On Multirate DS-CDMA Schemes with Interference Cancellation

Authors:
Ann-Louise Johansson;Arne Svensson
Affiliations:
Department of Signals and Systems, Chalmers University of Technology, S-412 96 Gothenburg, Sweden E-mail: anne.johansson@s2.chalmers.se and arne.svensson@s2.chalmers.se;Department of Signals and Systems, Chalmers University of Technology, S-412 96 Gothenburg, Sweden E-mail: anne.johansson@s2.chalmers.se and arne.svensson@s2.chalmers.se
Venue:
Wireless Personal Communications: An International Journal
Year:
1999

Citing 5
Cited 1

Minimum probability of error for asynchronous Gaussian multiple-access channels

IEEE Transactions on Information Theory
On Schemes for Multriate Support in DS-CDMA Systems

Wireless Personal Communications: An International Journal
Decorrelating Detectors for a Dual Rate Synchronous DS/CDMA System

Wireless Personal Communications: An International Journal
Analysis of Successive Interference Cancellation in M-ary Orthogonal DS-CDMA System with Single Path Rayleigh Fading

Proceedings of the 1994 International Zurich Seminar on Digital Communications: Mobile Communications: Advanced Systems and Components
Experiments on pilot symbol-assisted coherent multistage interference canceller for DS-CDMA mobile radio

IEEE Journal on Selected Areas in Communications

A Low Complexity Downlink Beamforming Scheme for DS-CDMA System

Wireless Personal Communications: An International Journal

Quantified Score

Hi-index	0.01

Visualization

Abstract

This paper investigates interference cancellation (IC) indirect-sequence code-division multiple access (DS-CDMA) systems that supportmultiple data rates. Two methods for implementing multiple data rates areconsidered. One is the use of mixed modulation and the other is the use ofmulticodes. We introduce and analyze a new approach that combines thesemultiple data rate systems with IC. The cancellation in the receiver isperformed successively on each user, starting with the user received withthe highest power. This procedure can in turn be iterated, forming amultistage scheme, with the number of iterations set as a design parameter.Our analysis employs a Gaussian approximation for the distribution of theinterference, and it includes both the AWGN and the flat Rayleigh fadingchannel. The systems are also evaluated via computer simulations. Ouranalysis and simulations indicate that the IC schemes used in mixedmodulation or multicode systems yield a performance close to the single BPSKuser bound and, consequently, give a prospect of a considerable improvementin performance compared to systems employing matched filter detectors.