Optimum Finite Duration Nyquist Signals
P. Halpern · IRE Transactions on Communications Systems · 1979
This paper deals with the design of finite duration signals, which maximize spectral content inside a given band and which avoid intersymbol interference by being orthogonal to discretely delayed versions of itself. The signal is a solution of an integral equation With constraints. Techniques for numerically solving this equation are given. The signals are compared to the classical prolate spheroidal wave functions, for a few cases.