2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/137151It's the key research topic of signal processing that recognizing genuine targets real time from the disturbed signal which has giant amount of data. A quantum algorithm for pattern recognition of classical signal which has time complexity O(sqrt(N)) is presented in this paper. Key Words: Pattern recognition, Grover's algorithm, Rotation on subspace8 papges, 1 figuresQuantum Physicstext