CN103138798A - Pseudo-noise (PN) code bothway sliding capturing method - Google Patents
Pseudo-noise (PN) code bothway sliding capturing method Download PDFInfo
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- CN103138798A CN103138798A CN 201110447561 CN201110447561A CN103138798A CN 103138798 A CN103138798 A CN 103138798A CN 201110447561 CN201110447561 CN 201110447561 CN 201110447561 A CN201110447561 A CN 201110447561A CN 103138798 A CN103138798 A CN 103138798A
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Abstract
The invention belongs to the technical field of communication, and particularly relates to a pseudo-noise (PN) code bothway sliding capturing method. According to the PN code bothway sliding capturing method, a PN code generated by a PN code generator is divided into two paths, the phase of one path slides in an advancing mode continuously, and the phase of the other one path slides in a lagging mode continuously. The PN code bothway sliding capturing method improves time characteristics of PN code capturing, and well resolves conflicts between hardware investment and the capturing time characteristics.
Description
The present invention's " PN code Bidirectional slide prize law " belongs to communication technical field, is specifically related to " PN code Bidirectional slide prize law ".
The PN code, namely pseudo noise code, be the widely used a kind of coding of wireless communication field, is mainly used to the digital signal that transmits is carried out spread spectrum and despreading.Thereby making communication have very strong antijamming capability, very strong disguised and anti-fading ability, also can utilize this technology to realize code division multiple access, direction finding and location etc.
About Pseudo-random code capture, two kinds of basic Acquisition Scheme are arranged: parallel capture and serial acquisition.The time response of parallel capture is good, but hardware has high input; And the less investment of serial acquisition hardware, but time response is poor.Concrete methods of realizing has sliding correlation detector prize law (being the Sequence Detection prize law), matched filter serial acquisition method etc., wherein, the sliding correlation detector prize law has again simple integral slip prize law, double integrator slip prize law, K integration slip prize law etc.But, all can not solve well hardware and drop into contradiction with the capture time characteristic.
The purpose of PN code Bidirectional slide prize law of the present invention is to overcome the prior art shortcoming, proposes a kind of PN code Bidirectional slide prize law, and this method has improved the time response that the PN code is caught, and has solved preferably the contradiction of hardware input with the capture time characteristic.
The purpose of PN code Bidirectional slide prize law of the present invention is achieved in that this invention " PN code Bidirectional slide prize law " is divided into two-way with the PN code that local PN code generator produces, one tunnel phase place is leading the slip constantly, the slip that constantly lags behind of one tunnel phase place, every slip once, carry out a coherent detection, when having one tunnel coherent detection to be "True", namely realized catching.
The feature of the described method of PN code Bidirectional slide prize law of the present invention is: the PN code that the PN code generator produces is divided into two-way, and one tunnel phase place is leading the slip constantly, the slip that constantly lags behind of one tunnel phase place.
The advantage of PN code Bidirectional slide prize law of the present invention is: improved the time response that the PN code is caught, solved preferably the contradiction of hardware input with the capture time characteristic.
Below in conjunction with accompanying drawing, PN code Bidirectional slide prize law of the present invention is further described:
Fig. 1 is the Bidirectional slide coding capture systems schematic diagram of PN code Bidirectional slide prize law of the present invention.
Fig. 2 is the Bidirectional slide catching method explanation of PN code Bidirectional slide prize law of the present invention.
Fig. 3 is the two-way double integrator slip of PN code Bidirectional slide prize law of the present invention coding capture systems schematic diagram.
Fig. 4 is two-way K the integration slip coding capture systems schematic diagram of PN code Bidirectional slide prize law of the present invention.
Consult Fig. 1, the present invention's " PN code Bidirectional slide prize law " be exactly in the output adjunction of local PN code generator a gradual phase splitter, this phase splitter is divided into two-way with the PN code that local PN code generator produces, and one tunnel phase place is leading the slip constantly, the slip that constantly lags behind of one tunnel phase place.
Consult Fig. 2, the two-way PN code in the present invention's " PN code Bidirectional slide prize law " is leading to slide and lags behind when sliding, and 1/2chip slides at every turn.
Consult Fig. 3, the present invention's " PN code Bidirectional slide prize law " be exactly on double integrator slides the coding capture systems adjunction a gradual phase splitter, this phase splitter is divided into two-way with the PN code that local PN code generator produces, one tunnel phase place is leading the slip constantly, the slip that constantly lags behind of one tunnel phase place, thus consisted of the two-way double integrator coding capture systems that slides.
Consult Fig. 4, the present invention's " PN code Bidirectional slide prize law " be exactly on K integration slides the coding capture systems adjunction a gradual phase splitter, this phase splitter is divided into two-way with the PN code that local PN code generator produces, one tunnel phase place is leading the slip constantly, the slip that constantly lags behind of one tunnel phase place, thus consisted of two-way K the integration coding capture systems that slides.
Claims (3)
1. PN code Bidirectional slide prize law of the present invention is characterized in that: the PN code that the PN code generator produces is divided into two-way, and one tunnel phase place is leading the slip constantly, the slip that constantly lags behind of one tunnel phase place.
2. PN code Bidirectional slide prize law according to claim 1 is characterized in that: described K integration slided on the coding capture systems adjunction gradual phase splitter.
3. PN code Bidirectional slide prize law according to claim 1 is characterized in that: the two-way PN code that described PN code generator produces is leading to slide and lags behind when sliding, and 1/2chip slides at every turn.
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| CN 201110447561 CN103138798A (en) | 2011-11-29 | 2011-11-29 | Pseudo-noise (PN) code bothway sliding capturing method |
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| CN 201110447561 CN103138798A (en) | 2011-11-29 | 2011-11-29 | Pseudo-noise (PN) code bothway sliding capturing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104639206A (en) * | 2013-11-15 | 2015-05-20 | 财团法人资讯工业策进会 | Synchronization device and synchronization method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104639206A (en) * | 2013-11-15 | 2015-05-20 | 财团法人资讯工业策进会 | Synchronization device and synchronization method |
| CN104639206B (en) * | 2013-11-15 | 2017-09-15 | 财团法人资讯工业策进会 | Sychronisation and its synchronous method |
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Application publication date: 20130605 |