
Take a certain terminal as an example. The low intermediate frequency signal processor 3 normally sets the power amplifier control 7 to be in an "off" state, and at this time, the power amplifier 24 does not transmit a high power signal, and the receiving channel is opened. Traffic frame information (carrier f) sent by the terminal 2 ) After passing through the wireless channel, the signal is filtered by the duplexer and then reaches the isolating switch 22, and then is output to the receiving channel of the receiving and transmitting component B because of unidirectional conduction, amplified to a certain amplitude by the amplitude limiter 20 and the low noise amplifier 19, enters the down-conversion and AGC 18 together with the local oscillator 21, and the down-conversion and AGC 18 outputs a low intermediate frequency signal with almost constant level amplitude, and then enters the low intermediate frequency signal processor 3 after being subjected to digital down-conversion and information demodulation/detection by the analog-to-digital conversion 9, and the service information is obtained after frame decomposition. Then the low intermediate frequency signal processor 3 adds the received service code stream with a frame header (different from the terminal service frame header), checks and the like to re-frame, and prepares to transmit. Meanwhile, the power amplifier control 7 is set to be in an 'on' state, the isolating switch 22 closes the receiving channel after a small time delay, and the sending channel is opened. Within the small time delay described above, the isolation switch 22 cannot achieve the required transmit/receive isolation. But the power amplifier 24 does not amplify the relayed signal due to the delay adjustment 25. The delay adjustment 25 is set to be greater than the slight delay described above. After the timing of the delay adjustment 25 is completed, the code stream after the re-framing is output to the digital-to-analog conversion 8 after the low intermediate frequency digital modulation, the analog signal output by the digital-to-analog conversion 8 and the local oscillator 21 enter the up-conversion 23, and the output frequency f 2 Is re-signaled by (2)Amplified by the power amplifier 24 and sent to the isolating switch 22, the transmitting channel is in an on state, the isolating switch 22 outputs a high-power signal to the duplexer 26 for filtering, and the high-power signal is sent to the base station through the antenna 27. After the relay forwarding signal is successfully transmitted, the low intermediate frequency signal processor 3 controls the signal to the power amplifier control 7 so as to turn off the power amplifier 24. The isolating switch 22 connects the diplexer 26 to the limiter 20, and the transceiver component B again returns to the channel state, ready to receive the next burst of information for the terminal.
The subframe structure is shown in fig. 5. The frame structure includes a preamble sequence and a data portion. The leader sequence consists of a short leader (SP) and a long Leader (LP). A Short Preamble (SP) is used to complete frame acquisition and carrier coarse estimation. The Long Preamble (LP) is used for symbol synchronization and carrier fine estimation. Frame capture is used to capture the arrival of a signal frame while determining the start symbol of the signal frame. The device completes frame capturing in two steps of coarse capturing and fine capturing, and improves capturing reliability. The arrival of the discovery signal frame is captured coarsely, the arrival of the acknowledgement signal frame is captured finely, and the starting position of the burst frame is located. The LP sequence completes a fine capture of the frame. The synchronization preamble sequence in the relay device downlink forwarding frame is different from the synchronization preamble sequence of the base station downlink subframe. Meanwhile, the synchronization preamble sequence in the uplink forwarding frame of the relay device is different from the synchronization preamble sequence of the uplink subframe of the terminal. This avoids interference with the receive link when the link switches to transmit (high power signal).
The frame header reserves AGC convergence protection time (the specific size is related to the parameters of the adopted automatic gain control circuit), so that a low intermediate frequency signal processor (2 or 3) can receive a digitized signal with stable amplitude when a receiving and transmitting component (A or B) works in a TDD mode and is switched between sending and receiving, and the synchronous and correct receiving of frame information is facilitated. And a protection time slot for receiving/transmitting switching is reserved at the end of the frame, and a delay adjustment module (17 or 25) is matched, so that a receiving and transmitting assembly (A or B) realizes receiving/transmitting isolation in a TDD mode, and the working performance is ensured.
Claims (8)
1. A wireless burst data transmission relay device selects a relay working mode or a non-relay working mode through a working mode; which is a kind ofThe device is characterized by comprising a duplexer, an antenna and two groups of working units, wherein each working unit comprises a low intermediate frequency signal processor, a power amplifier control, digital-to-analog conversion, analog-to-digital conversion, delay adjustment and a receiving and transmitting assembly; wherein the receiving/transmitting frequency of one receiving and transmitting component is f 1 The receiving/transmitting frequency of the other receiving/transmitting component is f 2 The two receiving and transmitting assemblies adopt a time division duplex mode and work independently at the same time;
the two output ends of the working mode are respectively connected with the first input ends of the low intermediate frequency signal processors of the corresponding working units; the isolating switches of the two working units are respectively connected with the first bidirectional port and the second bidirectional port of the duplexer, and the third bidirectional port of the duplexer is connected with the antenna.
2. The wireless burst data transmission relay device according to claim 1, wherein the transceiver component comprises a down-conversion and AGC, a low noise amplifier, a limiter, a local oscillator, an isolation switch, an up-converter and a power amplifier;
the second input end of the low intermediate frequency signal processor is connected with the output end of the analog-to-digital conversion; the first output end of the low intermediate frequency signal processor is connected with the input end of the digital-analog conversion; the second output end of the low intermediate frequency signal processor is connected with the input end of the power amplifier control; the third output end of the low intermediate frequency signal processor is connected with the input end of the local oscillator;
the output end of the power amplifier control is respectively connected with the input end of the delay adjustment and the first input end of the isolating switch; the output end of the delay adjustment is connected with the first input end of the power amplifier; the output end of the digital-analog change is connected with the first input end of the up-converter; the input end of the analog-to-digital conversion is connected with the output end of the down-conversion and the AGC;
the down-conversion and AGC first input end is connected with the low-noise amplifier output end, the low-noise amplifier input end is connected with the limiter output end, the limiter input end is connected with the isolating switch output end, the isolating switch second input end is connected with the power amplifier output end, the power amplifier second input end is connected with the up-converter output end, the up-converter second input end is connected with the local oscillator first output end, and the local oscillator second output end is connected with the down-conversion and AGC second input end.
3. The wireless burst data transmission relay device according to claim 1, wherein when the two transceiver modules perform the transmission/reception conversion, the delay amounts of the respective transmission/reception isolation switches are adjusted by corresponding delay adjustment, so that the transceiver modules perform the same-frequency transmission/reception with sufficient isolation.
4. The wireless burst data transfer relay device of claim 1 wherein at frequency f 1 Up receiving down burst information of base station, and in f 1 Broadcasting to one or more terminals on the frequency; at the same time at frequency f 2 Respectively receiving uplink burst information of one or more terminals, and at f 2 And transmitted over frequency to the base station.
5. The wireless burst data transmission relay device according to claim 1, wherein the relay device uses two subframes with a guard gap therebetween, and the relay device uses the frequency f in the first subframe 1 Receiving downlink data of the base station and using the frequency f in the second subframe 1 And transmitting the data to one or more terminals.
6. The wireless burst data transmission relay device according to claim 1, wherein the relay device uses two subframes with a guard gap therebetween, and the relay device uses the frequency f in the first subframe 2 Receiving uplink data of the terminal and transmitting the uplink data to the terminal in the second subframe at the frequency f 2 And transmitting the data to the base station.
7. The wireless burst data transmission relay device according to claim 1, wherein in the non-relay operation mode, when there is only one terminal, the relay station can directly perform FDD full duplex data communication with it; when there are multiple terminals, the relay station communicates with it in a point-to-multipoint TDMA mode.
8. The wireless burst data transmission relay device according to claim 1, wherein in the relay operation mode, the transceiver module a in the relay device completes the relay operation of the burst information sent from the base station, namely: at frequency f 1 The information sent by the base station is received, then sent to the terminal on the frequency, and the service information is re-framed in the process, so as to eliminate the receiving/sending interference and in-band noise;
the receiving and transmitting component B completes the relay action of the burst information sent by the terminal, namely: at frequency f 2 The information sent by the terminal is received, then sent to the base station on the frequency, and the service information is re-framed in the process, so as to eliminate the receiving/sending interference and in-band noise;
in the relay working mode, the relay device adopts FDD+TDD mode communication; when a plurality of terminals exist, the relay station and the plurality of terminals are communicated in a point-to-multipoint TDMA mode;
in a relay working mode, when a receiving and transmitting component A and a receiving and transmitting component B in the relay device work in a TDD mode, the time delay between two operations of opening a power amplifier and opening an isolating switch is adjusted by a low intermediate frequency signal processor to finish signal receiving/transmitting switching and realize same-frequency receiving/transmitting isolation at the same time; when the transceiver component A or the transceiver component B performs transmission/reception switching, the fast convergence and signal protection of the signal level from the non-arrival time to the time are completed by adopting a fast AGC circuit and the protection time of the frame head arranged in a low intermediate frequency signal processor, and burst signals are stably received;
in the relay working mode, when the relay device communicates with a plurality of terminals in a TDMA mode, the time delay between the relay device and the terminals is automatically adjusted; after the terminal obtains the communication delay between itself and the relay station, the time for the information frame to reach the relay station is automatically adjusted according to the delay value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310949807.9A CN116865818A (en) | 2023-07-31 | 2023-07-31 | Wireless burst data transmission relay device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310949807.9A CN116865818A (en) | 2023-07-31 | 2023-07-31 | Wireless burst data transmission relay device |
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| Publication Number | Publication Date |
|---|---|
| CN116865818A true CN116865818A (en) | 2023-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310949807.9A Pending CN116865818A (en) | 2023-07-31 | 2023-07-31 | Wireless burst data transmission relay device |
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| CN (1) | CN116865818A (en) |
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- 2023-07-31 CN CN202310949807.9A patent/CN116865818A/en active Pending
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