CN103428117A - Method and device for determining channel estimation method - Google Patents
Method and device for determining channel estimation method Download PDFInfo
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- CN103428117A CN103428117A CN2012101495642A CN201210149564A CN103428117A CN 103428117 A CN103428117 A CN 103428117A CN 2012101495642 A CN2012101495642 A CN 2012101495642A CN 201210149564 A CN201210149564 A CN 201210149564A CN 103428117 A CN103428117 A CN 103428117A
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Abstract
The invention discloses a method and device for determining a channel estimation method. The method comprises the steps that a base station distributes resource blocks for terminals, and determines the channel estimation method according to the number of the resource blocks distributed for the terminals. The method and device for determining the channel estimation method solves the technical problem that accuracy of channel estimation is low due to the fact that each channel estimation method has own defects in the prior art, and achieves the technical effect of improving the accuracy of channel estimation.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of definite method and apparatus of channel estimation methods.
Background technology
Uplink receiver channel estimating of the prior art mainly contains two kinds, is respectively: time domain channel is estimated and channel estimation in frequency domain.
The method that time domain channel is estimated is mainly: after the frequency domain data that obtains pilot tone, it is carried out after DFT transforms to time domain, on time domain, channel information being processed.The characteristics that time domain channel is estimated are to determine exactly the length of time window, the whole inhibition of noise is zero outside window, make this time window be equivalent to a desirable rectangular filter window, yet when the RB of terminal number is considerably less, just there will be time domain up-sampling point very few, cause the rectangular filter window can accurately division signals and the problem of noise region, make the accuracy of the information estimator of channel greatly reduce.
The method of channel estimation in frequency domain is mainly: after the frequency domain data that obtains pilot tone, use FIR filter and above-mentioned frequency domain data sequence to carry out convolution.In the ideal case, the FIR filter is equal to the rectangular filter window on time domain, yet due to the impact that is subject to filter order, the FIR filter can not be desirable rectangular window on time domain, can there is a transition band, so, in the situation that RB quantity is many, its channel estimating performance is worse than time domain channel and estimates.Yet seldom the time, due to the impact that its performance can not be counted, so the accuracy of the channel information that frequency domain is estimated is equal to the situation that RB quantity is many, and now its channel estimating performance is better than time-domain channel estimating method at the RB number.
From above-mentioned analysis, these two kinds of methods of estimation have its advantage separately under different conditions, yet also have certain shortcoming, make the accuracy of channel estimating lower.
For above-mentioned problem, effective solution is not yet proposed at present.
Summary of the invention
The invention provides a kind of definite method and apparatus of channel estimation methods, at least to solve the lower technical problem of accuracy of the channel estimating that all exists the shortcoming of self to cause due to every kind of channel estimation method in prior art.
According to an aspect of the present invention, provide a kind of definite method of channel estimation methods, having comprised: base station is the terminal distribution Resource Block; Channel estimation methods is determined according to the quantity of the Resource Block for terminal distribution in base station.
Preferably, channel estimation methods comprises: frequency domain channel estimation method and time-domain channel estimating method.
Preferably, channel estimation methods is determined according to the quantity for the Resource Block of terminal distribution in base station, comprising: in the situation that, for the quantity of the Resource Block of terminal distribution is greater than predetermined threshold, determine and adopt time-domain channel estimating method.
Preferably, channel estimation methods is determined according to the quantity for the Resource Block of terminal distribution in base station, comprising: in the situation that, for the quantity of the Resource Block of terminal distribution is less than or equal to predetermined threshold, determine and adopt frequency domain channel estimation method.
Preferably, base station is the terminal distribution Resource Block, comprising: the data message that the base station receiving terminal sends wherein, carries pilot tone and corresponding to the time domain data of pilot tone in data message; Base station is converted to frequency domain data by time domain data; Base station is the terminal distribution Resource Block.
According to an aspect of the present invention, provide a kind of definite device of channel estimation methods, be positioned at base station side, having comprised: allocation units are used to the terminal distribution Resource Block; Determining unit, determine channel estimation methods for the quantity of the Resource Block according to for terminal distribution.
Preferably, channel estimation methods comprises: frequency domain channel estimation method and time-domain channel estimating method.
Preferably, determining unit comprises: the first determination module, and in the situation that, for the quantity of the Resource Block of terminal distribution is greater than predetermined threshold, determine and adopt time-domain channel estimating method.
Preferably, determining unit comprises: the second determination module, and in the situation that, for the quantity of the Resource Block of terminal distribution is less than or equal to predetermined threshold, determine and adopt frequency domain channel estimation method.
Preferably, allocation units comprise: receiver module, and the data message sent for receiving terminal, wherein, carry pilot tone and corresponding to the time domain data of pilot tone in data message; Modular converter, for being converted to frequency domain data by time domain data; Select module, be used to the terminal distribution Resource Block.
In embodiments of the present invention, the method for the data of terminal transmission being carried out to channel estimating is determined in base station according to the quantity of the Resource Block for terminal distribution.By the way can according to the quantity of Resource Block select a kind of the present situation lower channel estimation effect preferably the channel estimating mode carry out channel estimating, thereby solved the lower technical problem of accuracy of the channel estimating that all exists the shortcoming of self to cause due to every kind of channel estimation method in the prior art, reached the technique effect that improves channel estimation accuracy.
The accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention the present invention does not form inappropriate limitation of the present invention for explaining.In the accompanying drawings:
Fig. 1 is a kind of preferred flow charts according to definite method of the channel estimation methods of the embodiment of the present invention;
Fig. 2 is a kind of preferred flow charts of the method that is the terminal distribution Resource Block of the base station according to the embodiment of the present invention;
Fig. 3 is a kind of preferred structure block diagram according to definite device of the channel estimation methods of the embodiment of the present invention;
Fig. 4 is the another kind of preferred structure block diagram according to definite device of the channel estimation methods of the embodiment of the present invention;
Fig. 5 is another the preferred structure block diagram according to definite device of the channel estimation methods of the embodiment of the present invention.
Embodiment
Hereinafter with reference to accompanying drawing, also describe the present invention in detail in conjunction with the embodiments.It should be noted that, in the situation that do not conflict, embodiment and the feature in embodiment in the application can combine mutually.
The present embodiment provides a kind of definite method of channel estimation methods, and as shown in Figure 1, the method comprises the steps:
Step S102: base station is the terminal distribution Resource Block;
Step S104: channel estimation methods is determined according to the quantity of the Resource Block for terminal distribution in base station.
In the above-described embodiment, the method for the data of terminal transmission being carried out to channel estimating is determined in base station according to the quantity of the Resource Block for terminal distribution.By the way can according to the quantity of Resource Block select a kind of the present situation lower channel estimation effect preferably the channel estimating mode carry out channel estimating, thereby solved the lower technical problem of accuracy of the channel estimating that all exists the shortcoming of self to cause due to every kind of channel estimation method in the prior art, reached the technique effect that improves channel estimation accuracy.
In a preferred implementation, above-mentioned channel estimation methods comprises: frequency domain channel estimation method and time-domain channel estimating method.In aforesaid way, if can select respectively time-domain channel estimating method or frequency domain channel estimation method according to the difference of condition when channel estimating, can get advantage separately of two kinds of methods and make up inferior position each other, thereby can improve the accuracy of channel estimating.Further, the difference by Resource Block quantity, as condition, is selected a kind of channel estimation methods to carry out channel estimating and can be equivalent to the performance of simultaneously using two kinds of channel estimation methods fully.Can obviously reduce the complexity of processing by the way, simultaneously, according to Resource Block quantity, determine to adopt channel estimating mode relatively preferably can avoid the error of bringing into because of other channel estimating modes, thereby improve estimated accuracy.
In a preferred implementation, base station can arrange the threshold value of a Resource Block quantity, according to this threshold value, judges that the channel estimating mode that adopts time domain still adopts the channel estimating mode of frequency domain.Preferably, according to the quantity of the Resource Block for terminal distribution, determine channel estimation methods, comprising:
1) in the situation that, for the quantity of the Resource Block of terminal distribution is greater than predetermined threshold, determine and adopt time-domain channel estimating method.
2) in the situation that, for the quantity of the Resource Block of terminal distribution is less than or equal to predetermined threshold, determine and adopt frequency domain channel estimation method.
In above-mentioned preferred implementation, because utilizing time-domain channel estimating method to carry out channel estimating when Resource Block quantity is little, the poor-performing of channel estimating, and frequency domain channel estimation method carries out channel and estimates when Resource Block quantity is larger, the performance of frequency domain channel estimation method is worse than again time-domain channel estimating method.By the way, select frequency domain channel estimation method when Resource Block quantity is little, select time-domain channel estimating method when Resource Block quantity is large, using the resource number of blocks as the alternative condition of selective channel method of estimation, thereby guaranteed in the situation that do not increase the channel estimating performance that system complexity has promoted system.
In a preferred implementation, the method that base station is the terminal distribution Resource Block, as shown in Figure 2, comprise the steps:
Step S202: the data message that the base station receiving terminal sends wherein, carries pilot tone and corresponding to the time domain data of pilot tone in data message;
Step S204: base station is converted to frequency domain data by time domain data;
Step S206: the base station basis is the terminal distribution Resource Block.
A kind of definite device of channel estimation methods also is provided in the present embodiment, and this device, for realizing above-described embodiment and preferred implementation, had carried out repeating no more of explanation.As used below, the combination of software and/or the hardware of predetermined function can be realized in term " module " " unit ".Although the described device of following examples is preferably realized with software, hardware, or the realization of the combination of software and hardware also may and be conceived.Fig. 2 is a kind of preferred structure block diagram of definite device of channel estimation methods, is positioned at base station side, and as shown in Figure 3, this device comprises: allocation units 302 and determining unit 304 below describe this structure.
Determining unit 304, determine channel estimation methods for the quantity of the Resource Block according to for terminal distribution.
In a preferred implementation, as shown in Figure 4, determining unit 304 comprises: the first determination module 402, and in the situation that, for the quantity of the Resource Block of terminal distribution is greater than predetermined threshold, determine and adopt time-domain channel estimating method.And/or second determination module 404, in the situation that, for the quantity of the Resource Block of terminal distribution is less than or equal to predetermined threshold, determine and adopt frequency domain channel estimation method.
In a preferred implementation, as shown in Figure 5, allocation units 302 comprise: receiver module 502, and the data message sent for receiving terminal, wherein, carry pilot tone and corresponding to the time domain data of pilot tone in data message; Modular converter 504, for being converted to frequency domain data by time domain data; Distribution module 506, be used to the terminal distribution Resource Block.
In another embodiment, also provide a kind of software, the technical scheme that this software is described for carrying out above-described embodiment and preferred implementation.
In another embodiment, also provide a kind of storage medium, stored above-mentioned software in this storage medium, 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, the present invention has realized following technique effect: the method for the data of terminal transmission being carried out to channel estimating is determined in base station according to the quantity of the Resource Block for terminal distribution.By the way can according to the quantity of Resource Block select a kind of the present situation lower channel estimation effect preferably the channel estimating mode carry out channel estimating, thereby solved the lower technical problem of accuracy of the channel estimating that all exists the shortcoming of self to cause due to every kind of channel estimation method in the prior art, reached the technique effect that improves channel estimation accuracy.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, and in some cases, can carry out step shown or that describe with the order be different from herein, perhaps they are made into respectively to each integrated circuit modules, perhaps a plurality of modules in them or step being made into to the single integrated circuit module realizes.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. definite method of a channel estimation methods, is characterized in that, comprising:
Base station is described terminal distribution Resource Block;
Channel estimation methods is determined according to the quantity of the Resource Block for described terminal distribution in described base station.
2. method according to claim 1, is characterized in that, described channel estimation methods comprises: frequency domain channel estimation method and time-domain channel estimating method.
3. method according to claim 2, is characterized in that, channel estimation methods is determined according to the quantity of the Resource Block for described terminal distribution in described base station, comprising:
In the situation that, for the quantity of the Resource Block of described terminal distribution is greater than predetermined threshold, determine and adopt time-domain channel estimating method.
4. method according to claim 2, is characterized in that, channel estimation methods is determined according to the quantity of the Resource Block for described terminal distribution in described base station, comprising:
In the situation that, for the quantity of the Resource Block of described terminal distribution is less than or equal to described predetermined threshold, determine and adopt frequency domain channel estimation method.
5. according to the described method of any one in claim 1-4, it is characterized in that, described base station is described terminal distribution Resource Block, comprising:
Described base station receives the data message that described terminal sends, and wherein, carries pilot tone in described data message and corresponding to the time domain data of described pilot tone;
Described base station is converted to frequency domain data by described time domain data;
Described base station is described terminal distribution Resource Block.
6. definite device of a channel estimation methods, is characterized in that, is positioned at base station side, comprising:
Allocation units, be used to described terminal distribution Resource Block;
Determining unit, determine channel estimation methods for the quantity of the Resource Block according to for described terminal distribution.
7. device according to claim 6, is characterized in that, described channel estimation methods comprises: frequency domain channel estimation method and time-domain channel estimating method.
8. device according to claim 7, is characterized in that, described determining unit comprises:
The first determination module, in the situation that, for the quantity of the Resource Block of described terminal distribution is greater than predetermined threshold, determine and adopt time-domain channel estimating method.
9. device according to claim 6, is characterized in that, described determining unit comprises:
The second determination module, in the situation that, for the quantity of the Resource Block of described terminal distribution is less than or equal to described predetermined threshold, determine and adopt frequency domain channel estimation method.
10. according to the described device of any one in claim 6-9, it is characterized in that, described allocation units comprise:
Receiver module, the data message sent for receiving described terminal, wherein, carry pilot tone and corresponding to the time domain data of described pilot tone in described data message;
Modular converter, for being converted to frequency domain data by described time domain data;
Distribution module, be used to described terminal distribution Resource Block.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022062950A1 (en) * | 2020-09-23 | 2022-03-31 | 华为技术有限公司 | Communication method and communication device |
Citations (3)
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|---|---|---|---|---|
| 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022062950A1 (en) * | 2020-09-23 | 2022-03-31 | 华为技术有限公司 | Communication method and communication device |
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