On Downlink Beamforming Techniques for TDMA/FDD Systems

Danilo Zanatta Filho, Cristiano Magalhães Panazio, Francisco Rodrigo Porto Cavalcanti, João Marcos Travassos Romano

DOI: 10.14209/sbrt.2001.24300286

Evento: XIX Simpósio Brasileiro de Telecomunicações (SBrT2001)

Keywords:

Abstract

"The performance of three downlink beamforming techniques in a TDMA/FDD context is investigated in the present work. Two techniques based on the uplink processing are studied together with a decoupled space-time structure that provides the antenna weights. The third one is a downlink beamforming technique, based on the spatial covariance matrix, which is independent of both uplink structure and algorithm. The performance of these techniques is analyzed by simulations for some parameters like angular separation between users and angular spread. The simulation results show that the three techniques are suitable for downlink beamforming but the technique based on the spatial covariance outperforms the other two."

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