CN101882947B - Non-time difference limited frequency hopping synchronization method - Google Patents
Non-time difference limited frequency hopping synchronization method Download PDFInfo
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- CN101882947B CN101882947B CN 201010155785 CN201010155785A CN101882947B CN 101882947 B CN101882947 B CN 101882947B CN 201010155785 CN201010155785 CN 201010155785 CN 201010155785 A CN201010155785 A CN 201010155785A CN 101882947 B CN101882947 B CN 101882947B
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Abstract
The invention discloses a non-time difference limited frequency hopping synchronization method. The method comprises the following steps that: a synchronization initiator sends initial synchronization sequences, namely non-time difference requirement synchronization information sent by a first frequency point, large range time difference correction synchronization information sent by a second frequency point, small range time difference correction synchronization information sent by a third frequency point and accurate TOD synchronization information sent by a fourth frequency point; and a synchronization searcher cyclically searches the synchronization information at the second frequency point and the third frequency point in turn, judges the time difference range against the synchronization initiator according to the different types of received synchronization information and finally realizes the TOD clock synchronization with the synchronization initiator by a synchronization process. In the method, the time difference between a transmitter and a receiver is not limited, and the transmitter and the receiver can both realize the frequency hopping synchronization; according to different time differences, different synchronization routes are automatically selected, and the synchronization is realized gradually and step by step; and the use requirement on a high-accuracy real-time clock is greatly lowered.
Description
Technical field
The present invention relates to frequency hopping radio set, especially relate to a kind of non-time difference limited frequency hopping synchronization method of frequency hopping radio set.
Background technology
The tradition frequency hopping radio set generally adopts the synchronous technology such as self-synchronizing method or synchronous prefix method, when antijamming capability is provided, be subject to receiving and dispatching two restrictions of sending out the maximum time difference, namely only when debit's radio station local clock and the originating party radio station local clock time difference are not more than certain special time unit, just may provide the frequency hopping synchronization mechanism, make both sides set up communication.
Summary of the invention
The purpose of this invention is to provide a kind of the transmitting-receiving and be not subjected to time difference restriction all can reach the synchronous non-time difference limited frequency hopping synchronization method of frequency hopping between the radio station, thereby improved the frequency hopping radio set net synchronization capability, reduced the requirement of radio station to the accurate real-time clock (RTC) in inside.
In order to achieve the above object, the present invention adopts following technical scheme: a kind of non-time difference limited frequency hopping synchronization method, carry out as follows:
(1), synchronously the initiator sends initial synchronization sequence, is respectively the synchronizing information of TEC time error correction on a large scale without time difference requirement synchronizing information, the second frequency transmission, the synchronizing information of TEC time error correction among a small circle of the 3rd frequency transmission and the accurate T OD synchronizing information of the 4th frequency transmission that the first frequency sends;
(2), synchronous searcher is successively in the second frequency and the 3rd frequency cocycle search synchronizing information, according to the dissimilar synchronizing information judgement of receiving with synchronize initiator's time difference range, finally reach TOD clock synchronous with the initiator by synchronizing process.
Described synchronizing process is to provide three kinds of different synchronous paths according to time difference size:
Synchronous path one: when the time difference during more than or equal to the first special time, receive with jumper connection by the motor synchronizing information that the first frequency carries in the debit radio station, local clock is synchronizeed with the originating party radio station to above-mentioned the first special time 1/2nd in, enter synchronous path two and carry out next step search synchronizing process.
Synchronous path two: less than the first special time during more than or equal to the second special time, the debit radio station can be first by the mode described in synchronous path one when the time difference, local clock is synchronizeed with the originating party radio station above-mentioned the first special time extremely 1/2nd in; Or directly receive with jumper connection by the synchronous prefix of the second frequency transmission, with in local clock and originating party radio station clock synchronous to the three special times, enter synchronous path three and carry out next step and search for synchronizing process.
Synchronous path three: when the time difference during less than the second special time, the debit radio station can be first through the mode described in synchronous path two, local clock is synchronizeed to the 3rd special time with the originating party radio station; Or directly receive with jumper connection by the synchronous prefix of the 3rd frequency transmission, and continue and receive with jumper connection the information of transmitting on the 4th frequency, with both sides' clock complete matching, reach the synchronous purpose of time synchronized and frequency.
Beneficial effect of the present invention and advantage:
(1), the transmitting-receiving radio station between the time difference unrestricted, all can reach frequency hopping synchronous;
(2), according to the different time differences, automatically choose different synchronous paths, successively synchronous step by step;
(3), greatly reduce instructions for use to high-precision quasi real time clock;
(2) this method adopts self-synchronizing method and synchronizes the prefix method and combine, and a kind of receiving-transmitting sides synchronous method of the radio station local clock maximum time difference that is not subject to is provided.Improve the frequency hopping radio set net synchronization capability, reduced the requirement of radio station to the accurate real-time clock (RTC) in inside.
Description of drawings
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein:
Fig. 1 is that the present invention receives and dispatches the radio station when being in different time difference range, the stage method for synchronizing time and the synchronous path that adopt.
Embodiment
Disclosed all features in this specification, or the step in disclosed all methods or process except mutually exclusive feature and/or step, all can make up by any way.
Disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or similar characteristics.
Clearer for the present invention is described, the present invention is set forth as follows:
(1) utilize the TOD temporal information, produce the synchronous frequency of changing according to the different time interval by pseudo-random sequence generator, be defined as 18 AF frequencies, 3 SF frequencies, 6 FF frequencies and 9 MF frequencies; The AF frequency is defined as the first frequency, and the SF frequency is defined as the second frequency, and the FF frequency is defined as the 3rd frequency, and the MF frequency is the 4th frequency.
(2) synchronously the initiator sends 250 and jumps initial synchronization sequence, is respectively the synchronizing information of TEC time error correction on a large scale without time difference requirement synchronizing information, the transmission of SF frequency, the synchronizing information of TEC time error correction among a small circle of FF frequency transmission and the accurate T OD synchronizing information that the MF frequency sends that the AF frequency sends;
(3) synchronous searcher is successively in 3 SF frequencies and 6 FF frequency cocycle search synchronizing informations, according to the dissimilar synchronizing information judgement of receiving with synchronize initiator's time difference range, and successively progressively approach synchronous initiator TOD clock (synchronizing process), finally reach the TOD clock synchronous with the initiator.Both sides reach the precondition of carrying out next step data communication---and time, frequency are synchronous.
As Fig. 1, synchronizing process of the present invention is described below:
This synchronous method adopts 18 AF frequencies, 3 SF frequencies, 6 FF frequencies and 9 the MF frequencies according to different time interval replacing, sends 250 and jump synchronizing informations on above frequency, provides three kinds of different synchronous paths according to time difference size:
synchronous path one: when the time difference during more than or equal to the first special time (the first special time is as being 64 minutes or other set point), receive with jumper connection by the motor synchronizing information that the AF frequency carries in the debit radio station, local clock is synchronizeed with the originating party radio station to above-mentioned the first special time 1/2nd (if the first special time is 64 minutes, receive with jumper connection by the motor synchronizing information that the AF frequency carries in debit's this moment radio station, local clock is synchronizeed to 32 minutes with the originating party radio station, if other set point, receive with jumper connection by the motor synchronizing information that the AF frequency carries in debit's this moment radio station, local clock is synchronizeed with the originating party radio station to set point 1/2nd) in, enter synchronous path two and carry out next step search synchronizing process.
synchronous path two: when the time difference less than the first special time (the first special time is as being 64 minutes or other set point) during more than or equal to the second special time (the second special time is as being 2.66 minutes or other set point), the debit radio station can be first by the mode described in synchronous path one, local clock is synchronizeed with the originating party radio station to above-mentioned the first special time 1/2nd (if the first special time is 64 minutes, receive with jumper connection by the motor synchronizing information that the AF frequency carries in debit's this moment radio station, local clock is synchronizeed to 32 minutes with the originating party radio station, if other set point, receive with jumper connection by the motor synchronizing information that the AF frequency carries in debit's this moment radio station, local clock is synchronizeed with the originating party radio station to set point 1/2nd) in, also can directly receive with jumper connection by the synchronous prefix of SF frequency transmission, in local clock and originating party radio station clock synchronous to the three special times (the 3rd special time is 32 seconds or other set point), enter synchronous path three and carry out next step search synchronizing process.
Synchronous path three: when the time difference during less than the second special time (the second special time is as being 2.66 minutes or other set point), the debit radio station can be first through the mode described in synchronous path two, local clock is synchronizeed to the 3rd special time (the 3rd special time is 32 seconds or other set point) with the originating party radio station; Also can directly receive with jumper connection by the synchronous prefix of FF frequency transmission, and continue to receive with jumper connection the information of transmitting on the MF frequency, with both sides' clock complete matching, reach the synchronous purpose of time synchronized and frequency.
The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.
Claims (1)
1. non-time difference limited frequency hopping synchronization method is characterized in that: carry out as follows:
(1), synchronous initiator sends initial synchronization sequence, be respectively that the first frequency sends without time difference requirement
The accurate T OD synchronizing information that the synchronizing information of TEC time error correction among a small circle that the synchronizing information of TEC time error correction on a large scale that synchronizing information, the second frequency send, the 3rd frequency send and the 4th frequency send;
(2), synchronous searcher is successively in the second frequency and the 3rd frequency cocycle search synchronizing information, according to the dissimilar synchronizing information judgement of receiving with synchronize initiator's time difference range, finally reach TOD clock synchronous with the initiator by synchronizing process;
Described synchronizing process is to provide three kinds of different synchronous paths according to time difference size:
Synchronous path one: when the time difference during more than or equal to the first special time, receive with jumper connection by the motor synchronizing information that the first frequency carries in the debit radio station, local clock is synchronizeed with the originating party radio station to above-mentioned the first special time 1/2nd in, enter synchronous path two and carry out next step search synchronizing process;
Synchronous path two: less than the first special time during more than or equal to the second special time, the debit radio station can be first by the mode described in synchronous path one when the time difference, local clock is synchronizeed with the originating party radio station above-mentioned the first special time extremely 1/2nd in; Or directly receive with jumper connection by the synchronous prefix of the second frequency transmission, with in local clock and originating party radio station clock synchronous to the three special times, enter synchronous path three and carry out next step and search for synchronizing process;
Synchronous path three: when the time difference during less than the second special time, the debit radio station can be first through the mode described in synchronous path two, local clock is synchronizeed to the 3rd special time with the originating party radio station; Or directly receive with jumper connection by the synchronous prefix of the 3rd frequency transmission, and continue and receive with jumper connection the information of transmitting on the 4th frequency, with both sides' clock complete matching, reach the synchronous purpose of time synchronized and frequency.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0896442A1 (en) * | 1996-12-26 | 1999-02-10 | Ntt Mobile Communications Network Inc. | Frame transmitter-receiver |
| CN101222314A (en) * | 2007-12-05 | 2008-07-16 | 电子科技大学 | Method for amending long-distance sampling system clock period error |
| CN101626268A (en) * | 2009-08-12 | 2010-01-13 | 广州海格通信集团股份有限公司 | Realizing method for synchronizing high-speed frequency hopping of narrowband |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3040319B2 (en) * | 1994-10-14 | 2000-05-15 | 忠光 入谷 | Frequency synthesizer |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0896442A1 (en) * | 1996-12-26 | 1999-02-10 | Ntt Mobile Communications Network Inc. | Frame transmitter-receiver |
| CN101222314A (en) * | 2007-12-05 | 2008-07-16 | 电子科技大学 | Method for amending long-distance sampling system clock period error |
| CN101626268A (en) * | 2009-08-12 | 2010-01-13 | 广州海格通信集团股份有限公司 | Realizing method for synchronizing high-speed frequency hopping of narrowband |
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| Title |
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| JP特开平8-116255A 1996.05.07 |
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Effective date of registration: 20161128 Address after: 610207 Sichuan Chengdu Shuangliu Economic Development Zone Industrial Zone, Shuangliu District, Sichuan Province Patentee after: CHINA ELECTRONIC TECHNOLOGY CYBER SECURITY CO., LTD. Address before: 610041, No. 6, pioneering Road, hi tech Zone, Sichuan, Chengdu Patentee before: No.30 Inst., China Electronic Science & Technology Group Corp. |