Proceedings ArticleDOI
On fading broadcast channels with partial channel state information at the transmitter
Ravi Tandon,Mohammad Ali Maddah-Ali,Antonia M. Tulino,H. Vincent Poor,Shlomo Shamai +4 more
- pp 1004-1008
TLDR
The scheme illustrates the joint utilization of current and past knowledge of the channel state information at the transmitter, and the degrees of freedom (DoF) region of the two-user - MIMO broadcast channel under this model is completely characterized.Abstract:
The two user multiple-input multiple-output (MIMO) broadcast channel is studied in which the channel from one of the receivers is known instantaneously and perfectly at the transmitter, whereas the channel from the other receiver is known in a delayed manner. The degrees of freedom (DoF) region of the two-user (M; N 1 ; N 2 ) - MIMO broadcast channel under this model is completely characterized. The scheme illustrates the joint utilization of current and past knowledge of the channel state information at the transmitter.read more
Citations
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On the Degrees of Freedom of SISO X-networks with Synergistic Alternating Channel State Information at transmitters
TL;DR: It is shown that the role of synergistic alternating CSIT with distribution $\Lambda(1/3,1/ 3, 1/3)$ is equivalent to the partial output feedback.
How much CSIT feedback is necessary for the multiuser MISO broadcast channels
TL;DR: This work provides a novel DoF region outer bound for the general K-user M × 1 MISO BC with partial current CSIT, and characterizes the minimum CSIT feedback that is necessary for any point of the sum DoF, which is optimal for the case with M ≥ K.
Proceedings ArticleDOI
DoF Region of the Decentralized MIMO Broadcast Channel—How many informed antennas do we need?
Antonio Bazco-Nogueras,Arash Gholami Davoodi,Paul de Kerret,David Gesbert,Nicolas Gresset,Syed A. Jafar +5 more
TL;DR: This work model this scenario as a Decentralized MIMO Broadcast Channel and characterize the Degrees-of-Freedom (DoF) region, showing that only k = max(N1, N2) antennas with perfect CSI are needed to achieve the DoF of the conventional BC with ubiquitous perfect CSI.
Proceedings ArticleDOI
Outage optimal relay selection and power allocation for amplify-and-forward relaying networks
TL;DR: Simulation results show that the proposed scheme outperforms existing schemes without relay selection and is also very efficient since the results obtained by this scheme are very close to the optimal results achieved by exhaustive search.
References
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Journal ArticleDOI
On the achievable throughput of a multiantenna Gaussian broadcast channel
Giuseppe Caire,Shlomo Shamai +1 more
TL;DR: Under certain mild conditions, this scheme is found to be throughput-wise asymptotically optimal for both high and low signal-to-noise ratio (SNR), and some numerical results are provided for the ergodic throughput of the simplified zero-forcing scheme in independent Rayleigh fading.
Journal ArticleDOI
Completely Stale Transmitter Channel State Information is Still Very Useful
TL;DR: In this paper, the authors show that in an MIMO broadcast channel with transmit antennas and receivers each with 1 receive antenna, K/1+1/2+···+ 1/K (>;1) degrees of freedom is achievable even when the fed back channel state is completely independent of the current channel state.
Posted Content
Completely Stale Transmitter Channel State Information is Still Very Useful
TL;DR: This paper shows that in an MIMO broadcast channel with transmit antennas and receivers each with 1 receive antenna, K/1/2+···+1/K (>;1) degrees of freedom is achievable even when the fed back channel state is completely independent of the current channel state.
Journal ArticleDOI
Degrees of Freedom of Time Correlated MISO Broadcast Channel With Delayed CSIT
TL;DR: This work describes the optimal degrees of freedom region for this more general two-user MISO broadcast correlated channel where the transmitter has imperfect knowledge of the current channel state, in addition to delayed channel state information.