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Unformatted text preview: n ) = A cos( ω n + θ ) = A cos( ω n + 2 kπn + θ ) The highest rate of oscillation in a discretetime sinusoid is attained when ω = π (or ω =π ) or equivalently f = 1 2 (or f =1 2 ). Summary 1 – p. 3/ 4 Some Useful Definitions Energy: E = ∞ s n =∞  x ( n )  2 Cross correlation between real signals x ( n ) and y ( n ) : r xy ( l ) = ∞ s n =∞ x ( n ) y ( nl ) Auto correlation (real signal): r xx ( l ) = ∞ s n =∞ x ( n ) x ( nl ) Summary 1 – p. 4/ 4...
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 Fall '10
 Prof.HamidJafarkhani
 Digital Signal Processing, Frequency, Signal Processing, Cos, Hamid Jafarkhani, DiscreteTime Sinusoidal Signals, ContinuousTime Sinusoidal Signals

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