MMSE detection of multicarrier CDMA Conference Paper

abstract

• Minimum mean-squared error (MMSE) detection of multicarrier code-division multiple-access (CDMA) signals is investigated in this paper. The theoretical performances 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 multi-carrier 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. Performance begins to degrade when the normalized Doppler rate is higher than about 1%.

authors

• Miller, Scott

published proceedings

• IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS

author list (cited authors)

• Miller, S. L., & Rainbolt, B. J.

citation count

• 65

complete list of authors

• Miller, SL||Rainbolt, BJ

publication date

• January 2000

publisher

• Institute of Electrical and Electronics Engineers (IEEE)  Publisher

published in

• IEEE Journal on Selected Areas in Communications  Journal

keywords

• Code-division Multiaccess

Digital Object Identifier (DOI)

• 10.1109/49.895040

start page

• 2356

end page

• 2362

volume

• 18

issue

• 11

URL

• http%3A%2F%2Fdx.doi.org%2F10.1109%2F49.895040