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Communication Dans Un Congrès Année : 2013

A novel zero-forcing transmit data scheme for multiuser MIMO broadcast channel

Résumé

The sum rate maximization in the multiuser MIMO broadcast channel is investigated in this paper. Because of higher computational complexity of non-linear Dirty Paper Coding (DPC), linear approaches are often used instead. Even through transmit and receive beamforming optimizations are still nonconvex problems in general case. For the scenario where the number of transmit antennas is larger than the users' antennas in sum, substantial techniques such as BD or channel inverse have been proposed. In this paper, we consider the scenario where the sum number of receive antennas is much more than the number of the transmit antennas under the zero-forcing constraint. It is shown that the optimal data stream allocation needs exhaustive search over all possibilities, and the complexity is significantly high. We propose a greedy transmit data allocation scheme that allocates one data stream at each step, and the corresponding transmit and receive beamforming vectors are designed to optimize the sum rate. Simulation results show that the proposed method outperforms the methods in the literature.
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Dates et versions

hal-00805827 , version 1 (29-03-2013)

Identifiants

  • HAL Id : hal-00805827 , version 1

Citer

Lei Zhao, Pascal Charge, Yide Wang. A novel zero-forcing transmit data scheme for multiuser MIMO broadcast channel. SIFWICT 2013, Jun 2013, Guangzhou, China. 8 p. ⟨hal-00805827⟩
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