Title :
Multiuser Mercury/waterfilling for Downlink OFDM with Arbitrary Signal Constellations
Author :
Lozano, Angel ; Tulino, Antonia M. ; VerdÙ, Sergio
Author_Institution :
Lucent Technol. Bell Labs, Holmdel, NJ
Abstract :
This paper formulates the power allocation policy that maximizes the region of mutual informations achievable in multiuser downlink OFDM channels. Arbitrary partitioning of the available tones among users and arbitrary modulation formats, possibly different for every user, are considered. The policy, derived for slowly fading channels tracked by the base station, adopts the form of a multiuser mercury/waterfilling procedure that generalizes the single-user mercury/waterfilling
Keywords :
OFDM modulation; fading channels; multiuser channels; arbitrary modulation format; base station; fading channel; multiuser downlink OFDM channel; multiuser mercury-waterfilling procedure; orthogonal frequency division multiplexing; power allocation policy; signal constellation; Bandwidth; Base stations; Constellation diagram; Downlink; Fading; Gaussian noise; Modulation; Mutual information; OFDM; USA Councils;
Conference_Titel :
Spread Spectrum Techniques and Applications, 2006 IEEE Ninth International Symposium on
Conference_Location :
Manaus-Amazon
Print_ISBN :
0-7803-9779-7
Electronic_ISBN :
0-7803-9780-0
DOI :
10.1109/ISSSTA.2006.311781
