A framework for opportunistic scheduling in wireless networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
Two-Dimensional Pilot-Symbol-Aided Channel Estimation by Wiener Filtering
ICASSP '97 Proceedings of the 1997 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP '97)-Volume 3 - Volume 3
Introduction to Space-Time Wireless Communications
Introduction to Space-Time Wireless Communications
MIMO minimum total MSE transceiver design with imperfect CSI at both ends
IEEE Transactions on Signal Processing
On downlink network MIMO under a constrained backhaul and imperfect channel knowledge
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Channel Sounding with Partial Channel Information in the Uplink of OFDM-Based Wireless Systems
Wireless Personal Communications: An International Journal
Adaptive downlink multi-user MIMO wireless systems for correlated channels with imperfect CSI
IEEE Transactions on Wireless Communications
On the performance of random vector quantization limited feedback beamforming in a MISO system
IEEE Transactions on Wireless Communications
Opportunistic beamforming using dumb antennas
IEEE Transactions on Information Theory
Grassmannian beamforming for multiple-input multiple-output wireless systems
IEEE Transactions on Information Theory
A model for the multipath delay profile of fixed wireless channels
IEEE Journal on Selected Areas in Communications
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In this paper, we consider uplink channel sounding in time division duplex (TDD) orthogonal frequency division multiplexing (OFDM)-based cellular systems. The channel information provided by uplink sounding may be necessary to exploit closed loop transmission techniques in TDD-OFDM systems. However, conventional sounding schemes may suffer from large sounding overhead, significantly restricting the number of sounding users due to the resource shortage. To reduce the sounding overhead, the proposed scheme transmits sounding signal only through subchannels which are not highly correlated to each other. The whole channel information can be estimated from the partial one by exploiting the channel correlation in the frequency domain. Thus, the proposed scheme allows a larger number of users to transmit the sounding signal, while making the base station employ closed loop transmission techniques with the use of whole channel information. Finally, simulation results show that the proposed scheme noticeably improves the performance over conventional schemes in the presence of channel correlation.