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Wireless Channels:Small Scale Fading

(Multipath and Doppler Effect)

These slides contains copyrighted materials from Prentice all !nc"" Thesefigures are pro#ided as instructor resources$ and sources of these figuresare:Wireless Communications and %et&or'ing$on W" Mar'$ Weihua huangWireless Communications: Principles and Practice$ Theodore S" *appaport

Wireless Communications+,-..-//+-+0

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Doppler Shift 1eometry

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Channel issues

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Comple2 3ase4and model for*F systems

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Time-#arying impulse response

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5inear Time !n#ariant (5T!) channel

5inear Time 6ariant (5T6) channel

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Multipath propagation

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Measured impulse responses

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Measured po&er delay profiles

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!ndoor Po&er Delay Profile

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T&o independent fading issues

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Flat-fading (non-fre7" Selecti#e)

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Fre7uency selecti#e fading

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T&o independent fading issues

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*ayleigh fading

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le#el crossing