Download presentation

Presentation is loading. Please wait.

Published byDiana Stone Modified over 4 years ago

1
doc.: IEEE 802.11-13/1110r1 September 2013 Submission Beam codebook design scheme for IEEE802.11aj DU GuanglongSlide 1 Date: 2013-09-16 Presenter:

2
doc.: IEEE 802.11-13/1110r1 September 2013 Submission Author List DU GuanglongSlide 2

3
doc.: IEEE 802.11-13/1110r1 September 2013 Submission Abstract Introduction of beam codebook Proposed N-phase beam codebook design Conclusion Slide 3 DU Guanglong

4
doc.: IEEE 802.11-13/1110r1 September 2013 Submission Introduction of Beam codebook (1/5) For 60GHz communication, use of array antenna can get a high antenna gain and realize spatial reuse. Taking into consideration of implementation complexity, it is suitable to consider a beam- switching system or a phased-array for 60GHz communication. DU Guanglong Slide 4

5
doc.: IEEE 802.11-13/1110r1 September 2013 Submission Introduction of Beam codebook (2/5) System model A codebook is a matrix W where each column specifies the beam former vector or combiner vector to be used. The phase array has widely used in 60GHz millimeter communication. DU Guanglong Slide 5

6
doc.: IEEE 802.11-13/1110r1 September 2013 Submission Introduction of Beam codebook (3/5) The codebook beam vectors are given by the column vectors of the matrix shown in the following equation (K≥M) * Where m denotes the antenna index, k denotes the beam index, and M is the total number of antennas, K is the total number of beams. Function fix(x) returns the biggest integer smaller than or equal to its argument, and mod(x,y) is the modulo function and is defined as x– fix(x/y)×y. There are 4 phases (0°,±90°,180°) used in this codebook. The gain loss at the intersections of two adjacent beams is less than 1 dB when K≥2M * Slide 6 DU Guanglong Reference: * 1)Wang J, Lan Z, Pyo C, et al.. Beamforming codebook design and performance evaluation for millimeter-wave WPAN. Proc. of the IEEE Vehicular Technology Conference (VTC2009 Fall) 2)IEEE 802.15.3c technical specification (1)

7
doc.: IEEE 802.11-13/1110r1 September 2013 Submission Introduction of Beam codebook (4/5) Left figure: the 5 th and 12 th beam patterns when M=8, K=16. Right figure: all the 16 beam patterns when M=8, K=16. Slide 7 DU Guanglong

8
doc.: IEEE 802.11-13/1110r1 September 2013 Submission Introduction of Beam codebook (5/5) Summary of the beam codebook (1) in slide 6: –The codebook matrix consists of only 4 phases, and lacking flexibility; –Gain loss of main lobe will be increased with the increase of antenna elements; –The side lobe level is high; –The codebook can be used in 2-D array by use separable codebooks along the polar angle direction and azimuth angle direction. Slide 8 DU Guanglong

9
doc.: IEEE 802.11-13/1110r1 September 2013 Submission The Proposed N-phase beam codebook design (1/5) We extend the beam codebook further, and give the following equation: Here, m, k, M, K and functions fix(x), mod(x,y) is defined as before. N denotes the number of phases of the codebook, that is to say, this codebook is consists of N phases but not 4 phases – codebook (1) used by IEEE802.15.3c. N is a user-defined parameter, and the more phases of the codebook (N), the better of the performance. Slide 9 DU Guanglong (2)

10
doc.: IEEE 802.11-13/1110r1 September 2013 Submission The Proposed N-phase beam codebook design (2/5) Left figure: the 2 nd beam of codebook (1) with M=8, K=16 (red line), and the 2 nd beam of N-phase codebook with M=8, K=16, N=16 (blue line); Right figure: the 11 th beam of codebook (1) with M=8, K=16 (red line), and the 2 nd beam of N-phase codebook with M=8, K=16, N=16 (blue line); Slide 10 DU Guanglong

11
doc.: IEEE 802.11-13/1110r1 September 2013 Submission The Proposed N-phase beam codebook design (3/5) Left figure: all the 16 beam patterns of codebook (1) with M=8 and K=16; Right figure: all the 16 beam patterns of Proposed N-phase codebook with M=8, K=16 and N=8; Slide 11 DU Guanglong

12
doc.: IEEE 802.11-13/1110r1 September 2013 Submission The Proposed N-phase beam codebook design (4/5) For the parameter N, we have conclusions as: –N=4, the codebook is same as codebook (1) in slide 6; –Gain loss of main lobe and side lobe level will decreases with the increase of N; –When N≥K, the gain loss of main lobe and side lobe level are change little. DU Guanglong Slide 12 N-phase codebook’s max gain loss of main lobe with different N when M=8 N-phase codebook’s max gain loss of main lobe with different N when M=16

13
doc.: IEEE 802.11-13/1110r1 September 2013 Submission The Proposed N-phase beam codebook design (5/5) Some performance data for codebook (1) with M=8 and K=16 (here denoted by 3c), and N-phase codebook with M=8, K=16, N=8 (here denoted by 8-phase). –HPBW: half power beam width; SLL: side lobe level; G max : maximum gain of main lobe DU Guanglong Slide 13 IndexHPBWSLL (dB)G max (dB) 3c8-phase3c8-phase3c8-phase 054.6 o -12.8 9.03 127.2 o 29.6 o -7.2-11.28.258.87 219.4 o 20 o -6.7-12.88.389.03 316.8 o 16.6 o -9.0-11.28.188.87 415 o -12.8 9.03 513.6 o 14 o -7.2-11.28.258.87 613.2 o 13.4 o -6.7-12.88.379.03 713.2 o -9.0-11.28.188.87 813 o -12.8 9.03 913 o 13.2 o -7.2-11.28.258.87 1013.4 o -6.7-12.88.389.03 1114 o -8.9-11.28.188.87 1215 o -12.8 9.03 1316.8 o -7.2-11.28.258.87 1420.2 o 20 o -6.7-12.88.389.03 1529.6 o 32.4 o -9.0-11.28.188.87

14
doc.: IEEE 802.11-13/1110r1 September 2013 Submission Conclusion Proposed a N-phase codebook: –N-phase codebook consists of N phases, and N can be defined by user, which gives the codebook more flexibility; –N should be less than or equal to the number of beam patterns K; –The N-phase codebook can demonstrate a better performance than the codebook used in IEEE802.15.3c. The proposed N-phase codebook is an informative procedure to obtain a beam code book for vendor’s choice in their implementation. It can be considered to be included in the appendix DU Guanglong Slide 14

15
doc.: IEEE 802.11-13/1110r1 September 2013 Submission References [1] 11-09-0334-08-00ad-channel-models-for-60-ghz-wlan-systems; [2] 11-12-0682-00-cmmw-introduction-of-cmmw-par-and-5c; [3] 11-12-0140-09-cmmw-ieee-802-11-cmmw-sg-par; [4] 15-08-0361-00-003c-beamforming; Slide 15 DU Guanglong

16
doc.: IEEE 802.11-13/1110r1 September 2013 Submission Thank you ！ Slide 16 DU Guanglong

Similar presentations

© 2019 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google