Fast frequency hopping with a code division multiplexed pilot in an OFDMA system

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United States of America Patent

PATENT NO 8102832
APP PUB NO 20070211790A1
SERIAL NO

11614470

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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Techniques are provided to support fast frequency hopping with a code division multiplexed (CDM) pilot in a multi-carrier communication system (e.g., an OFDMA system). Each transmitter (e.g., each terminal) in the system transmits a wideband pilot on all subbands to allow a receiver (e.g., a base station) to estimate the entire channel response at the same time. The wideband pilot for each transmitter may be generated using direct sequence spread spectrum processing and based on a pseudo-random number (PN) code assigned to that transmitter. This allows the receiver to individually identify and recover multiple wideband pilots transmitted concurrently by multiple transmitters. For a time division multiplexed (TDM)/CDM pilot transmission scheme, each transmitter transmits the wideband pilot in bursts. For a continuous CDM pilot transmission scheme, each transmitter continuously transmits the wideband pilot, albeit at a low transmit power level. Any frequency hopping rate may be supported without impacting pilot overhead.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
QUALCOMM INCORPORATEDSAN DIEGO, CA21048

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Agrawal, Avneesh San Diego, US 260 8336
Teague, Edward Harrison San Diego, US 97 2596

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