CN115842616A - Broadband receiver and transmitter synchronous communication system for remote communication - Google Patents
Broadband receiver and transmitter synchronous communication system for remote communication Download PDFInfo
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- CN115842616A CN115842616A CN202310168910.XA CN202310168910A CN115842616A CN 115842616 A CN115842616 A CN 115842616A CN 202310168910 A CN202310168910 A CN 202310168910A CN 115842616 A CN115842616 A CN 115842616A
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Abstract
The invention relates to the technical field of remote communication, and discloses a broadband receiver and transmitter synchronous communication system for remote communication. The invention solves the problems of frequency synchronization and phase synchronization, complex system structure, high power consumption and the like of the long-distance broadband transceiver in the prior art.
Description
Technical Field
The invention relates to the technical field of remote communication, in particular to a broadband receiver and transmitter synchronous communication system for remote communication.
Background
Under the condition that the distance between the receiver and the transmitter is long, the frequency synchronization and the phase synchronization of the received and transmitted signals need to be ensured. The frequency synchronization needs to ensure complete reference of the reference signal, and the phase synchronization needs to ensure the phase synchronization of the frequency hopping local oscillator.
At present, remote reference is realized, and a high-precision 1pps second pulse signal issued by a satellite-borne atomic clock can be used as a reference signal.
By adopting a direct frequency synthesis mode, narrow-band phase synchronization local oscillation signals can be realized, and then the phase synchronization of a receiver and a transmitter is ensured.
The broadband receiver and the broadband transmitter need to use broadband local oscillation signals, adopt a traditional direct frequency synthesis mode, are difficult to realize broadband synchronous local oscillation signals, and have complex system structures and higher power consumption.
Therefore, how to achieve frequency synchronization and phase synchronization of a long-distance broadband transceiver is a technical problem to be solved urgently.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a synchronous communication system of a broadband receiver and a transmitter for remote communication, which solves the problems of frequency synchronization and phase synchronization, complex system structure, higher power consumption and the like of the prior art for realizing the remote broadband receiver and transmitter.
The technical scheme adopted by the invention for solving the problems is as follows:
a broadband receiver and transmitter synchronous communication system for remote communication comprises a transmitter, a first phase synchronization local oscillation source, a constant temperature crystal oscillator, a first optical module, an optical fiber, a second optical module, a phase-locked crystal oscillator, a second phase synchronization local oscillation source and a receiver which are sequentially in communication connection.
As a preferred technical solution, an input end of the first phase-locked local oscillator source is connected to a first signal output end of the constant-temperature crystal oscillator, and an output end of the first phase-locked local oscillator source is connected to an input end of the transmitter; the input end of the first optical module is connected with the second signal output end of the constant-temperature crystal oscillator, and the output end of the first optical module is connected with the input end of an optical fiber; the input end of the second optical module is connected with the output end of the optical fiber, and the output end of the second optical module is connected with the input end of the phase-locked crystal oscillator; the input end of the second phase synchronization local oscillation source is connected with the output end of the phase-locked crystal oscillator, and the output end of the second phase synchronization local oscillation source is connected with the input end of the receiver.
As a preferred technical solution, a first signal output end of the constant temperature crystal oscillator provides a reference signal to a first phase synchronization local oscillator source, and the first phase synchronization local oscillator source performs frequency synthesis on the input reference signal to generate a local oscillator signal required by a transmitter.
As a preferred technical solution, the first phase synchronization local oscillation source outputs a local oscillation signal to the transmitter, so as to implement a wideband up-conversion function of the transmitter.
As a preferred technical solution, the phase-locked crystal oscillator synchronizes the electrical signal output by the second optical module to the output of the phase-locked crystal oscillator, so as to ensure that the reference of the receiver and the reference of the transmitter are the same.
As a preferred technical solution, the output end of the phase-locked crystal oscillator provides a reference signal to the second phase synchronous local oscillator source, and the second phase synchronous local oscillator source performs frequency synthesis on the input reference signal to generate a local oscillator signal required by the receiver.
As a preferred technical solution, the second phase synchronization local oscillation source outputs a local oscillation signal to the receiver, so as to implement a broadband down-conversion function of the receiver.
As a preferred technical scheme, the first phase synchronization local oscillation source and the second phase synchronization local oscillation source respectively output three local oscillation signals; the two local oscillator signals are dot frequency signals, and the other local oscillator signal is a broadband frequency hopping signal.
As a preferable technical scheme, the local oscillator generates a frequency hopping signal by using a phase resynchronization phase-locked loop, and generates a broadband frequency hopping signal after frequency mixing and switch filtering.
As a preferred technical solution, the clock of the control circuit of the first phase-synchronous local oscillator is synchronized with the external reference signal, and the clock of the control circuit of the second phase-synchronous local oscillator is synchronized with the external reference signal.
Compared with the prior art, the invention has the following beneficial effects:
(1) The invention can realize broadband synchronous local oscillator signals, and has simple system structure and lower power consumption;
(2) The invention can solve the synchronization problem of the double-station radar system;
(3) The invention can also construct a 5G communication synchronous networking architecture.
Drawings
Fig. 1 is a schematic structural diagram of a synchronous communication system of a broadband receiver and a transmitter for remote communication according to the present invention.
Reference numbers and corresponding part names in the drawings: 1. the system comprises a transmitter, 2, a first phase synchronous local oscillation source, 3, a constant temperature crystal oscillator, 4, a first optical module, 5, an optical fiber, 6, a second optical module, 7, a phase-locked crystal oscillator, 8, a second phase synchronous local oscillation source, 9 and a receiver.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited to these examples.
Example 1
As shown in fig. 1, the main purpose of the present invention is to solve the technical problems of difficulty in implementing a wideband synchronous local oscillator signal, complex system structure and high power consumption in the prior art.
In order to achieve the above object, the present invention provides a remote broadband receiver transmitter synchronization technique based on fiber communication and phase resynchronization phase locked loop, and in particular, a broadband receiver and transmitter synchronization communication system for remote communication, comprising: the system comprises a constant-temperature crystal oscillator 3, a first phase synchronous local oscillation source 2, a transmitter 1, a first optical module 4, an optical fiber 5, a second optical module 6, a phase-locked crystal oscillator 7, a second phase synchronous local oscillation source 8 and a receiver 9; a first signal output end of the constant temperature crystal oscillator 3 is connected with an input end of a first phase synchronization local oscillation source 2, an output end of the first phase synchronization local oscillation source 2 is connected with an input end of the transmitter 1, a second signal output end of the constant temperature crystal oscillator 3 is connected with an input end of a first optical module 4, an output end of the first optical module 4 is connected with an input end of an optical fiber 5, an output end of the optical fiber 5 is connected with an input end of a second optical module 6, an output end of the second optical module 6 is connected with an input end of a phase-locked crystal oscillator 7, an output end of the phase-locked crystal oscillator 7 is connected with an input end of a second phase synchronization local oscillation source 8, and an output end of the second phase synchronization local oscillation source 8 is connected with an input end of a receiver 9; wherein:
preferably, a first signal output end of the constant temperature crystal oscillator 3 provides a reference signal to the first phase synchronization local oscillator source 2, and the first phase synchronization local oscillator source 2 performs frequency synthesis on the input reference signal to generate a local oscillator signal required by the transmitter 1, wherein the broadband frequency hopping signal is realized by using a phase-locked loop with a phase resynchronization function, and other spot frequency local oscillator signals can be directly phase-locked;
preferably, the first phase synchronization local oscillation source 2 outputs a local oscillation signal to the transmitter 1, so as to implement a broadband up-conversion function of the transmitter 1.
Preferably, a second signal output end of the constant temperature crystal oscillator 3 is connected with an optical module, and the optical module converts the reference signal into an optical signal; the optical signal is transmitted to a second optical module 6 through an optical fiber 5 in a long distance; the second optical module 6 converts the received optical signal into an electrical signal;
preferably, the phase-locked crystal oscillator 7 synchronizes the electrical signal output by the second optical module 6 to the phase-locked crystal oscillator 7 for output, so as to ensure that the reference of the receiver 9 and the reference of the transmitter 1 are completely the same;
preferably, the output end of the phase-locked crystal oscillator 7 provides a reference signal to the second phase synchronous local oscillator 8, and the second phase synchronous local oscillator 8 performs frequency synthesis on the input reference signal to generate a local oscillator signal required by the receiver 9, wherein the broadband frequency hopping signal is implemented by using a phase-locked loop having a phase resynchronization function, and other spot frequency local oscillator signals can be implemented by directly phase-locking;
preferably, the second phase synchronous local oscillator 8 outputs a local oscillator signal to the receiver 9, so as to implement a broadband down-conversion function of the receiver 9.
Preferably, the frequency implementation manners of the receiver 9 and the transmitter 1 are opposite, and the frequency points of the local oscillation signals are completely consistent;
preferably, the circuits of the first phase synchronization local oscillator 2 and the second phase synchronization local oscillator 8 are completely consistent with the frequency hopping algorithm. And outputting 3 paths of local oscillation signals, wherein the local oscillation 2 and the local oscillation 3 are dot frequency signals, and the local oscillation 1 is a broadband frequency hopping signal.
Preferably, the local oscillator 1 uses a phase resynchronization phase-locked loop to implement a frequency hopping signal, and implements a broadband frequency hopping signal after frequency mixing and switch filtering.
Preferably, the control circuit clocks of the first phase-synchronous local oscillator 2 and the second phase-synchronous local oscillator 8 need to be synchronized with an external reference signal.
In the invention, the remote receiver 9 and the transmitter 1 participate in the same way through the constant temperature crystal oscillator 3, the optical module, the optical fiber 5 circuit and the phase-locked crystal oscillator 7. Generating 3 local oscillation signals required by a receiver 9 and a transmitter 1 through a phase synchronization local oscillation source, wherein a local oscillation 2 and a local oscillation 3 are dot frequency signals; the local oscillator 1 uses a phase resynchronization phase-locked loop to realize frequency hopping signals, and broadband frequency hopping signals are realized after frequency mixing and switch filtering. The frequency implementation of the receiver 9 is the same as that of the transmitter 1, and the frequency points of the local oscillation signals are completely consistent.
The invention adopts the optical fiber 5 communication and phase resynchronization phase-locked loop technology on the basis of the common receiving and transmitting machine 1, and aims to solve the technical problems that the broadband synchronization local oscillation signal is difficult to realize, the system structure is complex and the power consumption is high in the prior art.
As described above, the present invention can be preferably realized.
All features disclosed in all embodiments in this specification, or all methods or process steps implicitly disclosed, may be combined and/or expanded, or substituted, in any way, except for mutually exclusive features and/or steps.
The foregoing is only a preferred embodiment of the present invention, and the present invention is not limited thereto in any way, and any simple modification, equivalent replacement and improvement made to the above embodiment within the spirit and principle of the present invention still fall within the protection scope of the present invention.
Claims (10)
1. The broadband receiver and transmitter synchronous communication system for remote communication is characterized by comprising a transmitter (1), a first phase synchronous local oscillation source (2), a constant-temperature crystal oscillator (3), a first optical module (4), an optical fiber (5), a second optical module (6), a phase-locked crystal oscillator (7), a second phase synchronous local oscillation source (8) and a receiver (9) which are sequentially in communication connection.
2. A broadband receiver and transmitter synchronous communication system for telecommunication according to claim 1, characterized in that an input of the first phase-locked local oscillator source (2) is connected to a first signal output of the thermostatic crystal oscillator (3), and an output of the first phase-locked local oscillator source (2) is connected to an input of the transmitter (1); the input end of the first optical module (4) is connected with the second signal output end of the constant-temperature crystal oscillator (3), and the output end of the first optical module (4) is connected with the input end of an optical fiber (5); the input end of the second optical module (6) is connected with the output end of the optical fiber (5), and the output end of the second optical module (6) is connected with the input end of the phase-locked crystal oscillator (7); the input end of the second phase synchronization local oscillation source (8) is connected with the output end of the phase-locked crystal oscillator (7), and the output end of the second phase synchronization local oscillation source (8) is connected with the input end of the receiver (9).
3. A broadband receiver and transmitter synchronous communication system for telecommunication according to claim 2, characterized in that the first signal output terminal of the constant temperature crystal oscillator (3) provides a reference signal to the first phase synchronization local oscillator source (2), and the first phase synchronization local oscillator source (2) performs frequency synthesis on the input reference signal to generate the local oscillator signal required by the transmitter (1).
4. A broadband receiver and transmitter synchronous communication system for telecommunication according to claim 3, characterized in that the first phase synchronization local oscillator source (2) outputs a local oscillator signal to the transmitter (1) to implement the broadband up-conversion function of the transmitter (1).
5. A broadband receiver and transmitter synchronous communication system for telecommunication according to claim 4, characterized in that the phase-locked crystal oscillator (7) synchronizes the electrical signal outputted by the second optical module (6) to the output of the phase-locked crystal oscillator (7), ensuring that the reference of the receiver (9) and the transmitter (1) are in the same reference.
6. A broadband receiver and transmitter synchronous communication system for telecommunication according to claim 5, characterized in that the output of the phase-locked crystal oscillator (7) provides a reference signal to the second phase synchronous local oscillator source (8), and the second phase synchronous local oscillator source (8) performs frequency synthesis on the input reference signal to generate the local oscillator signal required by the receiver (9).
7. A broadband receiver and transmitter synchronous communication system for telecommunication according to claim 6, wherein the second phase synchronous local oscillator source (8) outputs a local oscillator signal to the receiver (9) to implement a broadband down-conversion function of the receiver (9).
8. A broadband receiver and transmitter synchronous communication system for telecommunication according to claim 7, characterized in that the first phase synchronous local oscillator source (2) and the second phase synchronous local oscillator source (8) each output three local oscillator signals; the two local oscillation signals are dot frequency signals, and the other local oscillation signal is a broadband frequency hopping signal.
9. The system of claim 8, wherein the other local oscillator signal generates a frequency hopping signal using a phase re-synchronization pll, and the frequency hopping signal is mixed and filtered by a switch to generate the wideband frequency hopping signal.
10. A broadband receiver and transmitter synchronous communication system for telecommunication according to any one of claims 1 to 9, characterized in that the control circuit clock of the first phase synchronous local oscillator (2) is synchronized with the external reference signal and the control circuit clock of the second phase synchronous local oscillator (8) is synchronized with the external reference signal.
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