Multicarrier multiple access is sum-rate optimal for block transmissions over circulant ISI channels
JSAC_24_1256.pdf 300 KB
Giannakis, Georgios B.
Multicarrier multiple access with channel knowledge and prescribed power at the transmitters is shown to maximize the sum-rate for circulant intersymbol-interference (ISI) channels. A low-complexity iterative algorithm is derived for optimal subcarrier allocation to multiple users, while power is loaded per user by specializing an existing iterative algorithm to circulant ISI channels. It is analytically shown that each subcarrier should be allocated to the user having relatively better subcarrier gain and that different users may share certain subcarriers.
IEEE Journal on Selected Areas in Communications
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Graduate School of Engineering