Pulse or digital communications – Spread spectrum – Direct sequence
Patent
1999-06-10
2000-07-18
Tse, Young T.
Pulse or digital communications
Spread spectrum
Direct sequence
370208, 370342, H04B 7216
Patent
active
060917601
ABSTRACT:
A method and apparatus for constructing a series of PN code sets that can be used for multirate synchronous and quasi-synchronous CDMA systems. The construction technique produces PN codes that are balanced, and that furthermore do not require any synchronization of neighboring base stations. The method is a non-recursive method that uses a permuted orthogonal matrix to modulate permuted orthogonal matrices to create PN codes that support multirate operation. Furthermore, the codes constructed using the method have very good spectral properties (if chosen properly) when the code length, n, is reasonably large.
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Butterfield Lee A
Giallorenzi Thomas R
Kingston Samuel C
Lundquist Alan E
Nieczyporowicz Leon L
L-3 Communications Corporation
Tse Young T.
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