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Unformatted text preview: second for your final most efficient design. Assume L 2 log 2 L multiples per FFT. P = 397, = 396, Number of good points per window: N g = L . mult. / sec = (wind/sec)(mult./wind) = ( f s / N g )(2 L 2 log 2 L + L ) = ( 10 4 L − 396 )( L log 2 L + L ) . Extract L points, overlap P1 FFT L points FFT L points Zero pad to L points Extract last L  P + 1 points Concatinate IFFT L points x [ n ] x r [ n ] X r [ k ] h [ n ] H [ k ] Y r [ k ] y r [ n ] y [ n ] L = 4096 is optimal. ν L Number of multiplies × 10 6 8 256 No good: L < θ 9 512 4.41 10 1024 1.79 11 2048 1.49 12 4096 1.44 BEST!! 13 8192 1.47 14 16384 1.54 15 32768 1.62...
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This note was uploaded on 03/16/2012 for the course ECEN 487 taught by Professor Dr.brianjeffs during the Winter '12 term at BYU.
 Winter '12
 Dr.BrianJeffs

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