Method and apparatus for predicting a signalling code...

Details Method and apparatus for predicting a signalling code... Method and apparatus for predicting a signalling code...

2003-09-23

2009-02-24

Liu, Shuwang (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S295000, C375S296000

Reexamination Certificate

active

07496130

ABSTRACT:
The existence of non-linearities in a spread-spectrum communications system can result in a transmitter generating code spurs projecting onto channels used to communicate information symbols between a transmitter and a receiver. The present invention provides a method of predicting at least one signalling code corresponding to at least one respective code spur by performing vector products of signalling codes expressed in a bipolar form to yield a signalling code where a code spur will occur.

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patent: 2002/0172264 (2002-11-01), Wiberg et al.
patent: WO 99/59265 (1999-11-01), None
patent: WO 01/18987 (2001-03-01), None
“Nonlinear Amplification of CDMA Waveforms: An Analysis Of Power Amplifier Gain Errors And Spectral Regrowth”, Braithwaite, Vehicular Technology Conference, 1998, IEEE, pp. 2160-2166.
“Peak-To-Average Ratio (PAR) Reduction By Walsh-Code Selection For IS-95 And CDMA2000 Systems”, Lau, IEE Proceedings: Communications, Institution of Electrical Engineers, vol. 147, No. 6, pp. 361-364.
“Submission Of Composite Rho Proposal To 3GPP RAN WG4”, Hewlett Packard Ltd., 3GPP TSG RAN WG4 ′Online!, 1999, pp. 1-17.

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