Omni-directional Multiple Antenna Transmission for Wireless Users
Explore the considerations for multiple antenna transmission in access points, focusing on omni-directional transmission as a basic case. Discusses alternatives such as independent OFDM symbols and cyclic shift diversity. Includes a straw poll on preferred approaches. References relevant draft standards.
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January 2018 doc.: IEEE 802.11-18/0144r1 Omni-directional Multiple Antenna Transmission for WUS Date: 2018-01-14 Authors: Name Dennis Sundman Affiliations Address Ericsson Phone email dennis.sundman@eric sson.com leif.r.wilhelmsson@er icsson.com miguel.m.lopez@erics son.com Leif Wilhelmsson Ericsson Miguel Lopez Ericsson Submission Slide 1 Dennis Sundman, Ericsson
January 2018 doc.: IEEE 802.11-18/0144r1 Abstract While drawing figures for the transmitter, we realized that the case where the AP has multiple TX antennas must be considered The most basic multiple antenna case is omni-directional transmissions Submission Slide 2 Dennis Sundman, Ericsson
January 2018 doc.: IEEE 802.11-18/0144r1 Some alternatives Independent OFDM symbols on the different antennas No unintentional beamforming Requires several OFDM symbols to be designed Cyclic shift diversity No unintentional beamforming CSD is expected to work well with OOK Already well established Submission Slide 3 Dennis Sundman, Ericsson
January 2018 doc.: IEEE 802.11-18/0144r1 Straw Poll For multiple transmit antennas, do you: 1. Prefer to study the matter further 2. Prefer to use the CSD similar to VHT 3. Prefer to use independent symbols on each antenna 1/2/3: Submission Slide 4 Dennis Sundman, Ericsson
January 2018 doc.: IEEE 802.11-18/0144r1 References [1] 11-18-0152-00-00ba-proposed-draft-wur-phy- specification, Shellhammer et al. Submission Slide 5 Dennis Sundman, Ericsson
