Transmitter waveform and widely linear receiver design: noncooperative games for wireless multiple-access networks

Authors:
Stefano Buzzi;H. Vincent Poor;Alessio Zappone
Affiliations:
DAEIMI, University of Cassino, Cassino, FR, Italy;DAEIMI, University of Cassino, Cassino, FR, Italy;Department of Electrical Engineering and the School of Engineering and Applied Science, Princeton University, Princeton, NJ
Venue:
IEEE Transactions on Information Theory
Year:
2010

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Abstract

The issue of noncooperative transceiver optimization in the uplink of a multiuser wireless code division multiple access data network with widely linear detection at the receiver is considered. While previous work in this area has focused on a simple real signal model, in this paper, a baseband complex representation of the data is used so as to properly take into account the I and Q components of the received signal. For the case in which the received signal is improper, a widely linear reception structure, processing separately the data and their complex conjugates, is considered. Several noncooperative resource allocation games are considered for this new scenario, and the performance gains granted by the use of widely linear detection are assessed through theoretical analysis. Numerical results confirm the validity of the theoretical findings and show that exploiting the improper nature of the data in noncooperative resource allocation brings remarkable performance improvements in multiuser wireless systems.