CN108900447A - A kind of linear equalizer with good gain compensation effect - Google Patents
A kind of linear equalizer with good gain compensation effect Download PDFInfo
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- CN108900447A CN108900447A CN201810676801.8A CN201810676801A CN108900447A CN 108900447 A CN108900447 A CN 108900447A CN 201810676801 A CN201810676801 A CN 201810676801A CN 108900447 A CN108900447 A CN 108900447A
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- equalizer
- embeded processor
- gain compensation
- compensation effect
- data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L2025/03433—Arrangements for removing intersymbol interference characterised by equaliser structure
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L2025/03592—Adaptation methods
- H04L2025/03598—Algorithms
- H04L2025/03611—Iterative algorithms
- H04L2025/03636—Algorithms using least mean square [LMS]
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
The present invention relates to equalizer techniques fields, a kind of linear equalizer with good gain compensation effect is provided, including equalizer system, the equalizer system includes embeded processor and multidiameter option switch, analog data of the external access of the multidiameter option switch after conditioning, data conversion is then carried out by A/D converter, and is sent into the embeded processor, the embeded processor intrinsic call LMS algorithm carries out adaptive equalization to the data of acquisition；The problem of present invention devises the adaptive equalizer based on LMS algorithm using intrusive processor as platform, can well solve the intersymbol interference in wireless communication；And system bulk is small, low in energy consumption, portability is strong, by the reliability and validity of experimental verification system, has good practical value.
Description
Technical field
The present invention relates to equalizer techniques fields, and in particular to a kind of linear equalization with good gain compensation effect
Device.
Background technique
In wireless communication, signal is constantly present distortion when non-ideal communication channel transmits, and is embodied in intersymbol interference.For drop
Low interference usually carries out distortion compensation using adaptive equalizer in receiving end.Adaptive equalizer is generally by transversal filter
Composition, this is the form most easily realized in adaptive equalizer, and a kind of relatively more extensive method of practical application.Embedded place
Reason device has many advantages, such as high speed, high-precision and intelligence as the mainstream of intelligent control technology, has gradually replaced single-chip microcontroller skill
Art occupies most markets.Have in fields such as Industry Control, mobile device, intelligence instrument, information household appliances and network communications
It is widely applied.
Summary of the invention
The technical issues of solution
In view of the deficiencies of the prior art, the present invention provides a kind of linear equalizer with good gain compensation effect,
The present invention is intended to provide a kind of linear equalizer small in size, low in energy consumption, portability is strong.
Technical solution
In order to achieve the above object, the present invention is achieved by the following technical programs：
A kind of linear equalizer with good gain compensation effect, including equalizer system, the equalizer system packet
Include embeded processor and multidiameter option switch, analog quantity number of the external access of the multidiameter option switch after conditioning
According to then carrying out data conversion by A/D converter, and be sent into the embeded processor, inside the embeded processor
LMS algorithm is called to carry out adaptive equalization to the data of acquisition.
Further, the embeded processor selects LPC2131 microprocessor, it is to implement to imitate based on a support
The microprocessor of true and tracking 16/32 ARM7TD-MI-S CPU, the characteristic with high-performance and low-power consumption；Its device structure
Main includes the ram in slice of 8KB, multiple serial line interfaces, 18 A/D converter, 2 32 bit timing devices；The processing simultaneously
Device can be extended by external memory interface.
Further, the embeded processor is equipped with LCD interface, and the LCD interface is connected with by row driver
The graphic LCD module of HD61202 and line driver HD61203 composition, connects for real-time display through the outside of multidiameter option switch
Enter to acquire data and the data after adaptive equalization.
Further, the embeded processor is externally connected to input keyboard, for carrying out field adjustable and LMS
The adjustment of algorithm parameter.
Further, real time operating system built in the embeded processor, the real time operating system are divided into 4 not
The task of same priority, the task according to the sequencing of priority be respectively system monitoring, AD sampling, keyboard input and
LCD is shown.
Further, the LMS algorithm operating process includes following operating procedure：
A, hardware system and software systems are initialized；
B, the data of acquisition and reading after processing conversion；
C, LMS algorithm is called, least mean-square error calculating is carried out；
D, judge whether close to minimum or reach within the scope of allowable error, and by adjusting w value；
E, finally by convolution output waveform.
Beneficial effect
The present invention provides a kind of linear equalizers with good gain compensation effect, compared with existing well-known technique,
Of the invention has the advantages that：
1, this system devises the adaptive equalizer based on LMS algorithm using intrusive processor as platform, can be fine
Ground solves the problems, such as the intersymbol interference in wireless communication；And system bulk is small, low in energy consumption, portability is strong, passes through experimental verification
The reliability and validity of system has good practical value.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is system hardware structure schematic diagram of the invention；
Fig. 2 is LMS algorithm flow chart of the invention；
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Embodiment：
A kind of linear equalizer with good gain compensation effect of the present embodiment, referring to Fig.1-2：Including balanced device system
System, equalizer system include embeded processor and multidiameter option switch, and the external access of multidiameter option switch is after conditioning
Analog data, data conversion is then carried out by A/D converter, and is sent into embeded processor, in embeded processor
LMS algorithm is called to carry out adaptive equalization to the data of acquisition in portion.
Embeded processor selects LPC2131 microprocessor, it is to support to implement the 16/32 of emulation and tracking based on one
The microprocessor of position ARM7TD-MI-S CPU, the characteristic with high-performance and low-power consumption；Its device structure mainly includes the piece of 8KB
Interior RAM, multiple serial line interfaces, 18 A/D converter, 2 32 bit timing devices；Simultaneous processor can be connect by external memory
Mouth is extended.
Embeded processor is equipped with LCD interface, and LCD interface is connected with by row driver HD61202 and line driver
The graphic LCD module of HD61203 composition, external access acquisition data and process for real-time display through multidiameter option switch
Data after adaptive equalization.
Embeded processor is externally connected to input keyboard, for carrying out the adjustment of field adjustable and LMS algorithm parameter.
Real time operating system built in embeded processor, real time operating system are divided into the task of 4 different priorities, task
Sequencing according to priority is respectively that system monitoring, AD sampling, keyboard input and LCD are shown.
LMS algorithm operating process includes following operating procedure：
A, hardware system and software systems are initialized；
B, the data of acquisition and reading after processing conversion；
C, LMS algorithm is called, least mean-square error calculating is carried out；
D, judge whether close to minimum or reach within the scope of allowable error, and pass through；
E, finally by convolution output waveform.
This system devises the adaptive equalizer based on LMS algorithm using intrusive processor as platform, can be well
Solve the problems, such as the intersymbol interference in wireless communication；And system bulk is small, low in energy consumption, portability is strong, passes through experimental verification
The reliability and validity of system have good practical value.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, those skilled in the art should understand that：It still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these modification or
Replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (6)
1. a kind of linear equalizer with good gain compensation effect, which is characterized in that including equalizer system, the equilibrium
Device system includes embeded processor and multidiameter option switch, mould of the external access of the multidiameter option switch after conditioning
Analog quantity data then carry out data conversion by A/D converter, and are sent into the embeded processor, the embedded processing
Device intrinsic call LMS algorithm carries out adaptive equalization to the data of acquisition.
2. a kind of linear equalizer with good gain compensation effect according to claim 1, which is characterized in that described
Embeded processor selects LPC2131 microprocessor, it is based on 16/32 for supporting to implement emulation and tracking
The microprocessor of ARM7TD-MI-S CPU, the characteristic with high-performance and low-power consumption；Its device structure mainly includes in the piece of 8KB
RAM, multiple serial line interfaces, 18 A/D converter, 2 32 bit timing devices；The processor can pass through external memory simultaneously
Interface is extended.
3. a kind of linear equalizer with good gain compensation effect according to claim 1, which is characterized in that described
Embeded processor is equipped with LCD interface, and the LCD interface is connected with by row driver HD61202 and line driver HD61203 group
At graphic LCD module, external access acquisition data for real-time display through multidiameter option switch and pass through adaptive equalization
Data afterwards.
4. a kind of linear equalizer with good gain compensation effect according to claim 1, which is characterized in that described
Embeded processor is externally connected to input keyboard, for carrying out the adjustment of field adjustable and LMS algorithm parameter.
5. a kind of linear equalizer with good gain compensation effect according to claim 1, which is characterized in that described
Real time operating system built in embeded processor, the real time operating system are divided into the task of 4 different priorities, the task
Sequencing according to priority is respectively that system monitoring, AD sampling, keyboard input and LCD are shown.
6. a kind of linear equalizer with good gain compensation effect according to claim 1, which is characterized in that described
LMS algorithm operating process includes following operating procedure：
A, hardware system and software systems are initialized；
B, the data of acquisition and reading after processing conversion；
C, LMS algorithm is called, least mean-square error calculating is carried out；
D, judge whether close to minimum or reach within the scope of allowable error, and by adjusting w value；
E, finally by convolution output waveform.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810676801.8A CN108900447A (en) | 2018-06-27 | 2018-06-27 | A kind of linear equalizer with good gain compensation effect |
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| CN201810676801.8A CN108900447A (en) | 2018-06-27 | 2018-06-27 | A kind of linear equalizer with good gain compensation effect |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1343396A (en) * | 1999-03-10 | 2002-04-03 | 诺基亚移动电话有限公司 | Adaptive channel equalizer |
| US20080063041A1 (en) * | 2006-09-08 | 2008-03-13 | Noam Galperin | Fast training equalization of a signal |
| CN101710884A (en) * | 2009-12-04 | 2010-05-19 | 深圳国微技术有限公司 | Method for identifying QAM mode based on channel estimation and equalization |
| CN101753501A (en) * | 2008-11-28 | 2010-06-23 | Tcl集团股份有限公司 | Method for combining TD-SCDMA downlink with orthogonal frequency division multiplexing |
| CN104777466A (en) * | 2015-03-23 | 2015-07-15 | 河海大学 | Passive bistatic radar signal processing method based on dimension reduction constant modulus blind equalization |
| CN106982182A (en) * | 2017-04-18 | 2017-07-25 | 南京邮电大学 | A kind of high-speed adaptive DFF |
-
2018
- 2018-06-27 CN CN201810676801.8A patent/CN108900447A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1343396A (en) * | 1999-03-10 | 2002-04-03 | 诺基亚移动电话有限公司 | Adaptive channel equalizer |
| US20080063041A1 (en) * | 2006-09-08 | 2008-03-13 | Noam Galperin | Fast training equalization of a signal |
| CN101753501A (en) * | 2008-11-28 | 2010-06-23 | Tcl集团股份有限公司 | Method for combining TD-SCDMA downlink with orthogonal frequency division multiplexing |
| CN101710884A (en) * | 2009-12-04 | 2010-05-19 | 深圳国微技术有限公司 | Method for identifying QAM mode based on channel estimation and equalization |
| CN104777466A (en) * | 2015-03-23 | 2015-07-15 | 河海大学 | Passive bistatic radar signal processing method based on dimension reduction constant modulus blind equalization |
| CN106982182A (en) * | 2017-04-18 | 2017-07-25 | 南京邮电大学 | A kind of high-speed adaptive DFF |
Non-Patent Citations (2)
| Title |
|---|
| NXP: "《LPC2131技术手册》", 16 October 2007 * |
| 张平川: "无源探测系统及其关键技术研究", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
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