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A unifying approach to multiuser receiver design under QoS constraints

: Boche, H.; Schubert, M.; Stanczak, S.

IEEE Vehicular Technology Society -VTS-:
IEEE 61st Vehicular Technology Conference, VTC 2005 Spring. Proceedings. Vol.2 : Paving the path for a wireless future ; 30 May - 1 June 2005, Stockholm, Sweden
Piscataway, NJ: IEEE Operations Center, 2005
ISBN: 0-7803-8887-9
ISBN: 0-7803-8888-7
Vehicular Technology Conference (VTC) <61, 2005, Stockholm>
Fraunhofer HHI ()
interference suppression; iterative methods; matrix algebra; quality of service; radio receiver; radiofrequency interference

We propose a joint approach for multiuser receiver design and power allocation. Inter-user interference is modeled by an axiomatic framework, based on parameter-dependent coupling matrices. We consider the problem of total power minimization subject to QoS constraints. Properties of the optimum are discussed, and a monotone iterative algorithm is proposed. We exploit the uniqueness of the optimal power allocation in order to prove component-wise convergence of each transmit power to the global optimum. Since the QoS functions are described by an abstract model, the results can be applied to a wide range of system designs.