Patent ID: 6222873
Filing Date: 2001-04-24
Classification: H04B,H04J

Abstract:
An orthogonal complex spreading method for a multichannel, comprising the steps of:complex-summing .alpha..sub.n1 W.sub.M,n1 X.sub.n1 which is obtained by multiplying an orthogonal Hadamard sequence W.sub.M,n1 by a first data X.sub.n1 and gain .alpha..sub.n1 of a n-th block and .alpha..sub.n2 W.sub.M,n2 X.sub.n2 which is obtained by multiplying an orthogonal Hadamard sequence W.sub.M,n2 by a second data X.sub.n2 and gain .alpha..sub.n2 of a n-th block;complex-multiplying .alpha..sub.n1 W.sub.M,n1 X.sub.n1 +j.alpha..sub.n2 W.sub.M,n2 X.sub.n2 which is summed in the complex type and W.sub.M,n3 +jW.sub.M,n4 of the complex type using a complex multiplier and outputting as an in-phase information and quadrature phase information; andsumming only in-phase information outputted from a plurality of blocks and only quadrature phase information outputted therefrom and spreading the same using a spreading code.