Patent ID: 6449306
Filing Date: 2002-09-10
Classification: H04B,H04J

Abstract:
An orthogonal complex spreading method for multiple channels, comprising the steps of:complex-summing WM,n1Xn1, which is obtained by multiplying an orthogonal code sequence WM,n1 by first data group Xn1 of a n-th block, and WM,n2Xn2, which is obtained by multiplying an orthogonal code sequence WM,n2 by second data group Xn2 of a n-th block, M and n being positive integers; complex-multiplying the complex summed form of WM,n1Xn1+jWM,n2Xn2, by a complex form of WM,n3+jWM,n4 and outputting (WM,n1Xn1+jWM,n2Xn2)Ã—(WM,n3+jWM,n4) as an output signal; and summing in-phase and quadrature phase parts of the output signal outputted from a plurality of blocks as (&Sum;n=1K&it;((WM,n1&it;Xn1+jWM,n2&it;Xn2)Ã—(WM,n3+jWM,,n4))),â€ƒK is a predetermined integer greater than or equal to 1 to generate I channel and Q channel signal.