Apparatus and method for improved performance in radio...

Details Apparatus and method for improved performance in radio... Apparatus and method for improved performance in radio...

2003-12-22

2008-07-15

Corrielus, Jean B. (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

C375S295000, C375S316000

Reexamination Certificate

active

07400686

ABSTRACT:
A apparatus and method for improved performance in radio telecommunications systems, and in particular multi-carrier code division multiple access (MC-CDMA) networks that employ pulse-shaping filters on the transmit side of a radio link. In order to more accurately transmit a radio signal bearing a symbol sequence, the modulated and spread information stream is upsampled using a technique that involves inserting zeros in the frequency domain. A corresponding downsampling procedure on the receive side permits reconstruction of the transmitted symbols. A new channel estimation algorithm may also be used, and the improved channel estimation advantageously employed to obtain more faithful symbol detection.

REFERENCES:
patent: 5487069 (1996-01-01), O'Sullivan et al.
patent: 6944120 (2005-09-01), Wu et al.
patent: 2002/0136276 (2002-09-01), Franceschini et al.

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