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ICASSP
2010
IEEE
13 years 7 months ago
On the outage and diversity-multiplexing tradeoff of broadcast channels with 1-bit feedback
In this paper, a single antenna downlink channel with K users is analyzed in the presence of Rayleigh flat fading. A limited channel state information (CSI) feedback scheme is co...
Bo Niu, Alexander M. Haimovich
CORR
2006
Springer
126views Education» more  CORR 2006»
13 years 7 months ago
Power Control for User Cooperation
For a fading Gaussian multiple access channel with user cooperation, we obtain the optimal power allocation policies that maximize the rates achievable by block Markov superpositi...
Onur Kaya, Sennur Ulukus
CORR
2004
Springer
115views Education» more  CORR 2004»
13 years 7 months ago
Bounds on the decoding complexity of punctured codes on graphs
We present two sequences of ensembles of non-systematic irregular repeat-accumulate codes which asymptotically (as their block length tends to infinity) achieve capacity on the bi...
Henry D. Pfister, Igal Sason, Rüdiger L. Urba...
JSAC
2007
117views more  JSAC 2007»
13 years 7 months ago
Optimization of Training and Scheduling in the Non-Coherent SIMO Multiple Access Channel
— Channel state information (CSI) is important for achieving large rates in MIMO channels. However, in timevarying MIMO channels, there is a tradeoff between the time/energy spen...
Sugumar Murugesan, Elif Uysal-Biyikoglu, Philip Sc...
GLOBECOM
2009
IEEE
14 years 2 months ago
Hybrid Pilot/Quantization Based Feedback in Multi-Antenna TDD Systems
— The communication between a multiple-antenna transmitter and multiple receivers (users) with either a single or multiple-antenna each can be significantly enhanced by providin...
Umer Salim, David Gesbert, Dirk T. M. Slock, Zafer...