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

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 8102832
APP PUB NO 20070211790A1
SERIAL NO

11614470

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ATTORNEY / AGENT: (SPONSORED)

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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, CA20902

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Agrawal, Avneesh San Diego, US 255 7665
Teague, Edward Harrison San Diego, US 88 2436

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Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
QUALCOMM INCORPORATED (10)
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