Blind direct multiuser detection for uplink MC-CDMA: performance analysis and robust implementation
EURASIP Journal on Wireless Communications and Networking - Special issue on innovative signal transmission and detection techniques for next generation cellular CDMA systems
Generalized multicarrier CDMA: unification and linear equalization
EURASIP Journal on Applied Signal Processing
Secured communication over frequency-selective fading channels: a practical vandermonde precoding
EURASIP Journal on Wireless Communications and Networking - Special issue on wireless physical layer security
Interference-free code design for MC-CDMA uplink transmissions
IEEE Transactions on Wireless Communications
| Hi-index | 35.68 |
A family of codes for low-complexity quasi-synchronous code division multiple access (CDMA) systems is developed in order to eliminate multiuser interference (MUI) completely in the presence of unknown and even rapidly varying multipath. Judiciously designed precomputable symbol-periodic user codes, which we term Lagrange or Vandermonde, and the corresponding linear receivers offer a generalization of orthogonal frequency division multiplexing (OFDM), which are especially valuable when deep-fading, carrier frequency errors, and Doppler effects are present. The flexibility inherent to the designed transceivers is exploited to derive transmission strategies that cope with major impairments of wireless CDMA channels. The symbol-periodic code design is also generalized to include the class of aperiodic spreading and orthogonal multirate codes for variable bit rate users. Performance analysis and simulations results illustrate the advantages of the proposed scheme over competing alternatives