CN110417429A - Signal receiving device and its signal processing method - Google Patents

Signal receiving device and its signal processing method Download PDF

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Publication number
CN110417429A
CN110417429A CN201810391435.1A CN201810391435A CN110417429A CN 110417429 A CN110417429 A CN 110417429A CN 201810391435 A CN201810391435 A CN 201810391435A CN 110417429 A CN110417429 A CN 110417429A
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circuit
comparison result
amount
threshold value
variability
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洪嘉骏
卓庭楠
郑凯文
童泰来
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MStar Semiconductor Inc Taiwan
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MStar Semiconductor Inc Taiwan
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Priority to CN201810391435.1A priority Critical patent/CN110417429A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/20—Monitoring; Testing of receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03891—Spatial equalizers

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Noise Elimination (AREA)

Abstract

The present invention provides a kind of signal receiving device, wherein including a weakened phase restoring circuit, a phase estimation circuitry, a phase noise circuit for detecting and a bandwidth initialization circuit.The weakened phase restoring circuit is to impose a weakened phase restoring program to an input signal according to a band width setting.The phase estimation circuitry is to generate the phase estimation value for being relevant to the input signal.The phase noise circuit for detecting is to determine a amount of phase noise according to the phase estimation value.The bandwidth initialization circuit is the average value and an amount of variability to calculate the amount of phase noise, and the band width setting in the weakened phase restoring circuit is adjusted according to the average value and the variability.

Description

Signal receiving device and its signal processing method
Technical field
The present invention is related to communication system, and especially determines feedback equalizer (time- with the time domain in communication system Domain decision-feedback equalizer) it is related.
Background technique
With the progress of the communication technology, digital television broadcasting is increasingly popularized.In addition to cable run and mobile communication base station, number Word TV signal also can pass through artificial satellite and send.DTV satellite broadcasting (digital video broadcasting- Satellite, DVB-S) specification is one of standard most widely employed in the current field.Fig. 1 is presented a DTV and defends The local function block diagram of the receiving end of star broadcast, wherein being returned comprising a down-conversion circuit 110, an oscillator 120, a phase Return road (phase recovery loop) 130, one phase estimation circuitry 140, a phase noise circuit for detecting 150, Yi Jiyi Bandwidth initialization circuit 160.Roughly speaking, oscillator 120 is responsible for generating a reference frequency signal SR, for down-conversion circuit 110 By radiofrequency signal yRFFrequency reducing is converted to fundamental frequency signal y；It is responsible for finding out the phase error in fundamental frequency signal y in weakened phase restoring circuit 130 And be compensated, and the task of phase estimation circuitry 140, phase noise circuit for detecting 150 and bandwidth initialization circuit 160 is for phase It replys circuit 130 and sets bandwidth appropriate in position.The lesser weakened phase restoring circuit 130 of bandwidth can more subtly track phase error, But it is relatively inaccessible to loop lock state.Relatively, the biggish weakened phase restoring circuit 130 of bandwidth is easier to lock, but can not track Fine phase error.How the grade circuits further explained below carry out weakened phase restoring and loop bandwidth is set.
It is detectd in weakened phase restoring circuit 130 comprising a phase compensating circuit 131, a data distribution circuit 132, a phase error Survey device 133, loop filter 134 and a Numerical Control oscillator (numerically-controlled oscillator,NCO)135.It includes some data with specific content that many transmission ends, which can enable its output signal, for receiving End is as the reference value in its signal handler.For DTV satellite broadcasting specification, had staggeredly in fundamental frequency signal y The multistage given data and multistage unknown data of appearance.As shown in Figure 1, phase compensating circuit 131 is vibrated according to Numerical Control The phase compensation signal S that device 135 providesCPhase compensation is carried out to fundamental frequency signal y, to generate signal z after a compensation.It is corresponding Ground, signal z has given data and unknown data after multistage compensation after the multistage compensation staggeredly occurred after compensation.Data distribution electricity Road 132 is by unknown data after each section of compensation after compensation in signal z (with symbol z in Fig. 1UIndicate) it captures and, it is supplied to Phase error detector 133.Phase error detector 133 is responsible for unknown data z after calculating compensationUIn the phases of each data miss Poor estimated value φ, and loop filter 134 is transferred to calculate its average valueThen, Numerical Control oscillator 135 can be according to circuit The average value that filter 134 generatesAdjustment phase place thermal compensation signal SC.As shown in Figure 1, bandwidth initialization circuit 160 is usually to penetrate The impedance magnitude of the element in loop filter 134 is adjusted to change the bandwidth in weakened phase restoring circuit 130.
On the other hand, given data is (in Fig. 1 after data distribution circuit 132 can capture the compensation after compensation in signal z With symbol zKIndicate), it is supplied to phase estimation circuitry 140.Phase estimation circuitry 140 is responsible for according to given data after each section of compensation Calculate separately a phase estimation value θE, and phase noise circuit for detecting 150 can be according to the equiphase estimated values thetaEIt calculates corresponding Multiple the amount of phase noise PN.In current art, bandwidth initialization circuit 160 is according to the absolute of above-mentioned multiple the amount of phase noise PN Value size determines the band width setting BW in weakened phase restoring circuit 130.For example, when the absolute value of the amount of phase noise PN is higher than one Weakened phase restoring circuit 130 will be set as having a biggish bandwidth, subtracted whereby by predetermined threshold level, bandwidth initialization circuit 160 It is not easy the problem of locking less；When the absolute value of the amount of phase noise PN is lower than the predetermined threshold level, bandwidth initialization circuit 160 will be incited somebody to action Weakened phase restoring circuit 130 is set as having a lesser bandwidth.
The problem of above-mentioned bandwidth initialization circuit mechanism, is that it is relatively suitable for radiofrequency signal yRFCommunication environments be additivity The case where white Gauss noise (additive white Gaussian noise, AWGN) channel.If radiofrequency signal yRFPropagation Environment be not simple additivity white Gaussian Noise channel or receiving end antenna polarization direction be set with deviation (that is, It is different from the practical polarization direction of signal), the distribution aspect (pattern) of the amount of phase noise PN can be complicated many.In this feelings Under condition, the absolute value of the amount of phase noise PN is not sufficient enough to reflect the characteristic of the amount of phase noise PN, only in accordance with the amount of phase noise The absolute value of PN is that mistake possible occur come the bandwidth for determining weakened phase restoring circuit 130.
Summary of the invention
To solve the above problems, the present invention proposes a kind of new signal receiving device and its signal processing method.
An embodiment according to the present invention is a kind of signal receiving device, wherein including a weakened phase restoring circuit, a phase Estimating circuit, a phase noise circuit for detecting and a bandwidth initialization circuit.The weakened phase restoring circuit is to according to a bandwidth Setting imposes a weakened phase restoring program to an input signal.The phase estimation circuitry is to be relevant to the input signal to generate One phase estimation value.The phase noise circuit for detecting is to determine a amount of phase noise according to the phase estimation value.The bandwidth Initialization circuit is the average value and an amount of variability to calculate the amount of phase noise, and according to the average value and the variability tune The band width setting in the whole weakened phase restoring circuit.
It is according to another embodiment of the present invention a kind of signal processing method.Firstly, being relevant to a phase of an input signal Position estimated value is generated.One the amount of phase noise is determined according to the phase estimation value.Then, an average value of the amount of phase noise It is computed with an amount of variability.According to the average value and the variability, it is applied to a weakened phase restoring program of the input signal Band width setting be adjusted.
It can be further understood by following detailed description of the invention and institute's accompanying drawings about the advantages and spirit of the present invention.
Detailed description of the invention
The local function block diagram of the receiving end of a DTV satellite broadcasting is presented in Fig. 1.
Fig. 2 is the functional block diagram according to the signal receiving device in one embodiment of the invention.
A kind of specific embodiment of Fig. 3 presentation mean value calculation circuit and amount of variability counting circuit.
Several specific embodiments of initialization circuit according to the present invention are presented in Fig. 4 A~Fig. 4 D.
Fig. 5 is the flow chart according to the signal processing method in one embodiment of the invention.
It should be noted that schema of the invention includes that the functional block diagram of a variety of functional modules associated with each other is presented. The schemas such as this are not thin portion circuit diagram, and connecting line therein is only to indicate signal stream.Between functional element and/or program A variety of interactive relationship are not necessarily intended to reach through the direct electrical connection beginning.In addition, the function of individual component be not necessarily intended to as The mode being painted in schema is distributed, and distributed block is not necessarily intended to the realization of electronic component in a distributed manner.
Symbol description
110: down-conversion circuit 120: oscillator
130: weakened phase restoring circuit 131: phase compensating circuit
132: data distribution circuit 133: phase error detector
134: loop filter 135: Numerical Control oscillator
140: phase estimation circuitry 150: phase noise circuit for detecting
160: bandwidth initialization circuit 200: signal receiving device
210: weakened phase restoring circuit 220: phase estimation circuitry
230: phase noise circuit for detecting 240: bandwidth initialization circuit
241: the 241A: the first summation circuit of mean value calculation circuit
241B: multiplier 242: amount of variability counting circuit
242A: the first the 242B: the second summation circuit of squaring circuit
242C: the 242D: the second squaring circuit of multiplier
242E: adder 243: initialization circuit
243A: circuit for detecting 243B: threshold value initialization circuit
243C: the first the 243D: the second comparison circuit of comparison circuit
243E: control circuit 243E1: or logic gate
243E2: accumulator circuit 243E3: third comparison circuit
243E4: with logic gate 243F: selection circuit
243G: the 243H: the four comparison circuit of counting circuit
yRF: radiofrequency signal y: fundamental frequency signal
SR: reference frequency signal SC: phase compensation signal
Z: signal z after compensationU: unknown data after compensation
zK: given data φ after compensation: phase error estimation and phase error value
: average value θE: phase estimation value
PN: the amount of phase noise BW, BW1~BWM: band width setting
S1、S2: input signal AVG: average value
VAR: amount of variability Q: channel quality indicator
A: the first the b: the second threshold value of threshold value
D: the four the C1: the first comparison result of threshold value
C2: the second comparison result C3: third comparison result
C4: the four comparison result Ctrl: control signal
Cnt: accumulated result TH: predetermined threshold level
R: ratio S501~S504: process step
Specific embodiment
An embodiment according to the present invention is a kind of signal receiving device, and functional block diagram is depicted in Fig. 2.Signal connects Receiving apparatus 200 includes a weakened phase restoring circuit 210, a phase estimation circuitry 220, a phase noise circuit for detecting 230, Yi Jiyi Bandwidth initialization circuit 240.Specifically, the circuit design of bandwidth initialization circuit 240 is different from bandwidth initialization circuit 160.Practice On, signal receiving device 200 can be implemented in the various bandwidth for needing to set weakened phase restoring circuit according to the amount of phase noise Signal processing system in, such as, but not limited to Fig. 1 present DTV satellite radio receiver end.
Roughly speaking, weakened phase restoring circuit 210 be to according to one band width setting BW to an input signal S1Impose phase Program is replied, and phase estimation circuitry 220 is to be relevant to input signal S to generate1A phase estimation value θE.In Fig. 1 For DTV satellite radio receiver end, that impose weakened phase restoring program by weakened phase restoring circuit 210 is fundamental frequency signal y, and Phase estimation circuitry 220 generates phase estimation value θ accordinglyEInput signal S2Correspond to datum after the compensation of fundamental frequency signal y According to zK.Phase noise circuit for detecting 230 is responsible for according to phase estimation value θEIt determines the amount of phase noise PN, is supplied to band width setting Circuit 240, as foundation of the generation with width setting BW.The amount of phase noise PN that phase noise circuit for detecting 230 generates can be One absolute value is also possible to the relative value for pointing out phase noise size.
The implementation details in weakened phase restoring circuit 210, phase estimation circuitry 220 and phase noise circuit for detecting 230 are this Have known to usually intellectual in technical field that the present invention belongs to, is not repeated in this.Bandwidth initialization circuit 240 is mainly introduced below Function and embodiment.
Transmission bandwidth, operating frequency and the signal noise ratio of system and the intensity of phase noise are usually as the time becomes Change.For these reasons, when bandwidth initialization circuit 240 of the invention carries out Bandwidth adjustment, by the change degree of the amount of phase noise It accounts for.As shown in Fig. 2, bandwidth initialization circuit 240 includes a mean value calculation circuit 241, an amount of variability counting circuit 242 With an initialization circuit 243.Mean value calculation circuit 241 is responsible for calculating the average value AVG of the amount of phase noise PN, and amount of variability calculates Circuit 242 is responsible for calculating amount of variability (variance) VAR of the amount of phase noise PN.Fig. 3 is presented mean value calculation circuit 241 and becomes A kind of specific embodiment of different amount counting circuit 242.First summation circuit 241A is responsible for persistently adding up in one section of predetermined period The amount of phase noise PN, and multiplier 241B is responsible for the number N by the accumulation result divided by the amount of phase noise PN to have added up at present, Average value AVG is generated whereby.First squaring circuit 242A is responsible for calculating the square value of each the amount of phase noise PN；Second is cumulative Circuit 242B is responsible for the grade square values that add up；Multiplier 242C is responsible for the accumulation result divided by the phase noise to have added up at present Measure the number N of PN；Second squaring circuit 242D is responsible for calculating the square value of average value AVG；Adder 242E is responsible for involution musical instruments used in a Buddhist or Taoist mass The output signal of 242C subtracts the output signal of the second squaring circuit 242D, generates amount of variability VAR whereby.It should be noted that this The scope of invention is not limited with the calculation that Fig. 3 is presented.For example, mean value calculation circuit 241 is readily modified as calculating one Weighted moving average (weighted moving average) generates average value AVG.Similarly, amount of variability counting circuit 242 The mobile variation (weighted moving variance) of a weighting can be calculated to generate average value VAR.
Different from only considering that the prior art of the absolute value of the amount of phase noise PN, initialization circuit 243 are determining band width setting When BW, average value AVG and amount of variability VAR are accounted for.A kind of specific embodiment of initialization circuit 243 is presented in Fig. 4 A, In include a circuit for detecting 243A, a threshold value initialization circuit 243B, one first comparison circuit 243C, one second comparison circuit 243D, a control circuit 243E and a selection circuit 243F.Circuit for detecting 243A is responsible for 200 institute of detection signal reception device Locate a channel quality indicator Q of communication environment, such as, but not limited to signal noise ratio.Threshold value initialization circuit 243B is responsible for basis Channel quality indicator Q determines the one first threshold value a for corresponding to average value AVG, and one second corresponding to amount of variability VAR Threshold value b.In practice, a look-up table can be set in threshold value initialization circuit 243B, store multiple groups previously according to actual amount The channel quality indicator Q and threshold value a/b that survey or simulation calculating generate.The frequency detected with signal noise ratio circuit for detecting 243A Channel quality index Q can find out corresponding threshold value a/b as index value, threshold value initialization circuit 243B.First comparison is electric Road 243C compares the first threshold value a and average value AVG, to generate one first comparison result C1, and the second comparison circuit 243D ratio Compared with the second threshold value b and amount of variability VAR, to generate one second comparison result C2.As shown in Figure 4 A, control circuit 243E is basis Comparison result C1, C2 generate control a signal Ctrl, control selections circuit 243F from M band width setting (BW1~BWM, M be greater than One integer) in selection one, as the band width setting BW for being supplied to weakened phase restoring circuit 210.
A kind of specific embodiment of control circuit 243E is further presented in case where numerical value M is two in Fig. 4 B.At this In a embodiment, there are two types of band width setting BW by selection circuit 243F1、BW2It may be selected, and assume compared to first band width setting BW1, the second band width setting BW2Enable weakened phase restoring circuit 210 that there is biggish bandwidth.Control circuit 243E includes one or logic gate (OR gate) 243E1, an accumulator circuit 243E2 and a third comparison circuit 243E3.Assuming that when average value AVG is higher than the When one threshold value a, the first comparison result C1 is set to binary one, otherwise is set to Binary Zero；When amount of variability VAR is higher than Second threshold value b, the second comparison result C2 is set to binary system one, otherwise is set to binary zero.It is based on or logic gate The characteristic of 243E1, as long as the first comparison result C1 is 1, no matter the second comparison result C2 is 0 or 1, and selection circuit 243F can be defeated Second band width setting BW out2.If the first comparison result C1 is 0, the second comparison result C2 will influence the choosing of selection circuit 243F It selects, details are as follows.
Whenever the second comparison result C2 shows that amount of variability VAR is higher than the second threshold value b, it is tired that accumulator circuit 243E2 improves it It counts result cnt (such as the numerical value of accumulated result cnt is added one).Whenever the second comparison result C2 show amount of variability VAR not higher than Second threshold value b, accumulator circuit 243E2 are then to reduce accumulated result cnt (such as to subtract one for the numerical value of accumulated result cnt or return Zero).Whether third comparison circuit 243E3 can be higher than one third of predetermined threshold level TH generation according to accumulated result cnt and compare knot Fruit C3.Assuming that third comparison result C3 is set to binary one, otherwise quilt when accumulated result cnt is higher than predetermined threshold level TH It is set as Binary Zero.Based on or logic gate 243E1 characteristic, when the first comparison result C1 is 0 and third comparison result C3 is 1, Selection circuit 243F can select the second band width setting BW2.Relatively, when the first comparison result C1 and third comparison result C3 are all 0, then selection circuit 243F can select first band width setting BW1.For example but not limited to this, and accumulated result cnt's is initial Value can be zero, and predetermined threshold level TH can be five.
From the above, compared to first band width setting BW1, the second band width setting BW2Enable weakened phase restoring circuit 210 have compared with Big bandwidth.In the above-described embodiments, only when average value AVG is less than or equal to the first threshold value a and amount of variability VAR continues When a period of time is less than or equal to the second threshold value b, weakened phase restoring circuit 210 can just be set to use lesser bandwidth.In In many cases, when the average value AVG of the amount of phase noise PN is bigger, amount of variability VAR can be higher.However, if signal receiving device The 200 antenna polarization directions for being not at simple additivity white Gauss noise (AWGN) channel or receiving end are set with Deviation, may also occur that average value AVG is low but the situation of amount of variability VAR high in practice.If the average value of the amount of phase noise PN AVG is low but amount of variability VAR high, and enabling weakened phase restoring circuit 210 have big bandwidth is preferably to select.The reason is that phase is made an uproar Volume is stronger, usually makes its amount of variability bigger, and big bandwidth can tolerate biggish phase noise.By by average value AVG It is all accounted for amount of variability VAR, the initialization circuit 243 that Fig. 4 B is presented can be made more preferably to be judged than prior art.
Another specific embodiment of Fig. 4 C presentation initialization circuit 243.In this embodiment, initialization circuit 243 into one Step includes a counting circuit 243G, is responsible for calculating a numerical value r relevant to amount of variability VAR, and the second comparison circuit 243D is to use To compare the second threshold value b and numerical value r.For example but not limited to this, and numerical value r can be variability VAR divided by average The resulting ratio of value AVG.As it was earlier mentioned, average value AVG and amount of variability VAR usually have considerable degree of positive correlation.Using Ratio r rather than amount of variability VAR itself are compared with the second threshold value b, being a kind of to standardize amount of variability VAR (standardize) concept.It should be noted that when replacing amount of variability VAR itself with ratio r come compared with the second threshold value b, Second threshold value b caused by threshold value initialization circuit 243B can be different from the second threshold value b in Fig. 4 B.
Another specific embodiment of Fig. 4 D presentation initialization circuit 243.In this embodiment, initialization circuit 243 into one Step includes one the 4th comparison circuit 243H, and control circuit 243E further includes one and logic gate (AND gate) 243E4.The Four comparison circuit 243H are (equally can be by threshold value initialization circuit 243B root to compare average value AVG and one the 4th threshold value d Selected according to channel quality indicator Q), to generate one the 4th comparison result C4.4th threshold value d is lower than aforementioned first threshold value a. Assuming that the 4th comparison result C4 is set to binary one, otherwise is set to two when average value AVG is higher than the 4th threshold value d System 0.Based on the characteristic with logic gate 243E4, as long as the 4th comparison result C4 is 0, no matter or logic gate 243E1 output letter It number is 0 or 1, selection circuit 243F can export first band width setting BW1.That is, in this embodiment, as long as average As low as a degree, (that is, lower than the 4th threshold value d), no matter amount of variability VAR is big or small, weakened phase restoring circuit 210 to value AVG It will be set to use lesser bandwidth.
In practice, the bandwidth initialization circuit 240 in above several embodiments can be realized using various control and processing platform, Include fixed and programmable logic circuit, such as programmable logic gate array, the integrated electricity for specific application Road, microcontroller, microprocessor, digital signal processor.In addition, bandwidth initialization circuit 240 is also designed to through execution Stored processor instruction completes its task in one memory (not being painted).
It is according to another embodiment of the present invention a kind of signal processing method applied to a signal receiving device, process Figure is depicted in Fig. 5.Firstly, step S501 is to generate the phase estimation value for being relevant to an input signal.Step S502 is root A amount of phase noise is determined according to the phase estimation value.Step S503 is an average value and the variation for calculating the amount of phase noise Amount.Step S504 is then the band that a weakened phase restoring program of the input signal is applied to according to the average value and variability adjustment Width setting.Persond having ordinary knowledge in the technical field of the present invention when introducing signal receiving device 200 it is understood that previously retouched The various operation changes stated can also be applied to the signal processing method in Fig. 5, and details repeats no more.
By the detailed description of embodiments above, it is intended to more clearly describe feature and spirit of the invention, and simultaneously It is non-that scope of the invention is limited with above-mentioned disclosed specific embodiment.On the contrary, the purpose is to wish to cover Various changes and tool equality are arranged in the scope of the scope of the patents to be applied of the invention.

Claims (16)

1. a kind of signal receiving device, includes:
One weakened phase restoring circuit, to impose a weakened phase restoring program to an input signal according to a band width setting；
One phase estimation circuitry, to generate the phase estimation value for being relevant to the input signal；
One phase noise circuit for detecting, to determine a amount of phase noise according to the phase estimation value；And
One bandwidth initialization circuit, to calculate the average value and an amount of variability of the amount of phase noise, and according to the average value with The variability adjusts the band width setting in the weakened phase restoring circuit.
2. signal receiving device as described in claim 1, which is characterized in that the bandwidth initialization circuit includes:
One circuit for detecting, to detect a channel quality of communication environment locating for the signal receiving device to obtain a channel quality Index；
One threshold value initialization circuit, to determine one first threshold value and one second threshold value according to the channel quality indicator；
One first comparison circuit, to compare the average value and first threshold value, to generate one first comparison result；
One second comparison circuit, to compare the amount of variability or a numerical value relevant to the amount of variability and second threshold value, To generate one second comparison result；
One control circuit, to generate a control signal according to first comparison result and second comparison result；And
One selection circuit is supplied to the phase to select a band width setting from multiple band width settings according to the control signal Reply circuit in position.
3. signal receiving device as claimed in claim 2, which is characterized in that the channel quality indicator is a signal noise ratio.
4. signal receiving device as claimed in claim 2, which is characterized in that the numerical value relevant to the amount of variability is by the change The opposite sex is divided by the resulting ratio of the average value.
5. signal receiving device as claimed in claim 2, which is characterized in that the control circuit includes:
One accumulator circuit is somebody's turn to do whenever second comparison result shows that the amount of variability or the numerical value relevant to the amount of variability are higher than Second threshold value, the accumulator circuit improve an accumulated result, whenever second comparison result show the amount of variability or with the change For the relevant numerical value of different amount not higher than second threshold value, which reduces the accumulated result；
One third comparison circuit, to generate a third comparison result according to whether the accumulated result is higher than a predetermined threshold level； And
One first decision logic circuit, to generate the control signal according to first comparison result and the third comparison result.
6. signal receiving device as claimed in claim 5, which is characterized in that multiple band width setting includes a big band width setting With a small band width setting；Only when first comparison result shows the average value lower than first threshold value, and the third compares For the accumulated result not higher than the predetermined threshold level, which is to select this small as the result is shown Band width setting.
7. signal receiving device as claimed in claim 2, which is characterized in that the threshold value initialization circuit is further according to the frequency Channel quality index determines one the 4th threshold value for being lower than first threshold value, and the bandwidth initialization circuit further includes:
One the 4th comparison circuit, to generate one the 4th comparison result according to whether the average value is higher than the 4th threshold value；
Wherein the control circuit includes:
One second decision logic circuit, to according to first comparison result, second comparison result and the 4th comparison result Generate the control signal.
8. signal receiving device as claimed in claim 7, which is characterized in that multiple band width setting includes a big band width setting With a small band width setting；When the 4th comparison result shows the average value less than or equal to the 4th threshold value, second judgement Logic circuit enables the control signal to select the small band width setting.
9. a kind of signal processing method applied to a signal receiving device, includes:
A generates the phase estimation value for being relevant to an input signal；
B determines a amount of phase noise according to the phase estimation value；
C calculates an average value and an amount of variability for the amount of phase noise；And
D is applied to the band width setting of a weakened phase restoring program of the input signal according to the average value and variability adjustment.
10. signal processing method as claimed in claim 9, which is characterized in that step D includes:
(d1) channel quality of communication environment locating for the signal receiving device is detected to obtain a channel quality indicator；
(d2) one first threshold value and one second threshold value are determined according to the channel quality indicator；
(d3) compare first threshold value and the average value, to generate one first comparison result；
(d4) compare second threshold value and the amount of variability or a numerical value relevant with the amount of variability, compared with generating one second As a result；
(d5) a control signal is generated according to first comparison result and second comparison result；And
(d6) a band width setting is selected from multiple band width settings according to the control signal, being supplied to the weakened phase restoring program makes With.
11. signal processing method as claimed in claim 10, which is characterized in that the channel quality indicator is a signal noise Than.
12. signal processing method as claimed in claim 10, which is characterized in that the numerical value relevant to the amount of variability is should Variability is divided by the resulting ratio of the average value.
13. signal processing method as claimed in claim 10, which is characterized in that step (d5) includes:
Whenever second comparison result shows that the amount of variability or the numerical value relevant to the amount of variability are higher than second threshold value, Improve an accumulated result；
Whenever second comparison result shows the amount of variability or the numerical value relevant to the amount of variability not higher than second threshold Value, reduces the accumulated result；
A third comparison result is generated according to whether the accumulated result is higher than a predetermined threshold level；And
The control signal is generated according to first comparison result and the third comparison result.
14. signal processing method as claimed in claim 13, which is characterized in that multiple band width setting includes that a big bandwidth is set A fixed and small band width setting；Generating the control signal with the third comparison result according to first comparison result includes:
Only when first comparison result shows the average value lower than first threshold value, and the third comparison result shows that this is tired Result is counted not higher than the predetermined threshold level, enables the control signal to select the small band width setting.
15. signal processing method as claimed in claim 10, which is characterized in that step D is further included:
One the 4th threshold value for being lower than first threshold value is determined according to the channel quality indicator；And
One the 4th comparison result is generated according to whether the average value is higher than the 4th threshold value；
And step (d5) includes:
The control signal is generated according to first comparison result, second comparison result and the 4th comparison result.
16. signal processing method as claimed in claim 15, which is characterized in that multiple band width setting includes that a big bandwidth is set A fixed and small band width setting；The control is generated according to first comparison result, second comparison result and the 4th comparison result Signal includes:
When the 4th comparison result shows that the average value less than or equal to the 4th threshold value, enables the control signal to select this small Band width setting.
CN201810391435.1A 2018-04-27 2018-04-27 Signal receiving device and its signal processing method Pending CN110417429A (en)

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Citations (4)

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CN1677876A (en) * 2004-03-31 2005-10-05 清华大学 Method for removing phase noise for time domain synchronous or thogonal frequency-division multiplex receiver and system and thereof
US20060285618A1 (en) * 2005-06-21 2006-12-21 Ehud Shoor Adaptive phase recovery
CN102598615A (en) * 2009-11-05 2012-07-18 日本电气株式会社 Carrier wave reproduction circuit and demodulation circuit of semi-synchronous detection system
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