Interleaver pattern modification

Details Interleaver pattern modification Interleaver pattern modification

2007-06-12

2007-06-12

Vo, Don N. (Department: 2611)

Pulse or digital communications

Transmitters

C375S316000

Reexamination Certificate

active

10244105

ABSTRACT:
The invention provides a method of interleaving a source data stream using an interleaver pattern in a transmitter. A mother interleaver pattern and an interleaver parameter are accessed. The mother interleaver pattern is modified using said interleaver parameter. Then, the modified interleaver pattern is applied in the transmitter for interleaving the source data stream. The interleaver parameter used by the transmitter for modifying said mother interleaver pattern differs from the interleaver parameter used simultaneously by at least one other transmitter that transmits data at the same time on the same channel. The invention further provides a corresponding deinterleaving method. By decorrelating the interleaver processes in the different streams, the inter-stream interference is reduced.

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A. Elezabi, et al.: “Two-stage Detection of Coded CDMA Systems and a Novel Interleaving Scheme”, Computers and Communications, 1997, Proceedings., Second IEEE Symposium on Alexandria, Egypt, Jul. 1, 1997, pp. 551-555, XP010241412.
T. S. Wong, et al.: “Combined Coding and Successive Interference Cancellation with Random Interleaving for DS/CDMA Communications”, IEEE Vehicular Technology Conference, New York, NY, vol. 3 conf. 50, Sep. 19, 1999, pp. 1825-1829, XP000922422.

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