Download presentation
Presentation is loading. Please wait.
Published byNathaniel Johnston Modified over 8 years ago
1
Wireless Communications Principles and Practice 2 nd Edition T.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
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
31
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
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.