CN102035591B - Signal periodic synchronization method and system - Google Patents
Signal periodic synchronization method and system Download PDFInfo
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- CN102035591B CN102035591B CN200910093732.9A CN200910093732A CN102035591B CN 102035591 B CN102035591 B CN 102035591B CN 200910093732 A CN200910093732 A CN 200910093732A CN 102035591 B CN102035591 B CN 102035591B
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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 present invention relates to electronic technology field, especially a kind of signal period synchronous method and system.
Background technology
Along with the digitlization of high tone quality earphone product, microphone products also starts to adopt take 2.4GHz frequency range as main wireless transmission technology.In a high tone quality wireless digital multi-channel microphone system, the bandwidth ratio needing due to every link is larger, the general wireless transmission that adopts a pair of independently radio-frequency module to complete a road microphone signal therefore need to be used multipair radio-frequency module when there is multichannel microphone signal.
While there is multi wireless links in high tone quality wireless digital multi-channel microphone system, can have a plurality of microphones and a multipath reception end equipment.Microphone, as voice sending ending equipment, is also audio frequency transmitting terminal, and multipath reception end equipment, as phonetic incepting end equipment, is also audio interface receive part.In 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 single link between two corresponding radio-frequency modules is determined by the clock of audio frequency transmitting terminal, due to separate between each microphone end, so there is in actual use frequency deviation of clock, and the accumulation along with the time, clock jitter will cause that in multipath reception end equipment, a plurality of radio-frequency modules are put at one time in emission state, have in accepting state, thereby make to occur that serious signal disturbs between wireless transmission link.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of signal period synchronous method and system, avoids the phase mutual interference between multiple signals, improves the transmission performance of multiple signals transmission system.
The embodiment of the present invention provides a kind of signal period synchronous method, comprising:
The first synchronizing signal that a plurality of radio-frequency modules of receiving device generate according to described receiving device is carried out cycle synchronisation;
Described receiving device sends the second synchronizing signal to a plurality of sending ending equipments corresponding with described a plurality of radio-frequency modules, and described a plurality of sending ending equipments carry out cycle synchronisation according to described the second synchronizing signal and described receiving device.
The embodiment of the present invention also provides a kind of signal period synchro system, comprising: there are the receiving device a plurality of sending ending equipments corresponding with described a plurality of radio-frequency modules of a plurality of radio-frequency modules, wherein,
The first synchronizing signal that described a plurality of radio-frequency module generates according to described receiving device is carried out cycle synchronisation;
Described receiving device sends the second synchronizing signal to a plurality of sending ending equipments corresponding with described a plurality of radio-frequency modules, and described a plurality of sending ending equipments carry out cycle synchronisation according to described the second synchronizing signal and described receiving device.
Signal period synchronous method and system that the embodiment of the present invention provides, a plurality of radio-frequency modules by receiving device carry out cycle synchronisation according to the first synchronizing signal, and the second synchronizing signal that a plurality of sending ending equipments send according to receiving device is carried out cycle synchronisation, avoid the phase mutual interference of a plurality of radio-frequency modules generation when carrying out receiving and transmitting signal with a plurality of sending ending equipments of receiving device, improved the transmission performance of multiple signals transmission systems.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the schematic flow sheet of an embodiment of signal period synchronous method of the present invention;
Fig. 2 is the schematic flow sheet of signal period of the present invention another embodiment of synchronous method;
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 schematic diagram of cycle synchronisation in middle multipath reception end equipment embodiment illustrated in fig. 4;
Fig. 6 be embodiment illustrated in fig. 4 in a plurality of receiving devices carry out the schematic diagram that synchronizing signal enables;
Fig. 7 be embodiment illustrated in fig. 4 in a plurality of receiving devices and sending ending equipment carry out the schematic diagram of cycle synchronisation;
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 present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 1 is the schematic flow sheet of an embodiment of signal period synchronous method of the present invention, and as shown in Figure 1, the embodiment of the present invention comprises the steps:
The first synchronizing signal that a plurality of radio-frequency modules of step 101, receiving device generate according to receiving device is carried out cycle synchronisation;
The signal period synchronous method that the embodiment of the present invention provides, a plurality of radio-frequency modules of receiving device carry out cycle synchronisation according to the first synchronizing signal, and the second synchronizing signal that a plurality of sending ending equipments send according to receiving device is carried out cycle synchronisation, avoid the phase mutual interference of a plurality of radio-frequency modules generation when carrying out receiving and transmitting signal with a plurality of sending ending equipments of receiving device, 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 synchronous method, and as shown in Figure 2, the embodiment of the present invention comprises the steps:
In a radio-frequency module in a plurality of radio-frequency modules of step 201, receiving device, generate the first synchronizing signal;
All the other radio-frequency modules in step 202, a plurality of radio-frequency module carry out cycle synchronisation according to the first synchronizing signal;
Step 203, receiving device send answer signal as the second synchronizing signal to a plurality of sending ending equipments corresponding with a plurality of radio-frequency modules at the afterbody of each Frame;
Step 204, a plurality of sending ending equipment carry out cycle synchronisation according to the second synchronizing signal by reset cycle counter and receiving device.
In above-mentioned steps 201 and 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 the first synchronizing signal, particularly, thereby can by the counter of first radio-frequency module inside, be interrupted making first radio-frequency module by counter, export the first synchronizing signal of a frame period length, when all the other N-1 radio-frequency module receives this first synchronizing signal, the level that is triggered each radio-frequency module in (N-1) individual radio-frequency module by this first synchronizing signal changes interruption, make each radio-frequency module in the process that level change to interrupt, revise the actual value of the counter of self frame period length.(for example: at each radio-frequency module level, change in the process of interrupting, the first synchronizing signal enables all the other (N-1) individual radio-frequency modules, thereby makes the frame period Complete Synchronization of N radio-frequency module.The embodiment of the present invention only for convenience of description, be take first radio-frequency module as example describes, and does not form the restriction to the embodiment of the present invention, as long as the arbitrary radio-frequency module in a plurality of radio-frequency modules interrupts producing the first synchronizing signal according to counter, all can.
In above-mentioned steps 203 and step 204, when sending ending equipment receives the answer signal of receiving device transmission, using this answer signal as the second synchronizing signal, sending ending equipment is realized and the synchronizeing of receiving device by reset cycle counter according to this second synchronizing 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), the count range of counter within a frame period is 0～31999 (2mS/ (1/16uS)-1), suppose to calculate according to the theory of radio frequency data transmission time, time when sending ending equipment is received answer signal is 1.9mS place, and rolling counters forward value should be 30399 * (1.9mS/ (1/16uS)-1).Therefore,, when sending ending equipment is received the second synchronizing signal of receiving device transmission, the count value of counter is set to 30399; 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 synchronize, avoided disturbing due to the signal that receiving device and sending ending equipment produce because clock is asynchronous.
The signal period synchronous method that the embodiment of the present invention provides, by making a plurality of radio-frequency modules of receiving device carry out cycle synchronisation according to the first synchronizing signal, and the second synchronizing signal that a plurality of sending ending equipments send according to receiving device is carried out cycle synchronisation, avoid the phase mutual interference of a plurality of radio-frequency modules generation when carrying out receiving and transmitting signal with a plurality of sending ending equipments of receiving device, improved the transmission performance of multiple signals transmission systems.
Selectively, above-mentioned embodiment illustrated in fig. 2 in, step 201 and step 202 can be also:
In the control unit of receiving device, generate the first synchronizing signal, wherein, control unit has unique frame period counter;
A plurality of radio-frequency modules of receiving device carry out cycle synchronisation according to the 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, avoid the phase mutual interference of a plurality of radio-frequency modules generation when carrying out receiving and transmitting signal with a plurality of sending ending equipments of receiving device.
Fig. 3 is the structural representation of an embodiment of signal period synchro system of the present invention, and as shown in Figure 3, the present embodiment comprises: have the receiving device 31 of a plurality of radio-frequency modules 311 and a plurality of sending ending equipments 32 corresponding with a plurality of radio-frequency modules 311;
Wherein, the first synchronizing signal that a plurality of radio-frequency modules 311 generate according to receiving device 31 is carried out cycle synchronisation; Receiving device 31 sends the second synchronizing signal to a plurality of sending ending equipments corresponding with a plurality of radio-frequency modules 311 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 present invention provides, receiving device 31 makes a plurality of radio-frequency modules of receiving device carry out cycle synchronisation according to the first synchronizing signal by generating the first synchronizing signal, receiving device 31 sends the second synchronizing signal by a plurality of sending ending equipments 32 to corresponding with a plurality of radio-frequency modules 311 makes a plurality of sending ending equipments 32 carry out cycle synchronisation with receiving device 31, avoided the phase mutual interference of a plurality of radio-frequency modules 311 generation when carrying out receiving and transmitting signal with a plurality of sending ending equipments 32 on receiving device 31, 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 synchronous schematic diagram of middle multipath reception end equipment periodic embodiment illustrated in fig. 4, Fig. 6 be embodiment illustrated in fig. 4 in a plurality of receiving devices carry out the schematic diagram that synchronizing signal enables, Fig. 7 be embodiment illustrated in fig. 4 in a plurality of receiving devices and sending ending equipment carry out the schematic diagram of cycle synchronisation.
As shown in Figure 4, the present embodiment comprises: receiving device 41 and a plurality of sending ending equipment 42 with a plurality of radio-frequency modules 411; Wherein, the first synchronizing signal that a plurality of radio-frequency modules 411 generate according to receiving device 41 is carried out cycle synchronisation; Receiving device 41 sends the second synchronizing signal to a plurality of sending ending equipments corresponding with a plurality of radio-frequency modules 411 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 for generating the 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 sends answer signal as the second synchronizing signal for a plurality of sending ending equipments 42 to corresponding with a plurality of radio-frequency modules 411 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 the first synchronizing signal, particularly, thereby can by the counter of first radio-frequency module inside, be interrupted making first radio-frequency module by counter, export the first synchronizing signal of a frame period length, when all the other (N-1) individual radio-frequency modules receive this first synchronizing signal, the level that is triggered each radio-frequency module in (N-1) individual radio-frequency module by this first synchronizing signal changes interruption, make each radio-frequency module in the process that level change to interrupt, revise the actual value of the counter of self frame period length.For example: at each radio-frequency module, at level, change in the process of interrupting, the first synchronizing signal enables all the other (N-1) individual radio-frequency modules, thereby makes the frame period Complete Synchronization of N radio-frequency module.The embodiment of the present invention only for convenience of description, be take first radio-frequency module as example describes, and does not form the restriction to the embodiment of the present invention, as long as the arbitrary radio-frequency module in a plurality of radio-frequency modules interrupts producing the first synchronizing signal according to counter, all can.
As shown in Figure 6, the radio-frequency module that the first synchronizing signal is provided the 1st frame, the 2nd frame, the 3rd frame ..., frame period start to enable, all the other radio-frequency modules are enabled according to this first synchronizing signal, thereby guarantee the frame period Complete Synchronization of each radio-frequency module of receiving device.
As shown in Figure 7, when sending ending equipment receives the 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 M frame to sending ending equipment, sending ending equipment is realized and the synchronizeing of receiving device by reset cycle counter receiving the moment point of this answer signal (position of clock synchronous shown in Fig. 7) according to 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), the count range of counter within a frame period is 0～31999 (2mS/ (1/16uS)-1), according to the theory of radio frequency data transmission time, calculate, time in the time of can obtaining sending ending equipment and receive the second synchronizing signal is 1.9mS place, and 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, counter instantaneous value is set to 30399; 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 synchronize, avoided disturbing due to the signal that receiving device and sending ending equipment produce because clock is asynchronous.
The signal period synchro system that the embodiment of the present invention provides, receiving device 41 makes a plurality of radio-frequency modules of receiving device carry out cycle synchronisation according to the first synchronizing signal by producing the first synchronizing signal, receiving device 41 sends answer signal by a plurality of sending ending equipments 42 to corresponding with a plurality of radio-frequency modules 411 makes a plurality of sending ending equipments and receiving device carry out cycle synchronisation as the second synchronizing signal, the phase mutual interference of having avoided a plurality of radio-frequency modules on 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, the 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, the first synchronizing signal that a plurality of radio-frequency modules 811 generate according to receiving device 81 is carried out cycle synchronisation; Receiving device 81 sends the second synchronizing signal to a plurality of sending ending equipments corresponding with a plurality of radio-frequency modules 811 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 for generating the 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, the first synchronizing signal can be both the periodic signal that utilizes clock pulse to generate between control unit 812 and a plurality of radio-frequency module 811, can be also by control unit 812, by digital interface, to a plurality of radio-frequency modules 811, sent for synchronous control command performance period; Certainly, periodic signal and control command are only the example of the embodiment of the present invention, do not form the restriction to the embodiment of the present invention, as long as that can generate by control unit and make a plurality of radio-frequency modules can carry out signal or the instruction of cycle synchronisation, be the first synchronizing signal described in the embodiment of the present 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, are phase mutually synchronization thereby make the frame transmission cycle of a plurality of radio-frequency modules 811.
Wherein, radio-frequency module 811 can be specifically the radio frequency transceiver that function is relatively single, and the control signal that the operation of radio frequency sending and receiving is inputted by outside determines.
In the invention described above embodiment, receiving device is specifically as follows receiving device, and sending ending equipment is specifically as follows microphone, between receiving device and microphone, by wireless transmission link, communicates.
One of ordinary skill in the art will appreciate that: all or part of step that realizes above-described embodiment can complete by the relevant hardware of program command, aforesaid program can be stored in a microcontroller read/write memory medium, this program, when carrying out, is carried out the step that comprises said method embodiment.
Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (8)
1. a signal period synchronous method, is characterized in that, comprising:
The first synchronizing signal that a plurality of radio-frequency modules of receiving device generate according to described receiving device is carried out cycle synchronisation;
Described receiving device sends the second synchronizing signal to a plurality of sending ending equipments corresponding with described a plurality of radio-frequency modules;
Described a plurality of sending ending equipment carries out cycle synchronisation according to described the second synchronizing signal and described receiving device.
2. method according to claim 1, is characterized in that, the 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 the first synchronizing signal;
All the other radio-frequency modules in described a plurality of radio-frequency module carry out cycle synchronisation according to described the first synchronizing signal.
3. method according to claim 1, is characterized in that, the 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 the first synchronizing signal;
A plurality of radio-frequency modules of described receiving device carry out cycle synchronisation according to described the first synchronizing signal.
4. according to the arbitrary described method of claim 1～3, it is characterized in that, described receiving device sends the second synchronizing signal to a plurality of sending ending equipments corresponding with described a plurality of radio-frequency modules, and described a plurality of sending ending equipments carry out cycle synchronisation according to described the second synchronizing signal and described receiving device and comprise:
Described receiving device sends answer signal as the second synchronizing signal to a plurality of sending ending equipments corresponding with 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 the second synchronizing signal by reset cycle counter and described receiving device.
5. a signal period synchro system, is characterized in that, comprising: there are the receiving device of a plurality of radio-frequency modules and a plurality of sending ending equipments corresponding with described a plurality of radio-frequency modules,
The first synchronizing signal that described a plurality of radio-frequency module generates according to described receiving device is carried out cycle synchronisation;
Described receiving device sends the second synchronizing signal to a plurality of sending ending equipments corresponding with described a plurality of radio-frequency modules, and described a plurality of sending ending equipments carry out cycle synchronisation according to described the 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 for generating the first synchronizing signal;
All the other radio-frequency modules in described a plurality of radio-frequency module carry out cycle synchronisation according to described the 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 for generating the first synchronizing signal;
A plurality of radio-frequency modules of described receiving device carry out cycle synchronisation according to described the first synchronizing signal.
8. according to the arbitrary described system of claim 5～7, it is characterized in that,
Described receiving device also sends answer signal as the second synchronizing signal for a plurality of sending ending equipments to corresponding with 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 the second synchronizing signal by reset cycle counter and described receiving device.
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