SPAWC 2007, 8th IEEE Workshop on Signal Processing Advances for Wireless Communications, June 17-20, 2007, Helsinki, Finland
In this contribution, we derive the optimal power allocation under target rate constraints in the case of an uplink multiuser system. Using asymptotic results based on random matrix theory, we provide a unified framework for determining the optimal decoding order when using Successive Interference Cancellation (SIC) receivers, namely the MMSE (Minimum Mean Square Error) and Matched filter SIC. Moreover, for decentralized systems, we show that each user can, under certain conditions, solely determine the power allocation based only on his channel energy and the statistics of the other users. Simulations in the case of finite systems validate the asymptotic claims.
Type:
Conférence
City:
Helsinki
Date:
2007-06-17
Department:
Systèmes de Communication
Eurecom Ref:
2224
Copyright:
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