IEEE 802.16M

CASE STUDY

CHANNEL MODEL

Siddharth NairG200901750

EE 57804/12/10

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

1000 2000 3000 4000 5000 6000 7000 8000 9000 1000050

100

150

200

250

300

350

400Large Scale Path Loss With Shadowing Effect

Distance (m)

Pat

h Lo

ss (

dB)

URBAN NLOS MACROCELL | SF = 8 dB

SUBURBAN NLOS MACROCELL | SF = 8 dBURBAN LOS MICROCELL | SF = 3 dB

0 100 200 300 400 500 600 700 800 900 100050

60

70

80

90

100

110

120

130

140Large Scale Path Loss With Shadowing Effect

Distance (m)

Pat

h Lo

ss (

dB)

URBAN LOS MICROCELL | SF = 3 dB

5

NO SHADOWING

1000 2000 3000 4000 5000 6000 7000 8000 9000 10000

102

103

Large Scale Path Loss

Distance

Pat

h Lo

ss

URBAN NLOS MACROCELL

SUBURBAN NLOS MACROCELLURBAN LOS MICROCELL

6

0 100 200 300 400 500 600 700 800 900 100050

60

70

80

90

100

110

120

130

140Large Scale Path Loss

Distance (m)

Pat

h Lo

ss (

dB)

URBAN LOS MICROCELL

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

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5

x 10-6

-0.4

-0.2

0

0.2

0.4Receiver 1

Real

Imag

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5

x 10-6

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

0.4Receiver 2

Real

Imag

12

FREQUENCY RESPONSE

-1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1

x 107

10-4

10-3

10-2

10-1

100

101

Receiver 1

Receiver 2

13

FD=350 HZ

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5

x 10-6

-0.6

-0.4

-0.2

0

0.2

0.4Receiver 1

Real

Imag

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5

x 10-6

-0.4

-0.2

0

0.2

0.4

0.6Receiver 2

Real

Imag

-1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1

x 107

10-4

10-3

10-2

10-1

100

101

Receiver 1

Receiver 2

14

URBAN NLOS MICROCELL

15

INPUT

Fs = 20e6 Hz Fd = 0 Hz Ts = 1/Fs Nt = 2 Nr = 2

16

IMPULSE RESPONSE

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5

x 10-6

-0.2

-0.1

0

0.1

0.2

0.3

0.4

0.5Receiver 1

Real

Imag

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5

x 10-6

-0.4

-0.3

-0.2

-0.1

0

0.1

0.2

0.3Receiver 2

Real

Imag

17

FREQUENCY RESPONSE

-1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1

x 107

10-3

10-2

10-1

100

101

Receiver 1

Receiver 2

18

THANK YOU !!

QUESTIONS AND COMMENTS