DYNAMIC SUBCHANNEL AND BIT ALLOCATION IN MULTIUSER MIMO/OFDMA SYSTEM

摘要

In a 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. One or more subchannels is allocated to each user according to the number of subchannels for each user. A modulation scheme for each of the 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.