AoD and AoA Estimation for TGac

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Presentation transcript:

AoD and AoA Estimation for TGac Name Affiliations Address Phone E-mail Byung-Jae Kwak ETRI 138 Gajeongno, Yuseong-gu, Daejeon, 305-700, Korea +82-42-860-6618 bjkwak@etri.re.kr Myung Don Kim +82-42-860-6178 mdkim@etri.re.kr Jae Joon Park +82-42-860-3958 jjpark@etri.re.kr Wonsop Kim +82-42-860-5302 topson@etri.re.kr Minho Cheong +82-42-860-5635 minho@etri.re.kr Hyun Kyu Chung +82-42-860-6140 hkchung@etri.re.kr Gregory Breit Qualcomm 5775 Morehouse Dr., San Diego, CA +1-858-651-3809 gbreit@qualcomm.com Byung-Jae Kwak, ETRI, et al.

Contents Introduction Measurement campaign How to generate 3D plots from measurement Measurement Site AoD and AoA estimation results Discussion Text proposal Byung-Jae Kwak, ETRI, et al.

Introduction TGac has been studying the AoD spectrum variation as a function of client location and orientation The TGac channel model addendum document still use “TBD” value for AoD range [1] This presentation describes the results of measurement performed at ETRI to show the AoD and AoA spectrum as a function of client location And proposes values for “TBD” [1] IEEE 802.11-09/0543r0, “Measured Channel Capacity and AoD Estimation for Multi-User MIMO Scenarios,” IEEE 802.11 #115, May 2009. Byung-Jae Kwak, ETRI, et al.

Measurement Campaign New antenna systems Circular array antenna systems Tx: 8 element circular array for 0o~360o AoD estimation Rx: 8 element circular array for 0o~360o AoA estimation 1 measurement site: 1st floor, Bldg. 7, ETRI 2 scenarios Tx at center Tx close to the wall 5 LOS & 5 NLOS client locations for each scenario Measured bandwidth: 100 MHz at 5.25 GHz Byung-Jae Kwak, ETRI, et al.

Phase Shift by AoD and AoA Byung-Jae Kwak, ETRI, et al.

3D-plot Generation Received signal matrix for a single path = with multi-path Byung-Jae Kwak, ETRI, et al.

Floor Map of the Measurement Site 7 4 1 6 8 9 Tx1 Rx 13m partition desks concrete wall Concrete pillar window steel wall wall steel 18m 15m 11m 8m Tx2 (LoS) (NLoS) 5 2 3 10 AP Client STA LoS NLoS Byung-Jae Kwak, ETRI, et al.

Tx & Rx Antenna Distances Distance to client STAs from AP location 1 Tx1-Rx1 13.3m Tx1-Rx2 6.6m Tx1-Rx3 Tx1-Rx4 9.1m Tx1-Rx5 18.7m Tx1-Rx6 11.4m Tx1-Rx7 16.2m Tx1-Rx8 11.6m Tx1-Rx9 18.6m Tx1-Rx10 18.2m Distance to client STAs from AP location 2 Tx2-Rx1 17.3m Tx2-Rx2 14.3m Tx2-Rx3 13.2m Tx2-Rx4 10.6m Tx2-Rx5 11.6m Tx2-Rx6 7.2m Tx2-Rx7 5.2m Tx2-Rx8 5.4m Tx2-Rx9 8.9m Tx2-Rx10 10.7m Byung-Jae Kwak, ETRI, et al.

How to Read the 3D/Contour Plots 6 Tx1 partition desks concrete wall Concrete pillar window steel wall wall steel 15m 11m Byung-Jae Kwak, ETRI, et al.

AP Location 1: NLOS (1/4) Byung-Jae Kwak, ETRI, et al. Tx1 7 6 9 partition desks concrete wall Concrete pillar window steel wall wall steel 13m 18m 15m 11m 5 10 Byung-Jae Kwak, ETRI, et al.

AP Location 1: NLOS (2/4) Tx1, Rx5 Tx1, Rx6 Byung-Jae Kwak, ETRI, et al.

AP Location 1: NLOS (3/4) Tx1, Rx7 Tx1, Rx9 Byung-Jae Kwak, ETRI, et al.

AP Location 1: NLOS (4/4) Tx1, Rx10 Byung-Jae Kwak, ETRI, et al.

AP Location 1: LOS (1/4) Byung-Jae Kwak, ETRI, et al. Tx1 4 1 8 13m partition desks concrete wall Concrete pillar window steel wall wall steel 15m 8m 2 3 Byung-Jae Kwak, ETRI, et al.

AP Location 1: LOS (2/4) Tx1, Rx1 Tx1, Rx2 Byung-Jae Kwak, ETRI, et al.

AP Location 1: LOS (3/4) Tx1, Rx3 Tx1, Rx4 Byung-Jae Kwak, ETRI, et al.

AP Location 1: LOS (4/4) Tx1, Rx8 Byung-Jae Kwak, ETRI, et al.

AP Location 2: NLOS (1/4) Byung-Jae Kwak, ETRI, et al. Tx2 window 2 7 4 1 partition desks concrete wall Concrete pillar window steel wall wall steel 18m Tx2 2 10 Byung-Jae Kwak, ETRI, et al.

AP Location 2: NLOS (2/4) Tx2, Rx1 Tx2, Rx2 Byung-Jae Kwak, ETRI, et al.

AP Location 2: NLOS (3/4) Tx2, Rx4 Tx2, Rx7 Byung-Jae Kwak, ETRI, et al.

AP Location 2: NLOS (4/4) Tx2, Rx10 Byung-Jae Kwak, ETRI, et al.

AP Location 2: LOS (1/4) Byung-Jae Kwak, ETRI, et al. Tx2 window 3 6 8 9 partition desks concrete wall Concrete pillar window steel wall wall steel Tx2 5 3 Byung-Jae Kwak, ETRI, et al.

AP Location 2: LOS (2/4) Tx2, Rx3 Tx2, Rx5 Byung-Jae Kwak, ETRI, et al.

AP Location 2: LOS (3/4) Tx2, Rx6 Tx2, Rx8 Byung-Jae Kwak, ETRI, et al.

AP Location 2: LOS (4/4) Tx2, Rx9 Byung-Jae Kwak, ETRI, et al.

Discussion In NLOS case, the AoD has uniform random distribution over 0o~360o. The above seems to be true even when the AP is located close to the wall. The results also supports TGac’s tentative conclusion made in May meeting that NLOS AoA, LOS AoA, and LOS AoD have uniform distribution over 0o~360o. Byung-Jae Kwak, ETRI, et al.

Text Proposal Modify subclause 4 of IEEE 802.11-09/0308r5, “TGac Channel Model Addendum,” IEEE 802.11 #115, May 2009, as indicated below: ----- Begin Text Proposal ----- 4. Modifications to AoA and AoD for Multi-User MIMO TGac requires specification of channels to multiple users as simultaneous communication will take place to multiple STAs in technologies like multi-user MIMO. The TGn channel model document specifies the cluster AoAs and AoDs for point-to-point single user transmissions. Extensions of these AoDs and AoAs to the multi-user case are needed. Multi-user channels shall be modeled with the following modifications to the AoA and AoD for each client: Assume TGn-defined cluster AoDs and AoAs as baseline. For each client: Apply single random offset uniformly distributed over ±180° to the LOS tap AoA Apply single random offset uniformly distributed over ±180° to the LOS tap AoD Apply single random offset uniformly distributed over ±180° to the NLOS cluster AoAs Apply single random offset uniformly distributed over ±180° to the NLOS cluster AoDs ----- End Text Proposal ----- Byung-Jae Kwak, ETRI, et al.

References [1] IEEE 802.11-09/0543r0, “Measured Channel Capacity and AoD Estimation for Multi-User MIMO Scenarios,” IEEE 802.11 #115, May 2009. [2] IEEE 802.11-09/0308r5, “TGac Channel Model Addendum,” IEEE 802.11 #115, May 2009. Byung-Jae Kwak, ETRI, et al.