Method and device of estimating space arrival direction
Method and device of estimating space arrival direction
 CN 101,119,147 A
 Filed: 08/01/2006
 Published: 02/06/2008
 Est. Priority Date: 08/01/2006
 Status: Active Grant
First Claim
1. the method for estimation of a space arrival direction is applied to adopt the wireless communication system of intelligent antenna technology, it is characterized in that:
 The ascending time slot that a calibration cycle comprises is set earlier counts M and update cycle T, a time slot comprises one or more update cycle T, after startup space arrival direction DOA estimates, the update cycle in the ascending time slot in each calibration cycle and each ascending time slot is counted;
Based on abovementioned count value, in first update cycle of each first time slot of calibration cycle, adopt the maximum power value searching algorithm to find the solution the DOA estimated value, estimate initial value or corrected value as DOA;
At this calibration cycle At All Other Times, adopt the optimal demodulation signal to differentiate algorithm and find the solution the DOA estimated value, estimate to realize tracking on initial value or the corrected value basis the DOA estimated value at DOA.
Chinese PRB Reexamination
Abstract
The present invention discloses an estimation method and device of space arrival direction used in wireless communication system which applies the technique of intelligent antenna; an uplink time slot M and a renewal cycle T included in the calibration cycle are set; a time slot comprises one or more than one renewal cycle T; when the DOA estimation of space arrival direction is started, the counting unit calculates the uplink time slot in the calibration cycle and the renewal cycle in every uplink time slot; the calculation is carried out by a controller, based on the above calculating value, in the first renewal cycle of the first time slot of every calibration cycle, activating the searching machine of maximum power value to work out the DOA calibration value which is considered as the primary value or calibration value of DOA calibration; in other time of the calibration cycle, activating the arbiter of optimal demodulation signal to work out the DOA calibration value, realizing the follow of the DOA calibration value; the selector of DOA output value chooses the final DOA calibration value. The invention can lessen the complicated matrix manipulation, providing a much precise DOA calibration value.

9 Citations
A kind of 360 degrees omnidirection dynamic directionfinding method based on continuous quantum dove group  
Patent #
CN 108,663,654 A
Filed 06/26/2018

Current Assignee

Beamhopping synchronous method on a kind of star of serviceoriented information transparency forwarding  
Patent #
CN 107,769,837 A
Filed 09/22/2017

Current Assignee

Method and device for antenna calibration  
Patent #
US 8,818,291 B2
Filed 01/31/2011

Current Assignee
N/A

Beam forming method and beam forming device  
Patent #
CN 103,281,110 A
Filed 04/26/2013

Current Assignee

Method, device and system for processing beam searching  
Patent #
CN 102,164,374 A
Filed 05/10/2011

Current Assignee

METHOD AND DEVICE FOR ANTENNA CALIBRATION  
Patent #
WO2011095063A1
Filed 01/31/2011

Current Assignee

Beamforming method and user equipment  
Patent #
CN 104,023,344 A
Filed 05/21/2014

Current Assignee

Hardware realization method for updating equivalent historical current source information of smallstep system  
Patent #
CN 104,573,164 A
Filed 07/07/2014

Current Assignee

Method and base station for determining user incoming wave direction in dualpolarized array system  
Patent #
CN 102,075,226 A
Filed 11/24/2009

Current Assignee

No References
13 Claims

1. the method for estimation of a space arrival direction is applied to adopt the wireless communication system of intelligent antenna technology, it is characterized in that:

The ascending time slot that a calibration cycle comprises is set earlier counts M and update cycle T, a time slot comprises one or more update cycle T, after startup space arrival direction DOA estimates, the update cycle in the ascending time slot in each calibration cycle and each ascending time slot is counted; Based on abovementioned count value, in first update cycle of each first time slot of calibration cycle, adopt the maximum power value searching algorithm to find the solution the DOA estimated value, estimate initial value or corrected value as DOA;
At this calibration cycle At All Other Times, adopt the optimal demodulation signal to differentiate algorithm and find the solution the DOA estimated value, estimate to realize tracking on initial value or the corrected value basis the DOA estimated value at DOA.


2. the method for claim 1 is characterized in that, described M value is 30≤
 M≤
60.
 M≤

3. the method for claim 1 is characterized in that, when adopting the maximum power value searching algorithm to find the solution the DOA estimated value, adopts the multipass decoding method, promptly for the first time with equal angles interval A _{1}Calculate N in the angle choosing value interval _{1}The performance number of individual point is found the solution this N _{1}Maximum in the individual performance number;
 For the second time with N _{1}The angle of power maximum of points correspondence is the center in the individual point, respectively with less than A _{1}Equal angles A at interval _{2}Calculate each N about it _{2}The performance number of individual point is found the solution this 2N _{2}Maximum in the performance number of individual performance number and this central point;
Repeatedly search according to this, up to reaching the search precision requirement, the angle of last resulting power maximum correspondence is the DOA estimated value of being found the solution.
 For the second time with N _{1}The angle of power maximum of points correspondence is the center in the individual point, respectively with less than A _{1}Equal angles A at interval _{2}Calculate each N about it _{2}The performance number of individual point is found the solution this 2N _{2}Maximum in the performance number of individual performance number and this central point;

4. the method for claim 1 is characterized in that, also is provided with an initial step length value, when adopting optimal demodulation signal differentiation algorithm to find the solution the DOA estimated value, carries out the computing of following steps in each time slot:

(a) in each update cycle of this time slot, utilize two of the initial value of DOA estimated value and initial step length value structures to receive weight vectors, the DOA estimated value that the initial value of this DOA estimated value was found the solution for a update cycle on this time slot or last last update cycle of a time slot; (b) calculate the reception result of this two weight vector in this update cycle; (c) determine the new DOA estimated value of this update cycle according to described reception result.


5. method as claimed in claim 4 is characterized in that, in the described step (a), the formula of constructing two reception weight vectors are as follows:
Formula is as follows;

6. method as claimed in claim 4 is characterized in that, the formula of described step (b) reception result of this two weight vector in the calculating update cycle is as follows:

7. method as claimed in claim 4 is characterized in that, described step (c) determines that according to described reception result the formula of new DOA estimated value is as follows:

8. the method for claim 1 is characterized in that, when the number of chips of update cycle T is set, makes each ascending time slot comprise 8 or 9 update cycle T.

9. method as claimed in claim 4 is characterized in that, also preserves the increment of nearest L time DOA estimated value, and (c) also comprises afterwards in described step:

Step (d) is preserved the increment of the new last relatively DOA estimated value of DOA estimated value, judges whether to have preserved L θ
_{Cur}, if, execution in step (e), otherwise return step (a);
Step (e) is judged L θ
of current storage _{Cur}Increment, as a continuous L θ
_{Cur}The symbol of increment all is a plus or minus, will increase step delta θ
;
If continuous L adjacent θ
_{Cur}The symbol of increment is contrary sign each other, reduces step delta θ
, otherwise keeps current steplength constant, returns step (a).


10. the estimation unit of a space arrival direction comprises counting unit, algorithm selection control, power maximum value search device, optimal demodulation signal arbiter and space arrival direction DOA output valve selector, wherein:

Described counting unit comprises time slot counter, is used for ascending time slot is counted, counting again behind every counting M time, and M value is a timeslot number that calibration cycle comprises that sets in advance;
The update cycle counter is used for the update cycle of each time slot is counted;
Time slot count value and update cycle count value output to described algorithm selection control and DOA output valve selector;Described algorithm selection control is used for all equaling at 0 o'"'"'clock in the time slot count value and the update cycle count value of input, activates power maximum value search device and finds the solution the DOA estimated value;
In other cases, activate optimal demodulation signal arbiter and find the solution the DOA estimated value;Described power maximum value search device is used for finding the solution the DOA estimated value by power maximum value search algorithm, estimates initial value or corrected value as DOA, outputs to described optimal demodulation signal arbiter and DOA output valve selector; Described optimal demodulation signal arbiter is used to adopt the optimal demodulation signal to differentiate algorithm and finds the solution the DOA estimated value and output to described DOA output valve selector, estimates to realize the tracking to the DOA estimated value on initial value or the corrected value basis at described DOA; Described DOA output valve selector is used for all equaling at 0 o'"'"'clock in the time slot count value and the update cycle count value of input, the DOA estimated value that power output maximum value search device obtains, in other cases, the DOA estimated value that output optimal demodulation signal arbiter obtains.


11. estimation unit as claimed in claim 10 is characterized in that, the M value in the described counting unit is set to 30≤
 M≤
60, and update cycle counter wherein is 8 or 9 in the maximum count value of a time slot.
 M≤

12. estimation unit as claimed in claim 10 is characterized in that, described power maximum value search device adopts the multipass decoding method to search for the angle of power maximum correspondence, the DOA estimated value of promptly being found the solution.

13. estimation unit as claimed in claim 10 is characterized in that, described optimal demodulation signal arbiter further comprises:

The weight vector structural unit is used for each update cycle at this time slot, utilizes the initial value of DOA estimated value and two of initial step length value structures to receive weight vector; The reception result computing unit is used to calculate the reception result of this two weight vector in this update cycle; DOA estimated value computing unit is used for determining according to described reception result the new DOA estimated value of this update cycle; Memory is used for preserving at most the increment of L the new last relatively DOA estimated value of DOA estimated value; The steplength regulon is used to judge L described increment of current storage, all is plus or minus as the symbol of a continuous L increment, will increase steplength;
If the symbol of continuous L adjacent increment is contrary sign each other, reduce steplength, otherwise keep current steplength constant.

Specification(s)