(Dec 30 2000)

Sampling rate = 44.1kHz.
No of A/D channels = 2. No of RF channels = 2. Useful bandwidth 2*20 kHz. Typical operation for first fft is SIZE=2048 in case second fft is enabled. The timings below indicate Pentium Pro at 200MHz will be fast enough for that. Without second fft Pentium Pro should run with 8192 or 16384 for the first fft for this configuration. SIZE = 4096 16 bit sin squared window, bandwidth 10.77Hz Vers Name Time 0 Approx. radix 2 DIF C 13.63% SIZE = 8192 16 bit sin squared window, bandwidth 5.38Hz Vers Name Time 0 Approx. radix 2 DIF C 16.1% 1 Approx. radix 2 DIF ASM 13.5% 2 Split radix DIT C 21.5% 3 Twin approx. radix 4 DIT C 13.1% 4 Approx. radix 4 DIT C 15.98% SIZE = 16384 16 bit sin squared window, bandwidth 2.69Hz Vers Name Time 0 Approx. radix 2 DIF C 24.5% 1 Approx. radix 2 DIF ASM 19.7% 2 Split radix DIT C 26.3% 3 Twin approx. radix 4 DIT C 15.2% 4 Approx. radix 4 DIT C 18.5% |