LathiB.P. Lathi is Professor Emeritus at California State University, Sacramento. He is author of Signals and Systems, Linear Systems and Signal Processing, Modern Digital and Analog Communication Systems, and Digital Signal Processing. Roger Green is Assciate Professor of Electrical Engineering at North Dakota State University. He has published numerous scholarly articles and given presentations on MATLAB, Signal Processing, and Fourier Analysis as a member of both the IEEE and ASEE. Along with four colleagues, he is the proud owner of a patent for a Vector Calibration System, designed to identify vector mismatch between a plurality of signal paths and frequencies. Read More Read Less