Optimization of apodization functions in terahertz transient spectrometry.
A quadratic programming optimization procedure for designing asymmetric apodization windows tailored to the shape of time-domain sample waveforms recorded using a terahertz transient spectrometer is proposed. By artificially degrading the waveforms, the performance of the designed window in both the time and the frequency domains is compared with that of conventional rectangular, triangular (Mertz), and Hamming windows. Examples of window optimization assuming Gaussian functions as the building elements of the apodization window are provided. The formulation is sufficiently general to accommodate other basis functions.
Galvão
Roberto K H
RK
Divisão de Engenharia Eletrônica, Instituto Tecnológico de Aeronáutica, São José dos Campos, São Paulo 12228-900, Brazil.
Hadjiloucas
Sillas
S
Zafiropoulos
Apostolos
A
Walker
Gillian C
GC
Bowen
John W
JW
Dudley
Richard
R