1. Submission Title: [Wireless Display Throughput Requirements]
<month year>
doc: IEEE c
January 2006
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: [Wireless Display Throughput Requirements]
Date Submitted: [January 2006]
Source: [Ali Sadri, Alexander Maltsev, Alexei Davydov]
Company: [Intel Corporation]
Address: [Intel Corporation, Evening Creek Drive ,San Diego , CA ,USA ]
Abstract: [IMST data analysis ,Preliminary results]
Purpose: [To provide Preliminary results of the IMST data analysis]
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
Ali Sadri (Intel Corporation)
<author>, <company>

2. Goals of preliminary data analysis
<month year>
doc: IEEE c
January 2006
Goals of preliminary data analysis
Understand the behavior of indoor mmWave channel under different conditions
Determine the basic parameters of the channel from measured data
Propose possible channel model candidates
Ali Sadri (Intel Corporation)
<author>, <company>

3. Measurement scenarios
<month year>
doc: IEEE c
January 2006
Measurement scenarios
Library environment with tables, chairs and metal bookshelves with books
3 main types of measurement scenarios
LOS: unobstructed line of sight conditions
Edge: partially obstructed line of sight by the edge of a metal bookshelf
NLOS: non line of sight obstructed by a densely filled bookshelf
3 types of RX antennas (horn, dipole array antenna, biconical)
Fixed TX lens antenna position at the suspended ceiling, RX measurements range ~2-5m
Time resolution is 1/960MHz ≈ 1ns
Ali Sadri (Intel Corporation)
<author>, <company>

4. Measurement scenarios plan
<month year>
doc: IEEE c
January 2006
Measurement scenarios plan
LOS
NLOS
Edge
Ali Sadri (Intel Corporation)
<author>, <company>

5. <month year>
doc: IEEE c
January 2006
Examples of measured channel impulse responses and PDP curves for LOS (far/near RX positions)
~30 dB
Clustering in time due to reflection from neighboring objects
Almost linear in dB scale decay of multipath part
Strong LOS component
Ali Sadri (Intel Corporation)
<author>, <company>

6. Examples of measured channel impulse responses for Edge scenario
<month year>
doc: IEEE c
January 2006
Examples of measured channel impulse responses for Edge scenario
Oscillations due to Fresnel diffraction effects and interference of direct and reflected from metal sidewall waves
Shadow from metal sidewall of bookshelf
Penetration from books
Ali Sadri (Intel Corporation)
<author>, <company>

7. Examples of measured channel impulse responses and PDP curves for NLOS
<month year>
doc: IEEE c
Examples of measured channel impulse responses and PDP curves for NLOS
January 2006
Bookshelf gives ~15 dB penetration loss. The attenuation is heterogeneous in space. The main ray is not completely faded.
Ali Sadri (Intel Corporation)
<author>, <company>

8. PDF of rays in multipath region
<month year>
doc: IEEE c
January 2006
PDF of rays in multipath region
Rayleigh distribution gives good fitting to distribution of measured ray amplitudes in multipath region
Ali Sadri (Intel Corporation)
<author>, <company>

9. Candidates for channel models
<month year>
doc: IEEE c
January 2006
Candidates for channel models
Tap delay line model with average power profile
Channel model with exponential power delay profile for multipath region
Saleh-Valenzuela channel model with random amplitude, delay time and angle of arrival of scattered rays
Ali Sadri (Intel Corporation)
<author>, <company>

10. Tap-delay line model: example of PDP for LOS environment
<month year>
doc: IEEE c
January 2006
Tap-delay line model: example of PDP for LOS environment
Note: Some typical power delay profiles may be used for different scenarios (LOS, NLOS). Fixed time of arrival is assumed for each ray.
Ali Sadri (Intel Corporation)
<author>, <company>

11. Exponential model: Tapped delay line with typical profile
<month year>
doc: IEEE c
January 2006
Exponential model: Tapped delay line with typical profile
Instantaneous channel impulse response may be represented as the sum of LOS and NLOS components
Line of site component with constant amplitude (αLOS(k) = 0, k ≠ 0)
Non line of site component with Rayleigh distributed amplitude
NLOS average power delay profile may be approximated by exponential model
Note: Two parameters are required for description of channel model: exponent parameter τ0 (RMS delay) and power ratio of LOS to NLOS component on first (zero index) tap.
Ali Sadri (Intel Corporation)
<author>, <company>

12. Saleh-Valenzuela channel model
<month year>
doc: IEEE c
January 2006
Saleh-Valenzuela channel model
Complex amplitude of a ray in multipath region
Time arrival of cluster l
Time arrival of ray k in cluster l
Instantaneous impulse response of channel
Line of site component
Delta function
Average power of the ray amplitude depends on cluster delay Tl and kth-ray delay τk,l inside of cluster l
- cluster power decay constant
- power decay constant of rays in cluster l
Notes: 1. Random angle of arrival may be also included in model.
2. Needs some criteria for parameter estimation.
Ali Sadri (Intel Corporation)
<author>, <company>

13. <month year>
doc: IEEE c
January 2006
Summary
The preliminary analysis of measured data confirmed theoretical view on mmWave propagation features in indoor environment
Three possible channel model candidates may capture observed effects
Measured data allows to analyze more complex spatial characteristics of mmWave channel (angle of arrival, ray clustering, two dimensional field structure, etc)
More analysis is needed
Ali Sadri (Intel Corporation)
<author>, <company>