CN104467939A - Method and device for optimizing receiving of multiple antennas - Google Patents
Method and device for optimizing receiving of multiple antennas Download PDFInfo
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- CN104467939A CN104467939A CN201410820381.8A CN201410820381A CN104467939A CN 104467939 A CN104467939 A CN 104467939A CN 201410820381 A CN201410820381 A CN 201410820381A CN 104467939 A CN104467939 A CN 104467939A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
- H04B7/0828—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with delay elements in antenna paths
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Abstract
The embodiment of the invention provides a method and device for optimizing receiving of multiple antennas. The method comprises the steps that when the multiple antennas receive data, the time delay estimation value of each antenna to receive data is determined; time delay compensation is carried out on the data received by the antennas according to the corresponding time delay estimation values; the data which are obtained after time delay compensation is performed and received by the antennas are combined. The method and device for optimizing receiving of the multiple antennas can eliminate time delay difference between the data received by the multiple antennas, and the performance of a multi-antenna receiver is improved.
Description
Technical field
The present invention relates to antenna technical field, be specifically related to a kind of method and the device of optimizing multiple antennas reception.
Background technology
Along with the development of the communication technology, the communication system adopting multiple antennas to receive data is widely used, as SIMO (Single Input Multiple Out, single-input multiple output) system etc., the receiver of these communication systems adopts multiple antennas to receive the data of transmitter transmission, and after the data received carry out data merging between antenna, then the data after being combined are for data processing, reduction data processing amount can be reached, improve the advantage of data processing speed.
Due to the different antennae of multiple antennas, the data received are that same signal source is transmitted through different channels, and can there is time delay between the data that therefore different antennae receives, the difference in channel quality that this time delay receives data primarily of each antenna causes; And when the data received multiple antennas carry out data merging, if the time delay between the data that antenna receives is larger, the delay inequality of the data that different antennae receives can make the accuracy of the result after data merging lower, makes the result after data merging have a strong impact on the performance of multi-aerial receiver.
Visible, a kind of method optimized multiple antennas and receive is provided, to reduce the delay variation between data that multiple antennas receives, improve data merge after the accuracy of result, promote the performance of multi-aerial receiver, become the technical problem needing solution badly.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of and optimizes the method and device that multiple antennas receives, to reduce the delay variation between data that multiple antennas receives, improve data merge after the accuracy of result, promote the performance of multi-aerial receiver.
For achieving the above object, the embodiment of the present invention provides following technical scheme:
Optimize the method that multiple antennas receives, comprise
When multiple antennas receives data, determine that each antenna receives the time delay estimated value of data;
To the data that each antenna receives, carry out delay compensation according to corresponding time delay estimated value;
To the data of carrying out each antenna reception after delay compensation, carry out data merging.
Wherein, describedly determine that each antenna receives the time delay estimated value of data and comprises:
Determine that each antenna receives the channel estimation in frequency domain value of data;
Determine that each antenna receives the time domain channel estimated value corresponding to channel estimation in frequency domain value of data;
According to the cyclic shift value of setting and the time domain channel estimated value of each antenna reception data, receive in channel estimation window corresponding to data at each antenna and determine, the peak point position of the data that each antenna receives;
By the peak point position of the data that determined each antenna receives, be defined as the time delay estimated value that each antenna receives data.
Wherein, describedly determine that each antenna receives the channel estimation in frequency domain value of data and comprises:
For kth
aRroot antenna, determines in kth
aRon root antenna, the kth received
aVthe channel estimation in frequency domain value of N number of reception sampled point at the channel response place of root virtual-antenna
wherein, kth
aRroot antenna is any antenna in multiple antennas, described in
for kth
aRthe kth of root antenna
aVthe channel estimation in frequency domain value of root virtual-antenna;
Describedly determine that each antenna receives the time domain channel estimated value corresponding to channel estimation in frequency domain value of data and comprises:
For kth
aRroot antenna, to the channel estimation in frequency domain value determined
the IDFT making the length points corresponding with described N number of reception sampled point converts, and obtain corresponding time domain channel estimated value, the time domain channel estimated value obtained is kth
aRthe kth of root antenna
aVthe time domain channel estimated value of root virtual-antenna.
Wherein, the described data that each antenna is received, carry out delay compensation according to corresponding time delay estimated value and comprise:
For each antenna, if the peak point position of determined antenna received data, be positioned at the right side of corresponding channel estimation window, then determine the data delay that described antenna receives, the time domain data that the data received described antenna with described peak point position are corresponding, carries out delay compensation process;
For each antenna, if the peak point position of determined antenna received data, be positioned at the left side of corresponding channel estimation window, then determine that the data that described antenna receives are advanced, the time domain data that the data received described antenna with described peak point position are corresponding, carries out lead compensation process.
Wherein, described method also comprises:
For each antenna, if the peak point position of determined antenna received data, be positioned at the original position of corresponding channel estimation window, then determine that the data that described antenna receives do not have time delay, time domain data corresponding to the data do not received described antenna carries out delay compensation.
Wherein, the deterministic process of the time domain data that the data of described antenna reception are corresponding comprises:
AD conversion is carried out to the data that antenna receives, obtains numerical data;
Cyclic prefix CP is removed to described numerical data;
FFT conversion is carried out to the numerical data after removing CP;
Frequency domain data after being converted by FFT is converted to time domain data.
Wherein, describedly determine that each antenna receives the time delay estimated value of data and comprises:
Determine that the antenna needing to adjust time delay estimated value receives data, and do not need the antenna adjusting time delay estimated value to receive data;
Data are received to the determined antenna adjusting time delay estimated value that needs, carries out the estimation of current time delay estimated value;
Data are received to the determined antenna adjusting time delay estimated value that do not need, the time delay estimated value determined last time is as current time delay estimated value, the time delay estimated value determined of last time be this antenna reception data upper once adjust time delay estimated value time, estimated time delay estimated value.
Wherein, the described antenna reception data determining to need to adjust time delay estimated value comprise:
Timer is set, present channel quality is monitored simultaneously; If timer is not overtime, and the channel quality value of monitoring and the difference of the channel quality value stored, be greater than threshold value, then determine that the reception data of this antenna are need the antenna adjusting time delay estimated value to receive data; If timer expiry, then determine that the reception data of this antenna are need the antenna adjusting time delay estimated value to receive data;
The described antenna reception data determining not need to adjust time delay estimated value comprise:
If timer is not overtime, and the present channel quality value of the channel of monitoring and the difference of the channel quality value stored, be not more than threshold value, then determine that the reception data of this antenna are do not need the antenna adjusting time delay estimated value to receive data.
The embodiment of the present invention also provides a kind of device optimized multiple antennas and receive, and comprising:
Time delay determination module, for when multiple antennas receives data, determines that each antenna receives the time delay estimated value of data;
Delay compensation module, for the data received each antenna, carries out delay compensation according to corresponding time delay estimated value;
Data combiners block, for the data of carrying out each antenna reception after delay compensation, carries out data merging.
Wherein, described time delay determination module can comprise:
Frequency domain estimation unit, for determining that each antenna receives the channel estimation in frequency domain value of data;
Time domain estimation unit, for determining that each antenna receives the time domain channel estimated value corresponding to the channel estimation in frequency domain value of data;
Peak point determining unit, for according to the cyclic shift value of setting and the time domain channel estimated value of each antenna reception data, receives in channel estimation window corresponding to data at each antenna and determines, the peak point position of the data that each antenna receives;
Time delay result determining unit, for the peak point position of data received by determined each antenna, is defined as the time delay estimated value that each antenna receives data.
Based on technique scheme, the method that the optimization multiple antennas that the embodiment of the present invention provides receives, when multiple antennas receives data, the time delay estimated value of data is received by determined each antenna, the data that can receive each antenna carry out delay compensation, the data that each antenna is received are in synchronous regime substantially, delay variation between the data that reduction multiple antennas receives, in the follow-up data received each antenna after delay compensation, when carrying out data merging treatment, the accuracy of the result after data can be made to merge is higher, promote the performance of multi-aerial receiver.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
The flow chart of the method that the optimization multiple antennas that Fig. 1 provides for the embodiment of the present invention receives;
The schematic diagram of the optimization multi-antenna receiving method that Fig. 2 provides for the embodiment of the present invention;
A kind of method flow diagram determining the time delay estimated value of each antenna reception data that Fig. 3 provides for the embodiment of the present invention;
The other method flow chart that the optimization multiple antennas that Fig. 4 provides for the embodiment of the present invention receives;
Another schematic diagram of the optimization multi-antenna receiving method that Fig. 5 provides for the embodiment of the present invention;
The method flow diagram again that the optimization multiple antennas that Fig. 6 provides for the embodiment of the present invention receives;
The structured flowchart of the device that the optimization multiple antennas that Fig. 7 provides for the embodiment of the present invention receives;
The structured flowchart of the time delay determination module that Fig. 8 provides for the embodiment of the present invention;
The structured flowchart of the frequency domain estimation unit that Fig. 9 provides for the embodiment of the present invention;
The structured flowchart of the time domain estimation unit that Figure 10 provides for the embodiment of the present invention;
The structured flowchart of the delay compensation module that Figure 11 provides for the embodiment of the present invention;
Another structured flowchart of the device that the optimization multiple antennas that Figure 12 provides for the embodiment of the present invention receives;
The structured flowchart of the time delay determination module that Figure 13 provides for the embodiment of the present invention;
The structured flowchart of the adjustment determining unit that Figure 14 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The flow chart of the method that the optimization multiple antennas that Fig. 1 provides for the embodiment of the present invention receives, the method can be applicable to the equipment with multiple antennas, comprise network equipment (as base station etc.) and user side equipment (as mobile phone etc.), with reference to Fig. 1, the method can comprise:
Step S100, when multiple antennas receives data, determine that each antenna receives the time delay estimated value of data;
In multiple antennas, each antenna receives the time delay difference of data, and by determining that each antenna receives the time delay estimated value of data, the data that can receive each antenna do time domain compensation process;
Optionally, the time domain data of the data that each antenna can be received by respective channels by the embodiment of the present invention, the peak point position in the channel estimation window of correspondence, is defined as the time delay estimated value that each antenna receives data;
Have antenna 1 ~ antenna M with multiple antennas, M root antenna is example altogether, and antenna i is an antenna wherein, and the embodiment of the present invention can determine that antenna i receives the time delay estimated value of data; By calculating the peak point position of data in the channel estimation window of correspondence that antenna i receives, can determine that antenna i receives the time delay estimated value of data; Process as antenna i is all done to this M root antenna, the time delay estimated value that each antenna receives data can be obtained.
Step S110, the data received each antenna, carry out delay compensation according to corresponding time delay estimated value;
After the time delay estimated value determining each antenna reception data, the embodiment of the present invention receives the time delay estimated value of data by each antenna, carries out delay compensation to the data that each antenna receives; As after the time delay estimated value determining antenna i reception data, the data that the embodiment of the present invention can receive antenna i, time delay estimated value according to antenna i carries out delay compensation, all by corresponding time delay estimated value, delay compensation is carried out to the data that M root antenna receives, the data that M root antenna then can be made to receive are in synchronous regime, the delay variation between the data that elimination multiple antennas receives;
Optionally, the time delay state of antenna reception data is mainly divided into two kinds: postpone with advanced; When receiving data delay, the time of the data that antenna receives will be more late than lock in time, and to this, the embodiment of the present invention by the time domain data of received data, can deduct corresponding time delay estimated value, realize the reception data syn-chronization of Delay time; When receiving data and being advanced, time of data that antenna receives will be more Zao than lock in time, and to this, the embodiment of the present invention by the time domain data of received data, can add the time delay estimated value of correspondence, realize channel advanced time reception data syn-chronization.Optionally, lock in time can be corresponding to the original position of channel estimation window.
Step S120, to the data of carrying out each antenna after delay compensation and receiving, carry out data merging.
For ease of understanding, Fig. 2 shows the schematic diagram optimizing multi-antenna receiving method, with reference to Fig. 2, the data that each antenna receives, time delay estimated value by correspondence carries out delay compensation, complete after each antenna receives the time delay adjustment of data carrying out delay compensation, then merging treatment is carried out to the data that each antenna receives.
Can find out, the method that the optimization multiple antennas that the embodiment of the present invention provides receives, when multiple antennas receives data, the time delay estimated value of data is received by determined each antenna, the data that can receive each antenna carry out delay compensation, the data that each antenna is received are in synchronous regime, delay variation between the data that elimination multiple antennas receives, in the follow-up data received each antenna after delay compensation, when carrying out data merging treatment, the accuracy of the result after data can be made to merge is higher, promotes the performance of multi-aerial receiver.
Fig. 3 shows a kind of method determining the time delay estimated value of each antenna reception data that the embodiment of the present invention provides, and with reference to Fig. 3, the method can comprise:
Step S200, determine that each antenna receives the channel estimation in frequency domain value of data;
With the kth of multiple antennas
aRroot antenna is example, kth
aRroot antenna passes through kth
aVroot virtual-antenna receives data, then the embodiment of the present invention can be determined in kth
aRon root antenna, the kth received
aVthe channel estimation in frequency domain value of N number of reception sampled point at the channel response place of root virtual-antenna
this determined channel estimation in frequency domain value
be kth
aRthe kth of root antenna
aVthe channel estimation in frequency domain value of the channel of root virtual-antenna, wherein, N number of reception sampled point passes through kth
aVthe sampled point of the channel received data of root virtual-antenna;
Step S210, determine that each antenna receives the time domain channel estimated value corresponding to channel estimation in frequency domain value of data;
Optionally, with kth
aRroot antenna is example, and the embodiment of the present invention can to the channel estimation in frequency domain value determined
the IDFT (Inverse Discrete FourierTransform, inverse discrete Fourier transform) making the length points corresponding with described N number of reception sampled point converts, namely
thus obtain kth
aRthe kth of root antenna
aVthe time domain channel estimated value of the channel of root virtual-antenna.
Step S220, receive the time domain channel estimated value of data according to the cyclic shift value of setting and each antenna, receive in channel estimation window corresponding to data at each antenna and determine, the peak point position of the data that each antenna receives;
Wherein, cyclic shift value is the given value of setting, but this cyclic shift value can change with actual service condition; With kth
aRroot antenna is example, and the embodiment of the present invention can according to the cyclic shift value of setting, kth
aRthe kth of root antenna
aVroot virtual-antenna receives the time domain channel estimated value of data
in kth
aRthe kth of root antenna
aVroot virtual-antenna receives in channel estimation window corresponding to data to be determined, kth
aRthe peak point position of the response data of N number of point that root antenna receives;
Step S230, the peak point position of data received by determined each antenna, be defined as the time delay estimated value that each antenna receives data.
Optionally, peak point position may be positioned at the right side of corresponding channel estimation window, corresponding reception data delay, and the data existence that namely antenna receives postpones; Peak point position may be positioned at the left side of corresponding channel estimation window, and corresponding reception data are advanced, and the data that namely antenna receives exist advanced; Peak point position may be positioned at the original position of corresponding channel estimation window, represents that the reception data on this antenna do not exist time delay (not postponing yet not advanced).
Optionally, there is Delay time, the time domain data that can will receive, deducts corresponding time delay estimated value; When channel is advanced, the time domain data that can will receive, adds corresponding time delay estimated value, thus realizes delay compensation.The other method flow chart that the optimization multiple antennas that Fig. 4 shows the embodiment of the present invention to be provided receives, with reference to Fig. 4, the method can comprise:
Step S300, when multiple antennas receives data, determine that each antenna receives the channel estimation in frequency domain value of data;
Step S310, determine that each antenna receives the time domain channel estimated value corresponding to channel estimation in frequency domain value of data;
Step S320, receive the time domain channel estimated value of data according to the cyclic shift value of setting and each antenna, receive in channel estimation window corresponding to data at each antenna and determine, the peak point position of the data that each antenna receives;
Step S330, the peak point position of data received by determined each antenna, be defined as the time delay estimated value that each antenna receives data;
Step S340, for each antenna, if the peak point position of determined antenna received data, be positioned at the right side of corresponding channel estimation window, then determine the data delay that described antenna receives, the time domain data that the data received described antenna with described peak point position are corresponding, carries out delay compensation process;
Optionally, the time domain data of the data that antenna can be received, deducts corresponding time delay estimated value; What this time domain data represented is after antenna receives data, after reception data being carried out to a series of process such as AD (modulus) conversion, removal CP (Cyclic Prefix, Cyclic Prefix), and the time domain data changed.
As kth
aRroot antenna is in kth
aVthe peak point position of the response data of N number of point that the channel of root virtual-antenna receives is positioned at the right side of channel estimation window, then can determine kth
aRthe kth of root antenna
aVroot virtual-antenna receives the delay of data and to count k=n_delay, for from kth
aRthe kth of root antenna
aVthe data that root virtual-antenna receives, after converting, be converted to the time domain data e (ts) of corresponding length through A/D conversion, removal CP, FFT, the mode by e (ts) '=e (ts-k) carries out delay compensation process to time domain data e (ts).
Step S350, for each antenna, if the peak point position of determined antenna received data, be positioned at the left side of corresponding channel estimation window, then determine that the data that described antenna receives are advanced, the time domain data that the data received described antenna with described peak point position are corresponding, carries out lead compensation process;
Optionally, the time domain data that antenna can be received, adds the time delay estimated value of respective channels; What this time domain data represented is after antenna passes through corresponding channel received data, after a series of process such as A/D conversion, removal CP is carried out to reception data, and the time domain data changed.
As kth
aRroot antenna is in kth
aVthe peak point position of the response data of N number of point that the channel of root virtual-antenna receives is positioned at the left side of channel estimation window, then can determine kth
aRthe kth of root antenna
aVroot virtual-antenna receives the k=-n_delay that counts in advance of data, for from kth
aRthe kth of root antenna
aVthe data that root virtual-antenna receives, after converting, be converted to the time domain data e (ts) of corresponding length through A/D conversion, removal CP, FFT, the mode by e (ts) '=e (ts-k) carries out lead compensation process to time domain data e (ts).
Optionally, the peak point position of determined antenna received data, also likely be positioned at the corresponding original position receiving the channel estimation window of data, for this kind of situation, the embodiment of the present invention can determine that the data that described antenna receives do not have time delay, and time domain data corresponding to the data do not received described antenna carries out delay compensation.
Step S360, to the data of carrying out each antenna after delay compensation and receiving, carry out data merging.
For ease of understanding, Fig. 5 shows another schematic diagram optimizing multi-antenna receiving method, and the data that each antenna receives can carry out AD conversion, obtain numerical data, remove CP to described numerical data, carry out FFT conversion to the numerical data after removing CP, the data after being converted by FFT are converted to time domain data; The time domain data that the data that described antenna receives are corresponding, according to the delay received corresponding to data, advanced or do not have case propagation delays, can carry out delay compensation process, lead compensation process or do not carry out delay compensation; Follow-up again to carrying out delay compensation process, the time domain data that the data that lead compensation process or each antenna not carrying out delay compensation receive are corresponding, carries out data merging.
Further, if when each multiple antennas receives data, all the reception data of all antennas are carried out to the estimation of time delay estimated value, carry out delay compensation again, then processing delay increases, also the receptivity of receiver can be affected, therefore the present invention can determine that the antenna needing to adjust time delay estimated value receives data, the antenna adjusting time delay estimated value is not needed to receive data, when each multiple antennas receives data, only to needing the antenna adjusting time delay estimated value to receive the estimation that data carry out time delay estimated value, to the time delay estimated value not needing the antenna reception data adjusting time delay estimated value then to use the last time to determine.
Optionally, the method flow diagram again that the optimization multiple antennas that Fig. 6 shows the embodiment of the present invention to be provided receives, with reference to Fig. 6, the method can comprise:
Step S400, when multiple antennas receives data, determine to need the antenna adjusting time delay estimated value to receive data, and do not need the antenna adjusting time delay estimated value to receive data;
Optionally, the embodiment of the present invention can arrange timer, and supervisory channel changes, the measurement result of the pilot signal of more current reception simultaneously and the pilot signal measurement result of storage; If timer is not overtime, and the pilot signal measurement result of the measurement result of pilot signal and storage, the two difference is greater than an amount delta given in advance, then think that channel variation is larger; If timer is not overtime, and the difference of the two is less than an amount delta given in advance, then think that channel variation is less; If timer expiry, then think that channel variation is larger.
If current monitor channel quality change is less, then not thinks and need adjustment delay compensation amount, namely do not need to carry out time delay estimation, directly utilize the time delay estimated value of current preservation to compensate to received signal; Otherwise need to carry out time delay estimation, and store new time delay estimated value, compensate to received signal by new time delay estimated value, restart channel monitoring timer simultaneously.
Concrete, receiver, by the monitoring of its symmetric channel (such as, base station side need consider up channel, and end side need consider down channel) quality, is adjudicated each antenna and is received data the need of adjustment time delay estimated value; To the monitoring of channel quality, by a timer, the signal quality that the channel of more current reception simultaneously transmits, the signal quality corresponding with this channel stored; If timer is not overtime, and the difference of the two (signal quality that the channel of current reception transmits, the difference of the signal quality corresponding with this channel stored) be greater than an amount delta given in advance, then think that this channel variation is comparatively large, that need carry out time delay estimated value reappraises adjustment; If timer is not overtime, and the difference of the two is less than an amount delta given in advance, then think that this channel variation is less, and what do not need to carry out time delay estimated value reappraises adjustment; If timer expiry, then think that channel variation is comparatively large, that need carry out time delay estimated value reappraises adjustment;
Step S410, data are received to the determined antenna adjusting time delay estimated value that needs, carrying out the estimation of time delay estimated value, to not needing the antenna adjusting time delay estimated value to receive data, using the last time delay estimated value estimated as current time delay estimated value;
If the change of the channel of current monitoring is less, then not think and need adjustment time delay estimated value, namely do not need to carry out time delay estimation, the time delay estimated value (during last adjustment time delay estimated value determined time delay estimated value) directly utilizing the last time of current preservation to determine compensates reception data; Otherwise need the estimation carrying out time delay estimated value, and store new estimated time delay estimated value, by new time delay estimated value, reception data are compensated, restart the timer of supervisory channel simultaneously.
Optionally, the estimation mode receiving the time delay estimated value of data can be as shown in Figure 3.
Optionally, step S400 and S410 when multiple antennas receives data, can perform in real time, to determine that the antenna needing to adjust time delay estimated value receives data in time, thus ensures the accuracy of follow-up delay compensation.
Step S420, the data received each antenna, carry out delay compensation according to corresponding time delay estimated value;
Step S430, to the data of carrying out each antenna after delay compensation and receiving, carry out data merging.
The present invention is by carrying out delay compensation to the data that each antenna receives, the data that each antenna is received are in synchronous regime, delay variation between the data that elimination multiple antennas receives, in the follow-up data received each antenna after delay compensation, when carrying out data merging treatment, the accuracy of the result after data can be made to merge is higher, promotes the performance of multi-aerial receiver.
The device that the optimization multiple antennas provided the embodiment of the present invention below receives is introduced, the mutual corresponding reference of method that the device that optimization multiple antennas described below receives can receive with above-described optimization multiple antennas.
The structured flowchart of the device that the optimization multiple antennas that Fig. 7 provides for the embodiment of the present invention receives, this device can be applicable to the equipment with multiple antennas, comprise network equipment (as base station etc.) and user side equipment (as mobile phone etc.), with reference to Fig. 7, this device can comprise:
Time delay determination module 100, for when multiple antennas receives data, determines that each antenna receives the time delay estimated value of data;
Delay compensation module 200, for the data received each antenna, carries out delay compensation according to corresponding time delay estimated value;
Data combiners block 300, for the data of carrying out each antenna reception after delay compensation, carries out data merging.
Optionally, Fig. 8 shows a kind of alternate configurations of the time delay determination module 100 that the embodiment of the present invention provides, and with reference to Fig. 8, time delay determination module 100 can comprise:
Frequency domain estimation unit 110, for determining that each antenna receives the channel estimation in frequency domain value of data;
Time domain estimation unit 111, for determining that each antenna receives the time domain channel estimated value corresponding to the channel estimation in frequency domain value of data;
Peak point determining unit 112, for according to the cyclic shift value of setting and the time domain channel estimated value of each antenna reception data, receives in channel estimation window corresponding to data at each antenna and determines, the peak point position of the data that each antenna receives;
Time delay result determining unit 113, for the peak point position of data received by determined each antenna, is defined as the time delay estimated value that each antenna receives data.
Optionally, Fig. 9 shows a kind of alternate configurations of the frequency domain estimation unit 110 that the embodiment of the present invention provides, and with reference to Fig. 9, frequency domain estimation unit 110 can comprise:
Frequency domain is estimated to perform subelement 1101, for for kth
aRroot antenna, determines in kth
aRon root antenna, the kth received
aVthe channel estimation in frequency domain value of N number of reception sampled point at the channel response place of root virtual-antenna
wherein, kth
aRroot antenna is any antenna in multiple antennas, described in
for kth
aRthe kth of root antenna
aVthe channel estimation in frequency domain value of root virtual-antenna.
Optionally, Figure 10 shows a kind of alternate configurations of the time domain estimation unit 120 that the embodiment of the present invention provides, and with reference to Figure 10, time domain estimation unit 111 can comprise:
Time domain is estimated to perform subelement 1111, for for kth
aRroot antenna, to the channel estimation in frequency domain value determined
the IDFT making the length points corresponding with described N number of reception sampled point converts, and obtain corresponding time domain channel estimated value, the time domain channel estimated value obtained is kth
aRthe kth of root antenna
aVthe time domain channel estimated value of root virtual-antenna.
Optionally, Figure 11 shows a kind of alternate configurations of the delay compensation module 200 that the embodiment of the present invention provides, and with reference to Figure 11, delay compensation module 200 can comprise:
Delay compensation unit 210, for for each antenna, if the peak point position of determined antenna received data, be positioned at the right side of corresponding channel estimation window, then determine the data delay that described antenna receives, the time domain data that the data received described antenna with described peak point position are corresponding, carries out delay compensation process;
Lead compensation unit 220, for for each antenna, if the peak point position of determined antenna received data, be positioned at the left side of corresponding channel estimation window, then determine that the data that described antenna receives are advanced, the time domain data that the data received described antenna with described peak point position are corresponding, carries out lead compensation process.
Optionally, delay compensation module 200 can also be used for, for each antenna, if the peak point position of determined antenna received data, be positioned at the original position of corresponding channel estimation window, then determine that the data that described antenna receives do not have time delay, time domain data corresponding to the data do not received described antenna carries out delay compensation.
Optionally, another structured flowchart of the device that the optimization multiple antennas that Figure 12 shows the embodiment of the present invention to be provided receives, shown in composition graphs 7 and Figure 12, this device can also comprise:
Time domain data determination module 400, carries out AD conversion for the data received antenna, obtains numerical data, removes CP to described numerical data, carries out FFT conversion to the numerical data after removing CP, and the frequency domain data after being converted by FFT is converted to time domain data.
Optionally, Figure 13 shows the another kind of alternate configurations of the time delay determination module 100 that the embodiment of the present invention provides, and with reference to Figure 13, time delay determination module 100 can comprise:
Adjustment determining unit 120, for determining that the antenna needing to adjust time delay estimated value receives data, and does not need the antenna adjusting time delay estimated value to receive data;
First time delay determining unit 121, for receiving data to the determined antenna adjusting time delay estimated value that needs, carries out the estimation of current time delay estimated value;
Second time delay determining unit 122, for receiving data to the determined antenna adjusting time delay estimated value that do not need, the time delay estimated value determined last time is as current time delay estimated value, the time delay estimated value determined of last time be this antenna reception data upper once adjust time delay estimated value time, estimated time delay estimated value.
Optionally, Figure 14 shows a kind of alternate configurations of the adjustment determining unit 120 that the embodiment of the present invention provides, and with reference to Figure 14, adjustment determining unit 120 can comprise:
Monitoring subelement 1201, for arranging timer, monitors present channel quality simultaneously;
Need adjust and determine subelement 1202, if not overtime for timer, and the channel quality value of monitoring and the difference of the channel quality value stored, be greater than threshold value, then determine that the reception data of this antenna are need the antenna adjusting time delay estimated value to receive data; If timer expiry, then determine that the reception data of this antenna are need the antenna adjusting time delay estimated value to receive data;
Adjustment is not needed to determine subelement 1203, if not overtime for timer, and the channel quality value of monitoring and the difference of the channel quality value stored, be not more than threshold value, then determine that the reception data of this antenna are do not need the antenna adjusting time delay estimated value to receive data.
The embodiment of the present invention also provides a kind of electronic equipment, this electronic equipment can comprise the device that optimization multiple antennas described above receives, this electronic equipment has multiple antennas, can be network equipment (as base station) or user side equipment (as mobile phone etc.); This electronic equipment can when multiple antennas receives data, determine that each antenna receives the time delay estimated value of data, to the data that each antenna receives, carry out delay compensation according to corresponding time delay estimated value, to the data of carrying out each antenna reception after delay compensation, carry out data merging; Thus the data making each antenna receive are in synchronous regime, delay variation between the data that elimination multiple antennas receives, in the follow-up data received each antenna after delay compensation, when carrying out data merging treatment, the accuracy of the result after data can be made to merge is higher, promotes the performance that multiple antennas receives.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.For device disclosed in embodiment, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part illustrates see method part.
Professional can also recognize further, in conjunction with unit and the algorithm steps of each example of embodiment disclosed herein description, can realize with electronic hardware, computer software or the combination of the two, in order to the interchangeability of hardware and software is clearly described, generally describe composition and the step of each example in the above description according to function.These functions perform with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can use distinct methods to realize described function to each specifically should being used for, but this realization should not thought and exceeds scope of the present invention.
The software module that the method described in conjunction with embodiment disclosed herein or the step of algorithm can directly use hardware, processor to perform, or the combination of the two is implemented.Software module can be placed in the storage medium of other form any known in random asccess memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. optimize the method that multiple antennas receives, it is characterized in that, comprise
When multiple antennas receives data, determine that each antenna receives the time delay estimated value of data;
To the data that each antenna receives, carry out delay compensation according to corresponding time delay estimated value;
To the data of carrying out each antenna reception after delay compensation, carry out data merging.
2. the method that receives of optimization multiple antennas according to claim 1, is characterized in that, the described time delay estimated value determining that each antenna receives data comprises:
Determine that each antenna receives the channel estimation in frequency domain value of data;
Determine that each antenna receives the time domain channel estimated value corresponding to channel estimation in frequency domain value of data;
According to the cyclic shift value of setting and the time domain channel estimated value of each antenna reception data, receive in channel estimation window corresponding to data at each antenna and determine, the peak point position of the data that each antenna receives;
By the peak point position of the data that determined each antenna receives, be defined as the time delay estimated value of the reception data of each antenna.
3. the method that receives of optimization multiple antennas according to claim 2, is characterized in that, the described channel estimation in frequency domain value determining that each antenna receives data comprises:
For kth
aRroot antenna, determines in kth
aRon root antenna, the kth received
aVthe channel estimation in frequency domain value of N number of reception sampled point at the channel response place of root virtual-antenna
wherein, kth
aRroot antenna is any antenna in multiple antennas, described in
for kth
aRthe kth of root antenna
aVthe channel estimation in frequency domain value of root virtual-antenna;
Describedly determine that each antenna receives the time domain channel estimated value corresponding to channel estimation in frequency domain value of data and comprises:
For kth
aRroot antenna, to the channel estimation in frequency domain value determined
the IDFT making the length points corresponding with described N number of reception sampled point converts, and obtain corresponding time domain channel estimated value, the time domain channel estimated value obtained is kth
aRthe kth of root antenna
aVthe time domain channel estimated value of root virtual-antenna.
4. the method that the optimization multiple antennas according to Claims 2 or 3 receives, is characterized in that, the described data received each antenna, carries out delay compensation comprise according to corresponding time delay estimated value:
For each antenna, if the peak point position of determined antenna received data, be positioned at the right side of corresponding channel estimation window, then determine the data delay that described antenna receives, the time domain data that the data received described antenna with described peak point position are corresponding, carries out delay compensation process;
For each antenna, if the peak point position of determined antenna received data, be positioned at the left side of corresponding channel estimation window, then determine that the data that described antenna receives are advanced, the time domain data that the data received described antenna with described peak point position are corresponding, carries out lead compensation process.
5. the method for optimization multiple antennas reception according to claim 4, is characterized in that, also comprise:
For each antenna, if the peak point position of determined antenna received data, be positioned at the original position of corresponding channel estimation window, then determine that the data that described antenna receives do not have time delay, time domain data corresponding to the data do not received described antenna carries out delay compensation.
6. the method for optimization multiple antennas reception according to claim 4, is characterized in that, the deterministic process of the time domain data that the data that described antenna receives are corresponding comprises:
AD conversion is carried out to the data that antenna receives, obtains numerical data;
Cyclic prefix CP is removed to described numerical data;
FFT conversion is carried out to the numerical data after removing CP;
Frequency domain data after being converted by FFT is converted to time domain data.
7. the method that receives of optimization multiple antennas according to claim 1, is characterized in that, the described time delay estimated value determining that each antenna receives data comprises:
Determine that the antenna needing to adjust time delay estimated value receives data, and do not need the antenna adjusting time delay estimated value to receive data;
Data are received to the determined antenna adjusting time delay estimated value that needs, carries out the estimation of current time delay estimated value;
Data are received to the determined antenna adjusting time delay estimated value that do not need, the time delay estimated value determined last time is as current time delay estimated value, the time delay estimated value determined of last time be this antenna reception data upper once adjust time delay estimated value time, estimated time delay estimated value.
8. the method for optimization multiple antennas reception according to claim 7, is characterized in that, the described antenna reception data determining to need to adjust time delay estimated value comprise:
Timer is set, present channel quality is monitored simultaneously; If timer is not overtime, and the channel quality value of monitoring and the difference of the channel quality value stored, be greater than threshold value, then determine that the reception data of this antenna are need the antenna adjusting time delay estimated value to receive data; If timer expiry, then determine that the reception data of this antenna are need the antenna adjusting time delay estimated value to receive data;
The described antenna reception data determining not need to adjust time delay estimated value comprise:
If timer is not overtime, and the present channel quality value of monitoring and the difference of the channel quality value stored, be not more than threshold value, then determine that the reception data of this antenna are do not need the antenna adjusting time delay estimated value to receive data.
9. optimize the device that multiple antennas receives, it is characterized in that, comprising:
Time delay determination module, for when multiple antennas receives data, determines that each antenna receives the time delay estimated value of data;
Delay compensation module, for the data received each antenna, carries out delay compensation according to corresponding time delay estimated value;
Data combiners block, for the data of carrying out each antenna reception after delay compensation, carries out data merging.
10. the device of optimization multiple antennas reception according to claim 9, it is characterized in that, described time delay determination module can comprise:
Frequency domain estimation unit, for determining that each antenna receives the channel estimation in frequency domain value of data;
Time domain estimation unit, for determining that each antenna receives the time domain channel estimated value corresponding to the channel estimation in frequency domain value of data;
Peak point determining unit, for according to the cyclic shift value of setting and the time domain channel estimated value of each antenna reception data, receives in channel estimation window corresponding to data at each antenna and determines, the peak point position of the data that each antenna receives;
Time delay result determining unit, for the peak point position of data received by determined each antenna, is defined as the time delay estimated value that each antenna receives data.
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