ECEN4533 Data
Communications
Lecture #15 11 February 2008
Dr. George Scheets
ECEN4533 Data
Communications
Lecture #16 13 February 2008
Dr. George Scheets
ECEN4533 Data
Communications
Lecture #17 15 February 2008
Dr. George Scheets
1995 OSU Backbone Packet Histogram
2004 OSU Backbone Packet Histogram
255 point zero mean discrete
time
White Noise waveform
(Adjacent points are independent)
Autocorrelation Estimate
of zero mean
Discrete Time White Noise
255 point Noise
Waveform
(Low Pass Filtered White Noise)
Autocorrelation Estimate of Low Pass Filtered White Noise
Autocorrelation in ATM Cell
Stream
Each cell slot randomly On or Off (Empty)
Autocorrelation in ATM Cell
Stream
On & Off bursts average 20 cells