LMMSE-based RAKE receiver with channel tap assignment

Details LMMSE-based RAKE receiver with channel tap assignment LMMSE-based RAKE receiver with channel tap assignment

2007-12-18

2007-12-18

Payne, David C. (Department: 2611)

Pulse or digital communications

Receivers

Interference or noise reduction

C370S320000, C370S335000, C370S342000, C370S441000, C375S130000, C375S144000, C375S148000, C375S150000, C375S343000, C455S137000

Reexamination Certificate

active

10754340

ABSTRACT:
Methods of recovering data in a received signal sent in a communications media are disclosed. Composite channel impulse responses are first estimated. Channel-tap locations are then assigned to suppress the interference noises by sequential search schemes or heuristic search schemes based on estimated composite channel impulse responses. A sequential search scheme optimizes a predetermined design criterion in a sequential manner. Also described are recursive evaluations of the design criterion and the inverses of the noise covariance matrices based on the composite channel impulse response during a sequential search. A heuristic search scheme selects channel-tap locations based on a set of pre-selected channel-tap locations. The set of pre-selected channel-tap locations is determined according to the estimated composite channel impulse response. A method of estimating energy levels of known interference sources is also described.

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