CN101502068A - Chip equalizer and equalizing method - Google Patents
Chip equalizer and equalizing method Download PDFInfo
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- CN101502068A CN101502068A CNA2007800293462A CN200780029346A CN101502068A CN 101502068 A CN101502068 A CN 101502068A CN A2007800293462 A CNA2007800293462 A CN A2007800293462A CN 200780029346 A CN200780029346 A CN 200780029346A CN 101502068 A CN101502068 A CN 101502068A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/01—Equalisers
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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
- H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
- H04L25/03019—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception
- H04L25/03038—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a non-recursive structure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/005—Control of transmission; Equalising
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0064—Concatenated codes
- H04L1/0065—Serial concatenated codes
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
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- Noise Elimination (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
Disclosed are a chip equalizer and an equalizing method capable of minimizing complexity for signal demodulation in accordance with performance of a receiver. The chip equalizer comprises a delay control module that recognizes an area having a main signal included therein from a signal distribution of signals received from a tuner and determines a noise compensation area in accordance with a delay difference between neighboring main signals; at least one first unit delay module that delays, among the signals received from the tuner, a signal of the area having the main signal included therein at an interval of a chip unit and outputs it to a tap coefficient estimation module; and at least one second module that delays, among the signals received from the tuner, a signal of an area having no main signal included therein at an interval of a chip unit.
Description
Technical field
The present invention relates to communication system, relate more specifically to chip equalizer and equalization methods, it can and change amount of calculation adaptively according to the complexity of the performance minimum signal demodulation of receiver.
Background technology
Recent years,, expanded the commercialization of digital broadcasting service along with the increase in demand of user to high quality audio and video traffic.Digital broadcasting can be categorized as satellite broadcasting and terrestrial broadcast.
For satellite digital broadcasting, satellite base station receive from each broadcasting station broadcast data and the up transmit path by assigned frequency band with it to satellite transmission, and satellite amplifies with frequency conversion to the signal that receives from satellite base station and sends it to service area.
Thus, the receiver in the broadcasting-satellite service zone is from the satellite receiving broadcast signal, and the video and/or audio of broadcast broadcasting.Simultaneously, in order to solve because shade that building or shelter cause or the problem that stops caused signal attenuation use gap tucker (gap filler) to come the repeat broadcast signal.
Fig. 1 shows the notion of conventional satellite broadcast system.
With reference to Fig. 1, broadcasting-satellite system comprises broadcasting station 100, satellite base station 110, satellite 120, satellite control station 130, broadcast receiving apparatus 140 and gap tucker 150.
Yet, gap tucker 150 at signal because the shade that building or shelter produce or stop caused decay and serious position relaying and send broadcast singal.Gap tucker 150 is converted into the signal of the CDM (code division multiplexing) of S frequency band from TDM (time division multiplexing) signal of satellite 120 reception Ku frequency bands, then sends the signal after changing.
The cdm signal of the cdm signal of the S frequency band that 140 pairs of broadcast receiving apparatus in the broadcasting-satellite service zone receive from satellite 120 and the S frequency band that receives via gap tucker 150 carries out demodulation, and plays the video and/or audio of broadcasting.Broadcast receiving apparatus 140 can be portable terminal (for example mobile communication terminal, personal digital assistant (PDA), be installed in terminal on the vehicle etc.).
Fig. 2 shows the frame structure of the baseband transmit signals of common gap tucker.
With reference to Fig. 2, frame structure has the basic frame of 12.75ms.6 basic frames constitute the superframe of 76.5ms.The QPSK signal that each broadcast channel is made up of 816 bytes (6528), wherein I (same-phase) channel and Q (quadrature phase) channel are made up of 408 bytes respectively.The pilot channel that is assigned to No. 0 code of Walsh (Walsh 0-number code) is used for the transmission of frame synchronization and control data.Pilot frequency code element (PS) and control data (Di) are made up of 25 a unit respectively.Single pilot channel frame is made up of 102 pieces that comprise 32, (i.e. 125,2048 chips).In other words, single pilot channel frame by 51 pilot frequency code elements (PS) and control data (Di, i=1,2 ..., 51) form.D1 (first control data of pilot channel) is the unique word that is used for frame synchronization.Pilot frequency code element sends with the order of " 11,111,111 11,111,111 11,111,111 11111111 ", and unique word (D1) sends with the order of " 01,101,010 10,110,101 01,011,001 10001010 ".Pilot frequency code element (PS) and unique word (D1) are the pilot datas of having discerned in the broadcast receiving apparatus 140.
Fig. 3 shows the structure of conventional satellite broadcast transmission system.
As shown in the figure, the satellite broadcasting transmitting system comprises Reed-Solomon (RS) encoder 110-1～110-n, byte interleaver device 120-1～120-n, convolution coder 130-1～130-n and position interleaver 140-1～140-n, and these are to be used for parts that audio/video (AV) signal is encoded.The satellite broadcasting transmitting system also comprises RS encoder 110-x, byte interleaver device 120-x and convolution coder 130x, and these are to be used for the parts of encoding to as the pilot signal of control signal.The satellite broadcasting transmitting system also comprises and is used for AV signal behind the coding and the modulator 150 modulated of pilot signal and is used to carry out up-conversion with the upconverter 160 by the antenna transmission broadcast singal.
In this transmitting system, in order to carry out independent broadcasting, utilize different orthogonal intersections to send broadcast singal at each broadcasting station and/or content, receiving system utilizes walsh code to distinguish different broadcasting/content signals.
Fig. 4 shows the structure of conventional satellite broadcast receiver system.
Satellite broadcast reception systems comprises that tuner 210-1～210-2, CDM (code division multiplexing) demodulation part 220, channel demodulation part 230, demodulation multiplexer 240 and pilot channel demodulation section divide 250.
CDM demodulation part 220 comprises a plurality of Rake branch roads (finger) 2210-1～2210-2 that is used for according to PN sign indicating number receiving broadcast signal, according to signal strength signal intensity with postpone, and utilize walsh code to carry out the despreader 2230-1～2230-2 of despreading from the output signal of adder 2220-1～2220-2 from the adder 2220-1～2220-2 of the signal output signal that receives by Rake branch road 2210-1～2210-2.The output signal of CDM demodulation part 220 is divided into broadcast channel signal and pilot frequency channel signal.Broadcast channel signal is decoded in channel demodulation part 230, and pilot frequency channel signal divides decoding in 250 in pilot channel demodulation section.
For this reason, channel demodulation part 230 comprises a deinterleaver 2310-1～2310-2, Viterbi (viterbi) decoder 2320-1～2320-2, byte deinterleaver 2330-1～2330-2 and RS decoder 2340-1～2340-2.Pilot channel demodulation section divides 250 to comprise Viterbi decoder 2510, byte deinterleaver 2520, RS decoder 2530 and receiver controller 2540.
In addition, the signal that reverts to audio signal and vision signal in channel demodulation part 230 by demultiplexing, and is played in demodulation multiplexer 240.
The problem that current satellite broadcast reception systems has is: lose owing to the delay of received signal and the frequency expansion in the multipath channel environment cause the walsh code orthogonality of received signal, and can take place therefore that multichannel disturbs and the broadcast singal of expectation can not correctly recover.These problems can overcome by the mode that reduces interference signal.Yet in the case, broadcasting service channel is restricted.
Therefore, after deliberation a kind ofly reduce the interference between the received signal and can not limit the method for broadcast channel.As a kind of scheme, a kind of method from equalizer to receiving system that introduce is arranged.
Equalization is a kind of interchannel noise and channel distortion of removing the channel latency that causes owing to multipath, and the amplitude of unanimity and the signal processing technology of phase attributes are provided on whole frequency band thus.Generally, the equalizer utilization is attached with the fixed delay line of tap (tap) and regulates tap coefficient according to the lag characteristic of input signal, compensates intersymbol interference thus.Tap coefficient can change and can distribute according to the noise signal (that is inhibit signal) at place, the delay position around the data-signal according to channel estimating information to be determined.In other words, tap coefficient is set to the value that is used to remove noise signal.
Fig. 5 shows the receiving system of utilizing common chip equalizer.
Chip equalizer 300 comprises: first equalizer 302, and it utilizes the pilot frequency channel signal identify from the broadcast singal that is received from tuner to obtain channel information, and utilizes the channel information that obtains updating of tap coefficients first; Second equalizer 304, it produces the pilot signal of recovering according to the tap coefficient that upgrades in first equalizer 302, and utilizes pilot signal of recovering and the pilot frequency channel signal that identifies from the broadcast singal that receives to come updating of tap coefficients for the second time; And detector 306, the broadcast singal that it utilizes tap coefficient of upgrading for the second time in second equalizer 304 to recover to receive, and the recovered broadcast signal sent to channel demodulator.
The tap coefficient of describing in the chip equalizer 300 with reference to Fig. 6 upgrades processing.
Fig. 6 shows the detail view of the structure of equalizer shown in Figure 5.
As shown in the figure, equalizer comprises: unit delay module 312, and it is the broadcast singal that postpones at interval by the tuner reception with the chip units; Tap coefficient estimation module 314, its each signal application spreading code to exporting from each lead-out terminal of unit delay module 312, add up the spreading code application result to calculate the pilot signal of recovering, then use the tap coefficient after current tap coefficient upgrades with output; Adder 316, it comes error of calculation value according to the output signal of tap coefficient estimation module 314 and the pilot frequency channel signal that identifies from the broadcast singal that receives; And step-length adjusting module 318, the error amount that its utilization calculates upgrades step-length, and sends step-length renewal result with updating of tap coefficients to tap coefficient estimation module 314.
In this equaliser structure, the unit delay module for example by with the chip units be move at interval with the corresponding common pilot of 64 chips in the combined sequence of employed walsh code and PN sign indicating number, a position signal that receives is formed 64 pieces, one of them piece and become a unit.
Do not examine the example that discloses above-mentioned equalizer among the open No.2006-39961 in Korean Patent.
When to reception system applies equalizer, can follow the tracks of multipath channel and minimum is reduced in the interference between the adjacent channel.Yet, owing to should use tap coefficient to compensate, so the complexity of receiving system increases to the whole noise signals that in the signal that receives, comprise.
Specifically,, utilize the mobile communication terminal of broadcasting-satellite service to have worse performance, so when using above-mentioned chip equalizer, complexity increases, and has reduced the speed of service thus owing to compare with the equipment of for example base station.
Summary of the invention
Technical problem
The present invention is proposed to solve the problem that takes place in the prior art.The purpose of this invention is to provide a kind of chip equalizer and equalization methods, it can only compensate noise signal at the part that has comprised master signal component, improves the performance of the receiving system of having used equalizer thus and simplifies receiver module.
Another object of the present invention is the amount of calculation that changes the noise signal compensation according to the performance of receiving system adaptively, revises the performance of receiving system thus according to purposes.
Technical scheme
To achieve these goals, according to the embodiment of the present invention, a kind of chip equalizer is provided, this chip equalizer comprises: postpone control module, its identification from the signal distributions of the signal that is received from tuner comprises the zone of main signal, and determines the noise compensation zone according to the delay variance between the adjacent main signal; At least one first unit delay module, it the signal that receives from described tuner is the signal that postpones to comprise the zone of described main signal at interval with the chip units, and this signal is outputed to the tap coefficient estimation module; And at least one second unit delay module, it the signal that receives from described tuner is the signal that postpones not comprise the zone of main signal at interval with the chip units under the control of described delay control module.
In addition, according to another embodiment of the present invention, a kind of chip equalizer is provided, this chip equalizer comprises: postpone control module, its identification from the signal distributions of the signal that is received from tuner comprises the zone of main signal, inspection comprises the scope in the zone of main signal, and determines noise compensation zone and scope according to the delay variance between the adjacent main signal; At least one first unit delay module, it is under the control of described delay control module, the signal that receives from described tuner be the signal that postpones to comprise the frequency range of described main signal at interval, and this signal is outputed to the tap coefficient estimation module with the chip units; And at least one second unit delay module, it the signal that receives from described tuner is the signal that postpones not comprise the zone of main signal at interval with the chip units under the control of described delay control module.
In addition, according to a further aspect in the invention, a kind of equalization methods is provided, this method comprises the steps: first step, when receiving signal by tuner, the profile of the signal that analysis receives (profile) comprises the zone of main signal with identification, determines the window's position (that is noise compensation zone) thus; Second step is estimated to comprise the tap coefficient in the zone of described main signal according to described the window's position; Third step is by coming error of calculation value with reference to described tap coefficient of estimating and the pilot frequency channel signal that identifies from the signal that receives in described second step; The 4th step is upgraded step-length according to described error amount; And the 5th step, upgrade estimated tap coefficient according to the step-length after upgrading.
Beneficial effect
According to the present invention, in the receiving system of having used equalizer, the amount of calculation of signal demodulation is dropped to minimumly, make that the power consumption of receiving system is minimum and amount of calculation is minimum.In addition, can simplify the structure of receiving system.
In addition, owing to can change the amount of calculation of noise compensation adaptively according to the performance of receiving system, so the performance of receiving system can change according to its purposes.In addition, can in the small-scale receiving system, receive and reproduce various broadcast singals and the interference that do not produce adjacent channel.
Description of drawings
Above-mentioned and other purposes of the present invention, feature and advantage will become more obvious according to detailed description with the accompanying drawing subsequently, wherein:
Fig. 1 shows the notion of conventional satellite broadcast system;
Fig. 2 shows the frame structure of the baseband transmit signals of common gap tucker;
Fig. 3 shows the structure of conventional satellite broadcast transmission system;
Fig. 4 shows the structure of conventional satellite broadcast receiver system;
Fig. 5 illustration utilize the receiving system of common chip equalizer;
Fig. 6 shows the detail view of the structure of equalizer shown in Figure 5;
Fig. 7 shows the structure of chip equalizer according to the embodiment of the present invention;
Fig. 8 shows the structure according to the chip equalizer of another embodiment of the present invention; And
Fig. 9 shows the flow chart of equalization methods of the present invention.
The description of reference numerals of vitals in the＜accompanying drawing 〉
302: the first equalizers
304: the second equalizers
306: detector
320: chip equalizer
3210: postpone control module
3220,3240: the first unit delay module
3230: the second unit delay modules
3250: the tap coefficient estimation module
3260: adder
3270: the step-length adjusting module
Embodiment
Below in conjunction with accompanying drawing preferred implementation of the present invention will be described more specifically.
Fig. 7 shows the structure of chip equalizer according to the embodiment of the present invention.
Postpone control module 3210 and will comprise that the zone of the main signal of the signal that receives determines as the noise compensation zone, and send the signal in the zone that comprises main signal to the first unit delay module 3220,3240.In addition, postpone control module 3210 sends signal from the zone of the main signal that does not comprise the signal that receives to the second unit delay module 3230.
Tap coefficient estimation module 3250 receives from the signal of each lead-out terminal output of the first unit delay module 3220,3240, tap coefficient estimation module 3250 is used spreading code to each output signal, add up the spreading code application result to calculate the pilot signal of recovering, then use the tap coefficient after current tap coefficient upgrades with output.
In the present embodiment, consider that the whole main signals that are included in the state of delay variance is arranged in the signal that receives are not to be distributed on the wide region but the characteristic of channel that occurs with burst form, only the noise to the zone that comprised master signal component compensates and other zones of uncompensation.Therefore, the necessary amount of calculation of signal that can will be used to recover received in the limited receiving system of the signal handling capacity of for example mobile communication terminal reduces to minimum.
Fig. 8 shows the structure according to the chip equalizer of another embodiment of the present invention.
The structure of the chip equalizer of describing except reference Fig. 7, present embodiment provides a kind of chip equalizer that can control the noise compensation scope in the zone that comprises master signal component.
Specifically, the chip equalizer 330 of present embodiment comprises: postpone control module 3310, it identifies the zone that comprises main signal and the zone that does not comprise main signal from the signal distributions of the signal that receives by tuner, inspection comprise main signal the zone scope and determine noise compensation zone and scope according to the delay variance between the adjacent main signal; At least one first unit delay module 3320,3340, it in the signal in the zone that comprises main signal is to postpone at interval by postponing included signal in the scope that control module 3310 determines with the chip units; And at least one second unit delay module 3330, it the signal that receives from tuner is the signal that postpones not comprise the zone of main signal at interval with the chip units.
The signal of exporting from each lead-out terminal of the first unit delay module 3220,3240 is imported into tap coefficient estimation module 3350.Tap coefficient estimation module 3350, adder 3360 and step-length adjusting module 3370 are carried out and the described similar function of Fig. 7.Therefore, omit its detailed description.
The described chip equalizer 320 usefulness uniform windows (tap coefficient estimation window) according to the embodiment of the present invention of Fig. 7 compensate the noise of the signal in the frequency range that comprises main signal.Chip equalizer shown in Figure 8 also supports the characteristic changing according to the signal that receives to carry out the window size of the signal of noise compensation.
The window size of present embodiment has the size by first Postponement module 3220,3240 of the dotted line of Fig. 8, and the quantity of the chip delay device (Tc) of the noise of signal from compensation to tap coefficient estimation module 3350 output delay signals that receive with of expression.
Described a kind of method, wherein when the signal that receives is input to Fig. 7 and chip equalizer shown in Figure 8, estimated tap coefficient, and recovered primary signal with tap coefficient.
Fig. 9 shows the flow chart of equalization methods of the present invention.
When receiving signal by tuner, the profile (S10) that delay control module 3210,3310 is analyzed the signal that receives comprises the zone of main signal with identification and does not comprise the zone of main signal, and determine the noise compensation zone according to the delay variance between the adjacent main signal, i.e. the window's position (S20).At this, postpone the signal that control module 3210,3310 can analyze the profile of the signal that receives and will have a predetermined value of the intensity that is equal to or greater than the signal that receives and be identified as main signal.
According to the window's position of determining at step S20 is to postpone to the received signal in the first unit delay module 3220,3240,3320,3340 at interval with the chip units, then this signal is input in the tap coefficient estimation module 3250,3350, to estimate tap coefficient (S30).Estimation for the tap coefficient in step S30, tap coefficient estimation module 3250,3350 is used spreading code to each output signal, add up the spreading code application result to calculate the pilot signal of recovering, then use the tap coefficient after current tap coefficient upgrades with output.
Afterwards, when calculating error amount (S40), this error amount is input to step- length adjusting module 3270,3370 according to the output signal of tap coefficient estimation module 3250,3350 and the pilot frequency channel signal that identified.Thus, when having upgraded step-length (S50), this step-length is input to tap coefficient estimation module 3250,3350, with updating of tap coefficients (S60).
Simultaneously, except before carrying out step S30 and after step S20, in postponing control module 3210,3310, determining the noise compensation zone according to the delay variance between the adjacent main signal, can also be used for determining the step S25 of noise compensation scope (that is window size).In the case, because comfort noise compensation range adaptively, so can further reduce the amount of calculation of signal demodulation.
Although illustrate and described the present invention, it will be understood by those skilled in the art that and under the situation that does not break away from the spirit and scope of the present invention defined by the appended claims, to make various changes form and details with reference to its certain preferred embodiments.
Industrial usability
According to the present invention, in the receiving system of having used balanced device, reduced as far as possible the signal demodulation Amount of calculation so that the power consumption of receiving system reduces as far as possible and amount of calculation reduces as far as possible. This Can simplify the structure of receiving system outward.
In addition, owing to can change adaptively according to the performance of receiving system the calculating of noise compensation Amount is so the performance of receiving system can change according to its purposes. In addition, can be in small-scale Receive in the receiving system and reproduce various broadcast singals and the interference that do not produce adjacent channel.
Claims (14)
1, a kind of chip equalizer that is used for receiving system, this chip equalizer comprises:
Postpone control module, its identification from the distribution of the signal that is received from tuner comprises the zone of main signal, and determines the noise compensation zone according to the delay variance between the adjacent main signal;
At least one first unit delay module, it the signal that receives from described tuner is the signal that postpones to comprise the zone of described main signal at interval with the chip units, and this signal is outputed to the tap coefficient estimation module; And
At least one second unit delay module, it the signal that receives from described tuner is the signal that postpones not comprise the zone of main signal at interval with the chip units under the control of described delay control module.
2, chip equalizer according to claim 1, this chip equalizer also comprises:
The tap coefficient estimation module, its each signal application spreading code to exporting from each lead-out terminal of described at least one first unit delay, the pilot signal that the spreading code application result that adds up recovers with calculating, and then use current tap coefficient to export the tap coefficient after upgrading;
Adder, it comes error of calculation value according to the output signal of described tap coefficient estimation module and the pilot frequency channel signal that identifies from the signal from described tuner; And
The step-length adjusting module, it utilizes the error amount that calculates in described adder to upgrade step-length, and sends step-length renewal result to described tap coefficient estimation module.
3, chip equalizer according to claim 1, wherein, the profile of the signal that the analysis of described delay control module receives comprises the zone of the main signal in the described signal that receives with identification.
4, chip equalizer according to claim 3, wherein, the signal that described delay control module will have the predetermined value of the intensity that is equal to or greater than the described signal that receives is identified as described main signal.
5, chip equalizer according to claim 1, wherein, described delay control module sends the signal in the zone with the main signal in the signal that receives to the described first unit delay module, and sends the signal in the zone of the main signal in the signal that does not receive to the described second unit delay module.
6, a kind of chip equalizer that is used for receiving system, this chip equalizer comprises:
Postpone control module, its identification from the distribution of the signal that is received from tuner comprises the zone of main signal, checks the scope in the zone that comprises main signal, and determines noise compensation zone and scope according to the delay variance between the adjacent main signal;
At least one first unit delay module, it is under the control of described delay control module, the signal that receives from described tuner be the signal that postpones to comprise the frequency range of described main signal at interval, and this signal is outputed to the tap coefficient estimation module with the chip units; And
At least one second unit delay module, it the signal that receives from described tuner is the signal that postpones not comprise the zone of main signal at interval with the chip units under the control of described delay control module.
7, chip equalizer according to claim 6, this chip equalizer also comprises:
The tap coefficient estimation module, its each signal application spreading code to exporting from each lead-out terminal of described at least one first unit delay, the pilot signal that the spreading code application result that adds up recovers with calculating, and then use current tap coefficient to export the tap coefficient after upgrading;
Adder, it comes error of calculation value according to the output signal of described tap coefficient estimation module and the pilot frequency channel signal that identifies from the signal from described tuner; And
The step-length adjusting module, it utilizes the error amount that calculates in described adder to upgrade step-length, and sends step-length renewal result to described tap coefficient estimation module.
8, chip equalizer according to claim 6, wherein, the profile of the signal that the analysis of described delay control module receives comprises the zone of the main signal in the described signal that receives with identification.
9, chip equalizer according to claim 8, wherein, the signal that described delay control module will have the predetermined value of the intensity that is equal to or greater than the described signal that receives is identified as described main signal.
10, chip equalizer according to claim 6, wherein, described noise compensation scope is the quantity of the chip delay device in the described first unit delay module, and this chip delay device is the signal that postpones at interval with the chip units to described tap coefficient estimation module output.
11, chip equalizer according to claim 6, wherein, described delay control module sends the signal in the zone with the main signal in the signal that receives to the described first unit delay module, and sends the signal in the zone of the main signal in the signal that does not receive to the described second unit delay module.
12, the equalization methods in a kind of receiving system, this method comprises the steps:
First step, when receiving signal by tuner, the profile of analyzing the signal receive comprises with identification the zone of main signal determines the window's position thus;
Second step is estimated to comprise the tap coefficient in the zone of described main signal according to described the window's position;
Third step is by coming error of calculation value with reference to described tap coefficient of estimating and the pilot frequency channel signal that identifies from the signal that receives in described second step;
The 4th step is upgraded step-length according to described error amount; And
The 5th step is upgraded estimated tap coefficient according to the step-length after upgrading.
13, method according to claim 12, wherein, the signal that has the predetermined value of the intensity that is equal to or greater than the described signal that receives in first step is identified as main signal.
14, method according to claim 12, this method is further comprising the steps of: carry out after described first step before described second step, determine the noise compensation scope in the residing zone of described main signal.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020060074288 | 2006-08-07 | ||
| KR20060074288 | 2006-08-07 | ||
| KR10-2006-0074288 | 2006-08-07 | ||
| PCT/KR2007/003788 WO2008018736A1 (en) | 2006-08-07 | 2007-08-07 | Chip equalizer and equalizing method |
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| Publication Number | Publication Date |
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| CN101502068A true CN101502068A (en) | 2009-08-05 |
| CN101502068B CN101502068B (en) | 2012-05-30 |
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| CN2007800293462A Expired - Fee Related CN101502068B (en) | 2006-08-07 | 2007-08-07 | Chip equalizer and equalizing method |
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|---|---|
| EP (1) | EP2050241A4 (en) |
| KR (1) | KR101393428B1 (en) |
| CN (1) | CN101502068B (en) |
| WO (1) | WO2008018736A1 (en) |
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| CN102271008A (en) * | 2011-07-28 | 2011-12-07 | 上海华为技术有限公司 | Method and system for detecting channel noise |
| CN106452551A (en) * | 2015-08-06 | 2017-02-22 | 船井电机株式会社 | Receiving device |
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| US6650700B1 (en) * | 1999-10-22 | 2003-11-18 | Zenith Electronics Corporation | Dual path ghost eliminating equalizer with optimum noise enhancement |
| JP3643293B2 (en) * | 2000-05-24 | 2005-04-27 | パナソニック コミュニケーションズ株式会社 | Adaptive equalizer training circuit, modem device, and communication device |
| US20020191568A1 (en) * | 2001-03-29 | 2002-12-19 | Koninklijke Philips Electronics N.V. | Adaptive chip equalizers for synchronous DS-CDMA systems with pilot sequences |
| US7167507B2 (en) * | 2002-07-01 | 2007-01-23 | Lucent Technologies Inc. | Equalizer and method for performing equalization in a wireless communications system |
| US7319659B2 (en) * | 2003-04-24 | 2008-01-15 | Silicon Integrated System Corp. | OFDM receiver, mode detector therefor, and method for processing OFDM signals |
| KR100603202B1 (en) * | 2004-06-28 | 2006-07-24 | 삼성전자주식회사 | Method and apparatus for auto selecting step size of LMS type equalizer |
-
2007
- 2007-08-07 EP EP07793400.8A patent/EP2050241A4/en not_active Withdrawn
- 2007-08-07 KR KR1020097000187A patent/KR101393428B1/en active IP Right Grant
- 2007-08-07 CN CN2007800293462A patent/CN101502068B/en not_active Expired - Fee Related
- 2007-08-07 WO PCT/KR2007/003788 patent/WO2008018736A1/en active Application Filing
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102271008A (en) * | 2011-07-28 | 2011-12-07 | 上海华为技术有限公司 | Method and system for detecting channel noise |
| CN102271008B (en) * | 2011-07-28 | 2014-01-01 | 上海华为技术有限公司 | Method and system for detecting channel noise |
| CN106452551A (en) * | 2015-08-06 | 2017-02-22 | 船井电机株式会社 | Receiving device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008018736A1 (en) | 2008-02-14 |
| EP2050241A1 (en) | 2009-04-22 |
| KR101393428B1 (en) | 2014-06-27 |
| KR20090038001A (en) | 2009-04-17 |
| CN101502068B (en) | 2012-05-30 |
| EP2050241A4 (en) | 2017-09-13 |
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