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Doc.:IEEE 802.11-10/0566r1 Submission May 2010 Vinko Erceg et al.Slide 1 Sounding and P Matrix Proposal Authors: Date: 2010-05-16 Slide 1.

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Presentation on theme: "Doc.:IEEE 802.11-10/0566r1 Submission May 2010 Vinko Erceg et al.Slide 1 Sounding and P Matrix Proposal Authors: Date: 2010-05-16 Slide 1."— Presentation transcript:

1 doc.:IEEE 802.11-10/0566r1 Submission May 2010 Vinko Erceg et al.Slide 1 Sounding and P Matrix Proposal Authors: Date: 2010-05-16 Slide 1

2 doc.:IEEE 802.11-10/0566r1 Submission May 2010 Introduction Sounding Format 6x6 and 8x8 P matrices P matrices for Nsts<=4 Straw polls Vinko Erceg et al.Slide 2

3 doc.:IEEE 802.11-10/0566r1 Submission May 2010 Sounding Mechanism (1) In 11n, there are multiple sounding formats: –Staggered sounding –NDP sounding It would be desirable in TGac to converge onto a single sounding format –Compatibility and interoperability complications with multiple formats Our proposal is to converge onto a single sounding mechanism: –NDP sounding frame format Slide 3Vinko Erceg et al.Slide 3

4 doc.:IEEE 802.11-10/0566r1 Submission May 2010 Sounding Mechanism (2) NDP sounding advantages –Defines a cleaner and simpler immediate feedback protocol ACK is not required –Less latency in providing CSI feedback when to compared to staggered sounding No Data present May be important for MU feedback –Channel staleness problem –Only channel estimation for CSI feedback is performed after receiving an NDP packet Potential parallel processing for data demodulation is avoided –Works well with MU sounding mechanism Sounding for multiple users Slide 4Vinko Erceg et al.Slide 4

5 doc.:IEEE 802.11-10/0566r1 Submission May 2010 P Matrix Definition (1) In TGac, new P matrices for Nsts > 4 need to be defined Proposal to define 6x6 DFT matrix P as follows Slide 5Vinko Erceg et al.Slide 5

6 doc.:IEEE 802.11-10/0566r1 Submission May 2010 P Matrix Definition (2) Proposal to define 8x8 matrix P as follows: where P 4x4 is the 11n 4x4 P matrix Slide 6Vinko Erceg et al.Slide 6

7 doc.:IEEE 802.11-10/0566r1 Submission May 2010 P Matrix Definition (3) We propose the same P matrix as in 11n, when Nsts<=4 in 11ac packets We propose not to include 5x5 and 7x7 P matrices in the draft Tgac standard due to implementation complexity reasons Slide 7Vinko Erceg et al.Slide 7

8 doc.:IEEE 802.11-10/0566r1 Submission May 2010 Straw Polls Vinko Erceg et al.Slide 8

9 doc.:IEEE 802.11-10/0566r1 Submission May 2010 Vinko Erceg et al. Straw Poll #1 Do you support adding the following item into the specification framework document, 11-09/0992? –R3.2.1.J: All VHT transmissions shall have a preamble which contains a single section of long training fields, with each long training field multiplied by entries belonging to a single P matrix, to enable channel estimation at the receiver. –Yes: –No: –Abs: Slide 9

10 doc.:IEEE 802.11-10/0566r1 Submission May 2010 Vinko Erceg et al. Straw Poll #2 Do you support adding the following item into the specification framework document, 11-09/0992? –R3.2.2.C: The draft specification shall include null data packet (NDP) as the only preamble format for sounding PPDUs. –Yes: –No: –Abs: Slide 10

11 doc.:IEEE 802.11-10/0566r1 Submission May 2010 Vinko Erceg et al. Straw Poll #3 Do you support adding the following item into the specification framework document, 11-09/0992? –R3.2.1.K: The single section of long training fields consists of one, two, four, six or eight VHT long training fields (VHT-LTFs) that are necessary for demodulation of the VHT-Data portion of the PPDU or for channel estimation during an NDP packet. –Yes: –No: –Abs: Slide 11

12 doc.:IEEE 802.11-10/0566r1 Submission May 2010 Vinko Erceg et al. Straw Poll #4 Do you support adding the following item into the specification framework document, 11-09/0992? –R3.2.1.K: The VHT-LTF mapping matrix P for one, two or four VHT-LTFs shall be the same as defined in 802.11n standard specification (Section 20.3.9.4.6, Eq. (20-27)). –Yes: –No: –Abs: Slide 12

13 doc.:IEEE 802.11-10/0566r1 Submission May 2010 Vinko Erceg et al. Straw Poll #5 Do you support adding the following item into the specification framework document, 11-09/0992? –R3.2.1.L: The VHT-LTF mapping matrix P for six VHT-LTFs shall be as defined in slide 4 of 11-10/00xxr0. –Yes: –No: –Abs: Slide 13

14 doc.:IEEE 802.11-10/0566r1 Submission May 2010 Vinko Erceg et al. Straw Poll #6 Do you support adding the following item into the specification framework document, 11-09/0992? –R3.2.1.L: The VHT-LTF mapping matrix P for eight VHT-LTFs shall be as defined in slide 5 of 11-10/00xxr0. –Yes: –No: –Abs: Slide 14


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