Wireless communication systems and methods for long-code...

Details Wireless communication systems and methods for long-code... Wireless communication systems and methods for long-code...

2006-11-21

2006-11-21

Ghebretinsae, Temesghen (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S144000, C375S143000, C375S152000

Reexamination Certificate

active

07139306

ABSTRACT:
The invention provides improved CDMA, WCDMA (UTMS) or other spread spectrum communication systems of the type that processes one or more spread-spectrum waveforms, each representative of a waveform received from a respective user (or other transmitting device). The improvement is characterized by a first logic element that generates a residual composite spread-spectrum waveform as a function of an arithmetic difference between a composite spread-spectrum waveform for all users (or other transmitters) and an estimated spread-spectrum waveform for each user. It is further characterized by one or more second logic elements that generate, for at least a selected user (or other transmitter), a refined spread-spectrum waveform as a function of a sum of the residual composite spread-spectrum waveform and the estimated spread-spectrum waveform for that user.

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