lecture3 - Lecture 3 - EE 359: Wireless Communications -...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Lecture 3 - EE 359: Wireless Communications - Fall 2011 Shadowing, Combined Path Loss/Shadowing, Coverage Area, Model Parameters. Lecture Outline • Log Normal Shadowing • Combined Path Loss and Shadowing • Outage Probability • Cell Coverage Area • Model Parameters from Empirical Data 1. Log-normal Shadowing: • Statistical model for variations in the received signal amplitude due to blockage. • The received signal power with the combined effect of path loss (power falloff model) and shadowing is, in dB, given by P r (dB) = P u (dB) + 10 log 10 K- 10 γ log 10 ( d/d ) + ψ (dB) . • Empirical measurements support the log-normal distribution for ψ : p ( ψ dB ) = 1 √ 2 πσ ψ dB exp bracketleftBigg- ( ψ dB- μ ψ dB ) 2 2 σ 2 ψ dB bracketrightBigg . • This empirical distribution can be justified by a LLN argument. • The autocorrelation based on measurements follows an autoregressive model: A ψ ( δ ) = σ 2 ψ dB e- δ/X c = σ 2 ψ dB e- vτ/X c , where X c is the decorrelation distance, which depends on the environment.is the decorrelation distance, which depends on the environment....
View Full Document

Page1 / 2

lecture3 - Lecture 3 - EE 359: Wireless Communications -...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online