CN110417690A - A kind of method and relevant device for realizing flexible channels estimation - Google Patents
A kind of method and relevant device for realizing flexible channels estimation Download PDFInfo
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- CN110417690A CN110417690A CN201910526186.7A CN201910526186A CN110417690A CN 110417690 A CN110417690 A CN 110417690A CN 201910526186 A CN201910526186 A CN 201910526186A CN 110417690 A CN110417690 A CN 110417690A
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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
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/024—Channel estimation channel estimation algorithms
Abstract
The present embodiments relate to the narrowband fields Internet of Things NB-IoT, disclose a kind of method and relevant device for realizing flexible channels estimation.Wherein, estimate this method comprises: averagely being obtained the original channel in each described average window to the original channel signal in each average window；Based on the time gap between different average windows, dynamic updates IIR filter factor；The optimal estimation of present channel is obtained according to the original channel estimation in each described average window.It so, it is possible flexibly to obtain preferred channels signal estimation performance using received signal resource.
Description
Technical field
The present embodiments relate to the narrowband field Internet of Things NB-IoT, in particular to a kind of side for realizing flexible channels estimation
Method and relevant device.
Background technique
As the demand of Internet of Things is more and more, there is many Internet of Things communication solutions and standard.Wherein, narrowband
Internet of Things NB-IoT is the wide area network technical standard based on Cellular Networks.Protenchyma networking standard requires user terminal to realize
Low-power consumption continues working primary replacement battery for many years.In order to realize low-power consumption, user terminal needs to close as much as possible
System and various resources when sufficiently being opened using system are sended and received to realize.
Therefore, it is necessary to the technical solutions of various realization flexible channels estimations.
Summary of the invention
In view of this, embodiments of the present invention provide a kind of method for realizing flexible channels estimation, comprising:
Based on the time gap between different average windows, dynamic updates IIR filter factor；
Original letter in each described average window is averagely obtained to the original channel signal in each average window
Road estimation；
The optimal estimation of present channel is obtained according to the original channel estimation in each described average window
Embodiment of the present invention additionally provides a kind of device for realizing flexible channels estimation, comprising:
Dynamic update unit, for based on the time gap between different average windows, dynamic to update IIR filter factor；
Averaging unit, for averagely being obtained to the original channel signal in each average window, described each is average
Original channel estimation in window；
Obtaining unit is estimated for obtaining the optimal of present channel according to the original channel estimation in each described average window
Meter.
Embodiment of the present invention additionally provides a kind of terminal, comprising:
At least one processor；And
The memory being connect at least one described processor communication；Wherein,
The memory is stored with the instruction that can be executed by least one described processor, and described instruction is by described at least one
A processor executes, so that at least one described processor is able to carry out above-mentioned method.
Embodiment of the present invention additionally provides a kind of computer readable storage medium, is stored with computer program, the meter
Calculation machine program realizes above-mentioned method when being executed by processor.
Above embodiment of the present invention in terms of existing technologies, can flexibly be come using received signal resource
It obtains preferred channels signal and estimates performance.
Detailed description of the invention
One or more embodiments are illustrated by the picture in corresponding attached drawing, these exemplary theorys
The bright restriction not constituted to embodiment, the element in attached drawing with same reference numbers label are expressed as similar element, remove
Non- to have special statement, composition does not limit the figure in attached drawing.
Fig. 1 is the flow diagram of the method for the realization flexible channels estimation that embodiment of the present invention one provides；
Fig. 2 is the flow diagram of the method for the realization flexible channels estimation that the embodiment of the present invention one provides；
Fig. 3 a is the schematic diagram of time upper irregular reference signal position；
Fig. 3 b is position view of the NRS in a NB-IoT subframe；
Fig. 4 is the structural schematic diagram of the device for the realization flexible channels estimation that embodiment of the present invention two provides.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing to the present invention
Each embodiment be explained in detail.However, it will be understood by those skilled in the art that in each embodiment party of the present invention
In formula, in order to make the reader understand this application better, many technical details are proposed.But even if without these technical details
And various changes and modifications based on the following respective embodiments, the application technical solution claimed also may be implemented.
It is generally used for the scene that some volumes of transmitted data are small, mobility is low in view of narrowband internet-of-things terminal, to realize
Low-power consumption.It is various when user terminal needs to close system as much as possible and sufficiently open using system in order to realize low-power consumption
Resource sends and receivees to realize.It is therefore desirable to be able to realize the technical solution of flexible channels estimation.
For this purpose, embodiment of the present invention provides a kind of technical solution for realizing flexible channels estimation, can flexibly use
Received signal resource estimates performance to obtain preferred channels signal.
Embodiment one
Fig. 1 is the flow diagram of the method for the realization flexible channels estimation that embodiment of the present invention one provides.Such as Fig. 1 institute
Show, this method comprises:
Step 101, based on the time gap between different average windows, dynamic updates IIR filter factor；
Step 102, the original channel signal in each average window is averagely obtained in each described average window
Original channel estimation；
Step 103, the optimal estimation of present channel is obtained according to the original channel estimation in each described average window.
Wherein, the average window refers to the period of time T that channel remains unchanged.
Wherein, the time gap based between different average windows, dynamic update the coefficient of iir filter, comprising:
In each average window, the noise power in each described average window is estimated；
Based on the size of the noise power in each average window, dynamic, which updates, is applied to each average window
IIR filter factor.
Wherein, the original channel estimation in described each average window according to obtains the optimal estimation of present channel,
Include:
Noise power in each described average window is bigger, then the original channel estimation pair in each described average window
The optimal estimation contribution of the present channel is smaller.
Wherein, the original channel estimation in described each average window according to obtains the optimal estimation of present channel,
Include:
Noise power in each described average window is smaller, then the original channel estimation pair in each described average window
The optimal estimation contribution of the present channel is bigger.
Wherein, the method for realizing flexible channels estimation is applied to NB-IoT terminal.
Wherein, the method for realizing flexible channels estimation is applied to mobile context.
The technical solution of the offer of embodiment of the present invention one is provided below by a specific embodiment.
Embodiment one
Fig. 2 is the flow diagram of the method for the realization flexible channels estimation that the embodiment of the present invention one provides, such as Fig. 2 institute
Show, this method comprises:
Step 201, it is directed to the position irregular reference signal NRS in NB-IoT system, based between different average windows
Time gap, dynamic update IIR filter factor；
Wherein, in NB-IoT system, when terminal is in mobile context, received narrowband reference signal NRS is often
It is irregular.As shown in Figure 3a.
Wherein, average window refers to the period of time T that channel remains unchanged.For example, in Fig. 3 a, each number marked
Rectangular block is all independent average window, in these average windows, it can be assumed that channel remains unchanged；One average window may include
The observation of one or more NB-IoT reference signal.The reference signal can be NRS, (narrowband reference signal, Narrowband
Reference Signal), NPSS (primary synchronization signal, Narrowband primary synchronization signal)
Or NSSS (secondary synchronization signal, Narrowband Secondary Synchroniza signal).Such as time domain shown in Fig. 3 b
Upper: time slot (slot) length of NB (NB-IoT) is 0.5ms, has 7 symbols (symbol) in each time slot；NB is dispatched substantially
Unit is subframe, each subframe 1ms (2 slot)；It may include 4 NRS OFDM symbols in one 1 millisecond of subframe.
Wherein, based on the time gap between different average windows, dynamic updates IIR filter factor, i.e. update iir filter
Coefficient can promote the accuracy of channel estimation.Such as in each average window, the noise function in the average window is estimated
Rate；Based on the size of noise power in average window, dynamic updates the IIR filter factor for being applied to the average window.Between average window
Time gap refer to the time interval between average window, by taking Fig. 3 a as an example, count from left to right, first average window 4 and second
Average window 0 differs 6 average windows, i.e., it is the channel for being considered as observing that time gap, which is the 6. IIR filter factors updated at this time,
Correlation has been reduced to α between state6, channel correlation coefficient also embodies in Fig. 3.
In addition, how to update IIR filter factor according to the size of noise power is the prior art, details are not described herein.
Step 202, for mobile context, each is averagely obtained according to the original channel signal of each average window
Original channel estimation in average window；
For example, can choose one it is considered that the average window T that remains unchanged of channel and in the average window to being observed
To original channel signal averagely obtained the estimation of the original channel signal in the average window.The operation is repeated, is obtained
To the original channel estimation in each average window.
Wherein, how average computation is carried out to original channel signal and obtains original channel estimation, be the prior art herein not
It repeats again.
Step 203, the optimal estimation of acquisition present channel is estimated according to the original channel of whole average windows.
Wherein, in each average window, estimate the noise power in the average window.Noise is bigger, in the average window
Original channel estimates the contribution estimated present channel with regard to smaller.Conversely, working as in the average window, noise is lower, then it is average to assign this
Original channel corresponding to window estimates the bigger weight of signal.
Wherein, how to estimate that the noise power in average window is that details are not described herein for the prior art.Present channel it is optimal
Estimation refers to that the optimal combination carried out using the original channel estimation of whole average windows, circular can be various, such as
Simple linear averaging etc..
Embodiment two
Fig. 4 is the structural schematic diagram of the device for the realization flexible channels estimation that embodiment of the present invention two provides.Such as 4 institutes
Show,
The device includes:
Dynamic update unit, for based on the time gap between different average windows, dynamic to update IIR filter factor；
Averaging unit, for averagely being obtained to the original channel signal in each average window, described each is average
Original channel estimation in window；
Obtaining unit is estimated for obtaining the optimal of present channel according to the original channel estimation in each described average window
Meter.
Wherein, the average window refers to the period of time T that channel remains unchanged.
Wherein, the dynamic update unit is specifically used in each average window, estimates in each described average window
Noise power；
Based on the size of the noise power in each average window, dynamic, which updates, is applied to each average window
IIR filter factor.
Wherein, the obtaining unit, it is bigger specifically for the noise power in each described average window, then it is described each
Original channel estimation in a average window is smaller to the optimal estimation contribution of the present channel.
Wherein, the obtaining unit, it is smaller specifically for the noise power in each described average window, then it is described each
Original channel estimation in a average window is bigger to the optimal estimation contribution of the present channel.
Wherein, the device for realizing flexible channels estimation is applied to NB-IoT terminal.
Wherein, the device for realizing flexible channels estimation is applied to mobile context.
Embodiment of the present invention additionally provides a kind of terminal, comprising:
At least one processor；And
The memory being connect at least one described processor communication；Wherein,
The memory is stored with the instruction that can be executed by least one described processor, and described instruction is by described at least one
A processor executes, so that at least one described processor is able to carry out the side of realization flexible channels estimation described in any of the above-described
Method.
The embodiment of the invention also provides a kind of computer readable storage mediums, are stored with computer program, the calculating
The method of realization flexible channels estimation described in any of the above-described is realized when machine program is executed by processor.
Above-mentioned apparatus or computer readable storage medium can be configured in any NB-IoT terminal, execute any of the above-described
The method for realizing flexible channels estimation.
It will be understood by those skilled in the art that the operation for realizing the control unit in above-described embodiment method is can to pass through
Program is completed to instruct relevant hardware (sensor), which is stored in a storage medium, including some instructions are used
So that an equipment (can be single-chip microcontroller, chip etc.) or processor (processor) execute in each embodiment of the application
The operation that control unit executes.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can store journey
The medium of sequence code.
It will be understood by those skilled in the art that the various embodiments described above are realization specific embodiments of the present invention, and
In practical applications, can to it, various changes can be made in the form and details, without departing from the spirit and scope of the present invention.
Claims (10)
1. a kind of method for realizing flexible channels estimation, comprising:
Based on the time gap between different average windows, dynamic updates IIR filter factor；
The original channel in each described average window is averagely obtained to the original channel signal in each average window to estimate
Meter；
The optimal estimation of present channel is obtained according to the original channel estimation in each described average window.
2. the method according to claim 1, wherein the average window refers to the time that channel remains unchanged
Cycle T.
3. the method according to claim 1, wherein the time gap based between different average windows, is moved
The coefficient of state update iir filter, comprising:
In each average window, the noise power in each described average window is estimated；
Based on the size of the noise power in each average window, dynamic updates the IIR filter for being applied to each average window
Wave system number.
4. the method according to claim 1, wherein the original channel in described each average window according to
Estimation obtains the optimal estimation of present channel, comprising:
Noise power in each described average window is bigger, then the original channel in each described average window is estimated to described
The optimal estimation contribution of present channel is smaller.
5. the method according to claim 1, wherein the original channel in described each average window according to
Estimation obtains the optimal estimation of present channel, comprising:
Noise power in each described average window is smaller, then the original channel in each described average window is estimated to described
The optimal estimation contribution of present channel is bigger.
6. the method according to claim 1, wherein the method for realizing flexible channels estimation is applied to NB-
IoT terminal.
7. the method according to claim 1, wherein the method for realizing flexible channels estimation is applied to movement
Scene.
8. a kind of device for realizing flexible channels estimation characterized by comprising
Dynamic update unit, for based on the time gap between different average windows, dynamic to update IIR filter factor；
Averaging unit, for averagely being obtained in each described average window to the original channel signal in each average window
Original channel estimation；
Obtaining unit, for obtaining the optimal estimation of present channel according to the original channel estimation in each described average window.
9. a kind of terminal characterized by comprising
At least one processor；And
The memory being connect at least one described processor communication；Wherein,
The memory is stored with the instruction that can be executed by least one described processor, and described instruction is by described at least one
It manages device to execute, so that at least one described processor is able to carry out the method as described in any one of claims 1 to 7.
10. a kind of computer readable storage medium, is stored with computer program, which is characterized in that the computer program is located
It manages when device executes and realizes the described in any item methods of claim 1 to 7.
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| CN111147416A (en) * | 2019-12-23 | 2020-05-12 | 南京大鱼半导体有限公司 | Signal processing method and device of narrowband Internet of things, storage medium and electronic equipment |
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Application publication date: 20191105 |