chapter 5 by rappaport

1
Wireless CommunicationsPrinciples and
Practice2nd EditionT.S. Rappaport

• Chapter 5 Mobile Radio Propagation Small-Scale
  Fading and Multipath as it applies to Modulation
  Techniques

2
Doppler Shift Geomerty
3
Channel issues
4
Complex Baseband model for RF systems
5
Time-varying impulse response
6
Measured impulse responses
7
Channel Sounder Pulse type
8
Channel Sounder PN Type
9
Channel Sounder Swept Freq. type
10
Measured power delay profiles
11
Indoor Power Delay Profile
12
Typical RMS delay spreads
13
Two independent fading issues
14
Flat-fading (non-freq. Selective)
15
Frequency selective fading
16
Two independent fading issues
17
Rayleigh fading
18
Small-scale envelope distributions
19
Ricean and Rayleigh fading distributions
20
Small-scale fading mechanism
21
Doppler spectrum
22
Spectrum of Envelope of doppler faded signal
23
Simulating Doppler/Small-scale fading
24
Simulating Doppler fading
25
Simulating Doppler fading
26
Simulating multipath with Doppler-induced
Rayleigh fading
27
Simulating 2-ray multipath
28
SIRCIM Simulation of all indoor propagation
Characteristics
29
SMRCIM Simulation of all outdoor propagation
Characteristics
30
SIRCIM and SMRCIM

• Available from Wireless Valley Communications,
  Inc.
• Source code in C is available
• www. Wirelessvalley.com

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Angular Spread model
32
Spatial distribution of Multipath
33
Angular Spread key to fading
34
Spatial orientation of multipath impacts the
depths of fading
35
Angular Distribution of power
36
Angular Spread predicts correlation distances
37
Angular Spread predicts correlation distances