CN102035591A - Signal periodic synchronization method and system - Google Patents
Signal periodic synchronization method and system Download PDFInfo
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- CN102035591A CN102035591A CN2009100937329A CN200910093732A CN102035591A CN 102035591 A CN102035591 A CN 102035591A CN 2009100937329 A CN2009100937329 A CN 2009100937329A CN 200910093732 A CN200910093732 A CN 200910093732A CN 102035591 A CN102035591 A CN 102035591A
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Abstract
The embodiment of the invention relates to a signal periodic synchronization method and a signal periodic synchronization system. The method comprises that: a plurality of radio frequency modules of receiving equipment are subjected to periodic synchronization according to a first synchronizing signal generated by the receiving equipment; the receiving equipment transmits a second synchronizing signal to a plurality of pieces of sending equipment corresponding to the plurality of radio frequency modules; and the plurality of pieces of sending equipment and the receiving equipment are subjected to periodic synchronization according to the second synchronizing signal. In the signal periodic synchronization method and the signal periodic synchronization system, the plurality of radio frequency modules of the receiving equipment are subjected to periodic synchronization according to the first synchronizing signal, mutual interference generated when the plurality of radio frequency modules of the receiving equipment receive signals from or transmit signals to the plurality of pieces of sending equipment is avoided, and the transmission performance of a multipath signal transmission system is improved.
Description
Technical field
The embodiment of the invention relates to electronic technology field, especially a kind of signal period method for synchronous and system.
Background technology
Along with the digitlization of high tone quality earphone product, microphone products also begins to adopt the wireless transmission technology based on the 2.4GHz frequency range.In a high tone quality wireless digital multi-channel microphone system, the bandwidth ratio that needs owing to every link is bigger, therefore the general wireless transmission that adopts a pair of independently radio-frequency module to finish one road microphone signal need be used many to radio-frequency module when having the multichannel microphone signal.
When having multi wireless links in the high tone quality wireless digital multi-channel microphone system, can have a plurality of microphones and a multipath reception end equipment.Microphone also is the audio frequency transmitting terminal as the voice sending ending equipment, and multipath reception end equipment also is the audio frequency receiving device as the voice receiving device.In the prior art, adopt the frame transmission cycle of receiving device and the frame transmit cycles synchronized of sending ending equipment, transmitting-receiving transmission time points in the single link between two corresponding radio frequency modules is by the clock decision of audio frequency transmitting terminal, because it is separate between each microphone end, so there is frequency deviation of clock in actual use, and accumulation along with the time, clock jitter will cause the emission state that is in that a plurality of radio-frequency modules are put at one time in the multipath reception end equipment, what have is in accepting state, and the serious signal of appearance disturbs between the wireless transmission link thereby make.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of signal period method for synchronous and system, avoids the phase mutual interference between the multiple signals, improves the transmission performance of multiple signals transmission system.
The embodiment of the invention provides a kind of signal period method for synchronous, comprising:
A plurality of radio-frequency modules of receiving device carry out cycle synchronisation according to first synchronizing signal that described receiving device generates;
Described receiving device is to sending second synchronizing signal with the corresponding a plurality of sending ending equipments of described a plurality of radio-frequency modules, and described a plurality of sending ending equipments carry out cycle synchronisation according to described second synchronizing signal and described receiving device.
The embodiment of the invention also provides a kind of signal period synchro system, comprising: have the receiving device and the corresponding a plurality of sending ending equipments of described a plurality of radio-frequency module of a plurality of radio-frequency modules, wherein,
Described a plurality of radio-frequency module carries out cycle synchronisation according to first synchronizing signal that described receiving device generates;
Described receiving device is to sending second synchronizing signal with the corresponding a plurality of sending ending equipments of described a plurality of radio-frequency modules, and described a plurality of sending ending equipments carry out cycle synchronisation according to described second synchronizing signal and described receiving device.
Signal period method for synchronous and system that the embodiment of the invention provides, a plurality of radio-frequency modules by receiving device carry out cycle synchronisation according to first synchronizing signal, and a plurality of sending ending equipments carry out cycle synchronisation according to second synchronizing signal that receiving device sends, the mutual interference mutually of having avoided a plurality of radio-frequency modules of receiving device to produce when carrying out receiving and transmitting signal with a plurality of sending ending equipments has improved the transmission performance of multiple signals transmission systems.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the schematic flow sheet of an embodiment of signal period method for synchronous of the present invention;
Fig. 2 is the schematic flow sheet of signal period of the present invention another embodiment of method for synchronous;
Fig. 3 is the structural representation of an embodiment of signal period synchro system of the present invention;
Fig. 4 is the structural representation of signal period of the present invention another embodiment of synchro system;
Fig. 5 is the middle synchronous schematic diagram of multipath reception end equipment intercycle embodiment illustrated in fig. 4;
Fig. 6 carries out the schematic diagram that synchronizing signal enables for a plurality of receiving devices in embodiment illustrated in fig. 4;
Fig. 7 carries out the schematic diagram of cycle synchronisation for a plurality of receiving devices in embodiment illustrated in fig. 4 and sending ending equipment;
Fig. 8 is the structural representation of signal period of the present invention another embodiment of synchro system.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Fig. 1 is the schematic flow sheet of an embodiment of signal period method for synchronous of the present invention, and as shown in Figure 1, the embodiment of the invention comprises the steps:
A plurality of radio-frequency modules of step 101, receiving device carry out cycle synchronisation according to first synchronizing signal that receiving device generates;
The signal period method for synchronous that the embodiment of the invention provides, a plurality of radio-frequency modules of receiving device carry out cycle synchronisation according to first synchronizing signal, and a plurality of sending ending equipments carry out cycle synchronisation according to second synchronizing signal that receiving device sends, the mutual interference mutually of having avoided a plurality of radio-frequency modules of receiving device to produce when carrying out receiving and transmitting signal with a plurality of sending ending equipments has improved the transmission performance of multiple signals transmission systems.
Fig. 2 is the schematic flow sheet of signal period of the present invention another embodiment of method for synchronous, and as shown in Figure 2, the embodiment of the invention comprises the steps:
Generate first synchronizing signal in the radio-frequency module in a plurality of radio-frequency modules of step 201, receiving device;
All the other radio-frequency modules in step 202, a plurality of radio-frequency module carry out cycle synchronisation according to first synchronizing signal;
In above-mentioned steps 201 and the step 202, suppose that receiving device has N radio-frequency module (N is greater than or equal to 2 integer), for example: first radio-frequency module in N radio-frequency module generates first synchronizing signal, particularly, thereby can interrupt making first synchronizing signal of first radio-frequency module by the counter of first radio-frequency module inside by a frame period length of counter output, when all the other N-1 radio-frequency module receives this first synchronizing signal, the level that triggers each radio-frequency module in (N-1) individual radio-frequency module by this first synchronizing signal changes and interrupts, and makes each radio-frequency module change the actual value of the counter of revising self frame period length in the process of interrupting at level.(for example: change in the process of interrupting at each radio-frequency module level, first synchronizing signal enables all the other (N-1) individual radio-frequency modules, thereby makes that the frame period of N radio-frequency module is synchronous fully.The embodiment of the invention is that example describes with first radio-frequency module only for convenience of description, does not constitute the restriction to the embodiment of the invention, all can as long as interrupt producing first synchronizing signal by the arbitrary radio-frequency module in a plurality of radio-frequency modules according to counter.
In above-mentioned steps 203 and the step 204, when sending ending equipment receives the answer signal of receiving device transmission, as second synchronizing signal, sending ending equipment passes through the synchronous of realization of reset cycle counter and receiving device according to this second synchronizing signal with this answer signal; For example: counter reference count frequency is 16 megahertzes (MHz), be that each gate time is 1/16 microsecond (uS), the frame period of supposing sending ending equipment is 2 milliseconds (mS), then the count range of counter in a frame period is 0～31999 (2mS/ (1/16uS)-1), suppose Theoretical Calculation according to the rf data transmission time, time when sending ending equipment is received answer signal is the 1.9mS place, and promptly the rolling counters forward value should be 30399 * (1.9mS/ (1/16uS)-1).Therefore, when sending ending equipment is received second synchronizing signal that receiving device sends, the count value of counter is changed to 30399 gets final product; After this, sending ending equipment all carries out same rolling counters forward value replacement operation in each cycle, thereby guaranteed that the frame period of sending ending equipment and the frame period of receiving device are synchronous, avoided because the signal that receiving device and sending ending equipment produce owing to clock is asynchronous disturbs.
The signal period method for synchronous that the embodiment of the invention provides, carry out cycle synchronisation by a plurality of radio-frequency modules that make receiving device according to first synchronizing signal, and a plurality of sending ending equipments carry out cycle synchronisation according to second synchronizing signal that receiving device sends, the mutual interference mutually of having avoided a plurality of radio-frequency modules of receiving device to produce when carrying out receiving and transmitting signal with a plurality of sending ending equipments has improved the transmission performance of multiple signals transmission systems.
Selectively, above-mentioned embodiment illustrated in fig. 2 in, step 201 and step 202 also can for:
Generate first synchronizing signal in the control unit of receiving device, wherein, control unit has unique frame period counter;
A plurality of radio-frequency modules of receiving device carry out cycle synchronisation according to first synchronizing signal.
By independent control unit is set at receiving device, the cycle synchronisation of a plurality of radio-frequency modules is realized by same control unit, because control unit has a unique frame period counter, therefore can unify to control the cycle synchronisation of a plurality of radio-frequency modules, the mutual interference mutually of avoiding a plurality of radio-frequency modules of receiving device when carrying out receiving and transmitting signal, to produce with a plurality of sending ending equipments.
Fig. 3 is the structural representation of an embodiment of signal period synchro system of the present invention, and as shown in Figure 3, present embodiment comprises: have a plurality of radio-frequency modules 311 receiving device 31 and with a plurality of radio-frequency module 311 corresponding a plurality of sending ending equipments 32;
Wherein, a plurality of radio-frequency modules 311 carry out cycle synchronisation according to first synchronizing signal that receiving device 31 generates; Receiving device 31 is to sending second synchronizing signal with a plurality of radio-frequency module 311 corresponding a plurality of sending ending equipments 32, and a plurality of sending ending equipments 32 carry out cycle synchronisation according to this second synchronizing signal and receiving device 31.
The signal period synchro system that the embodiment of the invention provides, receiving device 31 makes a plurality of radio-frequency modules of receiving device carry out cycle synchronisation according to first synchronizing signal by generating first synchronizing signal, receiving device 31 is by making a plurality of sending ending equipments 32 carry out cycle synchronisation with receiving device 31 to sending second synchronizing signal with a plurality of radio-frequency module 311 corresponding a plurality of sending ending equipments 32, the mutual interference mutually of having avoided a plurality of radio-frequency modules 311 on the receiving device 31 to produce when carrying out receiving and transmitting signal with a plurality of sending ending equipments 32 has improved the transmission performance of multiple signals transmission systems.
Fig. 4 is the structural representation of signal period of the present invention another embodiment of synchro system, Fig. 5 is the middle synchronous schematic diagram of multipath reception end equipment periodic embodiment illustrated in fig. 4, Fig. 6 carries out the schematic diagram that synchronizing signal enables for a plurality of receiving devices in embodiment illustrated in fig. 4, and Fig. 7 carries out the schematic diagram of cycle synchronisation for a plurality of receiving devices in embodiment illustrated in fig. 4 and sending ending equipment.
As shown in Figure 4, present embodiment comprises: receiving device 41 and a plurality of sending ending equipment 42 with a plurality of radio-frequency modules 411; Wherein, a plurality of radio-frequency modules 411 carry out cycle synchronisation according to first synchronizing signal that receiving device 41 generates; Receiving device 41 is to sending second synchronizing signal with a plurality of radio-frequency module 411 corresponding a plurality of sending ending equipments 42, and a plurality of sending ending equipments 42 carry out cycle synchronisation according to this second synchronizing signal and receiving device 41.
Further, a radio-frequency module in a plurality of radio-frequency modules 411 can be used to generate first synchronizing signal, and all the other radio-frequency modules in a plurality of radio-frequency modules 411 carry out cycle synchronisation according to this first synchronizing signal.
Further, receiving device 41 also is used for to sending answer signal as second synchronizing signal with a plurality of radio-frequency module 411 corresponding a plurality of sending ending equipments 42 at the afterbody of each Frame; A plurality of sending ending equipments 42 can also carry out cycle synchronisation by reset cycle counter and receiving device 41 according to this second synchronizing signal.
As shown in Figure 5, suppose that receiving device has N radio-frequency module (N is greater than or equal to 2 integer), first radio-frequency module in N radio-frequency module can generate first synchronizing signal, particularly, thereby can interrupt making first synchronizing signal of first radio-frequency module by the counter of first radio-frequency module inside by a frame period length of counter output, when all the other (N-1) individual radio-frequency modules receive this first synchronizing signal, the level that triggers each radio-frequency module in (N-1) individual radio-frequency module by this first synchronizing signal changes and interrupts, and makes each radio-frequency module change the actual value of the counter of revising self frame period length in the process of interrupting at level.For example: change in the process of interrupting at level at each radio-frequency module, first synchronizing signal enables all the other (N-1) individual radio-frequency modules, thereby makes that the frame period of N radio-frequency module is synchronous fully.The embodiment of the invention is that example describes with first radio-frequency module only for convenience of description, does not constitute the restriction to the embodiment of the invention, all can as long as interrupt producing first synchronizing signal by the arbitrary radio-frequency module in a plurality of radio-frequency modules according to counter.
As shown in Figure 6, the radio-frequency module that first synchronizing signal is provided the 1st frame, the 2nd frame, the 3rd frame ..., frame period begin to enable, make all the other radio-frequency modules enable, thereby frame period of each radio-frequency module of guaranteeing receiving device is synchronous fully according to this first synchronizing signal.
As shown in Figure 7, when sending ending equipment receives second synchronizing signal of receiving device transmission, particularly, this second synchronizing signal can be the answer signal that receiving device sends to sending ending equipment, for example: receiving device sends answer signal at the M frame to sending ending equipment, sending ending equipment according to this answer signal receive the moment point of this answer signal (clock synchronization shown in Figure 7 position) by the reset cycle counter realize with receiving device synchronously; For example: counter reference count frequency is 16 megahertzes (MHz), be that each gate time is 1/16 microsecond (uS), the frame period of supposing sending ending equipment is 2 milliseconds (mS), then the count range of counter in a frame period is 0～31999 (2mS/ (1/16uS)-1), Theoretical Calculation according to the rf data transmission time, time in the time of can getting sending ending equipment and receive second synchronizing signal is the 1.9mS place, and promptly the rolling counters forward value should be 30399 (1.9mS/ (1/16uS)-1).Therefore, when sending ending equipment receives the synchronizing signal of receiving device transmission, the counter instantaneous value is changed to 30399 gets final product; After this, sending ending equipment all carries out same rolling counters forward value replacement operation in each cycle, thereby guaranteed that the frame transmission cycle of sending ending equipment and the frame transmission cycle of receiving device are synchronous, avoided because the signal that receiving device and sending ending equipment produce owing to clock is asynchronous disturbs.
The signal period synchro system that the embodiment of the invention provides, receiving device 41 makes a plurality of radio-frequency modules of receiving device carry out cycle synchronisation according to first synchronizing signal by producing first synchronizing signal, receiving device 41 is by making a plurality of sending ending equipments and receiving device carry out cycle synchronisation to sending answer signal with a plurality of radio-frequency module 411 corresponding a plurality of sending ending equipments 42 as second synchronizing signal, the phase mutual interference of having avoided a plurality of radio-frequency modules on the receiving device to produce when receiving and transmitting signal has improved the transmission performance of multiple signals transmission systems.
Fig. 8 is the structural representation of signal period of the present invention another embodiment of synchro system, and as shown in Figure 8, present embodiment comprises: receiving device 81 and sending ending equipment 82; Wherein, receiving device comprises a plurality of radio-frequency modules 811 and control unit 812;
Wherein, a plurality of radio-frequency modules 811 carry out cycle synchronisation according to first synchronizing signal that receiving device 81 generates; Receiving device 81 is to sending second synchronizing signal with a plurality of radio-frequency module 811 corresponding a plurality of sending ending equipments 82, and a plurality of sending ending equipments 82 carry out cycle synchronisation according to this second synchronizing signal and receiving device 81.
Control unit 812 is used to generate first synchronizing signal; A plurality of radio-frequency modules 811 of receiving device 81 carry out cycle synchronisation according to this first synchronizing signal; Further, in the present embodiment, first synchronizing signal both can be the periodic signal that utilizes clock pulse to generate between control unit 812 and a plurality of radio-frequency module 811, also can be to be used for performance period synchronous control command by digital interface to what a plurality of radio-frequency modules 811 sent by control unit 812; Certainly, periodic signal and control command only are the example of the embodiment of the invention, do not constitute restriction to the embodiment of the invention, as long as that can generate by control unit and make a plurality of radio-frequency modules can carry out the signal or the instruction of cycle synchronisation, be described first synchronizing signal of the embodiment of the invention.
By independent control unit 812 being set at receiving device 81, the cycle synchronisation of a plurality of radio-frequency modules 811 is realized by same control unit 812, because control unit 812 has a unique frame period counter, can unify to control the operation of a plurality of radio-frequency module 811 receiving and transmitting signals, thereby make that the frame transmission cycle of a plurality of radio-frequency modules 811 is phase mutually synchronization.
Wherein, radio-frequency module 811 specifically can be the single relatively radio frequency transceiver of function, and radio frequency sends and receive the control signal decision of operation by the outside input.
Among the invention described above embodiment, receiving device is specifically as follows receiving device, and sending ending equipment is specifically as follows microphone, communicates by wireless transmission link between receiving device and the microphone.
One of ordinary skill in the art will appreciate that: all or part of step that realizes the foregoing description can be finished by the relevant hardware of program command, aforesaid program can be stored in the microcontroller read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (8)
1. a signal period method for synchronous is characterized in that, comprising:
A plurality of radio-frequency modules of receiving device carry out cycle synchronisation according to first synchronizing signal that described receiving device generates;
Described receiving device is to sending second synchronizing signal with the corresponding a plurality of sending ending equipments of described a plurality of radio-frequency modules;
Described a plurality of sending ending equipment carries out cycle synchronisation according to described second synchronizing signal and described receiving device.
2. method according to claim 1 is characterized in that, first synchronizing signal that a plurality of radio-frequency modules of described receiving device generate according to described receiving device is carried out cycle synchronisation and comprised:
A radio-frequency module in a plurality of radio-frequency modules of receiving device generates first synchronizing signal;
All the other radio-frequency modules in described a plurality of radio-frequency module carry out cycle synchronisation according to described first synchronizing signal.
3. method according to claim 1 is characterized in that, first synchronizing signal that a plurality of radio-frequency modules of described receiving device generate according to described receiving device is carried out cycle synchronisation and also comprised:
The control unit of receiving device generates first synchronizing signal;
A plurality of radio-frequency modules of described receiving device carry out cycle synchronisation according to described first synchronizing signal.
4. according to the arbitrary described method of claim 1～3, it is characterized in that, described receiving device is to sending second synchronizing signal with the corresponding a plurality of sending ending equipments of described a plurality of radio-frequency modules, and described a plurality of sending ending equipments carry out cycle synchronisation according to described second synchronizing signal and described receiving device and comprise:
Described receiving device is to sending answer signal as second synchronizing signal with the corresponding a plurality of sending ending equipments of described a plurality of radio-frequency modules at the afterbody of each Frame;
Described a plurality of sending ending equipment carries out cycle synchronisation according to described second synchronizing signal by reset cycle counter and described receiving device.
5. a signal period synchro system is characterized in that, comprising: have a plurality of radio-frequency modules receiving device and with the corresponding a plurality of sending ending equipments of described a plurality of radio-frequency modules,
Described a plurality of radio-frequency module carries out cycle synchronisation according to first synchronizing signal that described receiving device generates;
Described receiving device is to sending second synchronizing signal with the corresponding a plurality of sending ending equipments of described a plurality of radio-frequency modules, and described a plurality of sending ending equipments carry out cycle synchronisation according to described second synchronizing signal and described receiving device.
6. system according to claim 5 is characterized in that,
A radio-frequency module in described a plurality of radio-frequency module is used to generate first synchronizing signal;
All the other radio-frequency modules in described a plurality of radio-frequency module carry out cycle synchronisation according to described first synchronizing signal.
7. system according to claim 5 is characterized in that, described receiving device also comprises: control unit, and described control unit is used to generate first synchronizing signal;
A plurality of radio-frequency modules of described receiving device carry out cycle synchronisation according to described first synchronizing signal.
8. according to the arbitrary described system of claim 5～7, it is characterized in that,
Described receiving device also is used for to sending answer signal as second synchronizing signal with the corresponding a plurality of sending ending equipments of described a plurality of radio-frequency modules at the afterbody of each Frame;
Described a plurality of sending ending equipment carries out cycle synchronisation according to described second synchronizing signal by reset cycle counter and described receiving device.
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