CN106998305A - Handle the device and method of channel estimating - Google Patents
Handle the device and method of channel estimating Download PDFInfo
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- CN106998305A CN106998305A CN201610044414.3A CN201610044414A CN106998305A CN 106998305 A CN106998305 A CN 106998305A CN 201610044414 A CN201610044414 A CN 201610044414A CN 106998305 A CN106998305 A CN 106998305A
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- 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
- H04L25/0202—Channel estimation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2626—Arrangements specific to the transmitter only
- H04L27/2627—Modulators
- H04L27/2628—Inverse Fourier transform modulators, e.g. inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators
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- Computer Networks & Wireless Communication (AREA)
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Abstract
A kind of communicator, includes a detecting unit, in a time interval, performing mobility detecting, to produce a detecting result；One selecting unit, is coupled to the detecting unit, for according to the detecting result, a channel estimating and measuring method is selected from multiple channel estimating and measuring methods；And a channel estimation unit, the selecting unit is coupled to, for according to the channel estimating and measuring method, to performing a channel estimating for the channel that receives a signal.
Description
Technical field
The present invention is relevant to a kind of device and method for communication system, espespecially it is a kind of handle channel estimating device and
Method.
Background technology
Before communication system comes into operation, i.e., transmission end will start to transmit a signal to before receiving terminal, and receiving terminal is usual
Channel estimating can be carried out, to estimate the channel between transmission end and receiving terminal, and then reduced according to the result of estimation (for example etc.
Change) signal.However, according to transmission end and/or the difference of receiving terminal local environment, the channel between two ends can produce different changes
Change, the degree of change is also quite different.In general, particular channel estimating and measuring method is difficult to the channel suitable for all kinds.Cause
This, receiving terminal is to accurate estimated channel, and it is particularly important for how selecting appropriate channel estimating and measuring method to carry out estimated channel
Problem.
The content of the invention
Therefore, the invention provides a kind of device and method for handling channel estimating, for the degree according to channel variation
To handle channel estimating, to solve the above problems.
The invention discloses a kind of communicator, include a detecting unit, moved in a time interval, performing one
Property detecting, to produce a detecting result；One selecting unit, is coupled to the detecting unit, for according to the detecting result, from multiple
A channel estimating and measuring method is selected in channel estimating and measuring method；And a channel estimation unit, the selecting unit is coupled to, for basis
The channel estimating and measuring method, to for receive a signal a channel perform a channel estimating.
The present invention separately discloses a kind of method of processing channel estimating, includes using a detecting unit come in the time
In interval, mobility detecting is performed, to produce a detecting result；According to the detecting result, using a selecting unit from multiple
A channel estimating and measuring method is selected in channel estimating and measuring method；And according to the channel estimating and measuring method, use a channel estimation unit pair
For receiving a channel one channel estimating of execution of a signal.
Brief description of the drawings
Fig. 1 is the schematic diagram of the communication system of the embodiment of the present invention one.
Fig. 2 is the schematic diagram of the communicator of the embodiment of the present invention one.
Fig. 3 is the flow chart of the flow of the embodiment of the present invention one.
Fig. 4 is the flow chart of the flow of the embodiment of the present invention one.
Fig. 5 is the schematic diagram of the detecting unit of the embodiment of the present invention one.
Fig. 6 is the schematic diagram of the another detecting unit of the embodiment of the present invention.
Fig. 7 is the schematic diagram of the another detecting unit of the embodiment of the present invention.
Fig. 8 is the flow chart of the mobility detecting flow process of the embodiment of the present invention one.
Symbol description
20 communicators
202 detecting units
204 selecting units
206 channel estimation units
30th, 40,80 flow
300th, 302,304,306,308,400, step
402、404、406、408、410、412、
414、416、810、820、830、840
510 estimated channels respond generation module
511 channel estimators
512 pseudo noise correlators
520 converting units
530 computing units
540 judge modules
541 comparing units
542 counting units
543 determining meanss
BBS fundamental frequency signals
CV calculated values
Det_rst detecting results
Est_mthd channel estimating and measuring methods
Fh estimated channel frequency responses
H estimated channels are responded
TX transmission ends
RX receiving terminals
Embodiment
Fig. 1 is refer to, it is the schematic diagram of the communication system 10 of the embodiment of the present invention one.Communication system 10 can pass to be any
The communication system of single carrier (single carrier) signal or multicarrier (multi-carrier) signal is sent and/or receives, letter
Slightly it is made up of a transmission end TX and a receiving terminal RX.Multi-carrier signal can be OFDM (orthogonal
Frequency-division multiplexing, OFDM) signal (or discrete multitone modulation (discrete multi-tone
Modulation, DMT) signal), but not limited to this.In Fig. 1, transmission end TX and receiving terminal RX is for illustrating communication system
10 framework.For example, communication system 10 can be Asymmetric Digital Subscriber Line (asymmetric digital
Subscriber line, ADSL) system, power communication (power line communication, PLC) system, coaxial cable
The wired communication system such as Ethernet (Ethernet over coax, EOC).Or, communication system 10 can be wireless for region
Network (wireless local area network, WLAN), DVB (Digital Video
Broadcasting, DVB) system and advanced Long Term Evolution (Long Term Evolution-advanced, LTE-A) system etc.
Wireless communication system, wherein digital video broadcast system can include T-DMB (Digital
Terrestrial Multimedia Broadcast, DTMB), Terrestrial Digital Video Broadcasting System (DVB-Terrestrial,
DVB-T), new edition Terrestrial Digital Video Broadcasting System (DVB-T2/C2) and integrated services digital broadcast system (Integrated
Services Digital Broadcasting, ISDB).In addition, transmission end TX and receiving terminal RX may be disposed at mobile phone,
In the devices such as notebook computer, tablet PC, e-book and portable computer system, not limited to this.
Fig. 2 is refer to, it is the schematic diagram of the communicator 20 of the embodiment of the present invention one, in Fig. 1 receiving terminal RX, using
To handle channel estimating.Communicator 20 includes a detecting unit 202, a selecting unit 204 and a channel estimation unit
206.Specifically, detecting unit 202 is in a time interval, performing mobility detecting, to produce a detecting knot
Fruit det_rst.Selecting unit 204 is coupled to detecting unit 202, is for according to detecting result det_rst, estimating from multiple channels
A channel estimating and measuring method est_mthd is selected in survey method.Channel estimation unit 206, is coupled to selecting unit 204, is for root
According to channel estimating and measuring method est_mthd, to performing a channel estimating for the channel that receives a signal.That is, communication dress
Putting 20 first can carry out mobility detecting to judge the degree (the speed, amplitude such as change) of channel variation, and produce correspondence
Detecting result, then select an appropriate channel estimating and measuring method according to this.For another angle, mobility detecting can be considered
Judge the running of the translational speed of communicator 20 (or another communicator being in communication with).In simple terms, communication dress
Channel estimating and measuring method can be selected according to the degree of channel variation by putting 20.
In one embodiment, multiple channel estimating and measuring methods can include least square (least square, LS) method and most
Small square (least mean square, LMS) method.For example, when it is dynamic channel that detecting result, which indicates channel, selection
Least squares method may be selected in unit 204, and when it is static channel that detecting result, which indicates channel, selecting unit 204 may be selected
Least fibre method.Further, when the intensity of variation of channel in time interval is more than a pre-determined value, channel is indicated as
Dynamic channel, and when the intensity of variation of the channel in time interval is less than pre-determined value, channel is indicated as static letter
Road；In one embodiment, time interval can include multiple frames.That is, detecting unit 202 can spend multiple frames to judge
The degree of channel variation, its details is repeated after holding.
The function mode of aforementioned communication device 20, can be summarized as a flow 30, in receiving terminal RX, as shown in Figure 3.Stream
Journey 30 is comprised the steps of：
Step 300：Start.
Step 302：In a time interval, mobility detecting is performed, to produce corresponding to a channel variation degree
One numerical value.
Step 304：Judge whether the numerical value is more than a pre-determined value.If so, performing step 306；If it is not, performing step
308。
Step 306：According to a least squares method, to performing a channel estimating for the channel that receives a signal.
Step 308：According to a least fibre method, to performing the channel estimating for the channel that receives the signal.
Flow 30 is the function mode for illustrating communicator 20, describe in detail and change refer to it is foregoing, in
This is not repeated.
In addition, selecting unit 204 can be according to detecting result and (to be received) signal, from multiple channel estimating and measuring methods
In select channel estimating and measuring method.That is, when selecting channel estimating and measuring method, the type of signal can also be put into consideration, its
The type of middle signal can include single-carrier signal and multi-carrier signal.In one embodiment, when signal includes single carrier letter
Number and detecting result when to indicate channel be dynamic channel, channel estimating and measuring method is least squares method, and when signal includes list
When carrier signal and detecting result indicate channel for static channel, channel estimating and measuring method is a least fibre method.That is, right
In single-carrier signal, different channel estimating and measuring methods can be selected according to different channels.In one embodiment, when signal is included
When having multi-carrier signal and detecting result instruction channel for dynamic channel, channel estimating and measuring method is the minimum with first group of parameter
Equal method, and the signal includes multi-carrier signal and detecting result is when to indicate channel be static channel, channel estimating and measuring method
For the least fibre method with second group of parameter.Wherein, a Memorability of first parameter is less than the note of second parameter
The property recalled.That is, compared to second group parameter, when using first group of parameter, the weight of older channel estimating result compared with
The weight of low and newer channel estimating result is higher.
The function mode of aforementioned communication device 20, can be summarized as a flow 40, in receiving terminal RX, as shown in Figure 3.Stream
Journey 40 is comprised the steps of：
Step 400：Start.
Step 402：In a time interval, mobility detecting is performed, to produce corresponding to a channel variation degree
One numerical value.
Step 404：Judge whether the numerical value is more than a pre-determined value.If so, performing step 406；If it is not, performing step
412。
Step 406：Whether judge a signal to be received is a single-carrier signal or a multi-carrier signal.If this is singly carried
Ripple signal, performs step 408；If the multi-carrier signal, step 410 is performed.
Step 408：According to a least squares method, to performing a channel estimating for the channel that receives a signal.
Step 410：According to the least fibre method with one first parameter, to being performed for the channel that receives the signal
The channel estimating.
Step 412：Whether judge a signal to be received is the single-carrier signal or the multi-carrier signal.If this is singly carried
Ripple signal, performs step 414；If the multi-carrier signal, step 416 is performed.
Step 414：According to the least fibre method, to performing the channel estimating for the channel that receives the signal.
Step 416：According to the least fibre method with one second parameter, to being performed for the channel that receives the signal
The channel estimating.
Flow 40 is the function mode for illustrating communicator 20, describe in detail and change refer to it is foregoing, in
This is not repeated.
It is noted that communicator 20 (and detecting unit therein 202, selecting unit 204 and channel estimation unit
206) implementation can have many kinds.For example, it can be considered according to design or system requirements, by detecting unit 202, selection
Unit 204 and channel estimation unit 206 are integrated into one or more units.In addition, communicator 20 can be with hardware, software, firmware
(it is hardware unit and the combination of computer instruction and data, and computer instruction belongs to read-only soft on hardware unit with data
Part), the combination of electronic system or said apparatus realize, not limited to this.
Referring to Fig. 5, it is the schematic diagram of the first embodiment of the detecting unit 202 shown in Fig. 1.The detecting of the present embodiment
Unit 202 is included：One estimated channel response generation module 510, a converting unit 520, a computing unit 530 and a judge module
540, wherein wantonly two or whole foregoing circuits can be incorporated into an integrated circuit or be individual circuit.The detecting unit of the present embodiment
202 fundamental frequency signals (BBS is denoted as in figure) received include an at least carrier wave；The fundamental frequency signal can be in a radio communication
The signal of one OFDM of system, it, which is included, has orthogonality between multiple subcarriers, and multiple subcarriers.Please join again
Fig. 5 is read, the estimated channel response generation module 510 receives a fundamental frequency signal, to obtain the letter of its wireless channel passed through
Road characteristic, estimated channel responds generation module 510 and estimates fundamental frequency signal in the channel at multiple time points according to the fundamental frequency signal
Response, to produce multiple estimated channel responses (h is denoted as in figure).In one embodiment, estimated channel response generation module 510
Include a channel estimator of symbolization formula channel estimating (Pilot-Symbol-Aided Estimation) technology.One
In embodiment, estimated channel response generation module 510 includes a pseudo noise correlator, for calculating base according to the fundamental frequency signal
The association results (Correlation Result) of frequency signal and a pseudo noise sequence (Pseudo-Noise Sequences), its
Described in the signal frame head (Frame Header) of a signal frame of fundamental frequency signal a pseudo noise sequence can be included.Then, estimate
Multiple estimated channels response input that channel response generation module 510 is produced is to converting unit 520, for estimating according to the multiple
Survey channel response and perform the operation that time domain response is converted to frequency domain response, (figure is got the bid to produce multiple estimated channel frequency responses
It is shown as Fh), and thereby result observes the spectral characteristic of wireless channel.The implementation of converting unit 520 can be to use fast Flourier
One FFT units of (the Fast Fourier Transform) technology of conversion.
Multiple estimated channel frequency responses that converting unit 520 is produced can be inputted to the computing unit 530, for foundation
Multiple estimated channel frequency responses produced by the converting unit 520 are calculated, so that computing unit 530 produces multiple meters
Calculation value (is denoted as CV) in figure.In one embodiment, computing unit 530 calculates the per a period of time of the carrier wave in multiple time points
Between the energy value put, therefore produce multiple energy values as above-mentioned calculated value, wherein, the time point can be appointing on time shaft
What, such as described energy value can be the carrier wave of fundamental frequency signal in a signal frame (Signal Frame) energy value at time point.
In addition, the embodiment for calculating the energy value can be the square value for the absolute value for calculating the estimated channel frequency response, it is another
Embodiment is so not limited thereto to calculate the square root of the absolute value of the estimated channel frequency response.
Multiple calculated values that computing unit 530 is produced can be inputted to the judge module 540, judge module 540 be used for according to
Judge whether the channel corresponding to the fundamental frequency signal is time varying channel states according to the plurality of calculated value, and produce a detecting result
(det_rst is denoted as in figure).Specifically, when judge module 540 can distinguish corresponding multiple according to the plurality of calculated value
Between point produce multiple proportionate relationships, and by be compared with a threshold value, to produce multiple comparative results, then further root
Perform and counted to produce count value according to comparative result, count value can be used to judge whether the channel corresponding to the fundamental frequency signal is
State.
Referring to Fig. 6, it is the schematic diagram of another embodiment of the detecting unit 202 shown in Fig. 1, as illustrated, and Fig. 5
Judge module 540 compare, judge module 540 is further included：One comparing unit 541, a counting unit 542 and one determine list
Member 543, wherein wantonly two or whole foregoing circuits can be incorporated into an integrated circuit or be individual circuit.
Referring again to Fig. 6, multiple calculated values that computing unit 530 is produced can be inputted to the judge module 540, relatively more single
Member 541 calculates the proportionate relationship between multiple calculated values according to the multiple calculated value, and is compared with a threshold value.It is real one
Apply in example, the proportionate relationship is the ratio value between one first calculated value and one second calculated value, wherein the first calculated value example
In this way in the energy value of a first first time point, the second calculated value is, for example, the energy at posterior second time point
Value, and it (can be slow that calculated value can be stored in a storage device after the corresponding time point is via produced by computing unit 530
Storage, buffer or volatile memory, not shown), the ratio value and a threshold of comparing unit 541 again according to correspondence time point
Value is compared, to produce comparative result.For example, when ratio value is the first calculated value divided by the second calculated value, threshold value are one
High threshold value (being, for example, 2) and when comparative result is that ratio value is more than the high threshold value, the first calculated value is more than second and calculated
More than 2 times of value；Or, when threshold value is a low threshold value (be, for example, 0.2) and comparative result be ratio value less than the low door
During threshold value, the first calculated value is less than the second calculated value.Therefore, carried out through the predetermined threshold value of the comparing unit 541 and one
Compare, can thereby obtain the proportionate relationship of the first calculated value and the second calculated value, and due to the first calculated value and the second calculated value
Different time points are corresponded to respectively, can thereby obtain the variation width of the first calculated value different time points corresponding with the second calculated value
Current count value plus one by degree, the meeting of counting unit 542 when comparative result points out that ratio value reaches threshold.By comprising
After one section of period at multiple time points, accumulation result that determining means 543 can be according to count value, if the count value is pre- more than one
Definite value, then represent in correspondence different time points, more than in each time point of predetermined value, its calculated value and its previous time
All there is suitable amplitude of fluctuation between the calculated value of point, the count value that determining means 543 can accordingly produced by accumulation result judges
The wireless channel is dynamic.Note that foregoing high threshold value and low threshold value can simultaneously or asynchronously implement, imply that comparison list
Member 541 can simultaneously or do not compare simultaneously, rear time point the second calculated value whether be more than preceding time point first calculate
Whether value and the second calculated value at rear time point are less than the first calculated value at preceding time point, and the high threshold value with
Low threshold value can have a relativeness, such as high threshold value is that 1.2, low threshold value is 0.8, whether is respectively compared amplitude of fluctuation
More than 20%, or the high threshold value can not have a relativeness with low threshold value, such as high threshold value is 1.4, low door
Threshold value is 0.8, is respectively compared whether amplitude of fluctuation is more than 40% and 20%.
Referring again to Fig. 6, the running of the detecting unit 202 of another embodiment of the present invention is illustrated below.In this embodiment,
Detecting unit 202 be located at a T-DMB (Digital Terrestrial Multimedia Broadcast,
DTMB) system or DMB-ground/hand-held (Digital Multimedia Broadcast-Terrestrial/
Handheld, DMB-T/H) system receiving terminal, for receiving fundamental frequency signal, signal includes four-layer structure, and its structure is the cycle
Property, it is synchronous with natural time.Signal is then that in units of frame or signal frame, a basic signal frame is by signal frame head
(Frame Header) and signal frame body (Frame Body) constitute, signal frame head include pseudo-noise code, signal frame body be then by
OFDM symbol (Symbol) is constituted.Detecting unit 202 is located at ground digital multimedia broadcast system or digital many matchmakers
The receiving terminal of body Broadcasting-Terrestrial/hand system, the estimated channel response generation module 510 receives fundamental frequency signal, at first
Between point (correspondence one first frame), according to the response of fundamental frequency signal estimated channel, to produce the response of one first estimated channel；Converting unit
The response of first estimated channel is converted to frequency domain response by 520 by time domain response, to produce one first estimated channel frequency response；Meter
Unit 530 is calculated according to the first estimated channel frequency response, the first calculated value is calculated, and the first calculated value is stored in a storage device
(not shown)；The proportionate relationship of the first calculated value and a first calculated value is produced by comparing unit 541 again, and is closed according to the ratio
System produces one first comparative result with a threshold value；If the first comparative result, which is the proportionate relationship, is more than the threshold value, described
Count value produced by counting unit 542 adds one.Then, in one second time point (the second frame of correspondence), estimated channel response production
Raw module 510 is also stored up to computing unit 530 by identical program with producing one second calculated value, and the second calculated value being stored in into one
Cryopreservation device (not shown)；Comparing unit 541 according to the second calculated value and foregoing first calculated value for being stored in a storage device,
Calculate another proportionate relationship between the second calculated value and the first calculated value；Again by comparing unit 541 according to another proportionate relationship
One second comparative result is produced with a threshold value, if the second comparative result, which is another proportionate relationship, is more than the threshold value, institute
Count value produced by stating counting unit 542 plus one.In this embodiment, a cycle can be set as multiple frames, such as 20 or 40
Individual frame is the count value and a predetermined value added up in a cycle, then the cycle, if accumulation result is more than described make a reservation for
Value, then judge the wireless channel for dynamic.Complete after judging, then count value is reset (Reset) to carry out the dynamic of next cycle
State channel discrimination.Note that the order of step described in the present embodiment is merely illustrative, be embodied as it is possible under the premise of, no
Implementation with sequence of steps is also contained in the practical range of the present invention, and the first calculated value and corresponding to the second calculated value when
Between point can mutually be divided into an OFDM symbol (Symbol) or a frame (Frame), but be not limited.
Referring to Fig. 7, it is the schematic diagram of the another embodiment of the detecting unit 202 according to Fig. 1 of the present invention, such as figure institute
Show, compared with the 5th with Fig. 6 estimated channel response generation module 510, Fig. 7 estimated channel response generation module 510 is further
Comprising：One channel estimator 511 and a pseudo noise correlator 512, wherein can be incorporated into one integrated for wantonly two or whole foregoing circuits
In circuit or for individual circuit.
Referring again to Fig. 7, in this embodiment, detecting unit 202 is also located at connecing for ground digital multimedia broadcast system
Receiving end, for receiving fundamental frequency signal, and detecting unit 202 can be operated in both of which：One obtaining mode (Acquisition
Mode) and one follow the trail of pattern (Tracking Mode).In obtaining mode, pseudo noise correlator 512 calculates fundamental frequency signal and puppet
The association results of noise sequence, to produce estimated channel response, such as letter of the signal frame of ground digital multimedia broadcast system
Number frame head can carry a pseudo noise sequence, thereby to perform corresponding channel estimating.Similarly, estimated channel response can be by turning
The detecting result changed produced by after unit 520, computing unit 530 and judge module 540 are handled, whether to judge channel according to this
For time varying channel states.In the pattern of tracking, channel estimator 511 is calculated in fundamental frequency signal, and the channel corresponding to a subcarrier rings
Should, to produce estimated channel response, similarly, estimated channel response can pass through converting unit 520, computing unit 530 and sentence
Disconnected module 540 detecting result produced after handling, to judge whether channel is dynamic according to this.Therefore, ground digital multimedia
Broadcast system thereby can routinely carry out dynamic channel discrimination in obtaining mode and tracking pattern.
It is of the invention it is also proposed that a kind of dynamic channel discriminating conduct in addition, except shown device invention is outer, for performing movement
Property detecting, as depicted in the flow 80 in Fig. 8.Flow 80 can by the detecting unit 202 positioned at wireless communication receiver terminal circuit or
Its equivalent circuit is performed, and it includes the following steps：
Step 810：A fundamental frequency signal is received, the channel response to estimate the fundamental frequency signal in multiple time points is produced
Multiple estimated channel responses.This step can respond generation module 510 or its equivalent circuit to perform by Fig. 5 estimated channel.
Step 820：Time-domain and frequency-domain conversion is carried out to the response of the plurality of estimated channel, rung with producing multiple estimated channel frequencies
Should.This step can be performed by Fig. 5 converting unit 520 or its equivalent circuit.In one embodiment, this step is still included：
Perform a fast Fourier transform program.
Step 830：Multiple calculated values are calculated according to the plurality of estimated channel frequency response, wherein the plurality of calculated value is distinguished
Corresponding to multiple time points.This step can be performed by Fig. 5 computing unit 530 or its equivalent circuit.
Step 840：The channel status corresponding to the fundamental frequency signal is judged according to the plurality of calculated value.This step can be by
Fig. 5 judge module 540 or its equivalent circuit is performed.In one embodiment, this step is still included：Calculate between multiple calculated values
Ratio value；Compared proportions value and a threshold value are to produce multiple comparative results；And produce meter according to the plurality of comparative result
Numerical value, if wherein the count value be more than a predetermined value, judge the channel for dynamically.
In summary, the invention provides a kind of device and method for handling channel estimating, for the journey of root channel variation
Degree, selects appropriate channel estimating and measuring method.According to the present invention, no matter being dynamic channel or static letter for the channel for receiving signal
Road, communicator all can accurate estimated channel.
Presently preferred embodiments of the present invention is the foregoing is only, all equivalent changes done according to the claims in the present invention are with repairing
Decorations, should all belong to the covering scope of the present invention.
Claims (20)
1. a kind of communicator, includes：
One detecting unit, in a time interval, performing mobility detecting, to produce a detecting result；
One selecting unit, is coupled to the detecting unit, for according to the detecting result, one is selected from multiple channel estimating and measuring methods
Channel estimating and measuring method；And
One channel estimation unit, is coupled to the selecting unit, for according to the channel estimating and measuring method, to for receiving a signal
One channel performs a channel estimating.
2. communicator as claimed in claim 1, it is characterised in that the plurality of channel estimating and measuring method includes a least square
Method and a least fibre method.
3. communicator as claimed in claim 2, it is characterised in that when the detecting result indicates that the channel is a dynamic channel
When, the selecting unit selects the least squares method, and when it is a static channel that the detecting result, which indicates the channel, the selection
The Unit selection least fibre method.
4. communicator as claimed in claim 3, it is characterised in that when an intensity of variation of the channel in the time interval
During more than a pre-determined value, the channel is indicated as the dynamic channel, and when the change of the channel in the time interval
When change degree is less than the pre-determined value, the channel is indicated as the dynamic channel.
5. communicator as claimed in claim 1, it is characterised in that the time interval includes multiple frames.
6. communicator as claimed in claim 1, it is characterised in that the selecting unit according to the detecting result and the signal,
The channel estimating and measuring method is selected from the plurality of channel estimating and measuring method.
7. communicator as claimed in claim 6, it is characterised in that the signal includes a single-carrier signal and a multicarrier
Signal.
8. communicator as claimed in claim 7, it is characterised in that when the signal includes the single-carrier signal and the detecting
When as a result indicating the channel for a dynamic channel, the channel estimating and measuring method is a least squares method, and when the signal includes
When the single-carrier signal and the detecting result indicate the channel for a static channel, the channel estimating and measuring method is a lowest mean square
Method.
9. communicator as claimed in claim 7, it is characterised in that when the signal includes the multi-carrier signal and the detecting
When as a result indicating the channel for a dynamic channel, the channel estimating and measuring method is the least fibre method with one first group of parameter,
And when the signal includes the multi-carrier signal and the detecting result indicates the channel for a static channel, the channel estimating
Method is the least fibre method with one second group of parameter.
10. communicator as claimed in claim 7 a, it is characterised in that Memorability of first parameter is less than second ginseng
Several Memorability.
11. a kind of method of processing channel estimating, includes：
Mobility detecting in a time interval, is performed using a detecting unit, to produce a detecting result；
According to the detecting result, a channel estimating and measuring method is selected from multiple channel estimating and measuring methods using a selecting unit；And
According to the channel estimating and measuring method, estimated using a channel estimation unit to performing a channel for receiving a channel of a signal
Survey.
12. method as claimed in claim 11, it is characterised in that the plurality of channel estimating and measuring method includes a least squares method
And a least fibre method.
13. method as claimed in claim 12, it is characterised in that the step of according to the detecting result, use the selecting unit
The channel estimating and measuring method is selected from the plurality of channel estimating and measuring method to include：
When it is a dynamic channel that the detecting result, which indicates the channel, the least squares method is selected, and when the detecting result refers to
When showing the channel for a static channel, the least fibre method is selected.
14. method as claimed in claim 13, it is characterised in that when an intensity of variation of the channel is big in the time interval
When a pre-determined value, the channel is indicated as the dynamic channel, and when the change of the channel in the time interval
When degree is less than the pre-determined value, the channel is indicated as the dynamic channel.
15. method as claimed in claim 11, it is characterised in that the time interval includes multiple frames.
16. method as claimed in claim 11, it is characterised in that the selecting unit is estimated always according to the signal from the plurality of channel
The channel estimating and measuring method is selected in survey method.
17. method as claimed in claim 16, it is characterised in that the signal includes a single-carrier signal and multicarrier letter
Number.
18. method as claimed in claim 17, it is characterised in that when the signal includes the single-carrier signal and the detecting knot
When fruit indicates the channel for a dynamic channel, the channel estimating and measuring method is a least squares method, and when the signal includes this
When single-carrier signal and the detecting result indicate the channel for a static channel, the channel estimating and measuring method is a least fibre method.
19. method as claimed in claim 17, it is characterised in that when the signal includes the multi-carrier signal and the detecting knot
When fruit indicates the channel for a dynamic channel, the channel estimating and measuring method is the least fibre method with one first group of parameter, with
And when the signal includes the multi-carrier signal and the detecting result indicates the channel for a static channel, the channel estimating side
Method is the least fibre method with one second group of parameter.
20. method as claimed in claim 17 a, it is characterised in that Memorability of first parameter is less than second parameter
The Memorability.
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| CN201610044414.3A CN106998305A (en) | 2016-01-22 | 2016-01-22 | Handle the device and method of channel estimating |
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| CN109936738A (en) * | 2017-12-15 | 2019-06-25 | 晨星半导体股份有限公司 | Channel estimation circuit and relevant channel estimation method |
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| CN102130862A (en) * | 2011-04-26 | 2011-07-20 | 重庆邮电大学 | Method for reducing overhead caused by channel estimation of communication system |
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| CN101523748A (en) * | 2006-10-11 | 2009-09-02 | 艾利森电话股份有限公司 | Doppler frequency control of G-Rake receiver |
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