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Wireless Communications Principles and Practice 2nd Edition T. S

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Presentation on theme: "Wireless Communications Principles and Practice 2nd Edition T. S"— Presentation transcript:

1 Wireless Communications Principles and Practice 2nd Edition T. S
Wireless Communications Principles and Practice 2nd 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 Fig. 3.2

4 Complex Baseband model for RF systems

5 Time-varying impulse response
Fig. 2.3

6 Measured impulse responses

7 Channel Sounder: Pulse type

8 Channel Sounder: PN Type
Fig. 2.4

9 Channel Sounder: Swept Freq. type
Fig. 2.5

10 Measured power delay profiles
Fig. 2.6

11 Indoor Power Delay Profile
Fig. 2.7

12 Typical RMS delay spreads
Fig. 2.16

13 Two independent fading issues
Fig. 2.8

14 Flat-fading (non-freq. Selective)
Fig. 2.9

15 Frequency selective fading
Fig. 2.10

16 Two independent fading issues
Fig. 2.11

17 Rayleigh fading Fig. 2.12

18 Small-scale envelope distributions
Fig. 2.13

19 Ricean and Rayleigh fading distributions
Fig. 2.14

20 Small-scale fading mechanism
Fig. 2.15

21 Doppler spectrum Fig. 2.16

22 Spectrum of Envelope of doppler faded signal
Fig. 2.16

23 Simulating Doppler/Small-scale fading
Fig. 2.16

24 Simulating Doppler fading
Fig. 2.16

25 Simulating Doppler fading
Fig. 2.16

26 Simulating multipath with Doppler-induced Rayleigh fading
Fig. 2.16

27 Simulating 2-ray multipath
Fig. 2.16

28 SIRCIM – Simulation of all indoor propagation Characteristics
Fig. 2.16

29 SMRCIM – Simulation of all outdoor propagation Characteristics
Fig. 2.16

30 SIRCIM and SMRCIM Available from Wireless Valley Communications, Inc.
Source code in C is available www. Wirelessvalley.com

31 Angular Spread model Fig. 2.16

32 Spatial distribution of Multipath
Fig. 2.16

33 Angular Spread key to fading
Fig. 2.16

34 Spatial orientation of multipath impacts the depths of fading
Fig. 2.16

35 Angular Distribution of power
Fig. 2.16

36 Angular Spread predicts correlation distances
Fig. 2.16

37 Angular Spread predicts correlation distances
Fig. 2.16


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