Research Article
Widely-linear filtering and non-cooperative transceiver optimization in wireless data networks
@INPROCEEDINGS{10.1109/GAMENETS.2009.5137408, author={Stefano Buzz and Vincent Poor and Alessio Zappone}, title={Widely-linear filtering and non-cooperative transceiver optimization in wireless data networks}, proceedings={1st International Conference on Game Theory for Networks}, publisher={IEEE}, proceedings_a={GAMENETS}, year={2009}, month={6}, keywords={}, doi={10.1109/GAMENETS.2009.5137408} }- Stefano Buzz
Vincent Poor
Alessio Zappone
Year: 2009
Widely-linear filtering and non-cooperative transceiver optimization in wireless data networks
GAMENETS
IEEE
DOI: 10.1109/GAMENETS.2009.5137408
Abstract
The issue of non-cooperative transceiver optimization in the uplink of a multiuser wireless data network with widely linear detection at the receiver is considered in this paper. 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. The convergence of the well-known minimum mean square error (MMSE) iteration for spreading code adaptation is studied for the case in which widely-linear detection is used at the receiver. Interestingly, it is also found that spreading code optimization coupled with widely-linear filtering permits supporting, with no multiuser interference, a number of users that is twice the processing gain. Numerical results corroborate the validity of the theoretical analysis, and show that exploiting the improper nature of the data in non-cooperative resource allocation brings remarkable performance improvements in multiuser wireless systems.
