Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2006-08-29
2006-08-29
Ghayour, Mohammed (Department: 2634)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S346000
Reexamination Certificate
active
07099378
ABSTRACT:
Reduction of multiple access interference, in one example for asynchronous CDMA systems using long codes. In one aspect, parallel interference cancellation (PIC) implements a decoupled estimate, preferably non-linear and applied at chip intervals. According to another aspect, interference is cancelled using a technique that estimates bits for a symbol by interpolating signature waveforms for users to a common sampling lattice of the received data. According to another aspect, multi-stage, hybrid multi-stage, and reconfigurable recursive multi-stage multi-user detection architectures and corresponding processes are provided.
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Dunyak James P.
Fite John D.
Shapiro Jerome M.
Ghayour Mohammed
Odom Curtis
Rader,Fishman & Grauer, PLLC
The MITRE Corporation
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