Jacobson, Price, Holman & Stern, PLLC
Orthogonal complex spreading method for multichannel and apparatus thereof
 An orthogonal complex spreading method for a multichannel and an apparatus thereof are disclosed. The method includes 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 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 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 +jPW.sub.M,n4 of the complex type using a complex multiplier and outputting as an in-phase information and quadrature phase information; and summing 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. 
Electronics and Telecommunications Research Institute
H H H H
H04J H04J H04B H04J
inventional additional inventional inventional
Jung Im Jae Ryong Tae Joong Ki Chul Seung Chan
Kim Shim Kim Han Bang