CN101488780B - Network apparatus for eliminating interference between transmission interfaces and method thereof - Google Patents
Network apparatus for eliminating interference between transmission interfaces and method thereof Download PDFInfo
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- CN101488780B CN101488780B CN200810003801.8A CN200810003801A CN101488780B CN 101488780 B CN101488780 B CN 101488780B CN 200810003801 A CN200810003801 A CN 200810003801A CN 101488780 B CN101488780 B CN 101488780B
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Abstract
A network device for eliminating interference among transmitting ports comprises a plurality of transmitting ports and at least a cross-port near-end crosstalk canceller. The cross-port near-end crosstalk canceller is a special transmitting port which is coupled in a plurality of transmitting ports and used for eliminating the near-end crosstalk interference of other transmitting ports in a plurality of transmitting ports. The cross-port near-end crosstalk canceller is operated in time domain or frequency domain. In an embodiment, the network device is a switch.
Description
Technical field
The present invention relates to a kind of network equipment and correlation technique thereof, espespecially a kind of network equipment and correlation technique thereof eliminating interference among transmitting ports.
Background technology
1Gbase-T/10Gbase-T Ethernet (Ethernet) system utilizes four to without screen type twisted-pair feeder (Unshielded Twisted Pair, UTP) transmitted in both directions of full duplex (full duplex) is carried out, therefore, a transmit port can comprise multiple channel, such as four channels.The signal that the conveyer of a usual passage (namely a pair without screen type twisted-pair feeder) transmits can be subject to echo (Echo) interference that its receiver itself causes, and the near-end crosstalk (near end crosstalk, NEXT) being subject to being formed from the receiver of other passage is disturbed.In the Digital Signal Processing of receiver, these interference must be eliminated, generally speaking, lowest mean square finite impulse response (FIR) arrester (LMS update FIRcanceller) can be adopted in time-domain to eliminate interference, or be transformed into frequency domain to do interference elimination.
But prior art only considers the interference (echo and near-end crosstalk) eliminated in same transmit port, actually, similarly be the network equipment such as interchanger with several transmit port, often can run into the interference from other transmit port.For example, in order to reduce costs, in present multi-port switch the transformer (transformer) of (multi-port switch) often by the coil of two or four transmit pories inside same assembly, Inside coil due to transformer can cause signal to interact, therefore adjacent transmit port will interfere with each other and affect signal quality.
Summary of the invention
An object of the present invention is to provide a kind of network equipment, and it utilizes across port near-end crosstalk arrester to eliminate interference among transmitting ports, to solve the problem in prior art.
Embodiments of the invention disclose a kind of network equipment eliminating interference among transmitting ports.This network equipment comprises multiple transmit port and at least one across port near-end crosstalk arrester.Should be coupled to a specific transmit port in the plurality of transmit port across port near-end crosstalk arrester, and be used for eliminating and disturb from the near-end crosstalk of other transmit port in the plurality of transmit port.This network equipment separately comprises a sample rate converter, is coupled to this across port near-end crosstalk arrester, is used for inputing to this input signal across port near-end crosstalk arrester to other transmit port in the plurality of transmit port and carries out sample rate conversion.Should be operate in time-domain or frequency domain across port near-end crosstalk arrester.This network equipment is an interchanger.
Embodiments of the invention disclose a kind of method eliminating interference among transmitting ports.The method comprises provides multiple transmit port; And elimination is disturbed from the near-end crosstalk of other transmit port in the plurality of transmit port except a specific transmit port.The method separately comprises carries out sample rate conversion to the input signal of other transmit port input in the plurality of transmit port except this specific transmit port.The method operates in time-domain or frequency domain.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that the present invention eliminates an embodiment of the network equipment of interference among transmitting ports;
Fig. 2 is the functional block diagram of an example of the receiver in the specific transmit port of shown in Fig. 1 corresponding to a special modality;
Fig. 3 is the functional block diagram of another example of the receiver in the specific transmit port of shown in Fig. 1 corresponding to a special modality;
Fig. 4 is the functional block diagram of another example again of the receiver in the specific transmit port of shown in Fig. 1 corresponding to a special modality;
Fig. 5 is the flow chart that the present invention eliminates an example operation of the method for interference among transmitting ports;
Fig. 6 is the flow chart that the present invention eliminates another example operation of the method for interference among transmitting ports; And
Fig. 7 is the flow chart that the present invention eliminates another example operation of the method for interference among transmitting ports.
Primary clustering symbol description
100 network equipments
A ~ H transmit port
110 transformers
A1 ~ A4, B1 ~ B4, C1 ~ C4, D1 ~ D4 passage
200,300,400 receivers
210 front-end processing blocks
212 automatic gain controllers
214 low pass filters
216 analog-digital converters
218 time sequence restoring circuits
230 echo cancellers
240 near-end crosstalk arresters
250 across port near-end crosstalk arrester
260 adders
270 adaptive processes circuit
S
i1first input signal
S
i2second input signal
S
p1first processing signals
S
o1first output signal
320 sample rate converters
420 circuit for detecting
502 ~ 516,610,710 steps
Embodiment
Please refer to Fig. 1, Fig. 1 is the schematic diagram that the present invention eliminates an embodiment of the network equipment 100 of interference among transmitting ports.Do not affecting under the technology of the present invention exposure, in the present embodiment, network equipment 100 is described with one 8 port interchangers (switch), it comprises eight transmit port A ~ H, and wherein each transmit port A ~ H respectively comprises four passages, and each passage is then made up of a coil, for example, transmit port A comprises passage A1 ~ A4, and transmit port B comprises channel B 1 ~ B4, by that analogy.A usual transmit port just needs a transformer (transformer), be used for filtering direct voltage, but, in order to save cost, manufacturer can the coil of two or four transmit pories inside same assembly, as shown in Figure 1, the coil of transmit port A, B, C, D is around in a transformer 110, thus, the coil of transmit port A, B, C, D can cause signal to affect each other, and adjacent transmit port will interfere with each other.
Note that above-mentioned network equipment 100 can be an interchanger, but be not limited thereto, also can be the network equipment of other kind.Moreover the number of transmit port and passage is only for example of the present invention is described, but not restrictive condition of the present invention.Please note, network equipment 100 can be applicable to 10M/100MBase-T system, 1GBase-T system or 10Gbase-T system, but the present invention is not limited thereto, also can be applicable to other network system again.These design variation all belong to category of the present invention.
If the signal attenuation that transmit port adjacent in transformer 110 causes is very serious, signal likely can be caused to break, therefore, when the interference of elimination one special modality, except interior near-end crosstalk (the nearend cross-talk from other passage of echo (echo) and same transmit port that must consider this special modality itself, NEXT) outward, also must consider that other transmit port causes across port near-end crosstalk (alien NEXT).
Please refer to Fig. 2, Fig. 2 is the functional block diagram of an example of the receiver 200 in the specific transmit port of shown in Fig. 1 corresponding to a special modality.Receiver 200 comprises (but being not limited to) front-end processing block 210, echo canceller 230, multiple near-end crosstalk arrester 240, at least one is across port near-end crosstalk arrester 250, adder 260 and an adaptive processes circuit 270.When receiver 200 receives one first input signal S
i1time, meeting first produces one second input signal S through the front-end processing of front-end processing block 210
i2in the present embodiment, front-end processing block 210 comprises an automatic gain controller (auto gain controller) 212, one low pass filter (low pass filter) 214, one analog-digital converter (analog-to-digital converter) 216 and a time sequence restoring circuit (timing recovery) 218, and automatic gain controller 212 is used for adjustment first input signal S
i1gain, low pass filter 214 is used for filter high frequency noise, and analog-digital converter 216 is used for performing the conversion of analog and digital signal, and time sequence restoring circuit 218 is used for restoration schedule to produce the second input signal S
i2.Suppose that this specific transmit port is for the transmit port A shown in Fig. 1, and this particular channel is channel A4, then echo canceller 230 is used to receive the echo from the conveyer of passage A4 own, multiple near-end crosstalk arrester 240 is used to receive from the near-end crosstalk of other passage A1, A2, A3 in transmit port A, and across port near-end crosstalk arrester 250 be used to receive from channel B 1 ~ B4, the C1 ~ C4 in other transmit port B, C, D, D1 ~ D4 across port near-end crosstalk.In an embodiment, altogether need an echo canceller 230, three near-end crosstalk arresters 240 and 12 across port near-end crosstalk arrester 250.
Adder 260 is coupled to the analog-digital converter 216 of front-end processing block 210, echo canceller 230, multiple near-end crosstalk arrester 240, across between port near-end crosstalk arrester 250 and adaptive processes circuit 270, is used for reception second input signal S
i2with echo canceller 230, near-end crosstalk arrester 240 and the signal that inputs across port near-end crosstalk arrester 250, and perform an add operation to produce one first processing signals S
p1, finally, adaptive processes circuit 270 is by the first processing signals S
p1carry out an adaptive processes to produce one first output signal S
o1.In an embodiment, adaptive processes circuit 270 can comprise a feed forward equalizer (feed forward equalizer, FFE), a digital resources obtainment device (DGAC), a filter and a feedback equalizer (feedback equalizer, FBE), but, this is restrictive condition of the present invention not, visual actual demand and increase or reduce other function circuit in adaptive processes circuit 270.
Please note, to operate in time-domain (time domain) across port near-end crosstalk arrester 250, or operate in frequency domain (frequency) through the conversion of mathematics formula, person familiar with the technology should understand, and this is restrictive condition of the present invention not.
Certainly, above-mentioned framework is applicable to adjacent transmit port to have identical frequency signal, but the present invention is not limited thereto, is also applicable to adjacent transmit port and has different frequency signals.Please refer to Fig. 3, Fig. 3 is the functional block diagram of another example of the receiver 300 in the specific transmit port of shown in Fig. 1 corresponding to a special modality.The receiver 300 of Fig. 3 is similar with the receiver 200 shown in Fig. 2, both separately comprise at least one sample rate converter (sample rateconverter in receiver 300 at different being in, SRC) 320, be coupled at least one across port near-end crosstalk arrester 250, be used for the input signal inputed to across port near-end crosstalk arrester 250 carries out sample rate conversion from other transmit port.Suppose that this specific transmit port is for the transmit port A shown in Fig. 1, and this particular channel is channel A4, then be used to receive from other transmit port B across port near-end crosstalk arrester 250, C, channel B 1 ~ B4 in D, C1 ~ C4, D1 ~ D4 across port near-end crosstalk, if transmit port B, C, D and transmit port A have identical frequency signal, the input signal then inputed to across port near-end crosstalk arrester 250 need not through the sample rate conversion of sample rate converter 320, if transmit port B, C, D and transmit port A have different frequency signals, the input signal then inputed to across port near-end crosstalk arrester 250 must first through the sample rate conversion of sample rate converter 320, just can be supplied to and use across port near-end crosstalk arrester 250.
In order to a nearly step save that cost but considers that other transmit port causes again simultaneously across port near-end crosstalk, visual actual demand and the quantity that adjusts across port near-end crosstalk arrester 250.Next, give some instances to illustrate the quantity how determined across port near-end crosstalk arrester 250.In the first instance, only need to consider that neighboring transmission port causes across port near-end crosstalk, suppose that this specific transmit port is for the transmit port A shown in Fig. 1, and this particular channel is channel A4, then across port near-end crosstalk arrester 250 be used to receive from the channel B 1 ~ B4 in other neighboring transmission port B across port near-end crosstalk, in in this case, altogether need four across port near-end crosstalk arrester 250; Suppose that this specific transmit port is for the transmit port B shown in Fig. 1, and this particular channel is channel B4, then across port near-end crosstalk arrester 250 be used to receive from the passage A1 ~ A4 in other neighboring transmission port A, C, C1 ~ C4 across port near-end crosstalk, in this case, eight are altogether needed across port near-end crosstalk arrester 250.As from the foregoing, if only consider that neighboring transmission port causes across port near-end crosstalk, then altogether need four (this specific transmit port is transmit port A, D) or eight (this specific transmit port is transmit port B, C) across port near-end crosstalk arrester 250,12 lacking across port near-end crosstalk arrester 250 comparatively originally.
In second example, only need to consider that hithermost passage in neighboring transmission port causes across port near-end crosstalk, suppose that this specific transmit port is for the transmit port A shown in Fig. 1, and this particular channel is channel A4, then across port near-end crosstalk arrester 250 be used to receive from hithermost channel B 1 in other neighboring transmission port B cause across port near-end crosstalk, in in this case, altogether need one across port near-end crosstalk arrester 250; Suppose that this specific transmit port is for the transmit port B shown in Fig. 1, and this particular channel is channel B4, then across port near-end crosstalk arrester 250 be used to receive from hithermost passage A4, C1 in other neighboring transmission port A, C cause across port near-end crosstalk, in in this case, altogether need two across port near-end crosstalk arrester 250.
As from the foregoing, if only consider that hithermost passage in neighboring transmission port causes across port near-end crosstalk, (this specific transmit port is transmit port A, D then altogether to need one, and this particular channel is channel A1 ~ A4, D1 ~ D4) or two (this specific transmit port is transmit port B, C, and this particular channel is channel B1 ~ B4, C1 ~ C4) across port near-end crosstalk arrester 250, more previous four or eight lack many across port near-end crosstalk arrester 250.
In above-mentioned second example, if directly cannot learn which passage is is passage hithermost in neighboring transmission port, then needs additionally to add a circuit for detecting and solve this problem.Please refer to Fig. 4, Fig. 4 is the functional block diagram of another example of the receiver 400 in the specific transmit port of shown in Fig. 1 corresponding to a special modality.The receiver 400 of Fig. 4 is similar with the receiver 200 shown in Fig. 2, both separately comprise a circuit for detecting 420 in receiver 400 at different being in, couple each passage of other transmit port, be used for detecting a signal quality parameter of each channel and the signal of which channel decided in other transmit port according to this signal quality parameter of each channel inputs to across port near-end crosstalk arrester 250.For example, this specific transmit port is the transmit port A shown in Fig. 1, and this particular channel is channel A4, then each channel B 1 ~ B4 of other transmit port B, C, D, C1 ~ C4, D1 ~ D4 are all coupled to circuit for detecting 420, and detect this signal quality parameter (such as a signal to noise ratio) of each channel, suppose that the signal to noise ratio detecting channel B1 is maximum, then judge that channel B 1 is as the channel near particular channel A4, and determine the signal of channel B1 it is input to across port near-end crosstalk arrester 250.Again for example, this specific transmit port is the transmit port B shown in Fig. 1, and this particular channel is channel B4, then each passage A1 ~ A4 of other transmit port A, C, D, C1 ~ C4, D1 ~ D4 are all coupled to circuit for detecting 420, and detect this signal quality parameter (such as a signal to noise ratio) of each channel, suppose that the signal to noise ratio detecting passage A4, C1 is maximum, then judge that passage A4, C1 are as the channel near particular channel B4, and determine the signal of channel A4, C1 it is input to across port near-end crosstalk arrester 250.
Note that above-mentioned signal quality parameter can be a signal to noise ratio (SNR), but the present invention is not limited thereto, also can be the signal quality parameter of other kind.
Above-mentioned example is only for application of the present invention is described, not restrictive condition of the present invention, person familiar with the technology should understand, without prejudice under spirit of the present invention, about how determining that across the various changes of the quantity of port near-end crosstalk arrester 320 be all feasible.In addition, sample rate converter 320 and circuit for detecting 420 are inessential assembly, also can omit or the assembly that can reach identical object by other replaces.
Please refer to Fig. 5.Fig. 5 is the flow chart that the present invention eliminates an example operation of the method for interference among transmitting ports, and it comprises following step (note that the following step and non-limiting will perform according to the order shown in Fig. 5):
Step 502: flow process starts.
Step 504: multiple transmit port is provided.
Step 506: the first input signal receiving a particular channel of a specific transmit port in the plurality of transmit port, and carry out front-end processing and produce one second input signal.
Step 508: the echo eliminating this special modality from this specific transmit port.
Step 510: the near-end crosstalk eliminated from other passage of this specific transmit port is disturbed.
Step 512: the near-end crosstalk eliminated from other transmit port in the plurality of transmit port except a specific transmit port is disturbed.
Step 514: carry out an adaptive processes.
Step 516: flow process terminates.
Next, will each step shown in Fig. 5 and each assembly shown in Fig. 1, Fig. 2 be coordinated to illustrate how to operate between each assembly.In step 504, multiple transmit port A ~ H is provided.In step 506, the first input signal S of a particular channel of a specific transmit port is received by front-end processing block 210
i1, and carry out front-end processing and produce the second input signal
si2.Suppose that this specific transmit port is transmit port A and this particular channel is channel A4, then, in step 508-512, adder receives the second input signal S
i2, the echo (echo canceller 230) from the special modality A4 of specific transmit port A, other channel (i.e. channel A1, A2, A3) from specific transmit port A near-end crosstalk interference (near-end crosstalk arrester 230) and disturb (across port near-end crosstalk arrester 250) from the near-end crosstalk of other the transmit port B in the plurality of transmit port A ~ H except specific transmit port A, C, D, and perform an add operation and disturb to eliminate these.In the step 514, adaptive processes circuit 270 can perform an adaptive processes by eliminating the signal after disturbing, and finally produces the first output signal S
o1.
Please refer to Fig. 6, Fig. 6 eliminates the flow chart of another example operation of the method for interference among transmitting ports, and it comprises following step (note that the following step and non-limiting will perform according to the order shown in Fig. 6):
Step 502: flow process starts.
Step 504: multiple transmit port is provided.
Step 506: the first input signal receiving a particular channel of a specific transmit port in the plurality of transmit port, and carry out front-end processing and produce one second input signal.
Step 508: the echo eliminating this special modality from this specific transmit port.
Step 510: the near-end crosstalk eliminated from other passage of this specific transmit port is disturbed.
Step 610: sample rate conversion is carried out to the input signal of other transmit port input in the plurality of transmit port except this specific transmit port.
Step 512: the near-end crosstalk eliminated from other transmit port in the plurality of transmit port except this specific transmit port is disturbed.
Step 514: carry out an adaptive processes.
Step 516: flow process terminates.
The step of Fig. 6 and the step of Fig. 5 similar, it is the alternate embodiment for Fig. 5, and what both were different is in separately increases a sample rate conversion step (i.e. step 610) in the middle of flow process in Fig. 6.Please to arrange in pairs or groups each assembly shown in Fig. 1, Fig. 3 about each step shown in Fig. 6, can understand between each assembly and how to operate.In step 610, sample rate converter 320 can carry out sample rate conversion to the input signal that other transmit port in the plurality of transmit port (i.e. input port B, C, D) inputs to across port near-end crosstalk arrester 320.About other step shown in Fig. 6, owing to repeating with the step of Fig. 5, relevant describe be described in detail in before, for repeating no more in this for purpose of brevity.
Please refer to Fig. 7, Fig. 7 eliminates the flow chart of another example operation again of the method for interference among transmitting ports, and it comprises following step (note that the following step and non-limiting will perform according to the order shown in Fig. 7):
Step 502: flow process starts.
Step 504: multiple transmit port is provided.
Step 506: the first input signal receiving a particular channel of a specific transmit port in the plurality of transmit port, and carry out front-end processing and produce one second input signal.
Step 508: the echo eliminating this special modality from this specific transmit port.
Step 510: the near-end crosstalk eliminated from other passage of this specific transmit port is disturbed.
Step 710: detect a signal quality parameter of each channel and the signal of which channel decided in other transmit port according to this signal quality parameter of each channel inputs to across port near-end crosstalk arrester.
Step 512: the near-end crosstalk eliminated from other transmit port in the plurality of transmit port except this specific transmit port is disturbed.
Step 514: carry out an adaptive processes.
Step 516: flow process terminates.
The step of Fig. 7 and the step of Fig. 5 similar, it is the alternate embodiment for Fig. 7, and what both were different is in separately increases a detecting step (i.e. step 710) in the middle of flow process in Fig. 7.Please to arrange in pairs or groups each assembly shown in Fig. 1, Fig. 4 about each step shown in Fig. 7, can understand between each assembly and how to operate.In step 720, circuit for detecting 420 can detect a signal quality parameter (such as a signal to noise ratio) of each channel and the signal of which channel decided in other transmit port (i.e. transmit port B, C, D) according to this signal quality parameter of each channel inputs to across port near-end crosstalk arrester 250.About other step shown in Fig. 7, owing to repeating with the step of Fig. 5, relevant describe be described in detail in before, for repeating no more in this for purpose of brevity.
Above-described embodiment is only used for technical characteristic of the present invention is described, is not used for limiting to category of the present invention.Letter, above-mentioned network equipment 100 can be an interchanger, but be not limited thereto, and also can be the network equipment of other kind.Moreover the number of transmit port and passage is only for example of the present invention is described, but not restrictive condition of the present invention.In addition, network equipment 100 can be applicable to 10M/100MBase-T system, 1GBase-T system or 10Gbase-T system, but the present invention is not limited thereto, also can be applicable to other network system.Above-mentioned front-end processing block 210 and adaptive processes circuit 270 are only for application of the present invention is described, not restrictive condition of the present invention, person familiar with the technology should understand, without prejudice under spirit of the present invention, the various changes of front-end processing block 210 and adaptive processes circuit 270 are all feasible.Note that across port near-end crosstalk arrester 250 be to operate in time-domain, or operate in frequency domain through the conversion of mathematics formula, person familiar with the technology should understand, and this is restrictive condition of the present invention not.Moreover framework of the present invention is not only applicable to adjacent transmit port and has identical frequency signal, through increase sample rate converter 320 in receiver 300, framework of the present invention is also applicable to adjacent transmit port and has different frequency signals.In addition, visual actual demand and the quantity adjusted across port near-end crosstalk arrester 320, person familiar with the technology should understand, without prejudice under spirit of the present invention, about how determining that across the various changes of the quantity of port near-end crosstalk arrester 320 be all feasible.Note that sample rate converter 320 and circuit for detecting 420 are is inessential assembly, also can omit or by other can reach identical order ground assembly replace.In addition, above-mentioned signal quality parameter can be a signal to noise ratio (SNR), but the present invention is not limited thereto, also can be the signal quality parameter of other kind.Please note, the step of above-mentioned flow process also non-limitingly will to perform according to the order shown in embodiment again, and without prejudice under spirit of the present invention, person familiar with the technology should be had with change.
As from the foregoing, the invention provides a kind of network equipment and the correlation technique thereof of eliminating interference among transmitting ports.Through increase at least one across port near-end crosstalk arrester in the receiver of network equipment, the interference (that is eliminating across port near-end crosstalk) from other transmit port can be eliminated, avoid the signal attenuation caused because of neighboring transmission port, and the problem causing signal to break.Moreover, through the application increasing sample rate converter, concept approximation of the present invention can be made to be applied to adjacent transmit port and to have in the framework of different frequency signals.In addition, in order to a nearly step save that cost but considers that other transmit port causes again simultaneously across port near-end crosstalk, visual actual demand and the quantity that adjusts across port near-end crosstalk arrester.If directly cannot learn which passage is is passage hithermost in neighboring transmission port, then additionally can add a circuit for detecting and solve this problem, thus, the network equipment of the elimination interference among transmitting ports disclosed by the present invention, not only can take into account the interference (echo and near-end crosstalk) eliminated in same transmit port, and the interference (across port near-end crosstalk) eliminated from other transmit port can be considered, to avoid the signal attenuation caused because of neighboring transmission port, and the problem causing signal to break, and the quantity that can pass through several mode to reduce across port crosstalk canceller, control cost further.
The foregoing is only embodiments of the invention, all equalizations done according to the claims in the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (9)
1. eliminate a network equipment for interference among transmitting ports, include:
Multiple transmit port; And
Front-end processing block, receives the first input signal of a special modality of a specific transmit port in the plurality of transmit port, and carries out front-end processing to produce one second input signal;
At least onely be coupled to this specific transmit port in the plurality of transmit port across port near-end crosstalk arrester (alien NEXT canceller), be used for eliminating and disturb from the near-end crosstalk of other transmit port in the plurality of transmit port; And
Adder, receive this second input signal, the echo from this special modality of this specific transmit port, the interference of the near-end crosstalk from other passage of this specific transmit port and the near-end crosstalk from other transmit port in the plurality of transmit port except this specific transmit port to disturb, and perform an add operation to eliminate these interference; And
Also comprise a sample rate converter, be coupled to this across port near-end crosstalk arrester, be used for that this input signal across port near-end crosstalk arrester is inputed to other transmit port in the plurality of transmit port and carry out sample rate conversion.
2. network equipment as claimed in claim 1, wherein in the plurality of transmit port, each transmit port includes multiple passage, should be coupled to a special modality in this specific transmit port across port near-end crosstalk arrester, and this network equipment separately comprises a circuit for detecting, couple each passage of other transmit port in the plurality of transmit port, be used for detecting a signal quality parameter of each passage and the signal of which passage decided in the plurality of transmit port in other transmit port according to this signal quality parameter of each passage inputs to this across port near-end crosstalk arrester.
3. network equipment as claimed in claim 2, wherein this signal quality parameter is a signal to noise ratio.
4. network equipment as claimed in claim 1 should be wherein operate in time-domain or frequency domain across port near-end crosstalk arrester.
5. network equipment as claimed in claim 1, it is applied to 10M/100MBase-T system, 1GBase-T system or 10Gbase-T system.
6. network equipment as claimed in claim 1, it is an interchanger.
7. eliminate a method for interference among transmitting ports, include:
Multiple transmit port is provided;
Receive the first input signal of a special modality of a specific transmit port in the plurality of transmit port, and carry out front-end processing to produce one second input signal; And
Eliminate and disturb from the near-end crosstalk of other transmit port in the plurality of transmit port except a specific transmit port,
Receive this second input signal, the echo from this special modality of this specific transmit port, the interference of the near-end crosstalk from other passage of this specific transmit port and the near-end crosstalk from other transmit port in the plurality of transmit port except this specific transmit port to disturb, and perform an add operation to eliminate these interference;
Also comprise: sample rate conversion is carried out to the input signal of other transmit port input in the plurality of transmit port except this specific transmit port.
8. method as claimed in claim 7, wherein in the plurality of transmit port, each transmit port includes multiple passage, and the method separately comprises:
Detect a signal quality parameter of each passage and decide the interference of which passage eliminated in the plurality of transmit port in other transmit port according to this signal quality parameter of each passage.
9. method as claimed in claim 8, wherein this signal quality parameter is a signal to noise ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810003801.8A CN101488780B (en) | 2008-01-15 | 2008-01-15 | Network apparatus for eliminating interference between transmission interfaces and method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810003801.8A CN101488780B (en) | 2008-01-15 | 2008-01-15 | Network apparatus for eliminating interference between transmission interfaces and method thereof |
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| CN101488780A CN101488780A (en) | 2009-07-22 |
| CN101488780B true CN101488780B (en) | 2014-12-17 |
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| CN103199892B (en) * | 2012-01-05 | 2016-09-07 | 瑞昱半导体股份有限公司 | Eliminate network equipment and the method for interference among transmitting ports |
| TWI528740B (en) | 2013-10-29 | 2016-04-01 | 瑞昱半導體股份有限公司 | Network apparatus with multiple transport ports |
| CN104601335B (en) * | 2013-11-01 | 2018-04-03 | 瑞昱半导体股份有限公司 | The network equipment of multiple transmission ports |
| CA3060088A1 (en) * | 2016-05-06 | 2017-11-09 | Genesis Technical Systems Corp. | Near-end crosstalk cancellation |
| TWI718808B (en) * | 2019-12-16 | 2021-02-11 | 瑞昱半導體股份有限公司 | Interference canceller and method for cancelling interference |
| TWI757142B (en) * | 2021-04-06 | 2022-03-01 | 瑞昱半導體股份有限公司 | Analog echo cancelation method |
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| US20060182014A1 (en) * | 2005-02-14 | 2006-08-17 | Texas Instruments Incorporated | Apparatus for and method of characterization of ethernet cable impairments |
| US7530854B2 (en) * | 2006-06-15 | 2009-05-12 | Ortronics, Inc. | Low noise multiport connector |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113098563A (en) * | 2019-12-23 | 2021-07-09 | 瑞昱半导体股份有限公司 | Interference canceller and interference cancellation method |
| CN113098563B (en) * | 2019-12-23 | 2022-11-11 | 瑞昱半导体股份有限公司 | Interference canceller and interference cancellation method |
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