DEVELOPMENT AND IMPLEMENTATION OF A GENERAL-PURPOSE HADAMARD-TRANSFORM SPECTROMETER SIMULATION PROGRAM

A general-purpose Hadamard-transform (HT) spectrometer simulation prog ram has been developed. It combines software that simulates the operat ion of an HT spectrometer with computationally efficient algorithms fo r performing recovery of spectra, The incident spectrum can be encoded with a right-cyclic, left-cyclic, or noncyclic encodement scheme. A b lock-diagram approach is utilized, with blocks allocated for the descr iption of the spectrometer model, the addition of detector noise, and the spectrum-recovery method, The user can choose among various spectr ometer models and spectrum-recovery schemes which have been previously developed. Various algorithms are made available to implement the rig ht-cyclic matrix inversions, circular correlations, and vector-matrix multiplications required in the computation of the spectrometer output and the spectrum-estimate. This paper presents important features of the simulation program and shows an example source file.