부산대학교 도서관

A novel multi-user diversity scheme for OFDMA (Orthogonal Frequency Division Multiplexing Access) is described which alleviates the need of feedback and provides substantial improvements in non-cooperative environments. The algorithm exploits the reciprocity of the channel and enables a user to send reliably data at a prescribed rate knowing only its channel. Moreover, analytical expressions of the cell spectral efficiency are derived in the asymptotic regime (high number of carriers) for two filter types: matched filter and optimum filter. Discussions are also provided for various channel models.