Results 41 to 50 of about 476,199 (158)
The Scientific World Journal, Volume 2014, Issue 1, 2014., 2014 We present in this work a low‐complexity algorithm to solve the sum rate maximization problem in multiuser MIMO broadcast channels with downlink beamforming. Our approach decouples the user selection problem from the resource allocation problem and its main goal is to create a set of quasiorthogonal users.
Eduardo Castañeda +5 more
wiley +1 more source
Smell loss is associated with cognitive impairment in amyotrophic lateral sclerosis patients
CNS Neuroscience &Therapeutics, Volume 30, Issue 7, July 2024.The olfactory performance of ALS patients is correlated with cognitive impairment, particularly frontotemporal dysfunction. Abstract Background Smell loss significantly impacts the quality of life in patients. However, there is limited research on smell loss in individuals with amyotrophic lateral sclerosis (ALS), and the correlation between smell loss
Xin Huang +9 more
wiley +1 more source
International Journal of Antennas and Propagation, Volume 2012, Issue 1, 2012., 2012 Although antenna selection is a simple and efficient technique for enhancing the downlink performance of multiuser diversity systems, the large antenna interelement spacing required for achieving spatial diversity is prohibitive for user terminals due to size restrictions.
Elpiniki P. Tsakalaki +4 more
wiley +1 more source
On the Fundamental Feedback-vs-Performance Tradeoff over the MISO-BC with Imperfect and Delayed CSIT
, 2013 International audienceThis work considers the multiuser multiple-input single-output (MISO) broadcast channel (BC), where a transmitter with M antennas transmits information to K single-antenna users, and where - as expected - the quality and timeliness ...
Yang, Sheng +5 more
core +1 more source
Secrecy degrees of freedom of the 2 interference channel with delayed CSIT
, 2014 We consider the two-hop interference channel with confidential messages (ICC), where each transmitter sends one confidential message to its intended destination through two trusted relays.
Wang, Zhao, +2 more
core +1 more source
Interference alignment in distributed cooperative relay system with delayed CSIT
, 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.
Mark Beach +5 more
core +1 more source
A Novel Transmission Scheme for the $K$ -User Broadcast Channel With Delayed CSIT [PDF]
IEEE Transactions on Wireless Communications, 2018 The state-dependent $K$-user memoryless Broadcast Channel~(BC) with state feedback is investigated. We propose a novel transmission scheme and derive its corresponding achievable rate region, which, compared to some general schemes that deal with feedback, has the advantage of being relatively simple and thus is easy to evaluate.
He, Chao, Yang, Sheng, Piantanida, Pablo
openaire +3 more sources
The two-hop MISO broadcast network with quantized delayed CSIT
2013 IEEE Wireless Communications and Networking Conference (WCNC), 2013 We consider a downlink two-hop MISO broadcast network with a 2-antenna source communicating to 2 single-antenna destinations, assisted by 2 single-antenna intermediate relays. We investigate spectrally efficient transmission schemes and their achieved sum degrees of freedom (DoF), with quantized delayed channel state information (CSI) feedback ...
Zhao, Wang +3 more
openaire +4 more sources
Approximate capacity of the two-user MISO Broadcast Channel with delayed CSIT [PDF]
2013 51st Annual Allerton Conference on Communication, Control, and Computing (Allerton), 2013 Accepted for publication in IEEE Transactions on Communications. Preliminary results presented at the Fifty-First Annual Allerton Conference on Communication, Control, and ...
Alireza Vahid +2 more
openaire +3 more sources
On the Degrees of Freedom of the MISO Interference Broadcast Channel with Delayed CSIT
CoRR, 2019 17 pages, 5 figures, submitted to IEEE Transactions on Information ...
Marc Torrellas +2 more
openaire +2 more sources