CN102237893A - Signal processing equipment - Google Patents
Signal processing equipment Download PDFInfo
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- CN102237893A CN102237893A CN201010156302XA CN201010156302A CN102237893A CN 102237893 A CN102237893 A CN 102237893A CN 201010156302X A CN201010156302X A CN 201010156302XA CN 201010156302 A CN201010156302 A CN 201010156302A CN 102237893 A CN102237893 A CN 102237893A
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Abstract
The invention relates to signal processing equipment, and in particular relates to signal processing equipment for reducing the delay of a timing sequence recovery circuit in a communication system and improving the signal to noise ratio. The signal processing equipment comprises a first feedforward balancing unit, a first data partitioning unit, a second feedforward balancing unit and a second data partitioning unit, wherein the first feedforward balancing unit carries out compensation in accordance with a digital input signal to generate a first balancing signal; the first data partitioning unit is coupled with the first feedforward balancing unit and carries out compensation in accordance with the first balancing signal to generate a second balancing signal; and the second data partitioning unit is coupled with the second feedforward balancing unit and generates a second output signal in accordance with the second balancing signal.
Description
Technical field
The present invention relates to a kind of signal handling equipment, relate in particular to and a kind ofly can be used in a communication system reducing timing recovery loop-delay (timing recovery loop delay) and improve signal noise ratio (signal to noise ratio, signal handling equipment SNR).
Background technology
Generally speaking, in a wire transmission communication system (for example 10G Base-T system, Giga Ethernet (Ethernet) system or 10/100 Ethernet system), owing to can decay to some extent during the passage in this wire transmission communication system of signal process, so usually need a feed forward equalizer (feed forwardequalizer, FFE) or include a feed forward equalizer and a feedback equalizer (feedbackequalizer, FBE) (decision feedback equalizer DFE) eliminates channelling effect a decision feedback equalizer.
Summary of the invention
In view of this, one of purpose of the present invention is to provide a kind of and can be used for reducing timing recovery loop-delay (timing recovery loop delay) and improves signal to noise ratio (signal noise to ratio, signal handling equipment SNR) in a communication system.
According to claims of the present invention, it discloses a kind of signal handling equipment that is used for a communication system, this communication system includes at least one passage, this signal handling equipment includes: one first feed forward balancing unit, one first data partitioning unit, one second feed forward balancing unit and one second data partitioning unit, wherein, this first feed forward balancing unit is used for compensating to produce one first equalizing signal according to the digital input signals corresponding to this passage; This first data partitioning unit is coupled to this first feed forward balancing unit, and is used for producing one first output signal according to this first equalizing signal; This second feed forward balancing unit is coupled to this first data partitioning unit, and is used for compensating to produce one second equalizing signal according to this first equalizing signal; And this second data partitioning unit is coupled to this second feed forward balancing unit, and is used for producing one second output signal according to this second equalizing signal.
Description of drawings
What Fig. 1 illustrated is the schematic diagram of the signal handling equipment of one first embodiment of the present invention.
What Fig. 2 illustrated is the schematic diagram of the signal handling equipment of one second embodiment of the present invention.
What Fig. 3 illustrated is the schematic diagram of the signal handling equipment of one the 3rd embodiment of the present invention.
What Fig. 4 illustrated is the schematic diagram of the signal handling equipment of one the 4th embodiment of the present invention.
[main element symbol description]
100,200,300,400: signal handling equipment
210: analog/digital converter
220: the first feed forward balancing unit
230: the first data partitioning unit
240: the second feed forward balancing unit
250: the second data partitioning unit
260: the first adder units
270: the second adder units
280: interference cancellation module
290: the feedback equalization unit
295: the three adder units
Embodiment
In the middle of this specification and follow-up claims, used some vocabulary to censure specific element, and those skilled in the art should understand, hardware manufacturer may be called same element with different nouns, this specification and follow-up claims are not used as distinguishing the mode of element with the difference of title, but the criterion that is used as distinguishing with the difference of element on function, be an open term mentioned " including " in the middle of specification and follow-up claims in the whole text, so should be construed to [include but be not limited to], in addition, [coupling] speech refers to include any indirect means that are electrically connected that directly reach at this, therefore, if describe one first devices, coupled in one second equipment in the literary composition, then represent this first equipment can directly be electrically connected in this second equipment, or be electrically connected to this second equipment indirectly by other equipment or connection means.
The present invention relates to be arranged at a kind of signal handling equipment of a communication system inside, and this specification will illustrate some about using the embodiment of signal handling equipment of the present invention, but those skilled in the art should be able to recognize signal handling equipment of the present invention and also can be applied in the communication system of other various similar types, and the specific embodiment that is not limited in the following description to be provided or the particular electrical circuit framework of the technical characterictic of realizing these specific embodiments.
Generally speaking, signal handling equipment of the present invention can be applied in the communication system of any kind of, a kind of 10G Base-T system that is applied to include is disclosed in this manual, signal handling equipment in Giga Ethernet (Ethernet) system or the communication system of 10/100 Ethernet system, but this just is used to illustrate, rather than restrictive condition of the present invention, in addition, do not influencing under the disclosed situation of the technology of the present invention, in this specification utilization included 10G Base-T system, Giga Ethernet (Ethernet) system or the communication system of 10/100 Ethernet system illustrate the detailed architecture and the operating principle of signal handling equipment of the present invention as an example.
Please refer to Fig. 1, what Fig. 1 illustrated is the simplification block schematic diagram of the signal handling equipment 100 of one first embodiment of the present invention, and signal handling equipment 100 is used in the communication system (not shown), and this communication system includes a plurality of passage (not shown)s.As shown in Figure 1, signal handling equipment 100 includes an analog/digital converter (analog-to-digital converter, ADC) 210,1 first feed forward balancing unit 220, one first data partitioning unit 230, one second feed forward balancing unit 240, one second data partitioning unit 250, one first adder unit 260, one second adder unit 270, an interference cancellation module 280 and a feedback equalization unit 290, wherein, a number of taps of first feed forward balancing unit 220 (tap number) is less than a number of taps of second feed forward balancing unit 240.In addition, analog/digital converter 210 is coupled to one of them passage (not shown) of these a plurality of passages, and be used for an analog input signal (not shown) of this passage is carried out analog/digital conversion to produce a digital input signals (not shown), and first feed forward balancing unit 220 is used for according to carrying out a preliminary compensation corresponding to this digital input signals of this passage producing one first equalizing signal (not shown), and exports first equalizing signal to the first adder unit 260; First adder unit 260 is coupled to first feed forward balancing unit 220, first data partitioning unit 230, interference cancellation module 280 and feedback equalization unit 290, and is used for producing one the 3rd output signal (not shown) to the first data partitioning unit 230, second adder unit 270 and second feed forward balancing unit 240 according to an interference cancellation signals (not shown) of this first equalizing signal, interference cancellation module 280 outputs and a feedback equalization signal of feedback equalization unit 290 outputs; In addition, first data partitioning unit 230 is used for producing one first output signal (not shown) according to the 3rd output signal, and second adder unit 270 is coupled to first adder unit 260 and first data partitioning unit 230, and be used for producing one the 4th output signal (not shown) to interference cancellation module 280 according to the 3rd output signal and this first output signal, and interference cancellation module 280 is coupled to first adder unit 260 and second adder unit 270, and be used for producing interference cancellation signals to the first adder unit 260 according to the 4th output signal, please note at this, interference cancellation module 280 can include an echo canceller (echo canceller) (not shown) and a plurality of near-end crosstalk arrester (nearend crosstalk canceller, NEXT canceller) (not shown), wherein, this echo canceller is used to eliminate the interference of this passage, and these a plurality of near-end crosstalk arresters are used for eliminating the interference of other passage that comes from these a plurality of passages; In addition, second feed forward balancing unit 240 is used for carrying out the compensation of a thin portion to produce one second equalizing signal (not shown) according to the 3rd output signal, and second data partitioning unit 250 be coupled to second feed forward balancing unit 240, and be used for producing one second output signal (not shown) according to this second equalizing signal.In addition, please note at this, the above embodiments only illustrate as of the present invention, rather than restrictive condition of the present invention, for instance, feedback equalization unit 290 is not the necessary element of the signal handling equipment 200 among the present invention, therefore can optionally omit feedback equalization unit 290 under specific circumstances.
Please refer to Fig. 2, what Fig. 2 illustrated is the simplification block schematic diagram of the signal handling equipment 200 of one second embodiment of the present invention, signal handling equipment 200 equally also is to use in a communication system (not shown), and this communication system includes a plurality of passage (not shown)s.Wherein, by the signal handling equipment in the second embodiment of the present invention 200 be with the first embodiment of the present invention in signal handling equipment 100 have similar framework, therefore the subelement symbol of the signal handling equipment 200 in Fig. 2 uses and the same component symbol of signal handling equipment 100 among Fig. 1.As the signal handling equipment in the first embodiment of the present invention 100, signal handling equipment 200 in the second embodiment of the present invention also includes an analog/digital converter 210, one first feed forward balancing unit 220, one first data partitioning unit 230, one second feed forward balancing unit 240, one second data partitioning unit 250, one first adder unit 260, one second adder unit 270, one interference cancellation module 280 and a feedback equalization unit 290, in addition, signal handling equipment 300 includes one the 3rd adder unit 295 in addition, wherein, a number of taps of first feed forward balancing unit 220 equally also is the number of taps less than second feed forward balancing unit 240.Analog/digital converter 210 is coupled to one of them passage (not shown) of these a plurality of passages, and be used for an analog input signal (not shown) of this passage is carried out analog/digital conversion producing a digital input signals (not shown), and first feed forward balancing unit 220 is used for carrying out a preliminary compensation to produce one first equalizing signal (not shown) to the first adder unit 260 according to this digital input signals corresponding to this passage; First adder unit 260 is coupled to first feed forward balancing unit 220, first data partitioning unit 230 and interference cancellation module 280, and is used for producing one the 3rd output signal (not shown) to the first data partitioning unit 230, second adder unit 270 and second feed forward balancing unit 240 according to an interference cancellation signals (not shown) of this first equalizing signal and interference cancellation module 280; In addition, first data partitioning unit 230 is used for producing one first output signal (not shown) according to the 3rd output signal, and second adder unit 270 is coupled to first adder unit 260 and first data partitioning unit 230, and be used for producing one the 4th output signal (not shown) to interference cancellation module 280 according to the 3rd output signal and this first output signal, and interference cancellation module is coupled to first adder unit 260 and second adder unit 270, and be used for producing this interference cancellation signals to the first adder unit 260 according to the 4th output signal, please note at this, interference cancellation module 280 can include an echo canceller (echo canceller) (not shown) and a plurality of near-end crosstalk arrester (near end crosstalkcanceller, NEXT canceller) (not shown), wherein, this echo canceller is used to eliminate the interference of this passage, and these a plurality of near-end crosstalk arresters are used for eliminating the interference of other passage that comes from these a plurality of passages; In addition, second feed forward balancing unit 240 is used for carrying out the compensation of a thin portion to produce one second equalizing signal (not shown) according to the 3rd output signal, and the 3rd adder unit 295 is coupled to second feed forward balancing unit 240, feedback equalization unit 290 and second data partitioning unit 250, wherein, the 3rd adder unit 295 produces one the 5th output signal (not shown) according to a feedback equalization signal of second equalizing signal and feedback equalization unit 290, and second data partitioning unit 250 produces one second output signal (not shown) according to the 5th output signal.In addition, please note at this, the above embodiments only illustrate as of the present invention, rather than restrictive condition of the present invention, for instance, feedback equalization unit 290 and the 3rd adder unit 295 are not the necessary element of the signal handling equipment 300 among the present invention, therefore can optionally omit feedback equalization unit 290 and the 3rd adder unit 295 under specific circumstances.
Please refer to Fig. 3, what Fig. 3 illustrated is the simplification block schematic diagram of the signal handling equipment 300 of one the 3rd embodiment of the present invention, signal handling equipment 300 equally also is to use in a communication system (not shown), and this communication system includes at least one passage (not shown).Wherein, by the signal handling equipment in the third embodiment of the present invention 300 be with the second embodiment of the present invention in signal handling equipment 200 have similar framework, therefore the component symbol of the signal handling equipment 300 in Fig. 3 uses and the same component symbol of signal handling equipment 200 among Fig. 2.As the signal processing apparatus in the second embodiment of the present invention 200, signal handling equipment 300 in the third embodiment of the present invention also includes an analog/digital converter 210, one first feed forward balancing unit 220, one first data partitioning unit 230, one second feed forward balancing unit 240, one second data partitioning unit 250, one first adder unit 260, one second adder unit 270, one interference cancellation module 280, one feedback equalization unit 290 and one the 3rd adder unit 295, wherein, a number of taps of first feed forward balancing unit 220 equally also is the number of taps less than second feed forward balancing unit 240.Analog/digital converter 210 is coupled to one of them passage (not shown) of these a plurality of passages, and be used for an analog input signal (not shown) of this passage is carried out analog/digital conversion to produce a digital input signals (not shown), and first adder unit 260 is coupled to first feed forward balancing unit 220, interference cancellation module 280 and analog/digital converter 210, and is used for producing one the 3rd output signal (not shown) to the first feed forward balancing unit 220 according to an interference cancellation signals (not shown) and this digital input signals; First feed forward balancing unit 220 is used for carrying out a preliminary compensation to produce one first equalizing signal (not shown) to the first data partitioning unit 230, second adder unit 270 and second feed forward balancing unit 240 according to the 3rd output signal, and first data partitioning unit 230 is coupled to first feed forward balancing unit 220, and is used for producing one first output signal (not shown) according to this first equalizing signal; Second adder unit 270 is coupled to first feed forward balancing unit 220 and first data partitioning unit 230, and be used for producing one the 4th output signal (not shown) to interference cancellation module 280 according to this first equalizing signal and this first output signal, and interference cancellation module 280 is coupled to first adder unit 260 and second adder unit 270, and be used for producing this interference cancellation signals to the first adder unit 260 according to the 4th output signal, please note at this, interference cancellation module 280 can include an echo canceller (echo canceller) (not shown) and a plurality of near-end crosstalk arrester (near end crosstalk canceller, NEXT canceller) (not shown), wherein, this echo canceller is used to eliminate the interference of this passage, and these a plurality of near-end crosstalk arresters are used for eliminating the interference of other passage that comes from these a plurality of passages; In addition, second feed forward balancing unit 240 is used for carrying out the compensation of a thin portion to produce one second equalizing signal (not shown) according to this first equalizing signal, and the 3rd adder unit 295 is coupled to second feed forward balancing unit 240, feedback equalization unit 290 and second data partitioning unit 250, wherein, the 3rd adder unit 295 produces one the 5th output signal (not shown) according to a feedback equalization signal of second equalizing signal and feedback equalization unit 290, and second data partitioning unit 250 produces one second output signal (not shown) according to the 5th output signal.In addition, please note at this, the above embodiments only illustrate as of the present invention, rather than restrictive condition of the present invention, for instance, feedback equalization unit 290 and the 3rd adder unit 295 are not the necessary element of the signal handling equipment 300 among the present invention, therefore can optionally omit feedback equalization unit 290 and the 3rd adder unit 295 under specific circumstances.
Please refer to Fig. 4, what Fig. 4 illustrated is the simplification block schematic diagram of the signal handling equipment 400 of one the 4th embodiment of the present invention, signal handling equipment 400 equally also is to use in a communication system (not shown), and this communication system includes at least one passage (not shown).Wherein, by the signal handling equipment in the fourth embodiment of the present invention 400 be with the third embodiment of the present invention in signal handling equipment 300 have similar framework, therefore the component symbol of the signal handling equipment 400 in Fig. 4 uses and the same component symbol of signal handling equipment 400 among Fig. 3.As the signal handling equipment in the third embodiment of the present invention 300, signal handling equipment 400 in the fourth embodiment of the present invention also includes an analog/digital converter 210, one first feed forward balancing unit 220, one first data partitioning unit 230, one second feed forward balancing unit 240, one second data partitioning unit 250, one first adder unit 260, one second adder unit 270, one interference cancellation module 280, one feedback equalization unit 290 and one the 3rd adder unit 295, wherein, a number of taps of first feed forward balancing unit 220 equally also is the number of taps less than second feed forward balancing unit 240.Analog/digital converter 210 is coupled to one of them passage (not shown) of these a plurality of passages, and be used for an analog input signal (not shown) of this passage is carried out analog/digital conversion to produce a digital input signals (not shown), and first adder unit 260 is coupled to first feed forward balancing unit 220, interference cancellation module 280 and analog/digital converter 210, and is used for producing one the 3rd output signal (not shown) to the first feed forward balancing unit 220 according to an interference cancellation signals (not shown) and this digital input signals; First feed forward balancing unit 220 is used for carrying out a preliminary compensation to produce one first equalizing signal (not shown) to the, three adder units 295 according to the 3rd output signal, and the 3rd adder unit 295 is coupled to first feed forward balancing unit 220, feedback equalization unit 290, second adder unit 270, second feed forward balancing unit 240 and first data partitioning unit 230, wherein, the 3rd adder unit 295 produces one the 5th output signal (not shown) to the second adder unit 270 according to a feedback equalization signal of this first equalizing signal and feedback equalization unit 290, second feed forward balancing unit 240 and first data partitioning unit 230, and first data partitioning unit 230 produces one first output signal (not shown) to the second adder unit 270 according to the 5th output signal, and second adder unit 270 produce one the 4th output signal (not shown) to interference cancellation module 280 according to the 5th output signal and this first output signal, and interference cancellation module 280 is coupled to first adder unit 260 and second adder unit 270, and be used for producing this interference cancellation signals to the first adder unit 260 according to the 4th output signal, please note at this, interference cancellation module 280 can include an echo canceller (echo canceller) (not shown) and a plurality of near-end crosstalk arrester (near end crosstalk canceller, NEXT canceller) (not shown), wherein, this echo canceller is used to eliminate the interference of this passage, and these a plurality of near-end crosstalk arresters are used for eliminating the interference of other passage that comes from these a plurality of passages; In addition, second feed forward balancing unit 240 is carried out the compensation of a thin portion to produce one second equalizing signal (not shown) to the second data partitioning unit according to the 5th output signal, and second data partitioning unit 250 be coupled to second feed forward balancing unit 240, and be used for producing one second output signal (not shown) according to this second equalizing signal.In addition, please note at this, the above embodiments only illustrate as of the present invention, rather than restrictive condition of the present invention, for instance, feedback equalization unit 290 is not the necessary element of the signal handling equipment 200 among the present invention, therefore can optionally omit feedback equalization unit 290 under specific circumstances.
In sum, because signal handling equipment disclosed in this invention includes short long second feed forward balancing unit (that is a number of taps of first feed forward balancing unit is less than number of taps of second feed forward balancing unit) of first feed forward balancing unit and, has the framework in preface recovery loop (timing recovery loop) more in short-term to constitute one, therefore can be used in a communication system, reducing timing recovery loop-delay (timing recovery loop delay), and can improve signal to noise ratio (signal to noise ratio, SNR).
The above only is embodiments of the invention, and all equalizations of doing according to claims of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (10)
1. signal handling equipment that is used for a communication system, this communication system includes at least one passage, and this signal handling equipment includes:
One first feed forward balancing unit is used for compensating to produce one first equalizing signal according to the digital input signals corresponding to this passage;
One first data partitioning unit is coupled to this first feed forward balancing unit, is used for producing one first output signal according to this first equalizing signal;
One second feed forward balancing unit is coupled to this first data partitioning unit, is used for compensating to produce one second equalizing signal according to this first equalizing signal; And
One second data partitioning unit is coupled to this second feed forward balancing unit, is used for producing one second output signal according to this second equalizing signal.
2. signal handling equipment as claimed in claim 1, wherein a number of taps of this first feed forward balancing unit is less than a number of taps of this second feed forward balancing unit.
3. signal handling equipment as claimed in claim 1, other includes:
One first adder unit, be coupled to this first feed forward balancing unit and this first data partitioning unit between, be used for producing one the 3rd and output signal to this first data partitioning unit and this second feed forward balancing unit according to this first equalizing signal and an interference cancellation signals;
One second adder unit, be coupled to this first adder unit and this first data partitioning unit between, be used for producing one the 4th output signal according to the 3rd output signal and this first output signal; And
One interference cancellation module, be coupled to this first adder unit and this second adder unit between, be used for producing this interference cancellation signals to this first adder unit according to the 4th output signal.
4. signal handling equipment as claimed in claim 3, other includes:
One feedback equalization unit is coupled to this first adder unit;
Wherein this first adder unit produces the 3rd output signal according to a feedback equalization signal of this first equalizing signal, this interference cancellation signals and this feedback equalization unit.
5. signal handling equipment as claimed in claim 3, other includes:
One the 3rd adder unit, be coupled to this second feed forward balancing unit and this second data partitioning unit between; And
One feedback equalization unit is coupled to the 3rd adder unit;
Wherein the 3rd adder unit produces one the 5th output signal according to a feedback equalization signal of this second equalizing signal and this feedback equalization unit, and this second data partitioning unit produces this second output signal according to the 5th output signal.
6. signal handling equipment as claimed in claim 3, wherein this communication system includes a plurality of passages, and this interference cancellation module includes:
One echo canceller is used to eliminate the interference of this passage; And
At least one near-end crosstalk arrester is used to eliminate the interference from other passage.
7. signal handling equipment as claimed in claim 1, other includes:
One analog/digital converter is coupled to this passage, is used for an analog input signal of this passage is carried out analog/digital conversion to produce this digital input signals;
One first adder unit is coupled between this first feed forward balancing unit and this analog/digital converter, is used for producing one the 3rd according to an interference cancellation signals and this digital input signals and outputs signal to this first feed forward balancing unit;
One second adder unit, be coupled to this first adder unit and this first data partitioning unit between, be used for producing one the 4th output signal according to this first equalizing signal and this first output signal; And
One interference cancellation module, be coupled to this first adder unit and this second adder unit between, be used for producing this interference cancellation signals to this first adder unit according to the 4th output signal.
8. signal handling equipment as claimed in claim 7, other includes:
One the 3rd adder unit, be coupled to this second feed forward balancing unit and this second data partitioning unit between; And
One feedback equalization unit is coupled to the 3rd adder unit;
Wherein the 3rd adder unit produces one the 5th output signal according to the feedback equalization signal that this second equalizing signal and this feedback equalization unit are produced, and this second data partitioning unit produces this second output signal according to the 5th output signal.
9. signal handling equipment as claimed in claim 7, other includes:
One the 3rd adder unit, be coupled to this first feed forward balancing unit and this first data partitioning unit between; And
One feedback equalization unit is coupled to the 3rd adder unit;
Wherein the 3rd adder unit produces one the 5th output signal according to a feedback equalization signal of this first equalizing signal and this feedback equalization unit, and this first data partitioning unit produces this first output signal according to the 5th output signal, and this second feed forward balancing unit compensates according to the 5th output signal and produces this second equalizing signal, and this second adder unit produces the 4th output signal according to the 5th output signal and this first output signal.
10. signal handling equipment as claimed in claim 7, wherein this communication system includes a plurality of passages, and this interference cancellation module includes:
One echo canceller is used to eliminate the interference of this passage; And
At least one near-end crosstalk arrester is used to eliminate the interference from other passage.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010156302XA CN102237893A (en) | 2010-04-26 | 2010-04-26 | Signal processing equipment |
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| CN201010156302XA CN102237893A (en) | 2010-04-26 | 2010-04-26 | Signal processing equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112564733A (en) * | 2019-09-25 | 2021-03-26 | 瑞昱半导体股份有限公司 | Electronic system with radio frequency interference elimination mechanism and related radio frequency interference elimination method |
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2010
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112564733A (en) * | 2019-09-25 | 2021-03-26 | 瑞昱半导体股份有限公司 | Electronic system with radio frequency interference elimination mechanism and related radio frequency interference elimination method |
| CN112564733B (en) * | 2019-09-25 | 2022-03-11 | 瑞昱半导体股份有限公司 | Electronic system with radio frequency interference cancellation mechanism and related radio frequency interference cancellation method |
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Application publication date: 20111109 |