Dynamic subchannel and bit allocation in a...

Details Dynamic subchannel and bit allocation in a... Dynamic subchannel and bit allocation in a...

2008-05-13

2008-05-13

Zewdu, Meless (Department: 2617)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C370S319000, C370S329000, C370S334000, C370S341000, C370S344000, C370S338000, C455S101000, C455S550100, C455S561000, C375S347000

Reexamination Certificate

active

07372830

ABSTRACT:
A resource allocation method in a multiuser-multiple-input multiple-output/orthogonal frequency division multiple access (MIMO/OFDMA) system. In the multiuser-MIMO/OFDMA system feedback information is received from terminals. A channel gain and a transmission rate for each user are determined using the feedback information. An average channel gain for each user is computed according to the channel gain. The average number of bits for each user is determined according to the average channel gain. The number of subchannels for each user is computed according to the average number of bits for each user. At least one subchannel is allocated to each user according to the number of subchannels for each user. A modulation scheme for each of the at least one subchannel is determined. The resource allocation method adaptively allocates subchannels and bits according to channel environment, thereby considerably improving frequency use efficiency as well as a power gain.

REFERENCES:
patent: 7020110 (2006-03-01), Walton et al.
patent: 7099678 (2006-08-01), Vaidyanathan
patent: 7116725 (2006-10-01), Ketchum et al.
patent: 2004/0120347 (2004-06-01), Lee et al.

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