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dc.contributor.authorChang, Wen-Thongen_US
dc.contributor.authorChang, Chi-Weien_US
dc.date.accessioned2014-12-08T15:24:57Z-
dc.date.available2014-12-08T15:24:57Z-
dc.date.issued2006en_US
dc.identifier.isbn978-0-7803-9732-3en_US
dc.identifier.urihttp://hdl.handle.net/11536/17319-
dc.description.abstractAn adaptive subcarrier assignment and bit loading strategy for multiple users in an orthogonal-frequency division multiplexing-based wireless systern is considered. Based on the channel condition for each user, the algorithm minimizes the system total transmit power while satisfying each user's transmission rate constraint under a given bit error rate requirement. The minimization is attained by an optimal weighting for each user during the compete for the subcarrier. The problem of joint allocation is divided into two steps. First subcarrier assignment based on channel condition is performed. After that, the modulation level on each subcarrier is determined. Both the carrier assignment and bit allocation are iteratively adjusted by properly adjusting the weighting factor for each user until all the transmit constraints for all the users are satisfied. The purpose of such iteration is to ensure that total system power is minimized. During the iterative search, efficient estimation of the weighting factor is proposed.en_US
dc.language.isoen_USen_US
dc.titleComputationally efficient algorithm for sub-carrier, bit, and power allocationen_US
dc.typeProceedings Paperen_US
dc.identifier.journal2006 INTERNATIONAL SYMPOSIUM ON INTELLIGENT SIGNAL PROCESSING AND COMMUNICATIONS, VOLS 1 AND 2en_US
dc.citation.spage593en_US
dc.citation.epage596en_US
dc.contributor.department電信工程研究所zh_TW
dc.contributor.departmentInstitute of Communications Engineeringen_US
dc.identifier.wosnumberWOS:000246984700148-
Appears in Collections:Conferences Paper