IEEE 802.16M
CASE STUDY
CHANNEL MODEL
Siddharth Nair
G200901750
EE 578
04/12/10
INTRODUCTION
Link Level Channel Model
 Large Scale & Small Scale Fading Characteristics

2
SPATIAL CHANNEL MODELING

Ray Based
Each Tap a Summation Of Rays at each time instant
 Channel Coefficients Dependent on

Antenna Configuration
 Gain Pattern
 AoA, AoD


Correlation Based
Mandatory Baseline Channel Modeling Approach
 Antenna Correlation Based On

AoA, AoD, Angular Profile, Antenna Configuration
 Provides Both Spatial and Temporal Correlation(Doppler)

3
RADIO ENVIRONMENTS
Urban Macrocell – Manhattan Type Grid
 Suburban Macrocell – Low Residential Detached Houses
 Urban Microcell – Height Of Both BS And MS Well
Below Surrounding Buildings
 Indoor Small Office
 Outdoor To Indoor – Combination Of Any Of The
Outdoor/Indoor Scenarios
 Indoor Hotspots – Conference Halls, Shopping Malls
 Open Rural Macrocell – Low Building Density

4
LARGE SCALE PATH LOSS WITH
SHADOWING

COST-231 Modified Hata Model Used
Large Scale Path Loss With Shadowing Effect
400
Large Scale Path Loss With Shadowing Effect
140
350
130
URBAN NLOS MACROCELL | SF = 8 dB
SUBURBAN NLOS MACROCELL | SF = 8 dB
URBAN LOS MICROCELL | SF = 3 dB
120
300
Path Loss (dB)
Path Loss (dB)
110
250 100
200
90
80
70
150
URBAN LOS MICROCELL | SF = 3 dB
60
50
100
50
0
100
1000
200
2000
300
3000
400
4000
500
Distance (m)
5000
Distance (m)
600
6000
700
7000
800
8000
900
9000
5
1000
10000
NO SHADOWING
Large Scale Path Loss
140
130
Large Scale Path Loss
3
10
120
Path Loss
Path Loss (dB)
110
URBAN NLOS MACROCELL
SUBURBAN NLOS MACROCELL
URBAN LOS MICROCELL
100
90
80
URBAN LOS MICROCELL
70
60
2
10
50
0
100
1000
200
2000
300
3000
400
4000
500
Distance (m)
5000
Distance
600
700
800
900
1000
6
6000
7000
8000
9000
10000
SMALL SCALE FADING
Cluster Delay Line Model Used
 CDL Model seen as an extension to Tap Delay Line
Model
 Each Cluster a Group of Multipath components whose
Large scale characteristics do not change relative to
each other

AoA, AoD
 Per Tap Power
 Delays

7
CDL MODEL –MIMO
8
SPATIAL CORRELATION CALCULATION
9
URBAN MACROCELL NLOS CHANNEL
10
INPUT
Fs = 20e6 Hz
 Fd = 0 Hz
 Ts = 1/Fs
 Nt = 2
 Nr = 2

11
IMPULSE RESPONSE
Receiver 1
0.4
Real
Imag
0.2
0
-0.2
-0.4
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
-6
x 10
Receiver 2
0.4
Real
Imag
0.3
0.2
0.1
0
-0.1
-0.2
-0.3
0
0.5
1
1.5
2
2.5
3
3.5
4
12
4.5
5
-6
x 10
FREQUENCY RESPONSE
1
10
0
10
-1
10
-2
10
-3
10
Receiver 1
Receiver 2
-4
10
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
7
x 10
13
FD=350 HZ
1
10
Receiver 1
0.4
Real
Imag
0.2
0
0
10
-0.2
-0.4
-1
-0.6
10
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
-6
x 10
Receiver 2
0.6
-2
0.4
Real
Imag
Receiver 1
Receiver 2
10
0.2
0
-3
10
-0.2
-0.4
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
-6
x 10
14
-4
10
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
7
x 10
URBAN NLOS MICROCELL
15
INPUT
Fs = 20e6 Hz
 Fd = 0 Hz
 Ts = 1/Fs
 Nt = 2
 Nr = 2

16
IMPULSE RESPONSE
Receiver 1
0.5
Real
Imag
0.4
0.3
0.2
0.1
0
-0.1
-0.2
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
-6
x 10
Receiver 2
0.3
Real
Imag
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
-6
x 10
17
FREQUENCY RESPONSE
1
10
0
10
-1
10
-2
10
Receiver 1
Receiver 2
-3
10
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
7
x 10
18
THANK YOU !!
QUESTIONS AND COMMENTS