Abstract
An orthogonal complex spreading method for a multichannel and an apparatus thereof are disclosed. The method includes the steps of complex-summing ? n1W Mn1X n1 which is obtained by multiplying an orthogonal Hadamard sequence W Mn1 by a first data X n1 of a n-th block and ? n2W Mn2X n2 which is obtained by multiplying an orthogonal Hadamard sequence W Mn2 by a second data X n2 of a n-th block; complex-multiplying ? n1W Mn1X n1+j? n2W Mn2X n2 which is summed in the complex type and W Mn3+jPW Mn4 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.
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