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The $2$ user MIMO interference channel with arbitrary antenna configurations is studied under arbitrary levels of partial CSIT for each of the channels, to find the degrees of freedom (DoF) achievable by either user while the other user…

Information Theory · Computer Science 2016-04-05 Bofeng Yuan , Syed A. Jafar

We consider a $K$-user multiple-input single-output (MISO) broadcast channel (BC) where the channel state information (CSI) of user $i(i=1,2,\ldots,K)$ may be either instantaneously perfect (P), delayed (D) or not known (N) at the…

Information Theory · Computer Science 2015-03-04 Borzoo Rassouli , Chenxi Hao , Bruno Clerckx

The degrees of freedom (DoF) region is characterized for the $2$-user multiple input multiple output (MIMO) broadcast channel (BC), where the transmitter is equipped with $M$ antennas, the two receivers are equipped with $N_1$ and $N_2$…

Information Theory · Computer Science 2019-01-21 Arash Gholami Davoodi , Syed A. Jafar

This paper considers a K-user Multiple-Input-Single-Output (MISO) Interference Channel (IC), where the channel state information obtained by the transmitters (CSIT) is perfect, but completely outdated. A Retrospective Interference Alignment…

Information Theory · Computer Science 2015-02-26 Chenxi Hao , Bruno Clerckx

We consider a multiple-input-single-output (MISO) broadcast channel with mixed channel state information at the transmitter (CSIT) that consists of imperfect current CSIT and perfect outdated CSIT. Recent work by Kobayashi et al. presented…

Information Theory · Computer Science 2012-03-07 Tiangao Gou , Syed A. Jafar

The degrees of freedom (DoF) of the $K$-user multiple-input multiple-output (MIMO) interference channel are studied when perfect, but delayed channel state information is available at the transmitter side (delayed CSIT). Recent works have…

Information Theory · Computer Science 2016-11-18 Marc Torrellas , Adrian Agustin , Josep Vidal

The Degrees of Freedom (DoF) of a K-User MISO Broadcast Channel (BC) is studied when the Transmitter (TX) has access to a delayed channel estimate in addition to an imperfect estimate of the current channel. The current estimate could be…

Information Theory · Computer Science 2013-01-11 Paul de Kerret , Xinping Yi , David Gesbert

Building on the recent coded-caching breakthrough by Maddah-Ali and Niesen, the work here considers the $K$-user cache-aided wireless multi-antenna (MISO) symmetric broadcast channel (BC) with random fading and imperfect feedback, and…

Information Theory · Computer Science 2016-04-26 Jingjing Zhang , Petros Elia

The question of whether the degrees of freedom (DoF) of multi-user networks can be enhanced even under isotropic fading and no channel state information (or output feedback) at the transmitters (CSIT) is investigated. Toward this end, the…

Information Theory · Computer Science 2012-09-07 Chinmay S. Vaze , Mahesh K. Varanasi

The sum degrees of freedom (DoF) of the two-user MIMO X-channel is characterized in the presence of output feedback and delayed channel state information (CSI). The number of antennas at each transmitters is assumed to be M and the number…

Information Theory · Computer Science 2016-11-15 Ravi Tandon , Soheil Mohajer , H. Vincent Poor , Shlomo Shamai

We consider communication over heterogeneous parallel channels, where a transmitter is connected to two users via two parallel channels: a MIMO broadcast channel (BC) and a noiseless rate-limited multicast channel. We characterize the…

Information Theory · Computer Science 2016-11-18 Jinyuan Chen , Sheng Yang , Ayfer Ozgur , Andrea Goldsmith

This work investigates the degrees of freedom (DoF) of the K-user multiple-input single-output (MISO) interference channel (IC) with imperfect delayed channel state information at the transmitters (dCSIT). For this setting, new DoF inner…

Information Theory · Computer Science 2016-11-17 Marc Torrellas , Adrian Agustin , Josep Vidal

In this work, we study the impact of imperfect sharing of the Channel State Information (CSI) available at the transmitters on a Network MIMO setting in which a set of $M$ transmit antennas, possibly not co-located, jointly serve two…

Information Theory · Computer Science 2020-05-14 Antonio Bazco-Nogueras , Arash Davoodi , Paul de Kerret , David Gesbert , Nicolas Gresset , Syed Jafar

In this paper, we propose a new retrospective interference alignment for two-cell multiple-input multiple-output (MIMO) interfering multiple access channels (IMAC) with the delayed channel state information at the transmitters (CSIT). It is…

Information Theory · Computer Science 2016-11-17 Wonjae Shin , Yonghee Han , Jungwoo Lee , Namyoon Lee , Robert W. Heath

In this paper, we consider a two-cell interfering two-user multiple-input multiple-output multiple access channel (MIMO-MAC) with limited feedback. We first investigate the multiplexing gain of such channel when users have perfect channel…

Information Theory · Computer Science 2010-10-06 Namyoon Lee , Wonjae Shin , Bruno Clerckx

The Gaussian $K$-user interference and $M\times K$ X channels are investigated with no instantaneous channel state information (CSI) at transmitters. First, it is assumed that the CSI is fed back to all nodes after a finite delay (delayed…

Information Theory · Computer Science 2016-11-17 Mohammad Javad Abdoli , Akbar Ghasemi , Amir Keyvan Khandani

In this paper, we study the achievable degrees-of-freedom (DoF) regions of the $K$-user multiple-input-single-output (MISO) time correlated broadcast channel (BC). The time correlation induces knowledge of the current channel state…

Information Theory · Computer Science 2014-12-03 Yi Luo , Tharmalingam Ratnarajah , Anastasios K. Papazafeiropoulos

In this paper, we consider the $K$-user cache-aided wireless MISO broadcast channel (BC) with random fading and delayed CSIT, and identify the optimal cache-aided degrees-of-freedom (DoF) performance within a factor of 4. The achieved…

Information Theory · Computer Science 2016-04-25 Jingjing Zhang , Petros Elia

The two user multiple-input single-output (MISO) broadcast channel with confidential messages (BCCM) is studied in which the nature of channel state information at the transmitter (CSIT) from each user can be of the form $I_{i}$, $i=1,2$…

Information Theory · Computer Science 2015-02-10 Pritam Mukherjee , Ravi Tandon , Sennur Ulukus

This paper studies the interference channel with a cognitive relay (ICCR) under delayed feedback. Three types of delayed feedback are studied: delayed channel state information at the transmitter (CSIT), delayed output feedback, and delayed…

Information Theory · Computer Science 2015-07-27 Hyo Seung Kang , Myung Gil Kang , Wan Choi , Aria Nosratinia