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The issue of non-cooperative transceiver optimization in the uplink of amultiuser wireless code division multiple access data network withwidely-linear detection at the receiver is considered. While previous work inthis area has focused on a simple real signal model, in this paper a basebandcomplex representation of the data is used, so as to properly take into accountthe I and Q components of the received signal. For the case in which thereceived signal is improper, a widely-linear reception structure, processingseparately the data and their complex conjugates, is considered. Severalnon-cooperative resource allocation games are considered for this new scenario,and the performance gains granted by the use of widely-linear detection areassessed through theoretical analysis. Numerical results confirm the validityof the theoretical findings, and show that exploiting the improper nature ofthe data in non-cooperative resource allocation brings remarkable performanceimprovements in multiuser wireless systems.

Spreading Code and Widely-Linear Receiver Design: Non-Cooperative Games for Wireless CDMA Networks