Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Probabilistically constrained robust power allocation in downlink multiuser MISO systems

: Vucic, N.; Boche, H.


Matthews, M.B. ; Naval Postgraduate School -NPS-, Monterey/Calif.; IEEE Signal Processing Society:
42nd Asilomar Conference on Signals, Systems and Computers 2008. Proceedings. Vol.2 : Pacific Grove, California, USA, 26 - 29 October 2008
Piscataway, NJ: IEEE, 2008
ISBN: 978-1-4244-2940-0
ISBN: 978-1-4244-2941-7
Asilomar Conference on Signals, Systems and Computers <42, 2008, Pacific Grove/Calif.>
Fraunhofer HHI ()
multiuser channel; probability; quality of service; radio link

We consider the problem of robust power control in a downlink system. The base station (BS) is equipped with an antenna array and users have single antennas. The robustness addresses the problem of imperfect channel state information (CSI) at the BS. The CSI mismatch is assumed to be Gaussian. An algorithm for robust power allocation is designed to minimize the total transmit power while simultaneously satisfying predefined users' quality-of-service targets with certain probabilities. The solution is found to be significantly less conservative comparing to the strategies based on worst-case optimization.