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lecture3_1pp - EE359 Lecture 3 Outline Announcements First...

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EE359 Lecture 3 Outline Announcements First disc. Section Tues. 10/4, 6-7, Hewlett 103 HW posted, due Thurs 10/6 at 5pm. Nima OHs: Tues. 7-9PM in Packard 109; Wed. 7-9PM in Packard 104 Nima Email Ohs: Wed. 10-11PM - Thurs 10-11AM Log Normal Shadowing Combined Path Loss and Shadowing Cell Coverage Area Model Parameters from Measurements
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Lecture 2 Review Ray Tracing Models Free Space Model Power falloff with distance proportional to d -2 Two Ray Model Power falloff with distance proportional to d -4 General Ray Tracing Used for site-specific models Empirical Models Simplified Model: P r =P t K[d 0 /d] g , 2g8. Captures main characteristics of path loss
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Shadowing Models attenuation from obstructions Random due to random # and type of obstructions Typically follows a log-normal distribution dB value of power is normally distributed m =0 (mean captured in path loss), 4< s <12 (empirical) LLN used to explain this model Decorrelated over decorrelation distance X c X c
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