Patent ID: 6404802
Filing Date: 2002-06-11
Classification: H04L

Abstract:
A flexible modulator for binary phase shift keying and quadrature phase shift keying in a wideband code division multiple access system, said modulator comprising:a first link selecting means for selecting a modulating type after receiving a signal of a reverse channel or an I (In-phase) signal and Q (quadrature) signal of a forward channel for which a spread modulation is to be executed; a Hadamard spreading means for a Hadamard code spreading modulation after receiving said I and Q signals from said first link selecting means; an exchanging means for exchanging signal paths of said I and Q signals spread by said Hadamard spreading means when an exchange for said forward signal is needed; and, a pseudo-noise (PN) spreading means for executing a spread modulation for a pseudo-noise (PN) code of said exchanged I and Q signals.