CN114567361B - FDD/TDD dual-mode microwave direct amplification relay station - Google Patents
FDD/TDD dual-mode microwave direct amplification relay station Download PDFInfo
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- CN114567361B CN114567361B CN202210457737.0A CN202210457737A CN114567361B CN 114567361 B CN114567361 B CN 114567361B CN 202210457737 A CN202210457737 A CN 202210457737A CN 114567361 B CN114567361 B CN 114567361B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15557—Selecting relay station operation mode, e.g. between amplify and forward mode, decode and forward mode or FDD - and TDD mode
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
An FDD/TDD dual-mode microwave direct amplifier relay station comprises a first direct amplifier and a second direct amplifier, wherein an input port of the first direct amplifier is connected with an output port of the second direct amplifier through a second variable attenuator, and an output port of the first direct amplifier is connected with an input port of the second direct amplifier through a first variable attenuator; the ANT port of the first repeater and the ANT port of the second repeater are respectively connected with respective antennas; and the first direct amplifier and the second direct amplifier respectively realize the switching of an uplink and downlink microwave signal path in an FDD mode and an uplink and downlink microwave signal path in a TDD mode through the port switching of the matrix switch. The FDD/TDD dual-mode microwave direct amplification relay station realizes frequency division relay amplification or time division bidirectional amplification by using the duplexer and the microwave switch, and realizes the FDD/TDD mode switching of the microwave direct amplification relay station.
Description
Technical Field
The invention relates to the field of point-to-point microwave communication, in particular to a microwave direct amplification relay station.
Background
In ground microwave communication, in order to cope with complex terrains, a microwave relay station is generally adopted to perform directional radiation on an area to be covered so as to eliminate a blind area, and simultaneously, the service range of a base station can be extended, as shown in fig. 1, the microwave relay needs a pair of microwave antennas back to connect a straight repeater.
In the prior art, a microwave direct-amplifying relay station includes a Frequency Division Duplex (FDD) mode and a Time Division Duplex (TDD) mode, and in practical application, only one of the modes of the microwave direct-amplifying relay station can be adopted, and the requirements of flexible and various microwave devices cannot be met.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide an FDD/TDD dual-mode microwave direct amplification relay station, which can flexibly switch frequency division (FDD) or time division (TDD) working modes according to different working modes of microwave communication equipment.
In order to achieve the above object, the FDD/TDD dual-mode microwave repeater according to the present invention comprises a first repeater and a second repeater, wherein,
an input port of the first straight amplifier is connected with an output port of the second straight amplifier through a second variable attenuator, and an output port of the first straight amplifier is connected with an input port of the second straight amplifier through a first variable attenuator; the ANT port of the first repeater and the ANT port of the second repeater are respectively connected with a first antenna and a second antenna;
and the first direct amplifier and the second direct amplifier realize the switching of an uplink and downlink microwave signal path in an FDD mode or an uplink and downlink microwave signal path in a TDD mode through the port switching of the matrix switch respectively.
Further, the first repeater includes a first duplexer, a first matrix switch, a first power amplifier, and a first low noise amplifier, wherein,
the public end of the first duplexer is connected with a first antenna through an ANT port of the first repeater; the RX port of the first matrix switch is connected with the P1 port of the first matrix switch; the TX port of the first matrix switch is connected with the P2 port of the first matrix switch;
the P3 port of the first matrix switch is connected with the output end of the first power amplifier; the P4 port of the first low noise amplifier is connected with the input end of the first low noise amplifier;
the input end of the first power amplifier is connected with the input port of the first amplifier and is connected with the output port of the second amplifier through a second variable attenuator;
the output end of the first low noise amplifier is connected with the output port of the first amplifier and is connected with the input port of the second amplifier through a first variable attenuator.
Further, the first duplexer further includes a first high frequency filter and a first low frequency filter, wherein,
one end of the first high-frequency filter is connected with one end of the first low-frequency filter, the first high-frequency filter serves as a common end of the first duplexer, and the first high-frequency filter is connected with a first antenna through an ANT port of the first repeater;
the other end of the first high-frequency filter is connected with a P1 port of the first matrix switch through the RX port of the first duplexer;
the other end of the low frequency filter is connected to the P2 port of the first matrix switch through the first duplexer TX port.
Further, the second repeater further comprises a second duplexer, a second matrix switch, a second power amplifier, and a second low noise amplifier, wherein,
the public end of the second duplexer is connected with a second antenna through an ANT port of the second repeater; the RX port of the second matrix switch is connected with the P3 port of the second matrix switch; its TX port is connected to the P4 port of the second matrix switch;
the P1 port of the second matrix switch is connected with the input end of the second low noise amplifier; the port P2 of the power amplifier is connected with the output end of the second power amplifier;
the input end of the second power amplifier is connected with the input port of the second amplifier and is connected with the output port of the first amplifier through a first variable attenuator;
the output end of the second low noise amplifier is connected with the output port of the second amplifier and is connected with the input port of the first amplifier through a second variable attenuator.
Further, the second duplexer includes a second high frequency filter and a second low frequency filter, wherein,
one end of the second high-frequency filter is connected with one end of the second low-frequency filter, and the second high-frequency filter is used as a common end of the second duplexer and is connected with a second antenna through an ANT port of the second repeater;
the other end of the second high-frequency filter is connected with a P3 port of the second matrix switch through an RX port of the second duplexer;
the other end of the low frequency filter is connected with the P4 port of the second matrix switch through the TX port of the second duplexer.
Further, when the switch between the P1 port and the P3 port of the first matrix switch is closed, the switch between the P2 port and the P4 port is closed, the switch between the P1 port and the P3 port of the second matrix switch is closed, and the switch between the P2 port and the P4 port of the second matrix switch is closed, the FDD/TDD dual-mode microwave repeater station works in an FDD mode.
Furthermore, the first matrix switch switches the P2 port to the P3 port or the P4 port according to the carrier time slot, the second matrix switch switches the P4 port to the P1 port or the P2 port according to the carrier time slot, and the FDD/TDD dual-mode microwave repeater station operates in the TDD mode.
Compared with the prior art, the FDD/TDD dual-mode microwave direct amplification relay station has the following beneficial effects:
the microwave signal bidirectional amplification between the two microwave relay antennas is realized, and the time division or frequency division direct amplification function of the microwave signal is completed; a duplexer is used for realizing frequency division relay amplification; the microwave switch is utilized to realize time division bidirectional amplification, the switching of an FDD mode or a TDD mode of the microwave direct-amplification relay station is realized, the application scenes of the microwave direct-amplification relay station are increased, and the microwave direct-amplification relay station has wide market prospect.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a microwave relay system;
FIG. 2 is a schematic block diagram of an FDD/TDD dual-mode microwave repeater according to the present invention;
FIG. 3 is a schematic block diagram of an FDD/TDD dual-mode microwave repeater station operating in an FDD mode according to the present invention;
fig. 4 is a schematic block diagram of an FDD/TDD dual-mode microwave repeater operating in TDD mode according to the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it should be understood that they are presented herein only to illustrate and explain the present invention and not to limit the present invention.
Example 1
Fig. 2 is a schematic structural diagram of an FDD/TDD dual-mode microwave repeater according to the present invention, and as shown in fig. 2, the FDD/TDD dual-mode microwave repeater according to the present invention includes a first repeater 10 and a second repeater 20, wherein,
a first linear amplifier 10, an input port (N port) of which is connected to an output port (SMA port) of the second linear amplifier 20 through a second variable attenuator 44, and an output port (SMA port) of which is connected to an input port (N port) of the second linear amplifier 20 through a first variable attenuator 34;
an ANT port of the first repeater 10 is connected to the antenna 1, and an ANT port of the second repeater 20 is connected to the antenna 2.
The first repeater 10 and the second repeater 20 respectively realize the switching of the uplink and downlink microwave signal paths and the uplink and downlink microwave signal paths in the FDD mode through the port switching of the matrix switch.
In the embodiment of the present invention, the first repeater 10 further includes a first duplexer 11, a first matrix switch 12, a first power amplifier 13, and a first low noise amplifier 14, wherein,
a first duplexer 11 having a common terminal connected to the antenna 1 through an ANT port of the first repeater 10; its RX port is connected to the P1 port of the first matrix switch 12; its TX port is connected to the P2 port of the first matrix switch 12.
A first matrix switch 12, the P3 port of which is connected to the output of the first power amplifier 13; its P4 port is connected to the input of the first low noise amplifier 14.
The input end of the first power amplifier 13 is connected to the N port of the first direct amplifier 10, and is connected to the SMA port of the second direct amplifier 20 through the second variable attenuator 44.
The output terminal of the first low noise amplifier 14 is connected to the SMA port of the first direct amplifier 10 and is connected to the N port of the second direct amplifier 20 through the first variable attenuator 34.
In the embodiment of the present invention, the first duplexer 11 includes a high frequency filter 110 and a low frequency filter 111, wherein,
one end of the high-frequency filter 110 and one end of the low-frequency filter 111 are connected to each other, and the antenna 1 is connected to the common terminal of the first duplexer 11 through an ANT port of the first repeater 10.
The other end of the high frequency filter 110 is connected to the P1 port of the first matrix switch 12 via the RX port.
The other end of the low frequency filter 111 is connected to the P2 port of the first matrix switch 12 through the TX port.
In the embodiment of the present invention, the second repeater 20 further includes a second duplexer 21, a second matrix switch 22, a second power amplifier 23, and a second low noise amplifier 24, wherein,
a second duplexer 21 having a common terminal connected to the antenna 2 through an ANT port of the second repeater 20; its RX port is connected to the P3 port of the second matrix switch 22; its TX port is connected to the P4 port of the second matrix switch 22.
A second matrix switch 22 having a P1 port connected to an input of a second low noise amplifier 24; its P2 port is connected to the output of the second power amplifier 23.
The input end of the second power amplifier 23 is connected to the N port of the second linear amplifier 20 and is connected to the SMA port of the first linear amplifier 10 through the first variable attenuator 34.
The output end of the second low noise amplifier 24 is connected to the SMA port of the second direct amplifier 20, and is connected to the N port of the first direct amplifier 10 through the second variable attenuator 44.
In the embodiment of the present invention, the second duplexer 21 includes a high frequency filter 210 and a low frequency filter 211, wherein,
one end of the high frequency filter 210 and one end of the low frequency filter 211 are connected to each other, and the antenna 2 is connected to the ANT port of the second repeater 20 as a common terminal of the second duplexer 21.
The other end of the high frequency filter 210 is connected to the P3 port of the second matrix switch 22 through the RX port.
The other end of the low frequency filter 211 is connected to the P4 port of the second matrix switch 22 via the TX port.
In the embodiment of the present invention, the present invention further includes a first detector 31, a first AGC controller 32, and a TDD clock extracting module 33, wherein,
the input end of the first detector 31 is connected to the output end of the first low noise amplifier 14, and detects the output signal of the first low noise amplifier 14; the output end of the first AGC controller 32 is connected to the input end of the TDD clock extraction module 33, and the detection signal is sent to the first AGC controller 32 and the TDD clock extraction module 33.
The output terminal of the first AGC controller 32 is connected to the control input terminal of the first variable attenuator 34, and controls the attenuation of the first variable attenuator 34.
The output end of the TDD clock extracting module 33 is connected to the control input end of the first matrix switch 12 and the control input end of the second matrix switch 22, respectively, so as to perform switching control on the first matrix switch 12 and the second matrix switch 22.
In the embodiment of the present invention, the present invention further includes a second detector 41 and a second AGC controller 42, wherein an input end of the second detector 41 is connected to an output end of the second low noise amplifier 24, and detects an output signal of the second low noise amplifier 24; the output of which is connected to the input of the second AGC controller 42 and sends the detected signal to the second AGC controller 42.
And a second AGC controller 42 having an output terminal connected to a control input terminal of the second variable attenuator 44, for controlling the attenuation of the second variable attenuator 44.
Example 2
Fig. 3 is a schematic block diagram of an FDD/TDD dual-mode microwave direct amplifying relay station according to the present invention operating in an FDD mode, as shown in fig. 3, when the FDD/TDD dual-mode microwave direct amplifying relay station of the present invention operates in an FDD mode,
the first matrix switch 12 of the first repeater 10, with the switch between the P1 port and the P3 port closed, is set to the pass-through state; the switch between its P2 port and P4 port is closed and set to a pass-through state.
The second matrix switch 22 of the second repeater 20, with the switch between the P1 port and the P3 port closed, is set to the pass-through state; the switch between its P2 port and P4 port is closed and set to a pass-through state.
In the embodiment of the invention, when the FDD/TDD dual-mode microwave direct amplification repeater station works in an FDD mode, the uplink and downlink microwave frequencies are different, the first repeater station 10 is set as a main station, and the uplink and downlink microwave frequencies are high-transmission and low-reception; the second repeater 20 is set as a slave station, and the uplink and downlink microwave frequencies are low-frequency and high-frequency.
In the embodiment of the invention, in an FDD mode, a relay station downlink channel transmits a received signal of downlink microwave (carrier frequency is f 1) from a front-end master station communication direction received by a donor antenna (antenna 1) to a far-end slave station direction through a digital attenuator, a power amplifier and a low-frequency filter after being amplified by a low-frequency filter and low noise;
on the contrary, the uplink channel receives the uplink microwave (carrier frequency f 1) from the communication direction of the remote slave station by the retransmission antenna (antenna 2)ˊ) The received signal is amplified by a high-frequency filter and low noise, and then passes through a digital attenuator, a power amplifier and a high-frequency filter and then is transmitted back to the front-end master station through a donor antenna (antenna 1).
Example 3
Fig. 4 is a schematic block diagram of an FDD/TDD dual-mode microwave direct amplifying relay station according to the present invention operating in a TDD mode, as shown in fig. 4, when the FDD/TDD dual-mode microwave direct amplifying relay station of the present invention operates in the TDD mode, uplink and downlink microwave frequencies are the same, wherein,
the first matrix switch 12 of the first repeater 10 switches the P2 port to the P3 port or the P4 port according to the carrier time slot, and the second matrix switch 22 of the second repeater 20 switches the P4 port to the P1 port or the P2 port according to the carrier time slot, so as to implement the switching of the upper and lower microwave paths of the TDD microwave repeater.
Those of ordinary skill in the art will understand that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. An FDD/TDD dual-mode microwave direct-amplification relay station is characterized by comprising a first direct-amplification machine and a second direct-amplification machine, wherein,
an input port of the first straight amplifier is connected with an output port of the second straight amplifier through a second variable attenuator, and an output port of the first straight amplifier is connected with an input port of the second straight amplifier through a first variable attenuator; the ANT port of the first repeater and the ANT port of the second repeater are respectively connected with a first antenna and a second antenna;
the first repeater and the second repeater respectively realize the switching of an uplink microwave signal path and a downlink microwave signal path in an FDD mode and an uplink microwave signal path and a downlink microwave signal path in a TDD mode through the port switching of the matrix switch;
the first repeater comprising a first duplexer, a first matrix switch, a first power amplifier, and a first low noise amplifier, wherein,
the public end of the first duplexer is connected with a first antenna through an ANT port of the first repeater; the RX port of the first matrix switch is connected with the P1 port of the first matrix switch; the TX port of the first matrix switch is connected with the P2 port of the first matrix switch;
the P3 port of the first matrix switch is connected with the output end of the first power amplifier; the port P4 of the low noise amplifier is connected with the input end of the first low noise amplifier;
the input end of the first power amplifier is connected with the input port of the first amplifier and is connected with the output port of the second amplifier through a second variable attenuator;
the output end of the first low noise amplifier is connected with the output port of the first amplifier and is connected with the input port of the second amplifier through a first variable attenuator;
the second repeater further comprises a second duplexer, a second matrix switch, a second power amplifier, and a second low noise amplifier, wherein,
the public end of the second duplexer is connected with a second antenna through an ANT port of the second repeater; the RX port of the second matrix switch is connected with the P3 port of the second matrix switch; its TX port is connected to the P4 port of the second matrix switch;
the P1 port of the second matrix switch is connected with the input end of the second low noise amplifier; the port P2 of the power amplifier is connected with the output end of the second power amplifier;
the input end of the second power amplifier is connected with the input port of the second amplifier and is connected with the output port of the first amplifier through a first variable attenuator;
the output end of the second low noise amplifier is connected with the output port of the second amplifier and is connected with the input port of the first amplifier through a second variable attenuator.
2. The FDD/TDD dual-mode microwave direct amplification relay station as claimed in claim 1, wherein said first duplexer further comprises a first high frequency filter and a first low frequency filter, wherein,
one end of the first high-frequency filter is connected with one end of the first low-frequency filter to serve as a common end of the first duplexer, and the first high-frequency filter is connected with a first antenna through an ANT port of the first repeater;
the other end of the first high-frequency filter is connected with the P1 port of the first matrix switch through the RX port of the first duplexer;
the other end of the first low frequency filter is connected to the P2 port of the first matrix switch through the first duplexer TX port.
3. The FDD/TDD dual-mode microwave direct amplification relay station as claimed in claim 2, wherein said second duplexer comprises a second high frequency filter and a second low frequency filter, wherein,
one end of the second high-frequency filter is connected with one end of the second low-frequency filter, and the second high-frequency filter is used as a common end of the second duplexer and is connected with a second antenna through an ANT port of the second repeater;
the other end of the second high-frequency filter is connected with a P3 port of the second matrix switch through an RX port of the second duplexer;
the other end of the second low frequency filter is connected to the P4 port of the second matrix switch through the TX port of the second duplexer.
4. The FDD/TDD dual-mode microwave direct amplification repeater station according to claim 3, wherein when the switch between the P1 port and the P3 port of the first matrix switch is closed, the switch between the P2 port and the P4 port is closed, the switch between the P1 port and the P3 port of the second matrix switch is closed, and the switch between the P2 port and the P4 port is closed, the FDD/TDD dual-mode microwave direct amplification repeater station operates in an FDD mode.
5. The FDD/TDD dual-mode microwave direct amplification relay station as claimed in claim 3, wherein said first matrix switch switches P2 port to P3 port or P4 port according to carrier time slot, said second matrix switch switches P4 port to P1 port or P2 port according to carrier time slot, and said FDD/TDD dual-mode microwave direct amplification relay station operates in TDD mode.
6. The FDD/TDD dual-mode microwave direct amplifying relay station according to claim 3, further comprising a first detector, a first AGC controller, and a TDD clock extraction module, wherein,
the input end of the first detector is connected with the output end of the first low-noise amplifier, and the output signal of the first low-noise amplifier is detected; the output end of the first AGC controller is respectively connected with the input end of the first AGC controller and the input end of the TDD clock extraction module, and the detection signals are respectively sent to the first AGC controller and the TDD clock extraction module;
the output end of the first AGC controller is connected with the control input end of the first variable attenuator to control the attenuation of the first variable attenuator;
and the output end of the TDD clock extraction module is respectively connected with the control input end of the first matrix switch and the control input end of the second matrix switch, and the TDD clock extraction module is used for carrying out switch switching control on the first matrix switch and the second matrix switch.
7. The FDD/TDD dual-mode microwave direct amplification relay station as claimed in claim 3, further comprising a second detector, a second AGC controller, wherein,
the input end of the second detector is connected with the output end of the second low-noise amplifier, and the output signal of the second low-noise amplifier is detected; the output end of the second AGC controller is connected with the input end of the second AGC controller, and the detection signal is sent to the second AGC controller;
and the output end of the second AGC controller is connected with the control input end of the second variable attenuator to control the attenuation of the second variable attenuator.
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| EP3750754A2 (en) * | 2019-05-24 | 2020-12-16 | Wilson Electronics, LLC | Repeater with low power mode for mobile operations |
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| US11038542B2 (en) * | 2018-12-31 | 2021-06-15 | Wilson Electronics, Llc | Active multiplexer repeater accessory |
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| CN104601192A (en) * | 2013-11-01 | 2015-05-06 | 南京亚瑟电子科技有限公司 | Front-end unit design scheme supporting simultaneous working of TDD (Time Division Duplexing) and FDD (Frequency Division Duplexing) |
| CN105471490A (en) * | 2014-09-05 | 2016-04-06 | 中国移动通信集团公司 | Repeater and signal processing method thereof |
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