Wireless communications systems and methods for cache...

Details Wireless communications systems and methods for cache... Wireless communications systems and methods for cache...

2008-05-20

2008-05-20

Ghayour, Mohammed (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S148000, C375S316000, C711S118000, C711S149000, C071S022000

Reexamination Certificate

active

10291176

ABSTRACT:
The invention provides methods and apparatus for multiple user detection (MUD) processing. One aspect of the invention provides a multiprocessor, multiuser detection system for detecting user transmitted symbols in CDMA short-code spectrum waveforms. A first processing element generates a matrix (hereinafter, “gamma matrix”) that represents a correlation between a short-code associated with one user and those associated with one or more other users. A set of second processing elements generates, e.g., from the gamma matrix, a matrix (hereinafter, “R-matrix”) that represents cross-correlations among user waveforms based on their amplitudes and time lags. A third processing element produces estimates of the user transmitted symbols as a function of the R-matrix.

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