CN103428117B - The determination method and apparatus of channel estimation methods - Google Patents
The determination method and apparatus of channel estimation methods Download PDFInfo
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- CN103428117B CN103428117B CN201210149564.2A CN201210149564A CN103428117B CN 103428117 B CN103428117 B CN 103428117B CN 201210149564 A CN201210149564 A CN 201210149564A CN 103428117 B CN103428117 B CN 103428117B
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Abstract
The invention discloses the determination method and apparatus of a kind of channel estimation methods, wherein, the method includes: base station is terminal distribution Resource Block；Base station determines channel estimation methods according to the quantity of the Resource Block for terminal distribution.The present invention solves the technical problem that accuracy that the channel caused in prior art estimates is relatively low owing to every kind of channel estimation method all exists self shortcoming, has reached to improve the technique effect of channel estimation accuracy.
Description
Technical field
The present invention relates to the communications field, in particular to the determination method and apparatus of a kind of channel estimation methods.
Background technology
Uplink receiver channel of the prior art estimates mainly there are two kinds, is respectively as follows: time domain channel and estimates and channel estimation in frequency domain.
The method that time domain channel is estimated is mainly: after the frequency domain data obtaining pilot tone, and it is carried out DFT transform to after time domain,
Channel information is processed by time domain.The feature that time domain channel is estimated is to accurately determine the length of time window, will
Noise all suppresses to be zero outside window so that this time window is equivalent to a preferable rectangular filter window, but when the RB number of terminal is non-
Time often less, arise that time domain up-sampling point is very few, cause the rectangular filter window can accurately not the asking of division signals and noise region
Topic so that the accuracy that the information of channel is estimated is substantially reduced.
The method of channel estimation in frequency domain is mainly: after obtaining the frequency domain data of pilot tone, uses FIR filter and above-mentioned frequency domain
Data sequence carries out convolution.In the ideal case, the rectangular filter window that FIR filter is equal in time domain, yet with being subject to
The impact of filter order, FIR filter is unlikely to be preferable rectangular window in time domain, can there is an intermediate zone, so
In the case of RB quantity is many, its channel estimating performance is worse than time domain channel and estimates.But, when RB number is little, due to its property
Can will not be affected by counting, so the accuracy of channel information of frequency domain estimation is equal to the situation that RB quantity is many, and now
Its channel estimating performance is better than time-domain channel estimating method.
Knowable to above-mentioned analysis, both methods of estimation have its respective advantage under different conditions, but there is also certain
Shortcoming so that the accuracy estimating channel is relatively low.
For above-mentioned problem, effective solution is the most not yet proposed.
Summary of the invention
The invention provides the determination method and apparatus of a kind of channel estimation methods, at least to solve in prior art due to every kind of letter
The technical problem that accuracy that the channel that channel estimation algorithm all exists self shortcoming and causes is estimated is relatively low.
According to an aspect of the invention, it is provided a kind of determination method of channel estimation methods, including: base station is terminal distribution
Resource Block；Base station determines channel estimation methods according to the quantity of the Resource Block for terminal distribution.
Preferably, channel estimation methods includes: frequency domain channel estimation method and time-domain channel estimating method.
Preferably, base station determines channel estimation methods according to the quantity of the Resource Block for terminal distribution, including: for terminal distribution
The quantity of Resource Block more than in the case of predetermined threshold, determine employing time-domain channel estimating method.
Preferably, base station determines channel estimation methods according to the quantity of the Resource Block for terminal distribution, including: for terminal distribution
The quantity of Resource Block less than or equal in the case of predetermined threshold, determine employing frequency domain channel estimation method.
Preferably, base station is terminal distribution Resource Block, including: base station receives the data message that terminal sends, and wherein, data are believed
Breath carries pilot tone and the time domain data corresponding to pilot tone；Time domain data is converted to frequency domain data by base station；Base station is that terminal is divided
Join Resource Block.
According to an aspect of the invention, it is provided the determination device of a kind of channel estimation methods, it is positioned at base station side, including: point
Join unit, be used for as terminal distribution Resource Block；Determine unit, for determining channel according to the quantity of the Resource Block for terminal distribution
Method of estimation.
Preferably, channel estimation methods includes: frequency domain channel estimation method and time-domain channel estimating method.
Preferably, determine that unit includes: first determines module, for the quantity at the Resource Block for terminal distribution more than predetermined threshold
In the case of value, determine employing time-domain channel estimating method.
Preferably, determine that unit includes: second determines module, be less than or equal to for the quantity at the Resource Block for terminal distribution
In the case of predetermined threshold, determine employing frequency domain channel estimation method.
Preferably, allocation unit includes: receiver module, for receiving the data message that terminal sends, wherein, in data message
Carry pilot tone and the time domain data corresponding to pilot tone；Modular converter, for being converted to frequency domain data by time domain data；Select mould
Block, is used for as terminal distribution Resource Block.
In embodiments of the present invention, according to the quantity of the Resource Block for terminal distribution, base station determines that the data sending terminal are carried out
The method that channel is estimated.Can select a kind of at the present situation lower channel estimation effect by the way according to the quantity of Resource Block
Preferably channel estimates that mode carries out channel estimation, thus solves in prior art owing to every kind of channel estimation method all exists certainly
The shortcoming of body and the relatively low technical problem of accuracy that the channel that causes is estimated, reached to improve the technology effect of channel estimation accuracy
Really.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, and the present invention shows
Meaning property embodiment and explanation thereof are used for explaining the present invention, are not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is a kind of preferred flow charts of the determination method of channel estimation methods according to embodiments of the present invention；
Fig. 2 be base station according to embodiments of the present invention be a kind of preferred flow charts of the method for terminal distribution Resource Block；
Fig. 3 is a kind of preferred structure block diagram of the determination device of channel estimation methods according to embodiments of the present invention；
Fig. 4 is the another kind of preferred structure block diagram of the determination device of channel estimation methods according to embodiments of the present invention；
Fig. 5 is another preferred structure block diagram of the determination device of channel estimation methods according to embodiments of the present invention.
Detailed description of the invention
Below with reference to accompanying drawing and describe the present invention in detail in conjunction with the embodiments.It should be noted that in the case of not conflicting,
Embodiment in the application and the feature in embodiment can be mutually combined.
Present embodiments provide a kind of determination method of channel estimation methods, as it is shown in figure 1, the method comprises the steps:
Step S102: base station is terminal distribution Resource Block；
Step S104: base station determines channel estimation methods according to the quantity of the Resource Block for terminal distribution.
In the above-described embodiment, according to the quantity of the Resource Block for terminal distribution, base station determines that the data sending terminal are carried out
The method that channel is estimated.Can select a kind of at the present situation lower channel estimation effect by the way according to the quantity of Resource Block
Preferably channel estimates that mode carries out channel estimation, thus solves in prior art owing to every kind of channel estimation method all exists certainly
The shortcoming of body and the relatively low technical problem of accuracy that the channel that causes is estimated, reached to improve the technology effect of channel estimation accuracy
Really.
In a preferred embodiment, above-mentioned channel estimation methods includes: frequency domain channel estimation method and time domain channel estimation side
Method.In aforesaid way, if when channel is estimated can according to the difference of condition select respectively time-domain channel estimating method or
Frequency domain channel estimation method, can take two kinds of respective advantages of method and make up inferior position each other, estimates such that it is able to improve channel
Accuracy.Further, by the difference of Resource Block quantity as condition, select a kind of channel estimation methods to carry out channel and estimate
Count the performance that entirely can be equivalent to simultaneously use two kinds of channel estimation methods.By the way can substantially reduction process answer
Miscellaneous degree, meanwhile, mode can be avoided because of other channel estimation sides to determine to use relatively good channel to estimate according to Resource Block quantity
The error that formula is brought into, thus improve estimated accuracy.
In a preferred embodiment, base station can arrange the threshold value of a Resource Block quantity, judges to use according to this threshold value
The channel of time domain estimates that mode still uses the channel of frequency domain to estimate mode.Preferably, according to the number of the Resource Block for terminal distribution
Amount determines channel estimation methods, including:
1), in the case of the quantity at the Resource Block for terminal distribution is more than predetermined threshold, employing time-domain channel estimating method is determined.
2), in the case of the quantity at the Resource Block for terminal distribution is less than or equal to predetermined threshold, employing channel estimation in frequency domain is determined
Method.
In above-mentioned preferred embodiment, because utilizing time-domain channel estimating method to carry out channel estimation Resource Block quantity is little when,
The poor-performing that channel is estimated, and Resource Block quantity is bigger when, frequency domain channel estimation method carries out channel and estimates, frequency domain channel
The performance of method of estimation is worse than again time-domain channel estimating method.By the way, Resource Block quantity is little when, frequency domain is selected
Channel estimation methods, selects time-domain channel estimating method Resource Block quantity is big when, using resource number of blocks as selecting channel
The alternative condition of method of estimation, thus ensure that the channel estimating performance improving system in the case of not increasing system complexity.
In a preferred embodiment, base station is the method for terminal distribution Resource Block, as in figure 2 it is shown, comprise the steps:
Step S202: base station receives the data message that terminal sends, and wherein, carries pilot tone and corresponding to pilot tone in data message
Time domain data；
Step S204: time domain data is converted to frequency domain data by base station；
Step S206: base station is according to for terminal distribution Resource Block.
Additionally providing the determination device of a kind of channel estimation methods in the present embodiment, this device is used for realizing above-described embodiment and excellent
Select embodiment, carry out repeating no more of explanation.As used below, term " module " " unit " can be real
The software of existing predetermined function and/or the combination of hardware.Although the device described by following example preferably realizes with software, but
It is hardware, or the realization of the combination of software and hardware also may and be contemplated.Fig. 2 is the determination dress of channel estimation methods
A kind of preferred structure block diagram put, is positioned at base station side, as it is shown on figure 3, this device includes: allocation unit 302 and determine unit
304, below this structure is illustrated.
Allocation unit 302, is used for as terminal distribution Resource Block；
Determine unit 304, for determining channel estimation methods according to the quantity of the Resource Block for terminal distribution.
In a preferred embodiment, as shown in Figure 4, determine that unit 304 includes: first determines module 402, for for
The quantity of the Resource Block of terminal distribution, more than in the case of predetermined threshold, determines employing time-domain channel estimating method.And/or second is true
Cover half block 404, in the case of the quantity at the Resource Block for terminal distribution is less than or equal to predetermined threshold, determines employing frequency domain
Channel estimation methods.
In a preferred embodiment, as it is shown in figure 5, allocation unit 302 includes: receiver module 502, it is used for receiving terminal
The data message sent, wherein, carries pilot tone and the time domain data corresponding to pilot tone in data message；Modular converter 504, uses
In time domain data is converted to frequency domain data；Distribution module 506, is used for as terminal distribution Resource Block.
In another embodiment, additionally providing a kind of software, this software is used for performing above-described embodiment and preferred embodiment
Described in technical scheme.
In another embodiment, additionally providing a kind of storage medium, in this storage medium, storage has above-mentioned software, this storage
Medium includes but not limited to: CD, floppy disk, hard disk, scratch pad memory etc..
As can be seen from the above description, present invention achieves following technique effect: base station is according to the resource for terminal distribution
The quantity of block determines the method that the data sending terminal carry out channel estimation.By the way can be according to the number of Resource Block
Amount selects one to estimate that mode carries out channel estimation at the present situation preferable channel of lower channel estimation effect, thus solves existing
The relatively low technology of accuracy that the channel caused owing to every kind of channel estimation method all exists self shortcoming in technology is estimated is asked
Topic, has reached to improve the technique effect of channel estimation accuracy.
Obviously, those skilled in the art should be understood that each module of the above-mentioned present invention or each step can be with general calculating
Device realizes, and they can concentrate on single calculating device, or is distributed on the network that multiple calculating device is formed,
Alternatively, they can realize with calculating the executable program code of device, it is thus possible to be stored in storing device
In perform by calculating device, and in some cases, can with the order being different from herein perform shown or described by step
Suddenly, or they are fabricated to respectively each integrated circuit modules, or the multiple modules in them or step are fabricated to single
Integrated circuit modules realizes.So, the present invention is not restricted to the combination of any specific hardware and software.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for those skilled in the art
For, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, any amendment of being made, etc.
With replacement, improvement etc., should be included within the scope of the present invention.
Claims (10)
1. the determination method of a channel estimation methods, it is characterised in that including:
Base station is terminal distribution Resource Block；
Described base station determines channel estimation methods according to the quantity of the Resource Block for described terminal distribution.
Method the most according to claim 1, it is characterised in that described channel estimation methods includes: frequency domain channel estimation method
And time-domain channel estimating method.
Method the most according to claim 2, it is characterised in that described base station is according to the number of the Resource Block for described terminal distribution
Amount determines channel estimation methods, including:
In the case of the quantity of the Resource Block for described terminal distribution is more than predetermined threshold, determine that employing time domain channel is estimated
Method.
Method the most according to claim 2, it is characterised in that described base station is according to the number of the Resource Block for described terminal distribution
Amount determines channel estimation methods, including:
In the case of the quantity of the Resource Block for described terminal distribution is less than or equal to predetermined threshold, determine employing frequency domain letter
Channel estimation method.
5. according to the method according to any one of claim 1-4, it is characterised in that described base station is described terminal distribution Resource Block,
Including:
Described base station receives the data message that described terminal sends, and wherein, carries pilot tone and correspondence in described data message
Time domain data in described pilot tone；
Described time domain data is converted to frequency domain data by described base station；
Described base station is described terminal distribution Resource Block.
6. the determination device of a channel estimation methods, it is characterised in that be positioned at base station side, including:
Allocation unit, is used for as terminal distribution Resource Block；
Determine unit, for determining channel estimation methods according to the quantity of the Resource Block for described terminal distribution.
Device the most according to claim 6, it is characterised in that described channel estimation methods includes: frequency domain channel estimation method
And time-domain channel estimating method.
Device the most according to claim 7, it is characterised in that described determine that unit includes:
First determines module, in the case of the quantity at the Resource Block for described terminal distribution is more than predetermined threshold, really
Surely time-domain channel estimating method is used.
Device the most according to claim 6, it is characterised in that described determine that unit includes:
Second determines module, for being less than or equal to the situation of predetermined threshold in the quantity of the Resource Block for described terminal distribution
Under, determine employing frequency domain channel estimation method.
10. according to the device according to any one of claim 6-9, it is characterised in that described allocation unit includes:
Receiver module, for receiving the data message that described terminal sends, wherein, carries pilot tone in described data message
With the time domain data corresponding to described pilot tone；
Modular converter, for being converted to frequency domain data by described time domain data；
Distribution module, is used for as described terminal distribution Resource Block.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009128657A2 (en) * | 2008-04-16 | 2009-10-22 | Lg Electronics Inc. | Method for transmitting and receiving data using pilot structure |
| CN101848183A (en) * | 2010-04-06 | 2010-09-29 | 中国人民解放军信息工程大学 | Channel estimation method and device in multiple input multiple output OFDM (Orthogonal Frequency Division Multiplexing) system |
| CN102143096A (en) * | 2010-07-16 | 2011-08-03 | 华为技术有限公司 | Transmitted physical resource block, channel estimation method, base station and user equipment |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009128657A2 (en) * | 2008-04-16 | 2009-10-22 | Lg Electronics Inc. | Method for transmitting and receiving data using pilot structure |
| CN101848183A (en) * | 2010-04-06 | 2010-09-29 | 中国人民解放军信息工程大学 | Channel estimation method and device in multiple input multiple output OFDM (Orthogonal Frequency Division Multiplexing) system |
| CN102143096A (en) * | 2010-07-16 | 2011-08-03 | 华为技术有限公司 | Transmitted physical resource block, channel estimation method, base station and user equipment |
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