Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Reexamination Certificate
2006-05-23
2010-10-12
Eng, George (Department: 2617)
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
C370S267000, C375S347000
Reexamination Certificate
active
07813313
ABSTRACT:
Embodiments of the present invention provides a MIMO communication system based on random beamforming and its user scheduling method. The system includes: a transmitter that is used to transmit the data frame including at least the channel estimation signal and the user data; and at least one receiver that is used to receive the data frame from the transmitter and to produce the corresponding feedback information and recover the user data. The transmitter produces the scheduling information according to the feedback signal and utilizes the scheduling information to implement adaptive user scheduling. The scheduling information includes the scheduled users, data streams that should be supported by each scheduled user and the transmit beam adopted by each data stream. Embodiments of the present system can schedule the users with fixed number or adaptively according to the instant channel condition as well as different feedback information so that the intelligence of the system control and communication stability can be improved to approach the maximum system capacity.
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Viswanath, Pramod, et al., “Opportunistic Beamforming Using Dumb Antennas”, IEEE Transactions on Information Theory, Jun. 2002, pp. 1277-1294, vol. 48, No. 6.
Laroia, Rajiv, et al., “Enhanced Opportunistic Beamforming”, IEEE VTC2003, Oct. 2003, pp. 1762-1766, vol. 3.
Chung, Jaehak, et al., “A Random Beamforming Technique in MIMO Systems Exploiting Multiuser Diversity”, IEEE Journal on Selected Areas in Communications, Jun. 2003, pp. 848-855, vol. 21, No. 5.
Chen Lan
Pan Zhengang
Blakely , Sokoloff, Taylor & Zafman LLP
Eng George
Manoharan Muthuswamy G
NTT DoCoMo Inc.
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