Submission doc.: IEEE 11-15-0425-01-00ah Corrections to TGah Channel Model Date: 2015-03-12 Slide 1InterDigital Communications March 2015 Authors:

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Submission doc.: IEEE ah Corrections to TGah Channel Model Date: Slide 1InterDigital Communications March 2015 Authors:

Submission doc.: IEEE ah Context Document IEEE /0968r3 [1] provides TGah outdoor and indoor channel models Based on 3GPP/3GPP2 spatial channel model (SCM) and TGn (MIMO) channel models. Particularly, TGah indoor path loss model is modelled by directly scaling down the frequency operation of the TGn model [2] Recently, a few academic research papers have been published which use TGah Channel Model as a reference Slide 2Eduard Garcia-Villegas (UPC) March 2015

Submission doc.: IEEE ah The error According to TGn [2], path loss is given by: TGah indoor path loss model [1] uses eqs. (1) and (2): Slide 3Eduard Garcia-Villegas (UPC) March 2015 L FS (d) d ≤ d BP L(d) = L FS (d BP ) + 35 log 10 (d / d BP )d > d BP L FS is the free space loss eq. (slope of 2) L FS (d) d ≤ d BP L(d) = L FS (d) + 35 log 10 (d / d BP )d > d BP

Submission doc.: IEEE ah The error Slide 4Eduard Garcia-Villegas (UPC) March 2015 L FS (d) d ≤ d BP L(d) = L FS (d BP ) + 35 log 10 (d / d BP )d > d BP L FS is the free space loss eq. (slope of 2) TYPO: Applies losses from d BP twice! According to TGn [2], path loss is given by: TGah indoor path loss model [1] uses eqs. (1) and (2): L FS (d) d ≤ d BP L(d) = L FS (d) + 35 log 10 (d / d BP )d > d BP

Submission doc.: IEEE ah The error ~40dB difference at 500m (d BP = 5m) ~25dB difference at 500m (d BP = 30m) Slide 5Eduard Garcia-Villegas (UPC) March 2015

Submission doc.: IEEE ah Proposed changes to TGah Channel Model Replace L FS (d) with L FS (d BP ) in eq. (2) Replace L FS (d) with L FS (d BP ) in eq. (3) Update date and revision number Slide 6Eduard Garcia-Villegas (UPC) March 2015

Submission doc.: IEEE ah References 1.“TGah Channel Model – Proposed Text”, IEEE /0968r3 2.“TGn Channel Models”, IEEE /940r4 Slide 7Eduard Garcia-Villegas (UPC) March 2015