Results 111 to 120 of about 1,397 (129)

On multi-user MISO wiretap channels with delayed CSIT

2014 IEEE International Symposium on Information Theory, 2014
The multiple-input single-output (MISO) wiretap channel with K legitimate single-antenna receivers, one single-antenna eavesdropper in presence of delayed channel state information at the transmitter (CSIT) is considered. The transmitter is equipped with (K+1) antennas and has independent messages intended for each one of the K legitimate receivers ...
Ravi Tandon, Pablo Piantanida, Shlomo Shamai   +2 more
openaire   +1 more source

Block Diagonalization in the MIMO Broadcast Channel with Delayed CSIT

GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference, 2009
This paper investigates the impact of delayed channel state information at the transmitter (CSIT) on the MIMO broadcast channel with block diagonalization (BD) precoding. First, an upper bound for the achievable throughput is provided, which shows that BD is more robust to imperfect CSIT than zeroforcing precoding as it has fewer inter-user interfering
Jun Zhang, Jeffrey G. Andrews, Robert W. Heath Jr.   +2 more
openaire   +1 more source

Interference alignment in distributed cooperative relay system with delayed CSIT

2014 XXXIth URSI General Assembly and Scientific Symposium (URSI GASS), 2014
This paper characterizes the degrees of freedom regions for the multi-user by using interference alignment in a distributed relay system with totally delayed and not too delayed CSI feedback. As a part of the characterization, some new transmission schemes for the relay interference alignment based on the previous Maddah-Ali and Tse (MAT) scheme and ...
Tian, Yue, Nix, Andrew R, Beach, Mark A
openaire   +2 more sources

Secure MIMO Interference Channel with Confidential Messages and Delayed CSIT

ICASSP 2019 - 2019 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2019
Secure degrees-of-freedom (SDoF) for multiple-input multiple-output (MIMO) interference channel with confidential messages and delayed channel state information at transmitter (CSIT) remains unclear, even for single-input single-output (SISO) case. In this paper, we propose an achievable SDoF for MIMO interference channel with confidential messages and
Tong Zhang, P. C. Ching
openaire   +1 more source

Robust beamforming for two-user MISO broadcasting channel with delayed CSIT

2014 IEEE 8th Sensor Array and Multichannel Signal Processing Workshop (SAM), 2014
Recently proposed MAT 1 scheme achieves high degrees of freedom (DoF) by exploiting delayed channel state information at transmitter side (CSIT) and the concept of interference alignment (IA), where the interference vectors of different time slots are aligned. As the starting work, MAT scheme considers no flexibility when reconstructing symbols at the
null Yi Luo, null Huiqin Du, T. Ratnarajah   +2 more
openaire   +1 more source

Delay-Sensitive Cross-Layer Designs for OFDMA Systems with Outdated CSIT

2007 IEEE Wireless Communications and Networking Conference, 2007
Cross-layer scheduling has been proposed to effectively boost the spectral efficiency of multi-user orthogonal frequency division multiple access (OFDMA) systems through multi-user selection diversity under two important assumptions - users are delay insensitive and channel state information at the transmitter (CSIT) is perfect.
David Shui Wing Hui, Vincent Kin Nang Lau   +1 more
openaire   +1 more source

Finite Field X-Channels with Delayed CSIT and Common Messages

2018 IEEE International Symposium on Information Theory (ISIT), 2018
We establish the capacity region of the two-user finite field X-Channels with delayed channel state information at the transmitters. We consider the most general case in which each transmitter has a common message for both receivers and a private message for each one of them. We derive a new set of outer-bounds for this problem that rely on an extremal
openaire   +1 more source

Timely-Throughput Optimal Scheduling With Delayed CSIT for Chase Combining HARQ

IEEE Transactions on Vehicular Technology, 2022
Dony J. Muttath, M. Santhoshkumar, K. Premkumar   +2 more
openaire   +1 more source

The Degrees of Freedom Region and Interference Alignment for the MIMO Interference Channel With Delayed CSIT

IEEE Transactions on Information Theory, 2012
Chinmay S Vaze, Mahesh K Varanasi
exaly  

Degrees of Freedom Region of the MIMO Interference Channel With Output Feedback and Delayed CSIT

IEEE Transactions on Information Theory, 2013
Ravi Tandon, Soheil Mohajer, H Vincent Poor   +2 more
exaly