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18.05.2006 Angelo Farina
© UNIPR (2006) | All Rights Reserved | Confidential
How
to get better spatial resolution?
§The answer is simple: analyze the spatial distribution of both source
and receiver by means of higher-order
spherical harmonics expansion
§Spherical harmonics analysis is the equivalent, in space domain, of
the Fourier analysis in time domain
§As a complex time-domain waveform
can be thought as the sum of a number of sinusoidal
and cosinusoidal functions, so a complex spatial distribution around a given notional point can be expressed as the sum of a number of
spherical harmonic functions
