We present a new method to construct unit norm tight frames by applying altered Hadamard matrices. Also we determine an elementary construction which can be used to produce a unit norm frame with prescribed spectrum of frame operator.
A. Abdollahi. M. Monfaredpour. "Tetris Tight Frames Construction via Hadamard Matrices." Abstr. Appl. Anal. 2014 1 - 8, 2014. https://doi.org/10.1155/2014/917491