CN102386851B - Master-slave equipment system - Google Patents
Master-slave equipment system Download PDFInfo
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- CN102386851B CN102386851B CN201110311499.4A CN201110311499A CN102386851B CN 102386851 B CN102386851 B CN 102386851B CN 201110311499 A CN201110311499 A CN 201110311499A CN 102386851 B CN102386851 B CN 102386851B
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Abstract
The invention suitable for the communication field provides a master-slave equipment system, which comprises a piece of master equipment and at least a piece of slave equipment; the master equipment generates a frequency reference signal and a first local oscillation signal according to a first clock frequency generated by a crystal oscillator, performs down frequency mixing to a communication signal input to the master equipment by using the first local oscillation signal to generate a frequency mixed signal, combines the frequency mixed signal and the frequency reference signal into a transmission signal, and sends the transmission signal to the slave equipment; and the slave equipment extracts the frequency mixed signal and the frequency reference signal from the transmission signal, generates a second local oscillation signal by the frequency for performing frequency division of the frequency reference signal to generate the second local oscillation signal, and performs up frequency mixing to the frequency mixed signal by using the second local oscillation signal so as to restore the communication signal. In the master-slave equipment system, the local oscillation signal frequencies of the master and slave equipment both refer to the same crystal oscillator frequency, so that frequency error between the frequency of the signal received by the master equipment and the frequency of the signal emitted by the slave equipment can be avoided.
Description
Technical field
The invention belongs to the communications field, relate in particular to a kind of master-slave device system.
Background technology
In the master-slave device system of the communications field, conventionally can carry out frequency-conversion processing to the signal transmitting in master-slave equipment, become required frequency to transmit signal frequency conversion at main equipment end, and from equipment end, this frequency variation signal is being reverted to primary signal.
In traditional embodiment, must all adopt constant-temperature crystal oscillator could meet the frequency accuracy of local oscillation signal and the requirement of stability as frequency reference source at master-slave equipment two ends, but the method implementation cost is high, and very difficult control of frequency accuracy put in place.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of master-slave device system, is intended to solve existing master-slave device system and must uses the problem of high accuracy and high stability crystal oscillator.
The embodiment of the present invention is achieved in that a kind of master-slave device system, comprises that a main equipment and at least one are from equipment,
The first clock frequency generated frequency reference signal and the first local oscillation signal that described main equipment produces according to crystal oscillator, utilize described the first local oscillation signal to carry out lower mixing to the signal of communication that is input to described main equipment, generate mixed frequency signal, and described mixed frequency signal and described frequency reference signal are closed to road is signal transmission, be sent to described from equipment;
Described from equipment by extracting described mixed frequency signal and described frequency reference signal described signal transmission, by described frequency reference signal frequency division is produced to the second local oscillation signal, and utilize described the second local oscillation signal to carry out uppermixing to described mixed frequency signal, thereby restore described signal of communication, described the second local oscillation signal and described the first local oscillation signal are taking same crystal oscillator as reference frequency source.
In embodiments of the present invention, main equipment and from the local oscillation signal frequency of equipment all with reference to same crystal oscillator frequency, realize thus the accurate control to master-slave equipment local oscillation signal frequency, between the frequency of the signal that makes the frequency of the signal that main equipment termination receives and launch from equipment, can not produce frequency error, under the prerequisite of constant-temperature crystal oscillator that does not need high accuracy and high stability, meet the requirement of master-slave equipment to frequency accuracy and stability.
Brief description of the drawings
Fig. 1 is the concrete structure figure of the main equipment end of the master-slave device system that provides of the embodiment of the present invention;
Fig. 2 is the concrete structure figure from equipment end of the master-slave device system that provides of the embodiment of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
In embodiments of the present invention, main equipment (proximal device) and from the local oscillation signal frequency of equipment (remote equipment) all with reference to same crystal oscillator frequency, realize thus the accurate control to master-slave equipment local oscillation signal frequency, between the frequency of the signal that makes the frequency of the signal that main equipment termination receives and launch from equipment, can not produce frequency error, under the prerequisite of constant-temperature crystal oscillator that does not need high accuracy and high stability, meet the requirement of master-slave equipment to frequency accuracy and stability.
In embodiments of the present invention, master-slave device system can be applied to proximal device in indoor distributed system such as and remote equipment, near-end frequency conversion equipment adds in the communication situations such as far-end active antenna, wireless frequency-shift repeater, comprise that main equipment and at least one are from equipment, wherein:
The first clock frequency generated frequency reference signal and the first local oscillation signal that main equipment produces according to crystal oscillator, utilize the first local oscillation signal to carry out lower mixing to the signal of communication that is input to main equipment, generate mixed frequency signal, and this mixed frequency signal and frequency reference signal are closed to road is signal transmission, be sent to from equipment.
From equipment by extracting mixed frequency signal and frequency reference signal the signal transmission receiving, generate the second local oscillation signal according to the frequency that described frequency reference signal frequency division is produced, and utilize the second local oscillation signal to carry out uppermixing to mixed frequency signal, thereby restore signal of communication, described the second local oscillation signal and described the first local oscillation signal are taking same crystal oscillator as reference frequency source.
Therefore, can know as mentioned above, the main equipment of the embodiment of the present invention and from equipment adopt local oscillation signal all with reference to the frequency from same crystal oscillator, and pass through the lower mixing of main equipment and the uppermixing from equipment, frequency error between two local oscillation signals is offset, and this master-slave device system is reduced greatly for the precision with reference to crystal oscillator and stability requirement, therefore only adopts general crystal oscillator, can meet the requirement of master-slave equipment to frequency accuracy and stability, reduce system cost.
As a preferred embodiment of the present invention, Fig. 1 shows the concrete structure of the main equipment end of the master-slave device system that the embodiment of the present invention provides, and for convenience of explanation, only shows to this and implements relevant part.
As shown in Figure 1, the main equipment of this master-slave device system has comprised:
In the present embodiment, crystal oscillator 11, as the unique original reference frequency source in master-slave device system, produces the first clock frequency.
The first power splitter 12, distributes the first clock frequency, produces second clock frequency and the 3rd clock frequency.
In the present embodiment, the first local oscillation signal is as the local oscillation signal of main equipment, and it is original frequency reference source in the first clock frequency, for carrying out mixing with the signal of communication of input main equipment.
In the present embodiment, the frequency of the frequency reference signal that second frequency synthesizer 14 produces is taking the 3rd clock frequency as benchmark, what its size need to be considered frequency can transporting, and the frequency reference signal producing can not disturb other signal formations in master-slave device system, and its concrete frequency is in this no limit.At this, frequency reference signal will transfer to from equipment in the lump, as the reference frequency source of the local oscillation signal from equipment.
The first mixting circuit 15, it carries out lower mixing according to the first local oscillation signal to the signal of communication of input main equipment, generates mixed frequency signal.
The first mixer 16, synthesizes frequency reference signal and mixed frequency signal signal transmission and is sent to from equipment.
As one embodiment of the present of invention, in the ordinary course of things, can between the first mixting circuit 15 and the first mixer 16, connect corresponding main equipment signal processing circuit, carry out the corresponding signal processing of main equipment end for the signal of communication to after mixing.Contact directly because signal processing content and the present embodiment there is no, in this explanation, but be not construed as limiting.
As another embodiment of the present invention, mixer 16 can be replaced with to the first coupler, with reach same by frequency reference signal and mixed frequency signal synthetic after the object of output.
As a preferred embodiment of the present invention, Fig. 2 shows the concrete structure from equipment end of the master-slave device system that the embodiment of the present invention provides, and for convenience of explanation, only shows to this and implements relevant part.
As shown in Figure 2, having comprised from equipment of this master-slave device system:
The second mixer 21, it extracts mixed frequency signal and frequency reference signal from the signal transmission that carrys out autonomous device receiving.
As one embodiment of the present of invention, close between road 21 at frequency divider 22 and second, can also comprise a filter amplification circuit, for the frequency reference signal extracting is carried out to filter and amplification, better frequency reference signal is carried out to frequency division.
The 3rd frequency synthesizer 23, it produces the second local oscillation signal taking the 4th clock frequency as benchmark.
In the present embodiment, the second local oscillation signal is for carrying out restoring signal of communication after uppermixing with mixed frequency signal, because it is that frequency division obtains from frequency reference signal, therefore,, there are not two frequency errors between local oscillation signal in main equipment and the frequency reference source all producing based on same crystal oscillator from the local oscillation signal of equipment.
The second mixting circuit 24, it carries out uppermixing according to the second local oscillation signal to mixed frequency signal, obtains signal of communication.
As one embodiment of the present of invention, in the ordinary course of things, can after the second mixting circuit 24, connect accordingly from device signal treatment circuit, for the signal of communication restoring being carried out to the corresponding signal processing from equipment end.Contact directly because signal processing content and the present embodiment there is no, in this explanation, but be not construed as limiting.
As another embodiment of the present invention, after frequency divider 22, can also connect the second power splitter or the second coupler, the 4th clock frequency of extracting is divided into some roads clock frequency, using the reference frequency source as the local oscillation signal in the multisystem communication of different frequency range respectively.
In embodiments of the present invention, main equipment and from the local oscillation signal frequency of equipment all with reference to same crystal oscillator frequency, realize thus the accurate control to master-slave equipment local oscillation signal frequency, between the frequency of the signal that makes the frequency of the signal that main equipment termination receives and launch from equipment, can not produce frequency error, under the prerequisite of constant-temperature crystal oscillator that does not need high accuracy and high stability, meet the requirement of master-slave equipment to frequency accuracy and stability.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. a master-slave device system, is characterized in that, comprises that a main equipment and at least one are from equipment,
The first clock frequency generated frequency reference signal and the first local oscillation signal that described main equipment produces according to crystal oscillator, utilize described the first local oscillation signal to carry out lower mixing to the signal of communication that is input to described main equipment, generate mixed frequency signal, and described mixed frequency signal and described frequency reference signal are closed to road is signal transmission, be sent to described from equipment;
Described from equipment by extracting described mixed frequency signal and described frequency reference signal described signal transmission, generate the second local oscillation signal according to the frequency that described frequency reference signal frequency division is produced, and utilize described the second local oscillation signal to carry out uppermixing to described mixed frequency signal, thereby restore described signal of communication, described the second local oscillation signal and described the first local oscillation signal are taking same crystal oscillator as reference frequency source.
2. the system as claimed in claim 1, is characterized in that, described main equipment comprises:
Crystal oscillator, for generation of the first clock frequency;
The first power splitter being connected with described crystal oscillator, for described the first clock frequency is distributed, produces second clock frequency and the 3rd clock frequency;
The first frequency synthesizer being connected with described the first power splitter, for taking described second clock frequency as benchmark, produces the first local oscillation signal;
The second frequency synthesizer being connected with described the first power splitter, for taking the 3rd clock frequency as benchmark, produces frequency reference signal;
The first mixting circuit being connected with described first frequency synthesizer, for according to described the first local oscillation signal, the signal of communication of inputting described main equipment being carried out to lower mixing, generates mixed frequency signal;
The first mixer being connected with described the first mixting circuit, for synthesizing described frequency reference signal and described mixed frequency signal signal transmission and be sent to described from equipment.
3. the system as claimed in claim 1, is characterized in that, described main equipment comprises:
Crystal oscillator, for generation of the first clock frequency;
The first power splitter being connected with described crystal oscillator, for described the first clock frequency is distributed, produces second clock frequency and the 3rd clock frequency;
The first frequency synthesizer being connected with described the first power splitter, for taking described second clock frequency as benchmark, produces the first local oscillation signal;
The second frequency synthesizer being connected with described the first power splitter, for taking the 3rd clock frequency as benchmark, produces frequency reference signal;
The first mixting circuit being connected with described first frequency synthesizer, for according to described the first local oscillation signal, the signal of communication of inputting described main equipment being carried out to lower mixing, generates mixed frequency signal;
The first coupler being connected with described the first mixting circuit, for being coupled as described frequency reference signal and described mixed frequency signal signal transmission and being sent to described from equipment.
4. the system as claimed in claim 1, is characterized in that, describedly comprises from equipment:
The second mixer, for extracting described mixed frequency signal and described frequency reference signal from described signal transmission;
The frequency divider being connected with described the second mixer, extracts the 4th clock frequency for described frequency reference signal is carried out after frequency division;
The 3rd frequency synthesizer being connected with described frequency divider, for taking described the 4th clock frequency as benchmark, produces the second local oscillation signal;
The second mixting circuit with described the 3rd frequency synthesizer and described the second mixer are connected, for according to described the second local oscillation signal, described mixed frequency signal being carried out to uppermixing, obtains described signal of communication.
5. system as claimed in claim 4, is characterized in that, describedly also comprises from equipment:
The filter amplification circuit being connected with described the second mixer and described frequency divider, for carrying out filter and amplification to described frequency reference signal.
6. system as claimed in claim 4, is characterized in that, describedly also comprises from equipment:
The second power splitter being connected with described frequency divider, for being divided into some roads clock frequency by described the 4th clock frequency.
7. system as claimed in claim 4, is characterized in that, describedly also comprises from equipment:
The second coupler being connected with described frequency divider, for being divided into some roads clock frequency by described the 4th clock frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110311499.4A CN102386851B (en) | 2011-10-14 | 2011-10-14 | Master-slave equipment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110311499.4A CN102386851B (en) | 2011-10-14 | 2011-10-14 | Master-slave equipment system |
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| Publication Number | Publication Date |
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| CN102386851A CN102386851A (en) | 2012-03-21 |
| CN102386851B true CN102386851B (en) | 2014-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110311499.4A Expired - Fee Related CN102386851B (en) | 2011-10-14 | 2011-10-14 | Master-slave equipment system |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103986565B (en) * | 2014-06-06 | 2017-05-24 | 中国电子科技集团公司第五十四研究所 | Wireless low-jitter transmission method of clock signal |
| CN105721036B (en) * | 2016-02-03 | 2019-04-16 | 北京邮电大学 | A kind of MIMO frequency conversion system |
| CN116094466B (en) * | 2023-04-12 | 2023-06-23 | 成都锐新科技有限公司 | Broadband down converter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2473822Y (en) * | 2001-04-18 | 2002-01-23 | 李震大 | Double radio frequency data transmit-receiving device |
| CN101034901A (en) * | 2007-04-29 | 2007-09-12 | 中国民航大学 | Civil aviation ground-air communication self-adaptive disturbance restraining method based on the constant mode array and its system |
| CN100477555C (en) * | 2005-04-05 | 2009-04-08 | 武汉虹信通信技术有限责任公司 | ISM frequency band mobile communication frequency shift transmission repeater |
| TW201106611A (en) * | 2008-11-07 | 2011-02-16 | Viasat Inc | Dual conversion transmitter with single local oscillator |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7212586B2 (en) * | 2002-01-18 | 2007-05-01 | Broadcom Corporation | Direct conversion RF transceiver for wireless communications |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2473822Y (en) * | 2001-04-18 | 2002-01-23 | 李震大 | Double radio frequency data transmit-receiving device |
| CN100477555C (en) * | 2005-04-05 | 2009-04-08 | 武汉虹信通信技术有限责任公司 | ISM frequency band mobile communication frequency shift transmission repeater |
| CN101034901A (en) * | 2007-04-29 | 2007-09-12 | 中国民航大学 | Civil aviation ground-air communication self-adaptive disturbance restraining method based on the constant mode array and its system |
| TW201106611A (en) * | 2008-11-07 | 2011-02-16 | Viasat Inc | Dual conversion transmitter with single local oscillator |
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| CN102386851A (en) | 2012-03-21 |
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Granted publication date: 20140625 Termination date: 20171014 |