Patent ID: 6108369
Filing Date: 2000-08-22
Classification: H04B,H04J

Abstract:
A transmitter having an in-phase (I) branch and a quadrature (Q) branch for transmitting a composite, spread spectrum signal including at least two physical channels, said transmitter comprising:means, associated with said I branch, for spreading data associated with one of said at least two physical channels using a first spreading code selected from a code tree having codes that are orthogonal to one another as well as codes that are non-orthogonal to one another to generate a first spread physical channel; andmeans, associated with said Q branch, for spreading data associated with another of said at least two physical channels using a second spreading code selected from said code tree to generate a second spread physical channel;wherein said first and second spreading codes have a different number of chips and said first and second spreading codes are selected from said code tree so that said first and second spread physical channels are orthogonal to one another.