MMSE detection of multicarrier CDMA
- 1 November 2000
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Journal on Selected Areas in Communications
- Vol. 18 (11) , 2356-2362
- https://doi.org/10.1109/49.895040
Abstract
Minimum mean-squared error (MMSE) detection of multicarrier code-division multiple-access (CDMA) signals is investigated. The theoretical performance of two different design strategies for MMSE detection are compared. In one case, the MMSE filters are designed separately for each carrier, while in the other case the optimization of the filters is done jointly. Naturally, the joint optimization produces a better receiver, but the difference in performance is shown to be substantial. The multicarrier CDMA performance is then compared to that of a single-carrier CDMA system on a frequency-selective fading channel. A mechanism is then developed to track the channel fading parameters for all the users' signals so that joint optimization of the receiver filters is possible in a time-varying channel. Simulation results show that the performance of this receiver is close to ideal theoretical results for moderate vehicle speeds. The performance begins to degrade when the normalized Doppler rate is higher than about 1%.Keywords
This publication has 9 references indexed in Scilit:
- Wiener filtering of multi-carrier CDMA in Rayleigh fading channelPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Performance of adaptive linear interference suppression in the presence of dynamic fadingIEEE Transactions on Communications, 2001
- Performance analysis of MMSE receivers for DS-CDMA in frequency-selective fading channelsIEEE Transactions on Communications, 2000
- Large system performance of linear multiuser receivers in multipath fading channelsIEEE Transactions on Information Theory, 2000
- Blind adaptive signal reception for MC-CDMA systems in Rayleigh fading channelsIEEE Transactions on Communications, 1999
- Blind multiuser detection: a subspace approachIEEE Transactions on Information Theory, 1998
- Adaptive detection of DS/CDMA signals in fading channelsIEEE Transactions on Communications, 1998
- Performance of multicarrier DS CDMA systemsIEEE Transactions on Communications, 1996
- A linear minimum mean square error multiuser receiver in Rayleigh-fading channelsIEEE Journal on Selected Areas in Communications, 1996