CN101808059A - Single carrier/multi-carrier share receiver - Google Patents
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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, especially refer to a kind of single carrier/multi-carrier share receiver that can support multi-carrier mode and single carrier mode simultaneously with and the coherent signal processing method, it shares the color noise (color noise) of the single-carrier signal of receiver by using compensation circuit (as the equalizer compensating circuit) dynamically to suppress single carrier/pair carrier wave, advances to promote single carrier/pair carrier wave and shares the communication quality of 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 single carrier (single carrier) pattern and multicarrier (multi carrier) pattern again; And digital TV ground multimedia broadcasting (it allows single carrier mode and multi-carrier mode while and the standard of depositing for a kind of for Digital Terrestrial Multimedia Broadcasting, a DTMB) cover specification of working out for the People's Republic of China (PRC).
By aforementioned standard, can make single-carrier signal be able to multi-carrier signal share identical hardware (as single carrier/multi-carrier share receiver) satisfy in response to and gives birth to, overlap the circuit cost that hardware structure is saved receiver by only using one.
Yet, under single carrier mode,, therefore badly influence in the shared receiver quality of signals during single carrier mode because single carrier/pair carrier wave is shared receiver and the noise among filtering its single carrier received signal y (t) smoothly.
Summary of the invention
Therefore, one of purpose of the present invention promptly solves the problem of aforementioned known techniques and proposes a kind of single carrier/multi-carrier share receiver, makes the received signal of handling via single carrier/multi-carrier share receiver avoid suffering the color noise jamming and have 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: first discrete Fourier transform unit, first frequency-domain equalizer, anti-discrete Fourier transform unit, cutter and equalizer compensating circuit.This first discrete Fourier transform unit is in order to carry out discrete Fourier transform (DFT) to produce frequency-region signal according to this received signal that this single carrier/multi-carrier share receiver received; 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 back 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 (DFT) computing to produce the first balanced back time-domain signal according to this first balanced back frequency-region signal; This cutter is coupled to this anti-discrete Fourier transform unit, in order to carry out the cutting running to produce cutting back time-domain signal according to this first balanced back time-domain signal; And this equalizer compensating circuit in order to according at least should cutting back time-domain signal compensate this first equilibrium frequency-region signal afterwards.
According to another embodiment of the present invention, the method for its received signal that also discloses a kind of processing single-carrier/multi-carrier share receiver and received.This method includes following steps: carry out discrete Fourier transform (DFT) to produce frequency-region signal according to this received signal; Carry out first equilibrium treatment to produce the first balanced back frequency-region signal according to this frequency-region signal; Carry out anti-discrete Fourier transform (DFT) computing to produce the first balanced back time-domain signal according to this first balanced back frequency-region signal; Carry out the cutting running to produce cutting back time-domain signal according to this first balanced back time-domain signal; And according at least should cutting back time-domain signal compensate this first equilibrium frequency-region signal afterwards.
Description of drawings
Fig. 1 is the block schematic diagram of 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 applied in single carrier/multi-carrier share receiver method flow diagram with the color noise of eliminating the single carrier received signal for the present invention.
[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 " speech is to comprise any indirect means that are electrically connected that directly reach at this.Therefore, be coupled to second device, then represent this first device can directly be electrically connected in this second device, or be electrically connected to this second device indirectly by other device or connection means if describe first device in the literary composition.
Fig. 1 is the block schematic diagram of 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, 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, 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 second frequency-domain equalizer 130.
In the present embodiment, being provided with of equalizer compensating circuit 180 mainly is in frequency domain the first balanced back signal X (f) via 120 outputs of first frequency-domain equalizer to be done compensation, to eliminate the first balanced back signal X (signal noise in (f) (comprising above-mentioned color noise) by the computing of related algorithm, the feasible time-domain signal that is produced via cutter 150 at last, that is cutting back frequency signal d (t), 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 it mainly carries out signal processing in time domain, 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 (discrete Fourier transform (DFT) computing as the aforementioned) 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, the first balanced back frequency domain signal X (f) that will produce after will handling via first frequency-domain equalizer 120 is transferred to another second frequency-domain equalizer 130 that can dynamically adjust coefficient and is compensated, to compensate the undesirable characteristic of first frequency-domain equalizer 120 by algorithm.
Specifically, in this first embodiment, can be by behind first frequency-domain equalizer 120, coupling second frequency-domain equalizer 130, and calculate the coefficient (can be expressed as W ' (f)) of second frequency-domain equalizer 130 via feedback framework (as: feedback mechanism that is constituted by second frequency-domain equalizer 130, anti-discrete Fourier transform unit 140, cutter 150, second discrete Fourier transform unit 160 and coefficient adjusting circuit 170)).Thus, (that is cutting back time-domain signal (d (t)) can level off to the transmission signal z (t) that the transmission end transmits can to make the signal of single carrier/multi-carrier share receiver 100 output.
In other words, via using equalizer compensating circuit 180 (as second frequency-domain equalizer 130, the coefficient adjusting circuit 170 and second discrete Fourier transform unit 160) running, make the single carrier/multi-carrier share receiver 100 that to support single carrier mode and multi-carrier mode not only 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 first frequency-domain equalizer 120 is W (f), the single carrier received signal is y (t), then carry out the discrete Fourier transform (DFT) computing and obtain frequency-region signal Y (f) via first discrete Fourier transform unit 110, via coefficient is that first frequency-domain equalizer 120 of W (f) carries out producing the first balanced back frequency domain signal X (f) after the equilibrium treatment, and it can mathematical expression (1) expression:
X(f)＝W(f)*Y(f)
(1)
Owing to only use first frequency-domain equalizer 120 can't eliminate color noise in the single carrier received signal fully, the present invention comes the first balanced frequency domain signal X (f) is afterwards compensated to use another equalizer (for example second frequency-domain equalizer 130) by algorithm.In simple terms, the coefficient of supposing second frequency-domain equalizer 130 be W ' (f), then the first balanced back frequency domain signal X (f) being carried out another equilibrium treatment via second frequency-domain equalizer 130 and produce the second balanced back frequency domain signal X ' (f), this second balanced back frequency domain signal X ' (f) can mathematical expression (2) expression:
X′(f)＝W′(f)*X(f) (2)
The second balanced back frequency domain signal X ' (f) more produce time-domain signal via anti-discrete Fourier transform unit 140, can be expressed as the balanced back of first among Fig. 1 time-domain signal x ' (t).The cutter 150 then foundation first balanced back time-domain signal x ' (t) is carried out the cutting computing to produce cutting back time-domain signal (that is d of Fig. 1 (t)).
In this first embodiment, first frequency-domain equalizer 120 and 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 first frequency-domain equalizer 120 can adopt least mean-square error (Minimum Mean Squared Error, mode MMSE) is tried to achieve.For example, the time-domain signal of transmission end is expressed as z (t), the fundamental frequency signal of receiving terminal (as single carrier received signal y (t)) can be considered one with time domain channel response h (t) and the relevant function of 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 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 obtain the coefficient W (f) of first frequency-domain equalizer 120 by mathematical expression (5):
Wherein: H
*(f) be the conjugate complex number of frequency domain channel response H (f), K is a 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 received 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 computing exactly of the energy of N (f) in frequency domain, so in the present invention, adopt the mode of equalizer compensating circuit (as equalizer compensating circuit 180), further guarantee under single carrier mode the signal (consistency of the transmission signal z (t) that transmit cutting back time-domain signal (d (t)) and transmission end of single carrier/multi-carrier share receiver 100 outputs the first equilibrium back frequency domain signal X (f) is done further compensation operation by the mode that adopts mathematical operation.
Please continue to consult Fig. 1, in the present embodiment, the coefficient W ' of 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, then the coefficient W ' that can obtain second frequency-domain equalizer 130 by mathematical expression (7) is (f):
E[X(f)*(D(f)-W′(f)*X(f))] (8)
In the another embodiment of the present invention, suppose 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 one time second frequency-domain equalizer 130 in each block (block) is (f), then this moment 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: cutting back frequency-region signal D (f) is cutting back frequency d (t) signal frequency-domain expression, and it is to carry out anti-discrete Fourier transform (DFT) and produce via second discrete Fourier transform unit 160.Via the computing and the related hardware framework of aforementioned exposure, the coefficient W ' that can converge to one group of second frequency-domain equalizer 130 (f) makes (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 bigger, dynamically adjusted corresponding W ' (f), (that is to say: when N (f) is excessive by separating mathematical expression (7) (f)) with the W ' that obtains having smaller value.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 preferable 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 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 back signal X (f) via 220 outputs of 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, in order to according to being come frequency domain signal X (f) after first equilibrium of handling via first frequency-domain equalizer 220 is done compensation by the output signal (the first balanced back time-domain signal x (t)) of frequency signal d (t) and anti-discrete Fourier transform unit 230 after the cutting of cutter 250 output.
In Fig. 2, first frequency-domain equalizer 220 and time-domain equalizer 240 are sef-adapting filter, and the coefficient W (f) of first frequency-domain equalizer is will be to obtain according to frequency domain channel response H (f).Time-domain equalizer 240 is adjusted the coefficient (can be expressed as w ' (t)) of circuit 260 with dynamic adjustment time-domain equalizer via single carrier/multi-carrier share receiver 200 control coefrficients.
Since the framework of single carrier/multi-carrier share receiver 200 shown in Figure 2 with and operating principle be same as single carrier/multi-carrier share receiver shown in Figure 1 100 haply, 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 the 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, use aforesaid algorithm to adjust equalizer coefficients and also only be the usefulness of explanation.For instance, in other embodiments of the invention, the coefficient W ' of 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 implemented, and these design variation also belong to category of the present invention.
In the present invention, also can be adjusted in the equalizer compensating circuit (that is equalizer compensating circuit 180 or 270) according to design requirement or system mode, 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 second frequency-domain equalizer 130 or time-domain equalizer 240); Or, can set the size of block (block) according to design requirement, adjust the time interval of the coefficient that calculates equalizer (that is 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 the practical structures of single carrier/multi-carrier share receiver 100,200, anyly all belong to category of the present invention without prejudice to the present invention spirit and the single carrier/multi-carrier share receiver framework that can reach effect same.
See also Fig. 3, Fig. 3 is applied to the method flow diagram of single carrier/multi-carrier share receiver with the color noise of elimination single carrier received signal for the present invention.Note that if can reach identical result in fact, the sequence of steps that might not need to abide by flow process shown in Figure 3 is carried out in regular turn.This flow process includes following steps:
Step 302: carry out discrete Fourier transform (DFT) to produce frequency-region signal Y (f) according to the single carrier received signal y (t) that single carrier/multi-carrier share receiver received.
Step 304: carry out first equilibrium treatment to produce the first balanced back frequency domain signal X (f) according to frequency-region signal Y (f).
Step 306: carry out anti-discrete Fourier transform (DFT) computing to produce the first balanced back time-domain signal (for example in Fig. 1 according to the first balanced back frequency domain signal X (f), the first balanced back frequency domain signal X (f) produces the second balanced back frequency domain signal X after compensating via second frequency-domain equalizer 130 ' (f), then via producing the first equilibrium back frequency signal x ' after anti-discrete Fourier transform unit 240 computings (t).The shared receiver 200 of lifting Fig. 2 is an example, and then the first balanced back frequency domain signal X (f) is directly via producing the first balanced back frequency signal x (t) after anti-discrete Fourier transform unit 230 computings).
Step 408: (t) carry out the cutting running to produce cutting back time-domain signal d (t) according to the first balanced back time-domain signal x '.For instance, single carrier/pair carrier wave is shared receiver 100, the first balanced back time-domain signal X (f) produces the first balanced back time-domain signal x ' (t) after handling via 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 cutting back time-domain signal d (f).Single carrier/pair carrier wave is shared receiver 200, the first balanced back frequency domain signal X (f) is after handling via anti-discrete Fourier transform unit 230 and time-domain equalizer 240, produce the first balanced back time-domain signal x ' (t), cutter 250 is via the first balanced back time-domain signal x ' (t) is carried out producing cutting back time-domain signal d (t) after the computing.
Step 410: compensate the first balanced back frequency domain signal X (f) according to cutting back time-domain signal d (t) at least.For instance, single carrier/pair carrier wave is shared receiver 100, and equalizer compensating circuit 180 is adjusted the coefficient W ' of second frequency-domain equalizer 130 (f) to reach the purpose of the compensation first balanced back frequency domain signal X (f) according to the cutting back time-domain signal d (t) and the first balanced back time-domain signal X (f); For single carrier/pair carrier wave is shared receiver 200, equalizer compensating circuit 270 is adjusted the coefficient w ' of time-domain equalizer 240 (t) to reach the purpose of the compensation first balanced back frequency domain signal X (f) (corresponding to the first balanced back time-domain signal x (t)) according to the cutting back time-domain signal d (t) and the first balanced back time-domain signal x (t).
Note that, in the flow process of Fig. 3, second equilibrium treatment is that adaptive-filtering is handled (adaptive filtering 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 second equilibrium treatment coefficient (that is the coefficient W ' of second frequency-domain equalizer 130 (f) or the coefficient w ' of time-domain equalizer 240 (t)) adjust.
Eliminate the detailed description of noise (as the color noise) among the single carrier received 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 the single carrier/multi-carrier share receiver of single carrier mode and two carrier modes simultaneously) if according to the present invention disclosed technology and use a compensation framework (equalizer compensating circuit 180,270) to come to compensating via 120,220 outputs that produced of first frequency-domain equalizer, the problem that just can solve color noise in the receiving end signal effectively is to promote the signal quality of single-carrier signal in 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 first frequency-domain equalizer (that is the equilibrium that 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 being done according to claim scope of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (20)
1. single carrier/multi-carrier share receiver includes:
First discrete Fourier transform unit is in order to carry out discrete Fourier transform (DFT) to produce frequency-region signal according to the received signal that this single carrier/multi-carrier share receiver received;
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 back 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 (DFT) computing to produce the first balanced back time-domain signal according to this first balanced back frequency-region signal;
Cutter is coupled to this anti-discrete Fourier transform unit, in order to carry out the cutting running to produce cutting back time-domain signal according to this first balanced back time-domain signal; And
The equalizer compensating circuit, in order to according at least should cutting back time-domain signal compensate this first equilibrium frequency-region signal afterwards.
2. single carrier/multi-carrier share receiver according to claim 1, wherein this equalizer compensating circuit includes:
Second frequency-domain equalizer, be coupled between this first frequency-domain equalizer and this anti-discrete Fourier transform unit, in order to carry out equilibrium treatment according to this first balanced back frequency-region signal to produce the second balanced back frequency-region signal, wherein this anti-discrete Fourier transform unit produces this first balanced back time-domain signal according to this second balanced back frequency-region signal;
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) to produce cutting back frequency-region signal according to this cutting back time-domain signal; 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 this first balanced back frequency-region signal and this cutting back frequency-region signal.
3. single carrier/multi-carrier share receiver according to claim 2, wherein this second frequency-domain equalizer is a sef-adapting filter.
4. single carrier/multi-carrier share receiver according to claim 2, wherein this coefficient adjusting circuit is according to this first balanced back frequency-region signal and this cutting back frequency-region signal are carried out the lowest mean square computing to adjust the coefficient of this second frequency-domain equalizer at least.
5. single carrier/multi-carrier share receiver according to claim 2, wherein this coefficient adjusting circuit is according to this first balanced back frequency-region signal and this cutting back frequency-region signal are carried out the recursive least-squares computing to adjust the coefficient of this second frequency-domain equalizer at least.
6. single carrier/multi-carrier share receiver according to claim 1, wherein this equalizer compensating circuit includes:
Time-domain equalizer, be coupled between this cutter and this anti-discrete Fourier transform unit, in order to carry out equilibrium treatment according to this first balanced back time-domain signal to produce the second balanced back time-domain signal, wherein this cutter produces this cutting back time-domain signal according to this second balanced back 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 this first balanced back time-domain signal and this cutting back time-domain signal.
7. single carrier/multi-carrier share receiver according to claim 6, wherein this time-domain equalizer is a sef-adapting filter.
8. single carrier/multi-carrier share receiver according to claim 6, wherein this coefficient adjusting circuit is carried out the lowest mean square computing to adjust the coefficient of this time-domain equalizer according to this first balanced back time-domain signal and this cutting back time-domain signal at least.
9. single carrier/multi-carrier share receiver according to claim 6, wherein this coefficient adjusting circuit is carried out the recursive least-squares computing to adjust the coefficient of this time-domain equalizer according to this first balanced back time-domain signal and this cutting back time-domain signal at least.
10. single carrier/multi-carrier share receiver according to claim 1, wherein this received signal is a single-carrier signal.
11. the method for the received signal that processing single-carrier/multi-carrier share receiver received includes:
Carry out discrete Fourier transform (DFT) to produce frequency-region signal according to this received signal;
Carry out first equilibrium treatment to produce the first balanced back frequency-region signal according to this frequency-region signal;
Carry out anti-discrete Fourier transform (DFT) computing to produce the first balanced back time-domain signal according to this first balanced back frequency-region signal;
Carry out the cutting running to produce cutting back time-domain signal according to this first balanced back time-domain signal; And
Foundation this cutting back time-domain signal at least compensates this first balanced back frequency-region signal.
12. method according to claim 11, wherein:
The step that compensates this first balanced back frequency-region signal includes:
Carry out second equilibrium treatment to produce the second balanced back frequency-region signal according to this first balanced back frequency-region signal;
Carry out anti-discrete Fourier transform (DFT) to produce cutting back frequency-region signal according to this cutting back frequency signal; And
Adjust the coefficient of this second equilibrium treatment according to this first balanced back frequency-region signal and this cutting back frequency-region signal; And
The step that produces this first balanced back time-domain signal includes:
Carry out anti-discrete Fourier transform (DFT) computing to produce this first balanced back time-domain signal according to this second balanced back frequency-region signal.
13. method according to claim 12, wherein this second equilibrium treatment is that adaptive-filtering is handled.
14. method according to claim 12, the step of wherein adjusting the coefficient of this second equilibrium treatment includes:
According to this first balanced back frequency-region signal and this cutting back frequency-region signal are carried out the lowest mean square computing to adjust the coefficient of this second equilibrium treatment at least.
15. method according to claim 12, the step of wherein adjusting the coefficient of this second equilibrium treatment includes:
According to this first balanced back frequency-region signal and this cutting back frequency-region signal are carried out the recursive least-squares computing to adjust the coefficient of this second equilibrium treatment at least.
16. method according to claim 11, wherein:
The step that compensates this first balanced back frequency-region signal includes:
Carry out second equilibrium treatment to produce the second balanced back time-domain signal according to this first balanced back time-domain signal; And
Adjust the coefficient of this second equilibrium treatment according to this first balanced back time-domain signal and this cutting back time-domain signal; And
The step that produces this cutting back frequency-region signal includes:
Produce this cutting back time-domain signal according to this second balanced back time-domain signal.
17. method according to claim 16, wherein this second equilibrium treatment is that adaptive-filtering is handled.
18. method according to claim 16, the step of wherein adjusting the coefficient of this second equilibrium treatment includes:
According to this first balanced back time-domain signal and this cutting back time-domain signal are carried out the lowest mean square computing to adjust the coefficient of this second equilibrium treatment at least.
19. method according to claim 16, the step of wherein adjusting the coefficient of this second equilibrium treatment includes:
According to this first balanced back time-domain signal and this cutting back time-domain signal are carried out the recursive least-squares computing to adjust the coefficient of this second equilibrium treatment at least.
20. method according to claim 11, wherein this received signal is a single-carrier signal.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102457468A (en) * | 2010-10-27 | 2012-05-16 | 索尼公司 | Signal processing apparatus, signal processing method and program |
| CN113824659A (en) * | 2020-06-18 | 2021-12-21 | 瑞昱半导体股份有限公司 | Signal processing circuit and method in digital domain |
| CN114301528A (en) * | 2021-12-03 | 2022-04-08 | 中山大学 | Method and system for suppressing balanced enhanced phase noise in optical fiber communication |
Family Cites Families (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 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102457468A (en) * | 2010-10-27 | 2012-05-16 | 索尼公司 | Signal processing apparatus, signal processing method and program |
| CN113824659A (en) * | 2020-06-18 | 2021-12-21 | 瑞昱半导体股份有限公司 | Signal processing circuit and method in digital domain |
| 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 |
| CN114301528A (en) * | 2021-12-03 | 2022-04-08 | 中山大学 | Method and system for suppressing balanced enhanced phase noise in optical fiber communication |
| 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 |
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| CN101808059B (en) | 2013-04-24 |
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