1. Spectral Mask and Flatness
Month Year
doc.: IEEE yy/xxxxr0
September 2010
Spectral Mask and Flatness
Date:
Authors:
Ron Porat
Broadcom
16340 West Bernardo Dr., San Diego, CA 92127
Vinko Erceg
Robert Stacey
Intel
Eldad Perahia
Ning Zhang
Atheros
5480 Great America Parkway, Santa Clara, CA 95054, USA
Youhan Kim
Youngsoo Kim
Samsung Electronics
Mt Nongseo-Ri, Giheung-Eup,
Yongin-Si, Gyeonggi-Do, Korea
Chunhui (Allan) Zhu
Samsung
Electronics
75 W Plumeria Dr.
San Jose CA 95134
USA
Hongyuan Zhang
Marvell
5488 Marvell Ln,
Santa Clara, CA 95054
Raja Banerjea
Hemanth Sampath
Qualcomm
San Diego
VK Jones
Yongho Seok
LG Electronics, Inc.
533, Hogye-1dong, Dongan-Gu, Anyang-Shi, Kyungki-Do, ,
Daewon Lee
LG Electronics, Inc
Cheong
ETRI
161 Gajeong-dong, Yuseong-gu,
Jae Seung Lee
Vinko Erceg, Broadcom
John Doe, Some Company

2. Month Year
doc.: IEEE yy/xxxxr0
September 2010
Abstract
Propose changing maximum adjacent channel rejection to be the same as a
Propose keeping the spectral mask linear with bandwidth
Propose relaxing in band spectral flatness
Spectral flatness not used for beamforming in n - devices capable of receiving beamforming transmissions already will be receiving transmission not conforming to the spectral flatness requirement.
Allows more flexibility in shaping the spectrum to meet out-of-band emissions
Channel fades are much larger than the relaxed spectral flatness requirements
Vinko Erceg, Broadcom
John Doe, Some Company

3. September 2010
Legacy Mask
Vinko Erceg, Broadcom

4. Proposed VHT 20/40/80/160MHz Mask
September 2010
Proposed VHT 20/40/80/160MHz Mask
Vinko Erceg, Broadcom

5. Legacy Spectral Flatness
September 2010
Legacy Spectral Flatness
Vinko Erceg, Broadcom

6. Proposed VHT 20/40/80/160 Spectral Flatness
September 2010
Proposed VHT 20/40/80/160 Spectral Flatness
Noncontiguous 160 MHz devices may transmit a contiguous 160 MHz waveform by placing its two
80 MHz segments adjacent to each other. It would be difficult for such transmissions to meet the
+4/-4 dB requirement near the center of the contiguous 160 MHz waveform
Vinko Erceg, Broadcom

7. September 2010
Straw Poll #1
Do you support spectral mask requirements as outlined in slide 4?
Vinko Erceg, Broadcom

8. September 2010
Straw Poll #2
Do you support spectral flatness requirements as outlined in slide 6?
Vinko Erceg, Broadcom