A time-limited pseudo-random signal is an important component in perturbation signals during a system identification procedure. In this paper, a finite-time duration pseudo-random waveform with desired continuous spectral features is generated using an extended time-frequency domain swapping algorithm. Multi-Sine waveforms are used as initial waveforms. Through iterations, the waveform is polished to achieve desired spectral features and small crest factor. A comparison with multi-sine waveforms shows that the new waveform generated with the proposed algorithm has a much flatter spectrum and smaller crest factor as being desired.
Revised: April 5, 2010 |
Published: September 3, 2008
Citation
Zhou N., and J.W. Pierre. 2008.Time-Limited Perturbation Waveform Generation by an Extended Time-Frequency Domain Swapping Algorithm. In The 51st IEEE Midwest Symposium on Circuits and Systems (MWSCAS 2008), August 10-13, 2008, Knoxville, Tennessee, 149-152. Piscataway, New Jersey:Institute of Electrical and Electronics Engineers.PNNL-SA-60512.doi:10.1109/MWSCAS.2008.4616758