IEEE 802 16m Channel Model
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Transcript IEEE 802 16m Channel Model
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