LECTURE 3.

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Presentation transcript:

LECTURE 3

BACK TO # 2

Stationary random process

Narrow-band, wide-band processes Power spectrum of the random process Narrow-band, wide-band processes

Ergodicity

if T is a statistically homogeneous (stationary) random process, and

Self-averaging random quantity

specific additive random quantity Central Limit Theorem

L J(L) free space solution

single measurement calculation

it is NOT a self-averaging Self-averaging random quantities it is NOT a self-averaging quantity ~ 0.97

If is a self-averaging random quantity so that at , and then

I(x) L T(L) T(L) = I(x=L)

random function

typical behavior

Green’s function point source

Limit of a normal distribution

propagator

Homogeneous space

far zone

in the far zone

resonant Bragg scattering

V energy flux density Differential SCS

Total SCS

INVERSE PROBLEM