Results 51 to 60 of about 476,199 (158)

Degrees of freedom of two hop MISO broadcast network with mixed CSIT

, 2014
A downlink two-hop MISO broadcast network is considered, with a two-antenna source communicating to 2 single-antenna destinations, via multiple single-antenna relays in between.
Skoglund, Mikael, Wang, Chao, Zhao, Wang, Wang, Chao,, Xiao, Ming, Zhao, Wang,, Xiao, Ming,, Skoglund, Mikael,   +7 more
core   +1 more source

Novel transmission and beamforming strategies for multiuser MIMO with various CSIT types [PDF]

, 2016
In multiuser multi-antenna wireless systems, the transmission and beamforming strategies that achieve the sum rate capacity depend critically on the acquisition of perfect Channel State Information at the Transmitter (CSIT). Accordingly, a high-rate low-
Dai, Mingbo
core   +1 more source

On the secrecy degrees of freedom of multi-antenna wiretap channels with delayed CSIT [PDF]

2011 IEEE International Symposium on Information Theory Proceedings, 2011
The secrecy degrees of freedom (SDoF) of the Gaussian multiple-input and single-output (MISO) wiretap channel is studied under the assumption that delayed channel state information (CSI) is available at the transmitter and each receiver knows its own instantaneous channel.
Sheng Yang 0001, Pablo Piantanida, Mari Kobayashi, Shlomo Shamai   +3 more
openaire   +4 more sources

On the degrees-of-freedom of the 3-user MISO broadcast channel with hybrid CSIT

, 2014
—The 3-user multiple-input single-output (MISO) broadcast channel (BC) with hybrid channel state information at the transmitter (CSIT) is considered. In this framework, there is perfect and instantaneous CSIT from a subset of users and delayed CSIT from ...
Saidhiraj Amuru, Ravi Tandon, Shlomo Shamai (shitz, Shlomo Shamai   +3 more
core   +1 more source

Degrees of Freedom of Time Correlated MISO Broadcast Channel With Delayed CSIT [PDF]

IEEE Transactions on Information Theory, 2013
We consider the time correlated multiple-input single-output (MISO) broadcast channel where the transmitter has imperfect knowledge on the current channel state, in addition to delayed channel state information. By representing the quality of the current channel state information as P^-α for the signal-to-noise ratio P and some constant α \geq 0, we ...
Yang, Sheng, Kobayashi, Mari, Gesbert, David, Yi, X.   +3 more
openaire   +6 more sources

Asymptotic tradeoff between cross-layer goodput gain and outage diversity in OFDMA systems with slow fading and delayed CSIT

, 2008
There are two important aspects of cross-layer gains in multiuser OFDMA systems with slow fading channels. They are the system goodput gain as well as the packet diversity gain. The former aspect of cross-layer designs has been well-studied under perfect
Lau, Vincent K.N., Ng, Wing Kwan, Hui, David Shui Wing   +2 more
core   +1 more source

Approximate Capacity Region of the MISO Broadcast Channels With Delayed CSIT

IEEE Transactions on Communications, 2016
We consider the problem of multiple-input single-output broadcast channels with Rayleigh fading where the transmitter has access to delayed knowledge of the channel state information. We first characterize the capacity region of this channel with two users to within constant number of bits for all values of the transmit power.
Alireza Vahid, Mohammad Ali Maddah-Ali, Amir Salman Avestimehr   +2 more
openaire   +1 more source

Asymptotic Tradeoff between Cross-Layer Goodput Gain and Outage Diversity in OFDMA Systems with Slow Fading and Delayed CSIT

, 2007
In this paper, we consider on the asymptotic tradeoff analysis between the system goodput gain and the packet outage diversity gain in cross-layer OFDMA systems with slow frequency selective fading and delayed CSIT.
David Shui Wing Hui, Ng, Wing Kwan, Vincent Kin Nang Lau, Hui, David Shui Wing, Wing Kwan Ng, Lau, Vincent Kin Nang   +5 more
core   +1 more source

Rate-Splitting and Sum-DoF for the K-User MISO Broadcast Channel with Mixed CSIT and Order-(K-1) Messages [PDF]

, 2023
In this paper, we propose a rate-splitting design and characterize the sum-degrees-of-freedom (DoF) for the K-user multiple-input-single-output (MISO) broadcast channel with mixed channel state information at the transmitter (CSIT) and order-(K-1 ...
Li, Jingfu, Chen, Gaojie, Zhang, Tong, Zheng, Shuo, Wang, Shuai, Yuan, Weijie, Wang, Rui   +6 more
core   +1 more source

On the Generalized Degrees of Freedom of the MIMO Interference Channel With Delayed CSIT

IEEE Transactions on Information Theory, 2019
The generalized degrees of freedom (GDoF) of the two-user multiple-input multiple-output interference channel is studied under the assumption of delayed channel state information at the transmitters. In particular, with $M$ antennas at each transmitter and $N$ antennas at each receiver, and in the non-trivial case when $M>N$ (with the
Kaniska Mohanty, Mahesh K. Varanasi
openaire   +1 more source