1. <month year>
doc.: IEEE a
July 2006
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: [Summary and Recommendations to TG3c Channel Model Subgroup]
Date Submitted: [16 May, 2006]
Source: [Su-Khiong Yong]
Company [Samsung Advanced Institute of Technology (SAIT)]
Address [RF Technology Group, Comm. & Networking Lab., P. O. Box 111, Suwon , Korea]
Voice:[ ], FAX: [ ],
Re : [IEEE c Channel modeling]
Abstract: [Recommendations for the 3c Channel Model Subgroup]
Purpose:[This document discusses the propagation issues and parameters for IEEE c]
Notice :This document has been prepared to assist the IEEE P It is offered as a basis for
discussion and is not binding on the contributing individual(s) or organization(s). The material in
this document is subject to change in form and content after further study. The contributor(s)
reserve(s) the right to add, amend or withdraw material contained herein.
Release:The contributor acknowledges and accepts that this contribution becomes the property of IEEE
and may be made publicly available by P
Su-Khiong Yong, Samsung-SAIT
<author>, <company>

2. Summary and Recommendations to TG3c Channel Modeling Subgroup
<month year>
doc.: IEEE a
July 2006
Summary and Recommendations to TG3c Channel Modeling Subgroup
Su-Khiong Yong
Samsung Advanced Institute of Technology (SAIT), Korea
Su-Khiong Yong, Samsung-SAIT
<author>, <company>

3. Outline Objectives Status of the Channel Model
<month year>
doc.: IEEE a
July 2006
Outline
Objectives
Status of the Channel Model
Summary and Proposed Set of the Channel Models
Future Plan
Su-Khiong Yong, Samsung-SAIT
<author>, <company>

4. July 2006
Status of the Work
IBM data analysis remains unresolved – unable to distinguish LOS and NLOS data
UMASS data measurements and analysis are still on going
IMST data analysis completed
NICT data analysis – amplitude statistics yet to be completed, AOA intra cluster statistics are yet to revised
FT completed the channel parameters
Su-Khiong Yong, Samsung-SAIT

5. UMASS – Office (LOS & NLOS) and Conference Room (LOS & NLOS)
July 2006
UMASS – Office (LOS & NLOS) and Conference Room (LOS & NLOS)
Measurements are still on going
Proposed AWGN channel but rays with significant delay can be observed.
AOA statistics are yet to determined.
Su-Khiong Yong, Samsung-SAIT

6. IMST Results – Library LOS
July 2006
IMST Results – Library LOS
Inter-cluster Power Delay Profile parameters
Exponential PDP: K factor KLOS = 8 [dB], cluster decay Γ = 12 [ns]
Flat-Exponential PDP: K factor KLOS = 8 [dB], cluster decay Γ = 12 [ns], Δ = 11 [dB], τ = 30 [ns]
Inter-cluster DoA – Uniform distribution
Intra-cluster DoA – Gaussian (Angles Spread (AS) σAS = 10 [0])
Inter-cluster ToA / Intra-cluster ToA – Poisson (Λ = 0.25 [ns-1] / λ = 4 [ns-1])
Cluster / Ray amplitude – Log-normal (σ1 = 5 [dB] / σ2 = 6 [dB])
Intra-cluster K factor KMP = -13 [dB]
Intra-cluster ray decay γ = 7 [ns]
Shadowing effect can be modeled by dropping the LOS component and keeping the other parameter unchanged for LOS scenario.
Final Refinement
Check the AOA distribution with truncated Gaussian
What is the average number of clusters?
Inter cluster DOA uniform over [0,2pi]?
Su-Khiong Yong, Samsung-SAIT

7. NICT Results –Desktop LOS
July 2006
NICT Results –Desktop LOS
S-V model parameter
W0(D) G
[ns]
1/L
- Cluster arrival is Poisson.
dist. . g
1/l
- Ray arrival is Poisson dist. s1
[dB]
-Cluster Power is lognormal dist.
s2 [dB]
Ray Power is lognormal dist.
sf [deg]
-Intra cluster AOA is Laplacian dist
# of cluster
- Uniform dist.
Tx:30
Rx:30
4.44 D-105
21.1
27.0
8.85
1.56
3.01
7.69
34.6 3
Tx:60
Rx:60
3.46 D-98
22.3
17.2
2.68
7.27
4.42
38.1
Su-Khiong Yong, Samsung-SAIT

8. NICTA Results – Office NLOS
July 2006
NICTA Results – Office NLOS
Parameter
Value
unit
Distribution
Cluster arrival rate
0.07
1/ns
Poisson
ray arrival rate
1.88
Cluster decay factor
19.44 ns
Exponential
Ray decay factor
0.42
Cluster gain standard deviation
1.82
Lognormal
Ray gain standard deviation
AoA standard deviation
9.10
Degrees
Laplacian
RMS delay spread
24.82
Average number of clusters 6
Uniform
Su-Khiong Yong, Samsung-SAIT

9. NICTA Results – Desktop LOS
July 2006
NICTA Results – Desktop LOS
Parameter
Value
unit
Distribution
Cluster arrival rate
1.72
1/ns
Poisson
ray arrival rate
3.14
Cluster decay factor
4.01 ns
Exponential
Ray decay factor
0.58
Cluster gain standard deviation
2.70
Lognormal
Ray gain standard deviation
1.90
AoA standard deviation
14.38
degrees
Normal
RMS delay spread
2.27
Average number of clusters 14
Uniform
Su-Khiong Yong, Samsung-SAIT

10. NICTA Results – Residential LOS
July 2006
NICTA Results – Residential LOS
Parameter
Value
unit
Distribution
Cluster arrival rate
0.21
1/ns
Poisson
ray arrival rate
0.77
Cluster decay factor
4.19 ns
Exponential
Ray decay factor
1.07
Cluster gain standard deviation
1.54
Lognormal
Ray gain standard deviation
1.26
AoA standard deviation
8.32
degrees
Laplacian
RMS delay spread
2.27
Average number of clusters 4
Uniform
Su-Khiong Yong, Samsung-SAIT

11. July 2006
Open Issues
Amplitude statistics is claimed to be log-normal without presenting the result?
Issue on the average number of clusters has no yet resolved. The proposed values does not seem to match with the previous results.
Uncertainties about the AOA statistics in Desktop environment. The Gaussian distribution does not model well the AOA. Maybe Truncated Gaussian / Truncated Laplacian can do the job.
Some of the analysis such as ray and cluster arrivals are very crude. Need to revisit the fittings of these results?
Several set of parameters for different antenna configurations are missing for the NICT measurements.
Su-Khiong Yong, Samsung-SAIT

12. France Telecom Results 06/218
July 2006
France Telecom Results 06/218
Large scale fading
Parameter
Scenarios
Residential
Office
Omni or wide beam antenna
Narrow beam antenna
LOS
NLOS n
1.53
2.44
1.73
0.56
PL(d0) (dB)
44.5
37.2
36.9
70.6
σS (dB)
1.5
6.2
1.6
1.2
Su-Khiong Yong, Samsung-SAIT

13. France Telecom Results 06/218
July 2006
France Telecom Results 06/218
Small Scale Fading
Scenario
Link
Power decay parameters
# of clusters γ
(ns) Г ΔT
Residential 1
(wide beam antenna)
LOS 2
6.7
38.9
47.9
NLOS
17.0
61.7
38.1
Residential 2
(narrow beam antenna) 1
1.8 NA
8.6
36.8
31.3
Office 1
17.3
41.7
52.7
21.5
47.7
39.1
Office 2
15.9
68.8
59.6
48.9
No distribution for amplitude statistics are provided. Also no cluster and ray arrival rates
Su-Khiong Yong, Samsung-SAIT

14. France Telecom AOA for office environment only July 2006 Parameter
Values
Angular spread in the azimuth plane sφ
7° - 24°
Angular spread in the elevation plane sθ
6° - 13°
No AOA and EOA distributions are provided
2 types of antennas were used during the experiment.
- horns presenting a gain of 7.3 dBi and -3 dB beamwidth of 100° in both azimuth and elevation.
dipoles presenting a gain of 5.5 dBi and an omnidirectional radiation pattern in azimuth with
a -3 dB beamwidth of 30° in elevation, centered around the elevation of 45°.
Su-Khiong Yong, Samsung-SAIT

15. Environment Scenario Source Office LOS FT, NICTA, UMASS NLOS Desktop
NICT, NICTA
Residential
FT, NICTA FT
Conference Room
FT, UMASS
Corridor
NICTA
Library
IMST NA
July 2006
Su-Khiong Yong, Samsung-SAIT

16. Proposed Set of Channel Models
July 2006
Proposed Set of Channel Models
Residential – LOS (CM1) and NLOS (CM2)
Office – LOS (CM3) and NLOS (CM4)
Library – LOS (CM5) and NLOS (CM6)
Conference Room – LOS (CM7), NLOS (CM8)
Desktop – LOS (CM9)
Additional sets of above models with different antenna gains?
Su-Khiong Yong, Samsung-SAIT

17. July 2006
Discussions
No path loss model available from the measurements. Adopt results from literature?
Should the group move with 4 channel models that represent four environments for evaluation purposes?
Su-Khiong Yong, Samsung-SAIT

18. <month year>
doc.: IEEE a
July 2006
Future Plan
NICTA needs to update on the issues raised during this meeting. will be send to reflector.
Issue about large scale fading
Final report drafting
Matlab code generation by the contributors and Rick Roberts will coordinate that.
Su-Khiong Yong, Samsung-SAIT
<author>, <company>