Title:
METHOD AND APPARATUS FOR SELECTING CDM OR OFDM IN A COMMUNICATION SYSTEM
Document Type and Number:
WIPO Patent Application WO2007098482
Kind Code:
A9
Abstract:
Techniques for efficiently sending data in a wireless communication system are described. Code division multiplexing (CDM) or orthogonal frequency division multiplexing (OFDM) may be selected for each traffic segment, which may correspond to specific time frequency resources. An output waveform comprised of traffic and overhead segments may be generated. Each traffic segment may carry CDM data at a chip rate if CDM is selected or OFDM data if OFDM is selected. OFDM symbols may be generated at a sample rate that may be an integer ratio of the chip rate and may have a duration that may be determined based on the traffic segment duration. The output waveform may carry CDM data and/or OFDM data on subcarriers corresponding to at least one carrier in a spectral allocation and may further carry OFDM data on remaining usable subcarriers in the spectral allocation.
Inventors:
BHUSHAN NAGA (US)
GOROKHOV ALEXEI (US)
GOROKHOV ALEXEI (US)
Application Number:
PCT/US2007/062526
Publication Date:
October 16, 2008
Filing Date:
February 21, 2007
Export Citation:
Assignee:
QUALCOMM INC (US)
BHUSHAN NAGA (US)
GOROKHOV ALEXEI (US)
BHUSHAN NAGA (US)
GOROKHOV ALEXEI (US)
International Classes:
H04L5/02; H04B1/707; H04J13/00; H04L27/26
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