CN107800404A - Signal processing method based on lowest mean square - Google Patents
Signal processing method based on lowest mean square Download PDFInfo
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- CN107800404A CN107800404A CN201711007113.4A CN201711007113A CN107800404A CN 107800404 A CN107800404 A CN 107800404A CN 201711007113 A CN201711007113 A CN 201711007113A CN 107800404 A CN107800404 A CN 107800404A
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- initial weight
- signal
- processing method
- mean square
- error
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H21/00—Adaptive networks
- H03H21/0012—Digital adaptive filters
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- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
The invention discloses the signal processing method based on lowest mean square, comprise the following steps：S1：Extraction needs the signal segment analyzed, and sets initial weight and step-length；S2：Filtering is weighted according to initial weight to signal segment；S3：Error estimation is carried out to filtered signal segment；S4：Initial weight is modified according to the error estimated and performs S2；S5：When error is less than threshold value, the weights using initial weight now as this signal segment.Signal processing method of the invention based on lowest mean square, method by carrying out circulating amendment to initial weight, so that to different frequencies when being filtered, the signal until adapting to the frequency can be changed to initial weight by multiple circulation so that a kind of wave filter can be general by the signal of a variety of different frequencies.
Description
Technical field
The present invention relates to the communications field, and in particular to the signal processing method based on lowest mean square.
Background technology
Signal transacting is the system that various types of electric signals are processed with process by various expected purposes and requirement
Claim.Processing to analog signal is referred to as analog signal processing, and the processing to data signal is referred to as Digital Signal Processing.So-called " letter
Number processing ", seek to the signal being recorded on certain media to be handled, to extract the process of useful information, it is
The general designation of processing procedure such as extracted, converted, being analyzed, being integrated to signal.People in order to using signal it is necessary to at it
Reason.For example, it is necessary to be amplified to it when electric signal is small and weak；, it is necessary to be filtered I when frequency is uncomfortable to it when being mixed with noise
Should be when transmission, it is necessary to be modulated and demodulate；, it is necessary to balanced to it when signal runs into distorton；When signal type very
When more, it is necessary to be identified etc..
Existing signal filtering technique is filtered to the signal of different frequency using different methods so that signal filters
Device can not be general.
The content of the invention
The technical problems to be solved by the invention are that existing signal filtering technique uses difference to the signal of different frequency
Method be filtered so that traffic filter can not be general, and it is an object of the present invention to provide the signal processing method based on lowest mean square,
Solve the above problems.
The present invention is achieved through the following technical solutions：
Signal processing method based on lowest mean square, comprises the following steps：S1：Extraction needs the signal segment analyzed, and
Set initial weight and step-length；S2：Filtering is weighted according to initial weight to signal segment；S3：To filtered signal patch
Duan Jinhang error estimations；S4：Initial weight is modified according to the error estimated and performs S2；S5：When error is less than threshold
During value, the weights using initial weight now as this signal segment.
In the prior art, signal filtering technique is filtered to the signal of different frequency using different methods so that letter
Number wave filter can not be general.During present invention application, first extraction needs the signal segment analyzed, and sets initial weight and step-length；
Filtering is weighted according to initial weight to signal segment again；Then error estimation is carried out to filtered signal segment；It is right again
Initial weight is modified and performs S2 according to the error estimated afterwards；Subsequently when error is less than threshold value, by now
Weights of the initial weight as this signal segment.Method of the present invention by carrying out circulating amendment to initial weight so as to not
Same when being filtered of frequency, can be changed the letter until adapting to the frequency by multiple circulation to initial weight
Number so that a kind of wave filter can be general by the signal of a variety of different frequencies.
Further, the step-length takes 20ms~100ms.
Further, initial weight is modified described in step S4 using using error and the product of error parameter as
The increment of initial weight.
Further, the initial weight selects 1.
Further, threshold value described in step S5 uses 0.01~0.03.
The present invention compared with prior art, has the following advantages and advantages：
Signal processing method of the invention based on lowest mean square, the method by carrying out circulating amendment to initial weight, makes
Initial weight can must be changed to different frequencies when being filtered until adapting to the frequency by multiple circulation
Signal so that a kind of wave filter can be general by the signal of a variety of different frequencies.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, with reference to embodiment, the present invention is made
Further to describe in detail, exemplary embodiment of the invention and its explanation are only used for explaining the present invention, are not intended as to this
The restriction of invention.
Embodiment
Signal processing method of the invention based on lowest mean square, comprises the following steps：S1：Extraction needs the signal patch analyzed
Section, and set initial weight and step-length；S2：Filtering is weighted according to initial weight to signal segment；S3：To filtered letter
Number fragment carries out error estimation；S4：Initial weight is modified according to the error estimated and performs S2；S5：When error is low
When threshold value, the weights using initial weight now as this signal segment.The step-length takes 20ms~100ms.In step S4
It is described initial weight to be modified using the increment using error and the product of error parameter as initial weight.The initial power
Value selects 1.Threshold value described in step S5 uses 0.01~0.03.
When the present embodiment is implemented, first extraction needs the signal segment analyzed, and sets initial weight and step-length；Again to signal
Fragment is weighted filtering according to initial weight；Then error estimation is carried out to filtered signal segment；Subsequently basis is estimated
The error calculated is modified to initial weight and performs S2；Subsequently when error is less than threshold value, by initial weight now
Weights as this signal segment.Method of the present invention by carrying out circulating amendment to initial weight so as to different frequencies
When being filtered, the signal until adapting to the frequency can be changed to initial weight by multiple circulation so that one
Kind wave filter can be general by the signal of a variety of different frequencies.
Above-described embodiment, the purpose of the present invention, technical scheme and beneficial effect are carried out further
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc., all should include
Within protection scope of the present invention.
Claims (5)
1. the signal processing method based on lowest mean square, it is characterised in that comprise the following steps：
S1：Extraction needs the signal segment analyzed, and sets initial weight and step-length；
S2：Filtering is weighted according to initial weight to signal segment；
S3：Error estimation is carried out to filtered signal segment；
S4：Initial weight is modified according to the error estimated and performs S2；
S5：When error is less than threshold value, the weights using initial weight now as this signal segment.
2. the signal processing method according to claim 1 based on lowest mean square, it is characterised in that the step-length takes 20ms
~100ms.
3. the signal processing method according to claim 1 based on lowest mean square, it is characterised in that right described in step S4
Initial weight is modified using the increment using error and the product of error parameter as initial weight.
4. the signal processing method according to claim 1 based on lowest mean square, it is characterised in that the initial weight choosing
With 1.
5. the signal processing method according to claim 1 based on lowest mean square, it is characterised in that threshold described in step S5
Value uses 0.01~0.03.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711007113.4A CN107800404A (en) | 2017-10-25 | 2017-10-25 | Signal processing method based on lowest mean square |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711007113.4A CN107800404A (en) | 2017-10-25 | 2017-10-25 | Signal processing method based on lowest mean square |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107800404A true CN107800404A (en) | 2018-03-13 |
Family
ID=61533617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711007113.4A Pending CN107800404A (en) | 2017-10-25 | 2017-10-25 | Signal processing method based on lowest mean square |
Country Status (1)
| Country | Link |
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| CN (1) | CN107800404A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1190824A (en) * | 1997-02-15 | 1998-08-19 | 三星电子株式会社 | Signal self-adaptive wave filter method and filter |
-
2017
- 2017-10-25 CN CN201711007113.4A patent/CN107800404A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1190824A (en) * | 1997-02-15 | 1998-08-19 | 三星电子株式会社 | Signal self-adaptive wave filter method and filter |
Non-Patent Citations (1)
| Title |
|---|
| 罗会彬: "自适应滤波", 《深水炸弹技术》 * |
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Application publication date: 20180313 |