Fausto Bernardini, Holly Rushmeier
Proceedings of SPIE - The International Society for Optical Engineering
The downlink capacity tends to be the limiting factor in future communications systems. In this paper, we propose two schemes for the downlink of code-division multiple-access systems that help reduce the multiuser interference by jointly preceding the transmitted signal based on knowledge of the downlink channel. Methods that operate on blocks of bits will be first developed and a bitwise simplification of these for systems with large processing gains will be derived. The use of multiple transmit antennas will also be considered. These methods provide a substantial capacity increase without requiring complex multiuser detectors at the mo bile terminals, and can be applied for instance to time-division du plex systems, which have reciprocal channels.
Fausto Bernardini, Holly Rushmeier
Proceedings of SPIE - The International Society for Optical Engineering
R.B. Morris, Y. Tsuji, et al.
International Journal for Numerical Methods in Engineering
Martin Charles Golumbic, Renu C. Laskar
Discrete Applied Mathematics
M.B. Small, R.M. Potemski
Proceedings of SPIE 1989