Pulse or digital communications – Spread spectrum – Direct sequence
Reissue Patent
2008-06-17
2008-06-17
Burd, Kevin (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S146000, C375S298000
Reissue Patent
active
RE040385
ABSTRACT:
An orthogonal complex spreading method for a multichannel and an apparatus thereof are disclosed. The method includes the steps of complex-summing αn1WM,n1Xn1which is obtained by multiplying an orthogonal Hadamard sequence WM,n1by a first data Xn1of a n-th block and αn2WM,n2Xn2which is obtained by multiplying an orthogonal Hadamard sequence W1,n2by a second data Xn2of a n-th block; complex-multiplying αn1WM,n1Xn1+jαn2WM,n2Xn2which is summed in the complex type and WM,n3+jPWM,n4of 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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Bang Seung-Chan
Han Ki-Chul
Kim Jung-im
Kim Tae-Joong
Shim Jae-Ryong
Burd Kevin
Electronics and Telecom Research Institute
Hunton & Williams LLP
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