Multi-Carrier and Spread Spectrum Systems
Multi-Carrier and Spread Spectrum Systems
EURASIP Journal on Wireless Communications and Networking - Multicarrier Systems
Performance of adaptive MC-CDMA detectors in rapidly fading Rayleigh channels
IEEE Transactions on Wireless Communications
On the down-link performance of multi-carrier CDMA systems with partial equalization
IEEE Transactions on Wireless Communications
Antenna subset diversity with non-ideal channel estimation
IEEE Transactions on Wireless Communications - Part 1
An empirically based path loss model for wireless channels in suburban environments
IEEE Journal on Selected Areas in Communications
Channel estimation for MC-CDMA uplink transmissions with combined equalization
IEEE Journal on Selected Areas in Communications
MACOM'10 Proceedings of the Third international conference on Multiple access communications
| Hi-index | 0.00 |
Multi carrier code-division multiple access (MC-CDMA) is considered for beyond third generation wireless systems for its effectiveness in the presence of both multipath fading and interference. This paper analyzes MC-CDMA systems adopting an adaptive detection technique based on threshold orthogonality restoring combining (TORC). The mathematical framework here developed allows the evaluation of both the bit error probability and the bit error outage in downlink with perfect and imperfect channel state information and the derivation of the TORC threshold that optimizes the performance. The optimal threshold is analytically derived as a function of the number of subcarriers, the number of active users, and the mean signal-to-noise ratio. This enables an adaptive variation of the threshold following slow processes fluctuations. Numerical results show very good performance of TORC with optimal threshold comparing with others combining techniques with perfect and imperfect channel estimation. Results are shown both in uncorrelated Rayleigh fading as well as in time and frequency correlated fading channels.