US Patent Application No: 2001/0015,994

Number of patents in Portfolio can not be more than 2000

Communication system and a transmitter for use in the system

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Abstract

A communication system comprises a wireless local area network (LAN) formed by a plurality of spacially separated transceivers (TR, TR'). Each of the transceivers has a transmitting section (10) for transmitting data by a combination of dual code spread spectrum techniques with transmit diversity. More particularly an input data stream is split into quadrature related channels (I,Q). Each of the channels comprises a frequency up-converter (42, 44, 46), a spread spectrum stage (50, 52) for spreading the up-converted channel signal by a respective one of two parallel produced PN codes (PN1, PN2) and an antenna (18, 20) for propagating its respective spread spectrum signal, the antennas (18, 20) being located where convenient in the coverage area of the respective transmitting section.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
U.S. PHILIPS CORPORATIONNEW YORK, NY11382

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Nam, Sueng-il New Malden, GB 5 38

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
IPR LICENSING, INC. (19)
6,785,520 System and method for antenna diversity using equal power joint maximal ratio combining 55 2002
6,687,492 System and method for antenna diversity using joint maximal ratio combining 100 2002
6,873,651 System and method for joint maximal ratio combining using time-domain signal processing 47 2002
6,728,517 Multiple-input multiple-output radio transceiver 97 2002
7,194,237 System and method for multiple-input multiple-output (MIMO) radio communication 49 2003
6,965,762 System and method for antenna diversity using joint maximal ratio combining 40 2003
7,573,945 System and method for joint maximal ratio combining using time-domain based signal processing 5 2003
7,636,554 Multiple-input multiple-output radio transceiver 9 2004
7,099,678 System and method for transmit weight computation for vector beamforming radio communication 35 2004
7,079,870 Compensation techniques for group delay effects in transmit beamforming radio communication 11 2004
7,245,881 System and method for antenna diversity using equal power joint maximal ratio combining 2 2004
7,570,921 Systems and methods for improving range for multicast wireless communication 2 2004
6,993,299 Efficiency of power amplifiers in devices using transmit beamforming 8 2004
7,545,778 Apparatus for antenna diversity using joint maximal ratio combining 11 2005
7,565,117 Control of power amplifiers in devices using transmit beamforming 2 2006
7,308,287 Compensation techniques for group delay effects in transmit beamforming radio communication 1 2006
7,881,674 System and method for antenna diversity using equal power joint maximal ratio combining 1 2007
7,899,414 Control of power amplifiers in devices using transmit beamforming 1 2009
8,463,199 Multiple-input multiple-output radio transceiver 0 2009