Blind speech user interference cancellation (SUIC) for high...

Details Blind speech user interference cancellation (SUIC) for high... Blind speech user interference cancellation (SUIC) for high...

2003-08-19

2009-02-17

Pathak, Sudhanshu C (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S144000, C375S147000, C375S148000, C370S335000

Reexamination Certificate

active

07492809

ABSTRACT:
This invention describes a blind speech user interference cancellation receiver for a high-speed downlink packet access (HSDPA). The key component of the blind SUIC receiver is a joint estimation on hard-decision HSDPA signals and soft-decision interfering speech user (ISU) signals with a full Walsh transform correlator used instead of the conventional RAKER, where the outputs are separated into two parts: the desired HSDPA signal with known spreading codes and the ISU signal with unknown spreading codes. The invention further describes a multistage processing for reaching a targeted convergence rate or a desired bit-error-rate for a received signal involving a hard-decision on the desired HSDPA signal and a soft-decision on the ISU signal.

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