CN108471392B - It is a kind of based on the msk signal demodulation method adjudicated in advance and system - Google Patents
It is a kind of based on the msk signal demodulation method adjudicated in advance and system Download PDFInfo
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- CN108471392B CN108471392B CN201810141684.5A CN201810141684A CN108471392B CN 108471392 B CN108471392 B CN 108471392B CN 201810141684 A CN201810141684 A CN 201810141684A CN 108471392 B CN108471392 B CN 108471392B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
- H04L27/14—Demodulator circuits; Receiver circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
Abstract
The present invention provides a kind of based on the msk signal demodulation method adjudicated in advance and system, which comprises obtains the pre- court verdict of msk signal to be demodulated；According to the pre- judgement as a result, filtering out multiple local template signals；Based on the multiple local template signals filtered out, the final judging result of the msk signal to be demodulated is obtained.It is provided by the invention based on the msk signal demodulation method adjudicated in advance and system, by being adjudicated in advance msk signal, and suitable local template signal is selected according to pre- court verdict, msk signal is demodulated based on multiple symbol differential detection algorithm again, improve bit error rate performance, its resource occupation of multiple symbol differential detection is reduced, the complexity of system is reduced.
Description
Technical field
The present invention relates to digital signal processing technique fields more particularly to a kind of based on the msk signal demodulation side adjudicated in advance
Method and system.
Background technique
The demodulating algorithm of minimum frequency shift keying (MSK) signal is the core group in the wireless communication system using MSK modulation
At part, the detectability of the demodulating algorithm of MSK directly determines the performance of system.
In the prior art, the demodulation of msk signal is generallyd use in the case where considering implementation complexity to carrier wave
Synchronize non-coherent demodulation mode of less demanding.Existing non-coherent demodulation algorithm can generally be divided into demodulating algorithm symbol-by-symbol
With more symbol demodulation algorithms.Demodulating algorithm is realized simple symbol-by-symbol, and commonly demodulating algorithm includes incoherent envelope inspection symbol-by-symbol
Wave, 1bit differential ference spiral etc..More symbol demodulation algorithms have preferable bit error rate performance, and common more symbol demodulation algorithms include more
Symbol Differential Detection (Multiple-symbol differential detection, MSDD) algorithm etc..
But the bit error rate performance of demodulating algorithm symbol-by-symbol in the prior art is poor；More symbol demodulation algorithms are due to every
Secondary judgement requires carry out 2NThe search of a template, very high for the implementation complexity requirement of system, this is nothing in practical application
What method received.
Summary of the invention
The object of the present invention is to provide a kind of based on the msk signal demodulation method adjudicated in advance and system, solves existing skill
The technical issues of bit error rate that MSK is demodulated in art is high, system complex.
In order to solve the above-mentioned technical problem, on the one hand, the present invention provides a kind of based on the msk signal demodulation side adjudicated in advance
Method, comprising:
Obtain the pre- court verdict of msk signal to be demodulated；
According to the pre- judgement as a result, filtering out multiple local template signals；
Based on the multiple local template signals filtered out, the final judging result of the msk signal to be demodulated is obtained.
Further, described based on the multiple local template signals filtered out, obtain the final of the msk signal to be demodulated
Court verdict, specifically:
Each local template signal is multiplied with the msk signal to be demodulated after delay preset time respectively, is obtained more
A multiplied result；
Each multiplied result is integrated, multiple integral results are obtained；
Envelope detection is carried out to each integral result, obtains multiple envelope detection values；
According to local template signal corresponding to maximum envelope detection value, the final of the msk signal to be demodulated is determined
Court verdict.
Further, the pre- judgement for obtaining msk signal to be demodulated as a result, specifically:
The pre- court verdict of the msk signal to be demodulated is obtained based on demodulating algorithm symbol-by-symbol.
Further, the pre- judgement for obtaining msk signal to be demodulated as a result, specifically:
The pre- court verdict of the msk signal to be demodulated is obtained based on a bit Differential demodulation algorithm.
Further, before the pre- court verdict for obtaining msk signal to be demodulated, further includes:
Msk signal to be demodulated is divided into two-way, to wherein being adjudicated in advance all the way, in addition postponing all the way.
On the other hand, the present invention provides a kind of based on the msk signal demodulating system adjudicated in advance, comprising:
Pre- decision device module, for obtaining the pre- court verdict of msk signal to be demodulated；
Template filter device module, for according to the pre- judgement as a result, filtering out multiple local template signals；
Multiple symbol differential detection device module, for obtaining described to be demodulated based on the multiple local template signals filtered out
The final judging result of msk signal.
Further, the multiple symbol differential detection module includes:
Delayer submodule, for postponing according to preset time to the msk signal to be demodulated
Multiplier submodule, for by each local template signal respectively with the msk signal phase to be demodulated after delay
Multiply, obtains multiple multiplied results；
Integrator submodule obtains multiple integral results for integrating to each multiplied result；
Envelope detector submodule obtains multiple envelope detection values for carrying out envelope detection to each integral result；
Decision device submodule, for the local template signal according to corresponding to maximum envelope detection value, determine it is described to
Demodulate the final judging result of msk signal.
In another aspect, the present invention provides a kind of electronic equipment for msk signal demodulation, comprising:
Memory and processor, the processor and the memory complete mutual communication by bus；It is described to deposit
Reservoir is stored with the program instruction that can be executed by the processor, and it is above-mentioned that the processor calls described program instruction to be able to carry out
Method.
Another aspect, the present invention provide a kind of computer program product, and the computer program product is non-including being stored in
Computer program in transitory computer readable storage medium, the computer program include program instruction, when described program refers to
When order is computer-executed, the computer is made to execute above-mentioned method.
Another aspect, the present invention provide a kind of computer readable storage medium, are stored thereon with computer program, the meter
Calculation machine program realizes above-mentioned method when being executed by processor.
It is provided by the invention based on the msk signal demodulation method adjudicated in advance and system, by being prejudged to msk signal
Certainly, and according to pre- court verdict suitable local template signal is selected, then based on multiple symbol differential detection algorithm to msk signal solution
It adjusts, improves bit error rate performance, reduce its resource occupation of multiple symbol differential detection, reduce the complexity of system.
Detailed description of the invention
Fig. 1 is according to the embodiment of the present invention based on the msk signal demodulation method schematic diagram adjudicated in advance；
Fig. 2 is according to the embodiment of the present invention based on the msk signal demodulating system schematic diagram adjudicated in advance；
Fig. 3 is the structural schematic diagram of the electronic equipment provided in an embodiment of the present invention for msk signal demodulation.
Specific embodiment
In order to keep the purposes, technical schemes and advantages of the embodiment of the present invention clearer, implement below in conjunction with the present invention
Attached drawing in example, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment
It is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiment of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Fig. 1 is according to the embodiment of the present invention based on the msk signal demodulation method schematic diagram adjudicated in advance, as shown in Figure 1, this
Inventive embodiments provide a kind of based on the msk signal demodulation method adjudicated in advance, comprising:
Step S10, the pre- court verdict of msk signal to be demodulated is obtained；
Step S20, according to the pre- judgement as a result, filtering out multiple local template signals；
Step S30, based on the multiple local template signals filtered out, the conclusive judgement of the msk signal to be demodulated is obtained
As a result.
Specifically, msk signal to be demodulated is divided into two-way first, first via msk signal to be demodulated is adjudicated in advance, is obtained
To the pre- court verdict of one group of transmission information.For example, in the system that a watch window is 7bit, one group of anticipation remembering
Certainly the result is that bpre, bpre=[b1 b2 b3 b4 b5 b6 b7], wherein b4It is the symbol to be adjudicated of subsequent calculating, it is assumed that this group
The erroneous judgement only existed in other results adjudicated in advance less equal than 1 symbol is determined.
Then, according to pre- judgement as a result, filtering out multiple local template signals.It selects similar in one group and pre- court verdict
Output result of the local template signal as screening module.The result b adjudicated in advance for one group obtained in upper examplepre, pass through
Screening obtains 14 local template signals, as follows respectively:
s0(1)=[b1 b2 b3 0 b5 b6 b7]
s1(1)=[b1 b2 b3 1 b5 b6 b7]
Finally, using multiple symbol differential detection algorithm, being obtained described wait solve based on the multiple local template signals filtered out
Adjust the final judging result of msk signal.
By taking MSDD algorithm as an example, in the system that a watch window is 7bit, need to select 2 using MSDD algorithm7It is a
Local template signal.Compared with the prior art, demodulation method provided in an embodiment of the present invention can effectively reduce local template
The use of signal, and then reduce the complexity of system.According to pre- judgement as a result, only filtering out in 14 that local template signal can be complete
At the demodulation of msk signal.
It is provided by the invention based on the msk signal demodulation method adjudicated in advance, by being adjudicated in advance msk signal, and root
Suitable local template signal is selected according to pre- court verdict, then msk signal is demodulated based on multiple symbol differential detection algorithm, is improved
Bit error rate performance reduces its resource occupation of multiple symbol differential detection, reduces the complexity of system.
On the basis of the above embodiments, further, described based on the multiple local template signals filtered out, obtain institute
The final judging result of msk signal to be demodulated is stated, specifically:
Each local template signal is multiplied with the msk signal to be demodulated after delay preset time respectively, is obtained more
A multiplied result；
Each multiplied result is integrated, multiple integral results are obtained；
Envelope detection is carried out to each integral result, obtains multiple envelope detection values；
According to local template signal corresponding to maximum envelope detection value, the final of the msk signal to be demodulated is determined
Court verdict.
Specifically, based on the multiple local template signals filtered out, using multiple symbol differential detection algorithm, obtain it is described to
The detailed process for demodulating the final judging result of msk signal is as follows:
In order to reserve the enough calculating time to screen local template signal, need to the second road msk signal to be demodulated into
Row delay disposal.The preset time of delay is determined according to the actual conditions of system.
After obtaining the local template signal after screening, the MSK to be demodulated of the second road Jing Guo time delay is believed
Multiplication calculating is carried out with each local template signal number respectively, obtains multiple multiplied results.The sheet for needing exist for and filtering out
The identical multiplier of the number of ground template signal, the step after multiplication calculates are also required to multidiameter delay calculating.
Then, each multiplied result is integrated, obtains multiple integral results.The time of integration is the integer of symbol period
Times, the integral beginning and ending time here needs to be determined according to bit synchronization information.During algorithm is realized, integral operation will be converted
For summation, i.e., add up to multiplied result.By taking the example in above-described embodiment as an example, it is for 7bit in a watch window
In system, the cumulative time is 7 symbol periods.
Then, then to each integral result carry out envelope detection, that is, defeated integrating each to integral result modulus square
It is added after the real and imaginary parts square of signal out, obtains multiple envelope detection values.By taking the example in above-described embodiment as an example,
In the system that one watch window is 7bit, 14 local template signals are obtained, in this step, one is obtained 14 envelope inspections
Wave number.
Finally, the local template signal according to corresponding to maximum envelope detection value, determines the final of msk signal to be demodulated
Court verdict.Judgement, decision device maximum value after determining relatively will be compared from all envelope detection values obtained in multichannel
Place all the way after, can corresponding local template signal determines the court verdict of current sign all the way according to this.With above-mentioned reality
For applying the example in example, in the system that a watch window is 7bit, one is selected from 14 obtained envelope detection values
Maximum value, the intermediate symbols value that largest enveloping detection is worth corresponding local template signal is final court verdict.
It is provided by the invention based on the msk signal demodulation method adjudicated in advance, by being adjudicated in advance msk signal, and root
Suitable local template signal is selected according to pre- court verdict, then msk signal is demodulated based on multiple symbol differential detection algorithm, is improved
Bit error rate performance reduces its resource occupation of multiple symbol differential detection, reduces the complexity of system.
On the basis of the above various embodiments, further, the pre- judgement for obtaining msk signal to be demodulated is as a result, tool
Body are as follows:
The pre- court verdict of the msk signal to be demodulated is obtained based on demodulating algorithm symbol-by-symbol.
Specifically, when adjudicated in advance first via msk signal to be demodulated, since the performance adjudicated in advance will not significantly affect
To the bit error rate performance of the demodulation method of the embodiment of the present invention, it is possible to use the lower demodulation side symbol-by-symbol of implementation complexity
Method obtain pre- judgement as a result, to reduce the complexity of whole system.
It is provided by the invention based on the msk signal demodulation method adjudicated in advance, by being adjudicated in advance msk signal, and root
Suitable local template signal is selected according to pre- court verdict, then msk signal is demodulated based on multiple symbol differential detection algorithm, is improved
Bit error rate performance reduces its resource occupation of multiple symbol differential detection, reduces the complexity of system.
On the basis of the above various embodiments, further, the pre- judgement for obtaining msk signal to be demodulated is as a result, tool
Body are as follows:
The pre- court verdict of the msk signal to be demodulated is obtained based on a bit Differential demodulation algorithm.
Specifically, when adjudicated in advance first via msk signal to be demodulated, since the performance adjudicated in advance will not significantly affect
To the bit error rate performance of the demodulation method of the embodiment of the present invention, it is possible to use the lower 1bit differential ference spiral of implementation complexity
Method obtain pre- judgement as a result, to reduce the complexity of whole system.
It is provided by the invention based on the msk signal demodulation method adjudicated in advance, by being adjudicated in advance msk signal, and root
Suitable local template signal is selected according to pre- court verdict, then msk signal is demodulated based on multiple symbol differential detection algorithm, is improved
Bit error rate performance reduces its resource occupation of multiple symbol differential detection, reduces the complexity of system.
Fig. 2 is according to the embodiment of the present invention based on the msk signal demodulating system schematic diagram adjudicated in advance, as shown in Fig. 2, this
Inventive embodiments provide a kind of based on the msk signal demodulating system adjudicated in advance, including pre- decision device module 10, template filter device mould
Block 20 and multiple symbol differential detection device module 30, wherein pre- decision device module 10 is used to obtain the pre- judgement of msk signal to be demodulated
As a result.
Template filter device module 20 is used for according to the pre- judgement as a result, filtering out multiple local template signals.
Multiple symbol differential detection device module 30 is used to obtain described to be demodulated based on the multiple local template signals filtered out
The final judging result of msk signal.
Specifically, the embodiment of the present invention provide it is a kind of based on the msk signal demodulating system adjudicated in advance, for completing above-mentioned reality
Method described in example is applied, the demodulating system provided through this embodiment completes the specific step of method described in above-described embodiment
Rapid same as the previously described embodiments, details are not described herein again.
It is provided by the invention based on the msk signal demodulating system adjudicated in advance, by being adjudicated in advance msk signal, and root
Suitable local template signal is selected according to pre- court verdict, then msk signal is demodulated based on multiple symbol differential detection algorithm, is improved
Bit error rate performance reduces its resource occupation of multiple symbol differential detection, reduces the complexity of system.
On the basis of the above embodiments, further, the multiple symbol differential detection module includes:
Delayer submodule, for postponing according to preset time to the msk signal to be demodulated
Multiplier submodule, for by each local template signal respectively with the msk signal phase to be demodulated after delay
Multiply, obtains multiple multiplied results；
Integrator submodule obtains multiple integral results for integrating to each multiplied result；
Envelope detector submodule obtains multiple envelope detection values for carrying out envelope detection to each integral result；
Decision device submodule, for the local template signal according to corresponding to maximum envelope detection value, determine it is described to
Demodulate the final judging result of msk signal.
Specifically, the embodiment of the present invention provide it is a kind of based on the msk signal demodulating system adjudicated in advance, for completing above-mentioned reality
Method described in example is applied, the demodulating system provided through this embodiment completes the specific step of method described in above-described embodiment
Rapid same as the previously described embodiments, details are not described herein again.
It is provided by the invention based on the msk signal demodulating system adjudicated in advance, by being adjudicated in advance msk signal, and root
Suitable local template signal is selected according to pre- court verdict, then msk signal is demodulated based on multiple symbol differential detection algorithm, is improved
Bit error rate performance reduces its resource occupation of multiple symbol differential detection, reduces the complexity of system.
Fig. 3 is the structural schematic diagram of the electronic equipment provided in an embodiment of the present invention for msk signal demodulation, such as Fig. 3 institute
Show, the equipment includes: processor 801, memory 802 and bus 803；
Wherein, processor 801 and memory 802 complete mutual communication by the bus 803；
Processor 801 is used to call the program instruction in memory 802, to execute provided by above-mentioned each method embodiment
Method, for example,
Obtain the pre- court verdict of msk signal to be demodulated；
According to the pre- judgement as a result, filtering out multiple local template signals；
Based on the multiple local template signals filtered out, the final judging result of the msk signal to be demodulated is obtained.
The embodiment of the present invention discloses a kind of computer program product, and the computer program product is non-transient including being stored in
Computer program on computer readable storage medium, the computer program include program instruction, when described program instructs quilt
When computer executes, computer is able to carry out method provided by above-mentioned each method embodiment, for example,
Obtain the pre- court verdict of msk signal to be demodulated；
According to the pre- judgement as a result, filtering out multiple local template signals；
Based on the multiple local template signals filtered out, the final judging result of the msk signal to be demodulated is obtained.
The embodiment of the present invention provides a kind of non-transient computer readable storage medium, the non-transient computer readable storage
Medium storing computer instruction, the computer instruction make the computer execute side provided by above-mentioned each method embodiment
Method, for example,
Obtain the pre- court verdict of msk signal to be demodulated；
According to the pre- judgement as a result, filtering out multiple local template signals；
Based on the multiple local template signals filtered out, the final judging result of the msk signal to be demodulated is obtained.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above method embodiment can pass through
The relevant hardware of program instruction is completed, and program above-mentioned can be stored in a computer readable storage medium, the program
When being executed, step including the steps of the foregoing method embodiments is executed；And storage medium above-mentioned includes: ROM, RAM, magnetic disk or light
The various media that can store program code such as disk.
The embodiments such as device and equipment described above are only schematical, wherein described be used as separate part description
Unit may or may not be physically separated, component shown as a unit may or may not be
Physical unit, it can it is in one place, or may be distributed over multiple network units.It can be according to the actual needs
Some or all of the modules therein is selected to achieve the purpose of the solution of this embodiment.Those of ordinary skill in the art are not paying
In the case where creative labor, it can understand and implement.
Through the above description of the embodiments, those skilled in the art can be understood that each embodiment can
It realizes by means of software and necessary general hardware platform, naturally it is also possible to pass through hardware.Based on this understanding, on
Stating technical solution, substantially the part that contributes to existing technology can be embodied in the form of software products in other words, should
Computer software product may be stored in a computer readable storage medium, such as ROM/RAM, magnetic disk, CD, including several fingers
It enables and using so that a computer equipment (can be personal computer, server or the network equipment etc.) executes each implementation
Method described in certain parts of example or embodiment.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (7)
1. a kind of based on the msk signal demodulation method adjudicated in advance characterized by comprising
The pre- judgement of msk signal to be demodulated is obtained as a result, the pre- court verdict is the binary sequence of one group of presetting digit capacity；
According to the pre- judgement as a result, filtering out multiple local template signals, each local template signal is to be stored in advance in
The binary sequence of one group of local presetting digit capacity；
Based on the multiple local template signals filtered out, the final judging result of the msk signal to be demodulated is obtained；
It is described based on the multiple local template signals filtered out, obtain the final judging result of the msk signal to be demodulated, specifically
Are as follows:
Each local template signal is multiplied with the msk signal to be demodulated after delay preset time respectively, obtains multiple phases
Multiply result；
Each multiplied result is integrated, multiple integral results are obtained；
Envelope detection is carried out to each integral result, obtains multiple envelope detection values；
According to local template signal corresponding to maximum envelope detection value, the conclusive judgement of the msk signal to be demodulated is determined
As a result.
2. the method according to claim 1, wherein the pre- judgement for obtaining msk signal to be demodulated is as a result, tool
Body are as follows:
The pre- court verdict of the msk signal to be demodulated is obtained based on demodulating algorithm symbol-by-symbol.
3. the method according to claim 1, wherein the pre- judgement for obtaining msk signal to be demodulated is as a result, tool
Body are as follows:
The pre- court verdict of the msk signal to be demodulated is obtained based on a bit Differential demodulation algorithm.
4. the method according to claim 1, wherein the pre- court verdict for obtaining msk signal to be demodulated it
Before, further includes:
Msk signal to be demodulated is divided into two-way, to wherein being adjudicated in advance all the way, in addition postponing all the way.
5. a kind of based on the msk signal demodulating system adjudicated in advance characterized by comprising
Pre- decision device module, for obtaining the pre- judgement of msk signal to be demodulated as a result, the pre- court verdict is one group of default position
Several binary sequences；
Template filter device module, for according to the pre- judgement as a result, filter out multiple local template signals, each local template
Signal is the binary sequence for being stored in advance in one group of local presetting digit capacity；
Multiple symbol differential detection device module, for obtaining the MSK letter to be demodulated based on the multiple local template signals filtered out
Number final judging result；
The multiple symbol differential detection device module includes:
Delayer submodule, for postponing according to preset time to the msk signal to be demodulated
Multiplier submodule is obtained for each local template signal to be multiplied with the msk signal to be demodulated after delay respectively
Take multiple multiplied results；
Integrator submodule obtains multiple integral results for integrating to each multiplied result；
Envelope detector submodule obtains multiple envelope detection values for carrying out envelope detection to each integral result；
Decision device submodule determines described to be demodulated for the local template signal according to corresponding to maximum envelope detection value
The final judging result of msk signal.
6. a kind of electronic equipment for msk signal demodulation characterized by comprising
Memory and processor, the processor and the memory complete mutual communication by bus；The memory
It is stored with the program instruction that can be executed by the processor, the processor calls described program instruction to be able to carry out right such as and wants
Seek 1 to 4 any method.
7. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer program quilt
The method as described in Claims 1-4 is any is realized when processor executes.
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| CN115580515B (en) * | 2022-11-24 | 2023-03-31 | 四川九洲电器集团有限责任公司 | MSK demodulation method, device, equipment and storage medium based on multi-path judgment |
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| CN101272157A (en) * | 2008-05-04 | 2008-09-24 | 哈尔滨工业大学 | Ultra-broadband time-derived channel multiplexing method based on fractional number Fourier transform domain |
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| CN101023371A (en) * | 2004-08-16 | 2007-08-22 | 索尼爱立信移动通讯股份有限公司 | Apparatus, methods and computer program products for signal acquisition using common demodulation templates |
| CN101272157A (en) * | 2008-05-04 | 2008-09-24 | 哈尔滨工业大学 | Ultra-broadband time-derived channel multiplexing method based on fractional number Fourier transform domain |
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