MIMO-OFDM Wireless Communications with MATLAB

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MIMO-OFDM WirelessCommunicationswith MATLAB
Chapter 1. The Wireless Channel
Propagation and Fading

• Yong Soo Cho Jaekwon Kim
• Won Young Yang Chung G. Kang

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Chapter 1. The Wireless Channel
Propagation And Fading

• 1.1 LARGE-SCALE FADING
• - 1.1.1 General Path Loss Model
• - 1.1.2 Okumura/Hata Model
• - 1.1.3 IEEE 802.16d Model
• 1.2 SMALL-SCALE FADING
• - 1.2.1 Parameters for Small-Scale Fading
• - 1.2.2 Time-Dispersive vs. Frequency-Dispersive
  Fading
• - 1.2.3 Statistical Characterization and
  Generation of Fading Channel

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Chapter 1. The Wireless Channel

• Figure 1.1 Classification of fading channels

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Chapter 1. The Wireless Channel
Figure 1.2 Large-scale fading vs. small-scale
fading
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Chapter 1. The Wireless Channel
Figure 1.3 Link budget for the fading
channel(1994 IEEE. Reproduced from Greenwood, D.
and Hanzo, L., Characterization of mobile radio
channels, in Mobile Radio Communications, R.
Steele(ed.), pp. 91185,1994, with permission
from Institute of Electrical and Electronics
Engineers (IEEE).)
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1.1 Large-scale fading1.1.1 General Path Loss
Model
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1.1.1 General Path Loss Model
Figure 1.4 Free-space path loss model
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1.1.1 General Path Loss Model
Environment Path Loss Exponent ( )
Free Space 2
Urban area cellular radio 2.7 to 3.5
Shadowed urban cellular radio 3 to 5
In building Line-Of-Sight 1.6 to 1.8
Obstructed in building 4 to 6
Obstructed in factories 2 to 3
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1.1.1 General Path Loss Model
Figure 1.5 Log-distance pathloss model
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1.1.1 General Path Loss Model
Figure 1.6 Log-normal shadowing path loss model
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1.1.2 Okumura/Hata Model
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1.1.2 Okumura/Hata Model
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1.1.2 Okumura/Hata Model
Figure 1.7 Hata path loss model
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1.1.3 IEEE 802.16d
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1.1.3 IEEE 802.16d
Parameter Type A Type B Type C
a 4.6 4 3.6
b 0.0075 0.0065 0.005
c 12.6 17.1 20
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1.1.3 IEEE 802.16d
Parameter Type A Type B Type C
a 4.6 4 3.6
b 0.0075 0.0065 0.005
c 12.6 17.1 20
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1.1.3 IEEE 802.16d
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1.1.3 IEEE 802.16d
Figure 1.8 IEEE 802.16d path loss model
Figure 1.9 Modified IEEE 802.16d path loss model
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1.2 Small-Scale Fading1.2.1 Time-Dispersive vs.
Frequency- Dispersive
Fading
(b) Frequency-selective fading channel
(a) Frequency-non-selective fading channel
Figure 1.10 Characteristics of fading due to time
dispersion over multi-path channel
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1.2.1 Time-Dispersive vs. Frequency-
Dispersive Fading
Tab Relative delay ( ) Average Power ( )
1 0 0.0
2 110 -9.7
3 190 -19.2
4 410 -22.8
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1.2.1 Time-Dispersive vs. Frequency-
Dispersive Fading
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1.2.1 Time-Dispersive vs. Frequency-
Dispersive Fading
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1.2.1 Time-Dispersive vs. Frequency-
Dispersive Fading
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1.2.3 Statistical Characterization and
Generation of Fading Channel
Figure 1.11 Planewave arriving at receiver moves
in the direction of x with a velocity of v
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1.2.3 Statistical Characterization and
Generation of Fading Channel
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1.2.3 Statistical Characterization and
Generation of Fading Channel
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1.2.3 Statistical Characterization and
Generation of Fading Channel
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1.2.3 Statistical Characterization and
Generation of Fading Channel
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1.2.3 Statistical Characterization and
Generation of Fading Channel
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1.2.3 Statistical Characterization and
Generation of Fading Channel
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1.2.3 Statistical Characterization and
Generation of Fading Channel
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1.2.3 Statistical Characterization and
Generation of Fading Channel
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1.2.3 Statistical Characterization and
Generation of Fading Channel
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1.2.3 Statistical Characterization and
Generation of Fading Channel