Effects of time delay spread on constant-power constant-symbol-rate adaptive QAM

2006 ◽  
Vol 42 (24) ◽  
pp. 1411 ◽  
Author(s):  
X.-H. Shan ◽  
G.-G. Bi
Keyword(s):  
Time Delay ◽  
Delay Spread ◽  
Constant Symbol ◽  
Constant Power ◽  
Symbol Rate ◽  
Rate Adaptive

Analysis of the effects of time delay spread on TCM performance

1999 ◽  
Vol 17 (7) ◽  
pp. 1212-1223 ◽  
Author(s):  
Pingyi Fan ◽  
K.B. Letaief ◽  
R.D. Murch
Keyword(s):  
Time Delay ◽  
Delay Spread

Flame Transfer Function for Swirled LPP Combustion From Experiments and CFD

2004 ◽  
Author(s):  
Carol A. Armitage ◽  
Alex J. Riley ◽  
R. Stewart Cant ◽  
Ann P. Dowling ◽  
Simon R. Stow
Keyword(s):  
Time Delay ◽  
Transfer Function ◽  
Gas Turbines ◽  
Transfer Functions ◽  
Low Frequency ◽  
Analytical Models ◽  
Delay Spread ◽  
Good Representation ◽  
Atmospheric Conditions ◽  
Spread Model

Combustion oscillations that arise in gas turbines can lead to plant damage. One method used to predict these oscillations is to analyse the acoustics using a simple linear model. This model requires a transfer function to describe the response of the heat release to flow perturbations. A transfer function has been obtained for a swirled premixed combustion system using experiments under atmospheric conditions and CFD. These results have been compared with analytical models. The experimental and computational transfer functions both indicate a low frequency zero. A time-delay spread model gives a good representation of the computational transfer function. The experimental transfer function is described well by a model that combines a time-delay spread with a constant gain.

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