CN101808059B - Single carrier/multi-carrier share receiver - Google Patents
Single carrier/multi-carrier share receiver Download PDFInfo
- Publication number
- CN101808059B CN101808059B CN 200910006696 CN200910006696A CN101808059B CN 101808059 B CN101808059 B CN 101808059B CN 200910006696 CN200910006696 CN 200910006696 CN 200910006696 A CN200910006696 A CN 200910006696A CN 101808059 B CN101808059 B CN 101808059B
- Authority
- CN
- China
- Prior art keywords
- frequency
- signal
- domain
- time
- balanced
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The invention provides a single carrier/multi-carrier share receiver which comprises a first discrete Fourier transform unit, a first frequency domain equalizer, an anti-discrete Fourier transform unit, a cutter and an equalizer compensation circuit, wherein the first discrete Fourier transform unit is used for generating a frequency domain signal according to received receiving signals; the first frequency domain equalizer is used for generating a first equalized frequency domain signal according to the frequency domain signal; the anti-discrete Fourier transform unit is used for generating a first equalized time domain signal according to the first equalized frequency domain signal; the cutter is used for generating a cut time domain signal according to the first equalized time domain signal; and the equalizer compensation circuit is used for compensating the first equalized time domain signal according to at least the cut time domain signal.
Description
Technical field
The present invention is relevant with the receiver of digital television system, the espespecially a kind of single carrier/multi-carrier share receiver that can support simultaneously multi-carrier mode and single carrier mode with and related signal processing method, it shares the color noise (color noise) of the single-carrier signal of receiver by using compensation circuit (such as the equalizer compensating circuit) dynamically to suppress single carrier/pair carrier wave, advance to promote the communication quality that single carrier/pair carrier wave is shared receiver.
Background technology
Digital television system has become one of trend of modern development in science and technology, and general television system can further be divided into again single carrier (single carrier) pattern and multicarrier (multi carrier) pattern; And the cover specification that digital TV ground multimedia broadcasting (Digital Terrestrial MultimediaBroadcasting, DTMB) is worked out for the People's Republic of China (PRC), it allows single carrier mode and multi-carrier mode simultaneously and the standard of depositing for a kind of.
By aforementioned standard, can make single-carrier signal be able to share identical hardware (such as single carrier/multi-carrier share receiver) with multi-carrier signal and satisfy in response to and gives birth to, by only overlapping the circuit cost that hardware structure is saved receiver with one.
Yet, under single carrier mode and since single carrier/pair carrier wave share receiver and smoothly its single carrier of filtering receive noise among signal y (t), therefore badly influence in the shared receiver quality of signal during single carrier mode.
Summary of the invention
Therefore, one of purpose of the present invention namely solves the problem of aforementioned known techniques and proposes a kind of single carrier/multi-carrier share receiver, so that the reception signal of processing via single carrier/multi-carrier share receiver avoids suffering the color noise jamming and has influence on signal quality.
According to one embodiment of the invention, it discloses a kind of single carrier/multi-carrier share receiver.This single carrier/multi-carrier share receiver includes: the first discrete Fourier transform unit, the first frequency-domain equalizer, anti-discrete Fourier transform unit, cutter and equalizer compensating circuit.This first discrete Fourier transform unit is carried out discrete Fourier transform (DFT) to produce frequency-region signal in order to this reception signal that receives according to this single carrier/multi-carrier share receiver; This first frequency-domain equalizer is coupled to this discrete Fourier transform unit, in order to carry out equilibrium treatment according to this frequency-region signal to produce the first balanced rear frequency-region signal; This anti-discrete Fourier transform unit is coupled to this first frequency-domain equalizer, in order to carry out anti-Discrete Fourier transform operation to produce the first balanced rear time-domain signal according to this first balanced rear frequency-region signal; This cutter is coupled to this anti-discrete Fourier transform unit, in order to carry out the cutting running to produce the rear time-domain signal of cutting according to this first balanced rear time-domain signal; And this equalizer compensating circuit is in order to compensate afterwards frequency-region signal of this first equilibrium according to time-domain signal after this cutting at least.
According to another embodiment of the present invention, it also discloses the method for the reception signal that a kind of processing single-carrier/multi-carrier share receiver receives.The method includes following steps: carry out discrete Fourier transform (DFT) to produce frequency-region signal according to this reception signal; Carry out the first equilibrium treatment to produce the first balanced rear frequency-region signal according to this frequency-region signal; Carry out anti-Discrete Fourier transform operation to produce the first balanced rear time-domain signal according to this first balanced rear frequency-region signal; Carry out the cutting running to produce the rear time-domain signal of cutting according to this first balanced rear time-domain signal; And compensate afterwards frequency-region signal of this first equilibrium according to time-domain signal after this cutting at least.
Description of drawings
Fig. 1 is the block schematic diagram of the first embodiment of single carrier/multi-carrier share receiver of the present invention.
Fig. 2 is the block schematic diagram of another embodiment of single carrier/multi-carrier share receiver of the present invention.
Fig. 3 is the method flow diagram that the present invention is applied to receive to eliminate single carrier in the single carrier/multi-carrier share receiver color noise of signal.
[main element label declaration]
100,200 single carriers/pair carrier wave is shared receiver
110,210 first discrete Fourier transform unit
120,220 first frequency-domain equalizers
130 second frequency-domain equalizers
140,230 anti-discrete Fourier transform unit
150,250 cutters
160 second discrete Fourier transform unit
170,260 coefficient adjusting circuits
180,270 equalizer compensating circuits
240 time-domain equalizers
Embodiment
In the middle of patent specification and above-mentioned claim, used some vocabulary to censure specific element.The person with usual knowledge in their respective areas should understand, and hardware manufacturer may be called same element with different nouns.This specification and above-mentioned claim 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 open term mentioned " comprising " in the middle of specification and the above-mentioned request item in the whole text, so should be construed to " comprise but be not limited to ".In addition, " coupling " word is to comprise any means that indirectly are electrically connected that directly reach at this.Therefore, be coupled to the second device if describe first device in the literary composition, then represent this first device and can directly be electrically connected in this second device, or indirectly be electrically connected to this second device by other device or connection means.
Fig. 1 is the block schematic diagram of the first embodiment of single carrier/multi-carrier share receiver of the present invention.In the present embodiment, single carrier/multi-carrier share receiver 100 can be supported single carrier mode and two carrier mode, as shown in Figure 1, single carrier/multi-carrier share receiver 100 includes (but not limiting) first discrete Fourier transform unit 110, the first frequency-domain equalizer 120, anti-discrete Fourier transform unit 140, cutter 150 and equalizer compensating circuit 180.
In addition, in the present embodiment, have (but not limiting) second frequency-domain equalizer 130, the second discrete Fourier transform unit 160 in the equalizer compensating circuit 180 and in order to the coefficient adjusting circuit 170 of the coefficient (can be expressed as W ' (f)) of adjusting the second frequency-domain equalizer 130.
In the present embodiment, arranging of equalizer compensating circuit 180 mainly is in frequency domain the first balanced rear signal X (f) via 120 outputs of the first frequency-domain equalizer to be done compensation, to eliminate the first balanced rear signal X (signal noise in (f) (comprising above-mentioned color noise) by the computing of related algorithm, so that finally by the time-domain signal that is produced by cutter 150, that is frequency signal d (t) after the cutting, can be similar to the fundamental frequency signal (can be expressed as z (t), not be shown among Fig. 1) that transmits the transmission end.
General in the receiver system of single-carrier signal special use, because mainly carrying out signal in time domain, it processes, so the known technology interference that can easily passage be caused via time-domain equalizer and filtering.Yet, single-carrier signal is in case go to frequency domain via Fourier transform (as the aforementioned Discrete Fourier transform operation) by time domain, can't be smoothly by estimating the frequency domain channel response and then obtain complete signal (that is transmission end transmit signal z (t)), thereby cause known single carrier/multi-carrier share receiver under single carrier mode, to have not good single-carrier signal quality.
In the present embodiment, to compensate via the second frequency-domain equalizer 130 that rear the first balanced rear frequency domain signal X (f) that produces of the first frequency-domain equalizer 120 processing is transferred to another capable of dynamic adjustment coefficient, to compensate the nonideal characteristic of the first frequency-domain equalizer 120 by algorithm.
Specifically, in this first embodiment, can be by behind the first frequency-domain equalizer 120, coupling the second frequency-domain equalizer 130, and calculate the coefficient (can be expressed as W ' (f)) of the second frequency-domain equalizer 130 via feedback framework (as: feedback mechanism that is consisted of by the second frequency-domain equalizer 130, anti-discrete Fourier transform unit 140, cutter 150, the second discrete Fourier transform unit 160 and coefficient adjusting circuit 170)).Thus, can be so that the signal of single carrier/multi-carrier share receiver 100 output (that is time-domain signal (d (t)) can level off to the transmission signal z (t) that the transmission end transmits after the cutting.
In other words, via using equalizer compensating circuit 180 (such as the second frequency-domain equalizer 130, coefficient adjusting circuit 170 and the second discrete Fourier transform unit 160) running, so that can support the single carrier/multi-carrier share receiver 100 of single carrier mode and multi-carrier mode not only to be used a cover hardware to support two kinds of carrier modes, also promoted the quality of its single-carrier signal when single carrier mode.
Please continue to consult Fig. 1, next will further specify the relevant running of single carrier/multi-carrier share receiver 100 of the present invention.In this first embodiment, suppose: the coefficient of the first frequency-domain equalizer 120 is W (f), it is y (t) that single carrier receives signal, then carry out Discrete Fourier transform operation via the first discrete Fourier transform unit 110 and obtain frequency-region signal Y (f), via coefficient be the first frequency-domain equalizer 120 of W (f) carry out producing after the equilibrium treatment first balanced after frequency domain signal X (f), it can mathematical expression (1) expression:
X(f)＝W(f)*Y(f)
(1)
Receive color noise in the signal owing to only use the first frequency-domain equalizer 120 can't eliminate single carrier fully, thus the present invention by algorithm with use another equalizer (for example the second frequency-domain equalizer 130) come balanced to first after frequency domain signal X (f) compensate.In simple terms, the coefficient of supposing the second frequency-domain equalizer 130 be W ' (f), after then balanced with first frequency domain signal X (f) carry out another equilibrium treatment via the second frequency-domain equalizer 130 and produce second balanced after frequency domain signal X ' (f), this second balanced after frequency domain signal X ' (f) can mathematical expression (2) expression:
X′(f)＝W′(f)*X(f)(2)
The second balanced rear frequency domain signal X ' (f) more produce time-domain signals via anti-discrete Fourier transform unit 140, can be expressed as the balanced rear time-domain signal x ' of first among Fig. 1 (t).The cutter 150 then rear time-domain signal x ' of foundation the first equilibrium (t) is carried out the cutting computing to produce the rear time-domain signal (that is d of Fig. 1 (t)) of cutting.
In this first embodiment, the first frequency-domain equalizer 120 and the second frequency-domain equalizer 130 are respectively sef-adapting filter (adaptive filter), therefore dynamically adjust its coefficient.In one embodiment of this invention, the coefficient of the first frequency-domain equalizer 120 can adopt the mode of least mean-square error (Minimum MeanSquared Error, MMSE) to try to achieve.For example, the time-domain signal of transmission end is expressed as z (t), and the fundamental frequency signal of receiving terminal (receiving signal y (t) such as single carrier) can be considered a function relevant with time domain channel response h (t) and noise n (t):
y(t)＝con(h(t)，z(t))+n(t)(3)
And the frequency domain representation formula of mathematical expression (3) is:
Y(f)＝H(f)*Z(f)+N(f)(4)
Wherein, the coefficient W (f) of the first frequency-domain equalizer 120 can be obtained via the desired value computing:
E{|Z(f)-W(f)*Y(f)|
2}(5)
If adopt the least mean-square error computing, can be obtained by mathematical expression (5) the coefficient W (f) of the first frequency-domain equalizer 120:
Wherein: H
*(f) be the conjugate complex number of frequency domain channel response H (f), K is constant, and desired value: E[|N (f) |
2] be to be proportional to noise energy.
Because in single carrier/multi-carrier share receiver 100, the signal of single carrier mode (single carrier receives signal y (t)) is converted into frequency domain (Y (f)) afterwards, the noise N (f) of frequency domain is simple white noise.Note that, often have influence on the signal quality of its single-carrier signal owing to the very difficult exactly computing of the energy of N (f) in frequency domain, so in the present invention, adopt the mode of equalizer compensating circuit (such as equalizer compensating circuit 180), further guarantee under single carrier mode the signal (consistency of the transmission signal z (t) that transmit time-domain signal (d (t)) and transmission end after the cutting of single carrier/multi-carrier share receiver 100 outputs by the mode that adopts mathematical operation the rear frequency domain signal X (f) of the first equilibrium is done further compensation operation.
Please continue to consult Fig. 1, in the present embodiment, the coefficient W ' of the second frequency-domain equalizer 130 (f) can be obtained via the desired value computing:
E{|D(f)-W′(f)*X(f)|
2}(7)
In the present embodiment, be example if adopt the lowest mean square computing, the coefficient W ' that then can obtain the second frequency-domain equalizer 130 by mathematical expression (7) (f):
E[X(f)*(D(f)-W′(f)*X(f))](8)
In the another embodiment of the present invention, suppose the second frequency-domain equalizer 130 of the shared receiver 100 of single carrier/pair carrier wave, its coefficient W ' initial value (f) is made as 1, and the coefficient W ' that supposes to adjust second frequency-domain equalizer 130 in each block (block) is (f), then this moment the second frequency-domain equalizer 130 coefficient W ' adjustment (f) can be expressed as follows by mathematical expression (9):
Wn′(f)＝W
n-1′(f)+stepsize*X(f)*conj(D(f)-X′(f))(9)
Wherein: after the cutting frequency-region signal D (f) for cutting after the frequency domain representation formula of frequency d (t) signal, it is to carry out anti-discrete Fourier transform (DFT) and produce via the second discrete Fourier transform unit 160.Computing and related hardware framework via aforementioned exposure can converge to the coefficient W ' of one group of second frequency-domain equalizer 130 (f), so that (f) * X (f) of E{|D (f)-W ' |
2Be minimized, and then guaranteed signal quality via frequency signal d (t) after the cutting of cutter 150 output.
By equalizer compensating circuit 180 of the present invention, single carrier/multi-carrier share receiver 120 is able to when noise signal N (f) is larger, dynamically adjusted corresponding W ' (f), (that is to say: when N (f) is excessive by separating mathematical expression (7) with the W ' that obtains having smaller value (f)).In other words, by using algorithm and corresponding hardware structure, equalizer compensating circuit 180 is able to that signal after the equilibrium is done compensation and is subjected to frequency signal d (t) to obtain better cutting, and then promotes the usefulness of single carrier/multi-carrier share receiver 100.
Note that aforesaid exposure is not one of restrictive condition of the present invention for using of explanation only.For instance, under spirit of the present invention, in other embodiment, also can carry out corresponding circuit framework adjustment via suitable design.
See also Fig. 2, Fig. 2 is the block schematic diagram of the second embodiment of single carrier/multi-carrier share receiver of the present invention.Single carrier/multi-carrier share receiver 200 can be supported single carrier mode and two carrier mode, in this second embodiment, equalizer compensating circuit 270 is a circuit that carries out computing in time domain, be used in the time domain the first balanced rear signal X (f) via 220 outputs of the first frequency-domain equalizer be done adequate compensation, with the noise in the elimination/deamplification.
As shown in Figure 2, equalizer compensating circuit 270 includes (but not limiting): time-domain equalizer 240 and coefficient adjusting circuit 260.Wherein time-domain equalizer 240 is coupled between anti-discrete Fourier transform unit 230 and the cutter 250, comes the first balanced rear frequency domain signal X (f) of processing via the first frequency-domain equalizer 220 is done compensation in order to the output signal (the first balanced rear time-domain signal x (t)) according to frequency signal d (t) and anti-discrete Fourier transform unit 230 after the cutting of being exported by cutter 250.
In Fig. 2, the first frequency-domain equalizer 220 and time-domain equalizer 240 are sef-adapting filter, and the coefficient W (f) of the first frequency-domain equalizer is will be to obtain according to frequency domain channel response H (f).Time-domain equalizer 240 is via the coefficient (can be expressed as w ' (t)) of single carrier/multi-carrier share receiver 200 control coefrficient Circuit tunings 260 with dynamic adjustment time-domain equalizer.
Since the framework of single carrier/multi-carrier share receiver 200 shown in Figure 2 with and operating principle be same as haply single carrier/multi-carrier share receiver shown in Figure 1 100, and both main difference parts are that the equalizer compensating circuit 180 among Fig. 1 is to operate in the frequency domain, equalizer compensating circuit 270 among Fig. 2 then operates in the time domain, because those skilled in the art should be able to understand framework and the operating principle thereof of single carrier/multi-carrier share receiver shown in Figure 2 200 easily after reading above explanation about single carrier/multi-carrier share receiver 100 shown in Figure 1, so further instruction is just no longer given unnecessary details in this omission.
In addition.In the present invention, adjust equalizer coefficients with aforesaid algorithm and also only be the usefulness of explanation.For instance, in other embodiments of the invention, the coefficient W ' of the second frequency-domain equalizer 180 (f) and the coefficient w ' of time-domain equalizer 240 (t) also can adopt other compute mode except least mean square algorithm.For instance, can adopt recursive least-squares (Recursive Least Square, LMS) or any other algorithm to be implemented, and these design variation also belong to category of the present invention.
In the present invention, also can be adjusted according to design requirement or system mode in the equalizer compensating circuit (that is equalizer compensating circuit 180 or 270), for example, obtaining after the desirable cutting behind the frequency signal d (t), optionally stopping the running of coefficient adjusting circuit (that is coefficient adjusting circuit 170 or 260) and keep the coefficient of equalizer (that is the second frequency-domain equalizer 130 or time-domain equalizer 240); Or, can set according to design requirement the size of block (block), adjust the time interval of the coefficient of computation balance device (that is the second frequency-domain equalizer 130 or time-domain equalizer 240).
That is to say, using the circuit framework among Fig. 1 and Fig. 2 is not one of restrictive condition of the present invention, and the Fig. 1 shown in aforementioned and Fig. 2 are block schematic diagram with as illustrative purposes, do not represent single carrier/multi-carrier share receiver 100,200 practical structures, anyly all belong to category of the present invention without prejudice to the present invention's spirit and the single carrier/multi-carrier share receiver framework that can reach effect same.
See also Fig. 3, Fig. 3 is that the present invention is applied to single carrier/multi-carrier share receiver receives the color noise of signal to eliminate single carrier method flow diagram.Note that if can reach identical result in fact, the step order that might not need to abide by flow process shown in Figure 3 is sequentially carried out.This flow process includes following steps:
Step 302: the single carrier reception signal y (t) that receives according to single carrier/multi-carrier share receiver carries out discrete Fourier transform (DFT) to produce frequency-region signal Y (f).
Step 304: carry out the first equilibrium treatment to produce the first balanced rear frequency domain signal X (f) according to frequency-region signal Y (f).
Step 306: frequency domain signal X (f) is carried out anti-Discrete Fourier transform operation to produce the first balanced rear time-domain signal (for example in Fig. 1 after balanced according to first, the first balanced rear frequency domain signal X (f) produces the second balanced rear frequency domain signal X after compensating via the second frequency-domain equalizer 130 ' (f), then via producing the first balanced rear frequency signal x ' after anti-discrete Fourier transform unit 240 computings (t).The shared receiver 200 of lifting Fig. 2 is example, and then the first balanced rear frequency domain signal X (f) is directly via frequency signal x (t) after the first equilibrium of generation after anti-discrete Fourier transform unit 230 computings).
Step 408: (t) carry out the cutting running to produce the rear time-domain signal d (t) of cutting according to the first balanced rear time-domain signal x '.For instance, single carrier/pair carrier wave is shared receiver 100, the rear time-domain signal X (f) of the first equilibrium produces the rear time-domain signal x ' of the first equilibrium (t) after processing via the second frequency-domain equalizer 130, anti-discrete Fourier transform unit 140, cutter 150 can (t) carry out computing by time-domain signal x ' after balanced to first produce the rear time-domain signal d (f) of cutting.Single carrier/pair carrier wave is shared receiver 200, the first balanced rear frequency domain signal X (f) is after processing via anti-discrete Fourier transform unit 230 and time-domain equalizer 240, produce the first balanced rear time-domain signal x ' (t), cutter 250 (t) carries out producing the rear time-domain signal d (t) of cutting after the computing via time-domain signal x ' after balanced to first.
Step 410: compensate the first balanced rear frequency domain signal X (f) according to time-domain signal d (t) after cutting at least.For instance, single carrier/pair carrier wave is shared receiver 100, and time-domain signal d (t) and the first balanced rear time-domain signal X (f) adjust the coefficient W ' of the second frequency-domain equalizer 130 (f) to reach the purpose of compensation the first balanced rear frequency domain signal X (f) after the 180 foundation cuttings of equalizer compensating circuit; For single carrier/pair carrier wave is shared receiver 200, time-domain signal d (t) and the first balanced rear time-domain signal x (t) adjust the coefficient w ' of time-domain equalizer 240 (t) to reach the purpose of compensation the first balanced rear frequency domain signal X (f) (corresponding to the first balanced rear time-domain signal x (t)) after the 270 foundation cuttings of equalizer compensating circuit.
Note that, in the flow process of Fig. 3, the second equilibrium treatment is that adaptive-filtering is processed (adaptivefiltering process), and the method for adjusting the coefficient of this second equilibrium treatment can be by carrying out lowest mean square (Least Mean Square, LMS) computing, recursive least-squares (Recursive Least Square, LMS) computing or other algorithm come to the second equilibrium treatment coefficient (that is the coefficient W ' of the second frequency-domain equalizer 130 (f) or the coefficient w ' of time-domain equalizer 240 (t)) adjust.
Eliminate the detailed description that single carrier receives noise (such as the color noise) among the signal y (t) and in aforementioned exposure it be described owing to share receiver 100,200 via single carrier/pair carrier wave, so just the detailed description of the flow process of relevant Fig. 3 repeat no more in this omission.
In summary, any single carrier/multi-carrier share receiver with and correlation technique (can support simultaneously the single carrier/multi-carrier share receiver of single carrier mode and two carrier modes) if according to the present invention disclosed technology and use a compensation framework (equalizer compensating circuit 180,270) to come compensating via the first frequency-domain equalizer 120,220 outputs that produced, just the problem that can effectively solve color noise in the receiving end signal is to promote the signal quality of single-carrier signal in the single carrier/multi-carrier share receiver 100,200.In addition, any employing equalizer compensation operation (no matter at frequency domain or among the time domain) with the method for the characteristic that compensates the first frequency-domain equalizer (that is the equilibrium that the first frequency-domain equalizer was produced output) with and related framework all belong to category of the present invention and fall among the protection category of the present invention.
The above only is embodiments of the invention, and all equalizations of doing according to claim scope of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (22)
1. single carrier/multi-carrier share receiver includes:
The first discrete Fourier transform unit is carried out discrete Fourier transform (DFT) to produce frequency-region signal in order to the reception signal that receives according to this single carrier/multi-carrier share receiver;
The first frequency-domain equalizer is coupled to this first discrete Fourier transform unit, in order to carry out equilibrium treatment according to this frequency-region signal to produce the first balanced rear frequency-region signal;
The equalizer compensating circuit is in order to compensate this first balanced rear frequency-region signal to produce the second balanced rear frequency-region signal;
Anti-discrete Fourier transform unit is coupled to this equalizer compensating circuit, in order to carry out anti-Discrete Fourier transform operation to produce balanced rear time-domain signal according to this second balanced rear frequency-region signal; And
Cutter is coupled to this anti-discrete Fourier transform unit, cuts rear time-domain signal in order to carry out the cutting running according to time-domain signal after this equilibrium to produce,
Wherein this equalizer compensating circuit compensates this first balanced rear frequency-region signal to produce this second balanced rear frequency-region signal according to time-domain signal after this cutting.
2. single carrier/multi-carrier share receiver according to claim 1, wherein this equalizer compensating circuit includes:
The second frequency-domain equalizer is coupled between this first frequency-domain equalizer and this anti-discrete Fourier transform unit, in order to carry out equilibrium treatment to produce the second balanced rear frequency-region signal according to this first balanced rear frequency-region signal;
The second discrete Fourier transform unit is coupled to this second frequency-domain equalizer and this cutter, in order to carry out anti-discrete Fourier transform (DFT) according to time-domain signal after this cutting to produce the rear frequency-region signal of cutting; And
Coefficient adjusting circuit is coupled to this second frequency-domain equalizer, in order to adjust the coefficient of this second frequency-domain equalizer according to frequency-region signal after this first balanced rear frequency-region signal and this cutting.
3. single carrier/multi-carrier share receiver according to claim 2, wherein this second frequency-domain equalizer is sef-adapting filter.
4. single carrier/multi-carrier share receiver according to claim 2, wherein this coefficient adjusting circuit according at least this first balanced after frequency-region signal and the computing of the rear frequency-region signal execution of this cutting lowest mean square to adjust the coefficient of this second frequency-domain equalizer.
5. single carrier/multi-carrier share receiver according to claim 2, wherein this coefficient adjusting circuit according at least this first balanced after frequency-region signal and the computing of the rear frequency-region signal execution of this cutting recursive least-squares to adjust the coefficient of this second frequency-domain equalizer.
6. single carrier/multi-carrier share receiver according to claim 1, wherein this reception signal is single-carrier signal.
7. the method for the reception signal that receives of a processing single-carrier/multi-carrier share receiver includes:
Carry out discrete Fourier transform (DFT) to produce frequency-region signal according to this reception signal;
Carry out the first equilibrium treatment to produce the first balanced rear frequency-region signal according to this frequency-region signal;
Compensate this first balanced rear frequency-region signal to produce the second balanced rear frequency-region signal;
Carry out anti-Discrete Fourier transform operation to produce balanced rear time-domain signal according to this second balanced rear frequency-region signal; And
Carry out the cutting running to produce the rear time-domain signal of cutting according to time-domain signal after this equilibrium;
Wherein compensate this first balanced after frequency-region signal with produce second balanced after the step of frequency-region signal comprise according to time-domain signal after this cutting and compensate this first balanced rear frequency-region signal.
8. method according to claim 7, wherein:
The step that compensates this first balanced rear frequency-region signal includes:
Carry out the second equilibrium treatment to produce the second balanced rear frequency-region signal according to this first balanced rear frequency-region signal;
Carry out anti-discrete Fourier transform (DFT) to produce the rear frequency-region signal of cutting according to frequency signal after this cutting; And
Adjust the coefficient of this second equilibrium treatment according to frequency-region signal after this first balanced rear frequency-region signal and this cutting.
9. method according to claim 8, wherein this second equilibrium treatment is that adaptive-filtering is processed.
10. method according to claim 8, the step of wherein adjusting the coefficient of this second equilibrium treatment includes:
According at least this first balanced after frequency-region signal and the computing of the rear frequency-region signal execution of this cutting lowest mean square to adjust the coefficient of this second equilibrium treatment.
11. method according to claim 8, the step of wherein adjusting the coefficient of this second equilibrium treatment includes:
According at least this first balanced after frequency-region signal and the computing of the rear frequency-region signal execution of this cutting recursive least-squares to adjust the coefficient of this second equilibrium treatment.
12. method according to claim 7, wherein this reception signal is single-carrier signal.
13. a single carrier/multi-carrier share receiver includes:
The first discrete Fourier transform unit is carried out discrete Fourier transform (DFT) to produce frequency-region signal in order to the reception signal that receives according to this single carrier/multi-carrier share receiver;
The first frequency-domain equalizer is coupled to this first discrete Fourier transform unit, in order to carry out equilibrium treatment according to this frequency-region signal to produce balanced rear frequency-region signal;
Anti-discrete Fourier transform unit is coupled to this first frequency-domain equalizer, in order to carry out anti-Discrete Fourier transform operation according to frequency-region signal after this equilibrium to produce the first balanced rear time-domain signal;
The equalizer compensating circuit is coupled to this anti-discrete Fourier transform unit, is used for compensating this first balanced rear time-domain signal to produce the second balanced rear time-domain signal; And
Cutter is coupled to this anti-discrete Fourier transform unit, in order to carry out the cutting running to produce the rear time-domain signal of cutting according to this second balanced rear time-domain signal;
Wherein this equalizer compensating circuit compensates this first balanced rear time-domain signal to produce this second balanced rear time-domain signal according to time-domain signal after this cutting.
14. single carrier/multi-carrier share receiver as claimed in claim 13, wherein this equalizer compensating circuit includes:
Time-domain equalizer is coupled between this cutter and this anti-discrete Fourier transform unit, in order to carry out equilibrium treatment to produce the second balanced rear time-domain signal according to this first balanced rear time-domain signal; And
Coefficient adjusting circuit is coupled to this time-domain equalizer, in order to adjust the coefficient of this time-domain equalizer according to time-domain signal after this first balanced rear time-domain signal and this cutting.
15. single carrier/multi-carrier share receiver as claimed in claim 14, wherein this time-domain equalizer is the adaptive filter.
16. single carrier/multi-carrier share receiver as claimed in claim 14, wherein this coefficient adjusting circuit is carried out the lowest mean square computing to adjust the coefficient of this time-domain equalizer according to time-domain signal after this first balanced rear time-domain signal and this cutting at least.
17. the described single carrier/multi-carrier share receiver of claim 14, wherein this coefficient adjusting circuit is carried out the recursive least-squares computing to adjust the coefficient of this time-domain equalizer according to time-domain signal after this first balanced rear time-domain signal and this cutting at least.
18. the method for the reception signal that a processing single-carrier/multi-carrier share receiver receives includes:
Carry out discrete Fourier transform (DFT) to produce frequency-region signal according to this reception signal;
Carry out the first equilibrium treatment to produce balanced rear frequency-region signal according to this frequency-region signal;
Carry out anti-Discrete Fourier transform operation to produce the first balanced rear time-domain signal according to frequency-region signal after this equilibrium;
Compensate this first balanced rear time-domain signal to produce the second balanced rear time-domain signal; And
Carry out the cutting running to produce the rear time-domain signal of cutting according to this second balanced rear time-domain signal;
Wherein compensate this first balanced after time-domain signal with produce second balanced after the step of time-domain signal include according to time-domain signal after this cutting compensate this first balanced after time-domain signal to produce this second balanced rear time-domain signal.
19. method as claimed in claim 18, wherein:
The step that compensates this first balanced rear frequency-region signal includes:
Carry out the second equilibrium treatment to produce the second balanced rear time-domain signal according to this first balanced rear time-domain signal; And
Adjust the coefficient of this second equilibrium treatment according to time-domain signal after this first balanced rear time-domain signal and this cutting.
20. method as claimed in claim 19, wherein this second equilibrium treatment is that adaptive filtering is processed.
21. method as claimed in claim 19, the step of wherein adjusting the coefficient of this second equilibrium treatment includes:
According at least this first balanced after time-domain signal and the computing of the rear time-domain signal execution of this cutting lowest mean square to adjust the coefficient of this second equilibrium treatment.
22. the described method of claim 19, the step of wherein adjusting the coefficient of this second equilibrium treatment includes:
According at least this first balanced after time-domain signal and the computing of the rear time-domain signal execution of this cutting recursive least-squares to adjust the coefficient of this second equilibrium treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910006696 CN101808059B (en) | 2009-02-13 | 2009-02-13 | Single carrier/multi-carrier share receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910006696 CN101808059B (en) | 2009-02-13 | 2009-02-13 | Single carrier/multi-carrier share receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101808059A CN101808059A (en) | 2010-08-18 |
| CN101808059B true CN101808059B (en) | 2013-04-24 |
Family
ID=42609680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910006696 Active CN101808059B (en) | 2009-02-13 | 2009-02-13 | Single carrier/multi-carrier share receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101808059B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5712559B2 (en) * | 2010-10-27 | 2015-05-07 | ソニー株式会社 | Signal processing apparatus, signal processing method, and program |
| CN113824659B (en) * | 2020-06-18 | 2024-03-26 | 瑞昱半导体股份有限公司 | Signal processing circuit and method in digital domain |
| CN114301528B (en) * | 2021-12-03 | 2023-08-18 | 中山大学 | Method and system for inhibiting balanced enhanced phase noise in optical fiber communication |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7023938B1 (en) * | 1999-04-08 | 2006-04-04 | Nec Usa, Inc. | Receiver for discrete multitone modulated signals having window function |
-
2009
- 2009-02-13 CN CN 200910006696 patent/CN101808059B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7023938B1 (en) * | 1999-04-08 | 2006-04-04 | Nec Usa, Inc. | Receiver for discrete multitone modulated signals having window function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101808059A (en) | 2010-08-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10615880B2 (en) | Reduced complexity constrained frequency-domain block LMS adaptive equalization for coherent optical receivers | |
| US9071334B2 (en) | Far-end crosstalk canceling method and device | |
| TWI416955B (en) | Single-carrier/multi-carrier community receiver and method for processing signal received by signle-carrier/multi-carrier community receiver | |
| US8135058B2 (en) | Adaptive known signal canceller | |
| CN100539568C (en) | Multicarrier data receive method, multi-carrier modulation device and multicarrier modulation system | |
| EP2501089B1 (en) | Frequency-domain adaptive feedback equalizer | |
| WO2004010603A2 (en) | Frequency domain equalization of communication signals | |
| US20090059781A1 (en) | Method and apparatus for ici cancellation in communication systems | |
| US9036734B1 (en) | Methods and apparatus for performing digital predistortion using time domain and frequency domain alignment | |
| CN101808059B (en) | Single carrier/multi-carrier share receiver | |
| CN103534958A (en) | Receiving device and receiving method | |
| US6047025A (en) | Method and apparatus for equallization in an asymmetric digital aubscriber line communications system | |
| CN103181092B (en) | Dsl alien noise reduction method, DSL line card equipment and vectorial DSL system | |
| CN101471694B (en) | Device and method for eliminating interference | |
| US20060198453A1 (en) | Impluse supression apparatus applied in ofdm system and related method thereof | |
| CN101808058B (en) | Single carrier/multi-carrier share receiver and signal processing method thereof | |
| CN100508512C (en) | Pulse noise suppression apparatus and method in orthogonal frequency-division multiplexing system | |
| US7274736B2 (en) | Multiple path equalization for multicarrier systems | |
| CN102111375B (en) | Method and device for eliminating co-channel interference in quadrature amplitude modulation signals | |
| US9071333B2 (en) | Device for canceling crosstalk, signal processing system and method for canceling crosstalk | |
| EP1618713B1 (en) | Reduced complexity time-frequency trained equalizer for discrete multi-tone based dsl systems | |
| US20030151469A1 (en) | Method for determining the filter coefficients of a digital time domain equalizer for a multicarrier frequency signal | |
| US7933196B2 (en) | Method and apparatus for canceling channel interference | |
| CN102347921B (en) | Receiver and carry out the method for equilibrium treatment to received signal | |
| TWI575901B (en) | Device and method for eliminating channel effect |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |