CN106341354B - Control method and control device - Google Patents
Control method and control device Download PDFInfo
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- CN106341354B CN106341354B CN201610836329.0A CN201610836329A CN106341354B CN 106341354 B CN106341354 B CN 106341354B CN 201610836329 A CN201610836329 A CN 201610836329A CN 106341354 B CN106341354 B CN 106341354B
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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
- H04L25/0256—Channel estimation using minimum mean square error criteria
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
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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
- H04L25/0222—Estimation of channel variability, e.g. coherence bandwidth, coherence time, fading frequency
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Abstract
The present invention discloses a kind of control method for controlling radio communication base station.Control method using the channel information and pilot signal of passing time slot the following steps are included: estimate the channel of current time slots to obtain the channel information of current time slots, control radio communication base station obtains the first reception signal using the transmission initial data of current time slots, pilot signal, which is updated, using initial data obtains the long pilot signal of current time slots, and the channel information of current time slots is reevaluated to obtain the update channel information of current time slots using the long pilot signal of current time slots and the first reception signal, the update channel information of current time slots is used to update the channel information of the passing time slot of the lower time slot of iteration to estimate the channel information of next time slot.The present invention provides a kind of control device.Control method provided by the invention and control device update pilot signal using initial data and estimate channel using temporal channel correlation, can inhibit pilot pollution, obtain more accurate channel information.
Description
Technical field
It is the present invention relates to a kind of control method and control device, in particular to a kind of for controlling the control of radio communication base station
Method processed and control device.
Background technique
Radio communication base station usually utilizes the pilot signal estimating channel information of uplink, and is believed using the channel of estimation
The channel of breath optimization downlink transfer.The quantity of mutually orthogonal pilot signal is limited, and may need to make between neighboring community
Channel estimation is carried out with identical pilot signal, so as to lead to pilot pollution.Pilot pollution will cause call completion ratio and reduce, fall
The problems such as words rate rises and power system capacity reduces, limits the performance boost of wireless communication system.The length for extending pilot signal can
To increase the quantity of mutually orthogonal pilot signal, however, in this way, transmission pilot signal is more transmitted transmission time slot is occupied
Time causes efficiency of transmission to reduce.Therefore the pilot pollution problem is solved currently without mature scheme.
Summary of the invention
The present invention is directed at least solve one of the technical problems existing in the prior art.For this purpose, the present invention needs to provide one
The resource fairness distribution method and its optimization method of kind wireless communication energy simultaneous interpretation.
The control method of embodiment of the present invention, for controlling radio communication base station, which is characterized in that the control method
Include:
Estimate the channel of current time slots to obtain the letter of current time slots using the channel information and pilot signal of passing time slot
Road information, the channel information of the current time slots are used to describe the transmission characteristic of the channel of the current time slots；
The radio communication base station is controlled using the transmission initial data of the current time slots to obtain the first reception
Signal；
The pilot signal is updated using the initial data to obtain the long pilot signal of the current time slots；And
The current time slots are reevaluated using the long pilot signal and the first reception signal of the current time slots
To obtain the update channel information of the current time slots, the update channel information of the current time slots changes channel information for updating
The channel information of next time slot is estimated for the channel information of the passing time slot of next time slot.
In some embodiments, the control method includes updating the set of the activation user under current time slots.
In some embodiments, the letter of channel information and pilot signal the estimation current time slots using passing time slot
Road includes following sub-step with the channel information for obtaining current time slots:
Pilot signal described in transmission using the current time slots is to obtain the second reception signal；
Become using the channel that the channel information of the second reception signal and the passing time slot obtains the current time slots
Change the information of part；
The information of the channel variation part of current time slots described in Linear Estimation is to obtain the channel variation of the current time slots
Partial fading coefficients；And
The channel information of current time slots is reconstructed using the channel information and the fading coefficients of passing time slot.
In some embodiments, the information of the channel variation part of the Linear Estimation current time slots includes based on minimum
The Linear Estimation of mean-square error criteria.
In some embodiments, the control radio communication base station is former using the transmission of the current time slots
Beginning data transmit initial data including the use of channel coding or hybrid automatic repeat-request.
In some embodiments, the control radio communication base station is former using the transmission of the current time slots
Beginning data include receiving signal to described first to carry out Data Detection to obtain initial data.
In some embodiments, the Data Detection includes the Data Detection based on minimum mean square error criterion.
In some embodiments, described to receive signal weight using the long pilot signal of the current time slots and described first
The channel information of current time slots described in new estimation includes the channel estimation based on minimum mean square error criterion.
The control device of embodiment of the present invention, for controlling radio communication base station, which is characterized in that the control device
Including the first estimation module, control module, the second estimation module of update module grade.First estimation module is used for described first
Estimation module is used for the channel information of channel information and pilot signal the estimation current time slots using passing time slot, the control mould
Block is for controlling the radio communication base station using the transmission initial data of the current time slots to obtain the first reception letter
Number, update module described in the update module is used to update the pilot signal using the initial data described current to obtain
The long pilot signal of time slot, second estimation module receive letter using the long pilot signal of the current time slots and described first
Number the channel information of the current time slots is reevaluated to obtain the update channel information of the current time slots.
The base station system of embodiment of the present invention includes radio communication base station and control device.
In some embodiments, the control device further includes obtaining module.The acquisition module is described for obtaining
The set of the activation user of the radio communication base station service of current time slots.
In some embodiments, first estimation module includes transmission module, the first computing module, the second calculating mould
Block and third computing module.The transmission module is for pilot signal described in the transmission using the current time slots to obtain
Second receives signal, the channel information that first computing module is used to receive signal and the passing time slot using described second
Obtain the information of the channel variation part of the current time slots.Second computing module is for current time slots described in Linear Estimation
Channel variation part information to obtain the fading coefficients of the channel variation part of the current time slots, the third calculates mould
Block is used to reconstruct the channel information of current time slots using the channel information and the fading coefficients of passing time slot.
Control method and control device in embodiment of the present invention utilize the correlation between the channel of adjoining time slot
Channel estimation is carried out, and updates pilot signal using initial data and obtains long pilot signal, and using the long pilot signal to letter
Road carries out quadratic estimate, can reduce pilot pollution, improve the accuracy of channel estimation.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage of the invention is from combining in description of the following accompanying drawings to embodiment by change
It obtains obviously and is readily appreciated that, in which:
Fig. 1 is the flow diagram of the control method of embodiment of the present invention.
Fig. 2 is the functional block diagram of the control device of embodiment of the present invention.
Fig. 3 is the frame structure schematic diagram of the uplink of the control method of embodiment of the present invention.
Fig. 4 is another flow diagram of the control method of embodiment of the present invention.
Fig. 5 is another the functional block diagram of the control device of embodiment of the present invention.
Main element symbol description:
Control device 10 obtains module 11, the first estimation module 12, transmission module 122, the first computing module 124, second
Computing module 126, third computing module 128, control module 14, update module 16, the second estimation module 18, radio communication base station
20, base station system 100.
Specific embodiment
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.
It is exemplary below with reference to the embodiment of attached drawing description, for explaining only the invention, and cannot understand
For limitation of the present invention.
Referring to Fig. 1, the control method of embodiment of the present invention is for controlling radio communication base station.Control method include with
Lower step:
S12: estimate the channel of current time slots to obtain current time slots using the channel information and pilot signal of passing time slot
Channel information, the channel informations of the current time slots is used to describe the transmission characteristic of the channel of the current time slots；
S14: the radio communication base station is controlled using the transmission initial data of the current time slots to obtain first
Receive signal；
S16: the pilot signal is updated using the initial data to obtain the long pilot signal of the current time slots；And
S18: when reevaluating described current using the long pilot signal and the first reception signal of the current time slots
The channel information of gap is to obtain the update channel information of the current time slots, and the update channel information of the current time slots is for more
The channel information of the passing time slot of the new lower time slot of iteration is to estimate the channel information of next time slot.
Referring to Fig. 2, the control method of embodiment of the present invention can be real by the control device 10 of embodiment of the present invention
It applies, and for controlling radio communication base station 20.
In some embodiments, control device 10 can constitute base station system 100 with radio communication base station 20.
Control device 10 includes the first estimation module 12, control module 14, update module 16 and the second estimation module 18.The
One estimation module 12 is used for the channel information of channel information and pilot signal the estimation current time slots using passing time slot.Control mould
Block 14 controls the radio communication base station using the transmission initial data of the current time slots to obtain the first reception signal.
Update module 16 is used to update the pilot signal using the initial data to obtain the long pilot signal of the current time slots.
Second estimation module 18 is received for second estimation module using the long pilot signal of the current time slots and described first
Signal reevaluates the channel information of the current time slots to obtain the update channel information of the current time slots.
In other words, step S12 can be realized that step S14 can be realized by control module 14 by the first estimation module 12,
Step S16 can be realized that step S18 can be realized by the second estimation module 18 by update module 16.
In wireless communication procedure, there are certain correlations, especially base for the channel information between adjacent transmission time slot
When mobile terminal in system of standing 100 is in static or low mobility state, channel information between neighboring transmission time slot
Correlation is stronger.Therefore, the control method of embodiment of the present invention, control device 10 and base station system 100 utilize passing time slot
Channel information and pilot signal estimate the channel informations of current time slots, the channel of available accurate current time slots
Information.In addition, updating pilot signal with initial data again obtains long pilot signal, when reevaluating current using long pilot signal
The channel information of gap, and the channel information of the passing time slot as next time slot can reduce pilot pollution, further increase letter
The accuracy of road information estimation.This is because mutually orthogonal pilot signal quantity is limited, when the shifting for being in communications status
When the quantity of dynamic terminal is more, it may need to carry out channel estimation, pilot signal using identical pilot signal between neighboring community
Multiplexing influence channel estimation accuracy.After updating pilot signal, long pilot signal is more compared with original pilot signal
The sequence of one section of initial data, so that the correlation between long pilot signal and original pilot signal reduces, even if more
In the case that a mobile terminal is multiplexed original pilot signal, since the initial data of each mobile terminal transmission is different, finally
The long pilot signal constituted is also corresponding different, therefore will not interfere to the channel estimation of radio communication base station 20.
The channel information of any one time slot is used to describe the transmission characteristic i.e. channel response of the channel of corresponding time slot.Signal
When transmitting in the channel, the interference of multipath fading, noise will receive, therefore, it is necessary to channel information, that is, channels to any time slot
Response is accurately estimated, to facilitate radio communication base station 20 correctly to demodulate the initial data of mobile terminal transmission.
Passing time slot refers to the preceding n time slot of current time slots, preceding n time slot can be current time slots previous time slot or
Preceding multiple time slots of person's current time slots.
Referring to Fig. 3, being intended to carry out channel estimation twice to the channel in corresponding time slot in any time slot of uplink
And the update of a pilot signal.Original pilot signal is identical in the frame structure of any time slot, each slot transmission
Initial data and obtained updated long pilot signal be then different.
Referring to Fig. 4, in some embodiments, control method is further comprising the steps of:
S11: the set of the activation user of the radio communication base station service of the current time slots is obtained.
Referring to Fig. 5, the control device 10 of embodiment of the present invention includes obtaining module 11.Module 11 is obtained for obtaining
The set for the activation user that the radio communication base station 20 of current time slots services.
Since radio communication base station 20 will receive the communication request of multiple users under same time slot, user under the time slot
Communication request number be even larger than radio communication base station 20 can load maximum communication quantity.Therefore, in each transmission
In gap, needs to dispatch out a certain number of users from the user of all request communication using acquisition module 11, obtain these
The collection merging of user allows the user in the set to communicate.
Referring again to Fig. 4, in some embodiments, the step S12 in control method includes following sub-step:
S122: pilot signal described in the transmission using the current time slots is to obtain the second reception signal；
S124: the letter of the current time slots is obtained using the channel information of the second reception signal and the passing time slot
The information of road changing unit；
S126: the information of the channel variation part of current time slots described in Linear Estimation is to obtain the channel of the current time slots
The fading coefficients of changing unit；And
S128: the channel information of current time slots is reconstructed using the channel information and the fading coefficients of passing time slot.
Referring again to Fig. 5, in some embodiments, the first estimation module 12 in control device 10 includes transmission module
122, the first computing module 124, the second computing module 126, third computing module 128.Transmission module 122 described in utilization for working as
To obtain the second reception signal, the first computing module 124 is used to utilize described the pilot signal described in the transmission of preceding time slot
The channel information of two reception signals and the passing time slot obtains the information of the channel variation part of the current time slots, the second meter
Module 126 is calculated for the information of the channel variation part of current time slots described in Linear Estimation to obtain the channel of the current time slots
The fading coefficients of changing unit, third computing module 128 are used for channel information and the fading coefficients weight using passing time slot
Structure goes out the channel information of current time slots.
In other words, step S122 can be realized by transmission module 122, and step S124 can be by the first computing module 124
It realizes, step S126 can be realized that step S128 can be realized by third computing module 128 by the second estimation module 12.
The channel information for the current time slots n that first estimation module 12 estimates is a more accurate estimated value, this is
Since for communicating user, there are certain correlations for channel between two adjoining time slots, and can use phase relation
The correlation degree of both number descriptions, especially when user is in the mobile state of static or low speed, two adjoining time slots it
Between correlation it is stronger, related coefficient is also bigger.Have the characteristics that correlation according to channel between two adjacent time-slots, it can will be current
The channel information of time slot, which is regarded as, to be made of the channel information of the channel information of non-changing unit and changing unit.Wherein,
The channel information of non-changing unit is obtained by the channel information of passing time slot and the product of related coefficient.Due to it is passing when
The channel information of gap has been an accurate estimated value, therefore, when using step S12 description channel estimation methods into
The channel estimation of row current time slots has included a part of accurately channel information value in obtained channel information, exist compared with
The part of big error is only that the information of channel variation part, thus the error of the channel information finally obtained is relatively small.And
Traditional channel estimation methods directly using pilot signal carry out channel estimation, obtained channel information do not include a part more
Accurate channel information value, the error of whole channel information because obtained from are also larger.
In some embodiments, the information of the channel variation part of Linear Estimation current time slots includes being based on lowest mean square
The channel estimation of error criterion.
Since there are white Gaussian noises in channel, and the multipath effect in transmission process can generate the interference between subcarrier
ICI.Therefore the channel estimation methods based on minimum mean square error criterion are used, have good inhibition to ICI and white Gaussian noise
Effect, available more accurate channel information.
In some embodiments, control radio communication base station 20 includes using the transmission initial data of current time slots
Initial data is transmitted using channel coding or hybrid automatic repeat-request.
Due to the time-varying characteristics of channel, multipath fading and various artificial and natural noise interference, data are in the channel
The decline and phase shift that will receive different amplitudes when transmission cause receiving end to receive the information of mistake.It therefore, can be in transmission
Increase redundant code and check code in the code stream of data, reduce the bit error rate of signal, improve the data of transmission anti-interference ability and
The reliability of transmission.Also it can use hybrid automatic repeat request technology to carry out data transmission.Hybrid automatic repeat request technology
Including the error control methods such as forward error correction and automatic repeat request, the bit error rate that can reduce system ensures the matter of data transmission
Amount, lifting system handling capacity and improve data transfer efficiency.
In some embodiments, control radio communication base station 40 utilizes the transmission initial data of the current time slots
Data Detection is carried out including receiving signal to first to obtain initial data.
The first reception signal that radio communication base station 20 receives is the signal not demodulated, is needed to first reception
Signal carries out Data Detection to obtain initial data.
In some embodiments, the Data Detection includes the Data Detection based on minimum mean square error criterion.
Data Detection based on minimum mean square error criterion can with the interference of repressor intercarrier and white Gaussian noise, thus
Obtain accurate initial data.
In some embodiments, when reevaluating current using the long pilot signal of current time slots and the first reception signal
The channel information of gap includes the channel estimation based on minimum mean square error criterion.
Multipath effect and white Gaussian noise existing for channel can interfere the channel estimation of radio communication base station 20.It can
The accuracy of channel estimation is improved to inhibit to interfere to carry out channel estimation using minimum mean square error criterion.
In the description of this specification, reference term " embodiment ", " some embodiments ", " schematically implementation
The description of mode ", " example ", specific examples or " some examples " etc. means the tool described in conjunction with the embodiment or example
Body characteristics, structure, material or feature are contained at least one embodiment or example of the invention.In the present specification,
Schematic expression of the above terms are not necessarily referring to identical embodiment or example.Moreover, the specific features of description, knot
Structure, material or feature can be combined in any suitable manner in any one or more embodiments or example.
Any process described otherwise above or method description are construed as in flow chart or herein, and expression includes
It is one or more for realizing specific logical function or process the step of executable instruction code module, segment or portion
Point, and the range of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discussed suitable
Sequence, including according to related function by it is basic simultaneously in the way of or in the opposite order, Lai Zhihang function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
Each functional unit in various embodiments of the present invention can integrate in a processing module, be also possible to each
A unit physically exists alone, and can also be integrated in a module with two or more units.Above-mentioned integrated module was both
It can take the form of hardware realization, can also be realized in the form of software function module.
Although embodiments of the present invention have been shown and described above, it is to be understood that above embodiment is
Illustratively, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be right
Above-mentioned implementation implementation is changed, modifies, replacement and variant.
Claims (12)
1. a kind of control method, for controlling radio communication base station, which is characterized in that the control method the following steps are included:
Channel using channel information and pilot signal the estimation current time slots of passing time slot is believed with the channel for obtaining current time slots
Breath, the channel information of the current time slots are used to describe the transmission characteristic of the channel of the current time slots；
The radio communication base station is controlled using the transmission initial data of the current time slots to obtain the first reception signal；
The pilot signal is updated using the initial data to obtain the long pilot signal of the current time slots, the long pilot tone
Signal sequence of the initial data more than the pilot signal before update；And
The channel of the current time slots is reevaluated using the long pilot signal and the first reception signal of the current time slots
Information is to obtain the update channel information of the current time slots, and the update channel information of the current time slots is for updating under iteration
The channel information of the passing time slot of one time slot is to estimate the channel information of next time slot.
2. control method as described in claim 1, which is characterized in that the control method the following steps are included:
Obtain the set of the activation user of the radio communication base station service of the current time slots.
3. control method as described in claim 1, which is characterized in that the channel information and pilot tone using passing time slot is believed
Number estimation current time slots channel information the step of include following sub-step:
Pilot signal described in transmission using the current time slots is to obtain the second reception signal；
The channel variation portion of the current time slots is obtained using the channel information of the second reception signal and the passing time slot
The information divided；
The information of the channel variation part of current time slots described in Linear Estimation is to obtain the channel variation part of the current time slots
Fading coefficients；And
The channel information of current time slots is reconstructed using the channel information and the fading coefficients of passing time slot.
4. control method as claimed in claim 3, which is characterized in that the channel variation part of the Linear Estimation current time slots
Information include the Linear Estimation based on minimum mean square error criterion.
5. control method as described in claim 1, which is characterized in that work as described in the control radio communication base station utilization
The transmission initial data of preceding time slot includes transmitting initial data using channel coding or hybrid automatic repeat-request.
6. control method as described in claim 1, which is characterized in that work as described in the control radio communication base station utilization
The transmission initial data of preceding time slot includes receiving signal to described first to carry out Data Detection to obtain initial data.
7. control method as claimed in claim 6, which is characterized in that the Data Detection includes quasi- based on least mean-square error
Data Detection then.
8. control method as described in claim 1, which is characterized in that the long pilot signal using the current time slots and
It includes the channel based on minimum mean square error criterion that the first reception signal, which reevaluates the channel information of the current time slots,
Estimation.
9. a kind of control device, for controlling radio communication base station, which is characterized in that the control device includes:
First estimation module, first estimation module are used to estimate using the channel information and pilot signal of passing time slot current
The channel information of time slot, the channel information of the current time slots are used to describe the transmission characteristic of the channel of the current time slots；
Control module, it is former using the transmission of the current time slots that the control module is used to control the radio communication base station
Beginning data are to obtain the first reception signal；
Update module, when the update module is used to update the pilot signal using the initial data to obtain described current
The long pilot signal of gap, long pilot signal sequence of the initial data more than the pilot signal before update
Column；And
Second estimation module, second estimation module receive letter using the long pilot signal of the current time slots and described first
Number the channel information of the current time slots is reevaluated to obtain the update channel information of the current time slots, the current time slots
Update channel information be used to update the lower time slot of iteration passing time slot channel information to estimate the letter of next time slot
Road information.
10. control device as claimed in claim 9, which is characterized in that the control device includes:
Obtain module, the activation user for obtaining module and being used to obtain the radio communication base station service of the current time slots
Set.
11. control device as claimed in claim 9, which is characterized in that first estimation module includes:
Transmission module, the transmission module is for pilot signal described in the transmission using the current time slots to obtain second
Receive signal；
First computing module, the channel that first computing module is used to receive signal and the passing time slot using described second
Information obtains the information of the channel variation part of the current time slots；
Second computing module, information of second computing module for the channel variation part of current time slots described in Linear Estimation
To obtain the fading coefficients of the channel variation part of the current time slots；And
Third computing module, the third computing module are used to reconstruct using the channel information of passing time slot and the fading coefficients
The channel information of current time slots out.
12. a kind of base station system, characterized by comprising:
Radio communication base station；And
Control device as claimed in claim 9.
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