Hassani, S. A.; Oemisch, M.; Balcarras, M.; Westendorff, S.; Ardid-Ramírez, Joan Salvador; van der Meer, M. A.; Tiesinga, P.; Womelsdorf, T.(Nature Publishing Group, 2017-01-16)
[EN] Noradrenaline is believed to support cognitive flexibility through the alpha 2A noradrenergic receptor (a2A-NAR) acting in prefrontal cortex. Enhanced flexibility has been inferred from improved working memory with ...
Shen, C.; Ardid-Ramírez, Joan Salvador; Kaping, D.; Westendorff, S.; Everling, S.; Womelsdorf, T.(Oxford University Press, 2015-08)
[EN] Errors indicate the need to adjust attention for improved future performance. Detecting errors is thus a fundamental step to adjust and control attention. These functions have been associated with the dorsal anterior ...
Balcarras, M.; Ardid-Ramírez, Joan Salvador; Kaping, D.; Everling, S.; Womelsdorf, T.(MIT Press, 2016-02-01)
[EN] Attention includes processes that evaluate stimuli relevance, select the most relevant stimulus against less relevant stimuli, and bias choice behavior toward the selected information. It is not clear how these processes ...
Womelsdorf, T.; Ardid-Ramírez, Joan Salvador; Everling, S.; Valiante, T.(Elsevier, 2014-11-17)
[EN] Background: It is widely held that single cells in anterior cingulate and lateral prefrontal cortex (ACC/PFC) coordinate their activity during attentional processes, although cellular activity that may underlie such ...
Ardid-Ramírez, Joan Salvador; Vinck, M.; Kaping, D.; Marquez, S.; Everling, S.; Womelsdorf, T.(Society for Neuroscience, 2015-02-18)
[EN] Microcircuits are composed of multiple cell classes that likely serve unique circuit operations. But how cell classes map onto circuit functions is largely unknown, particularly for primate prefrontal cortex during ...
Cabrejas Peñuelas, Jorge; Roger Varea, Sandra; Calabuig Soler, Daniel; Fouad, Yaser M. M.; Gohary, Ramy H.; Monserrat del Río, José Francisco; Yanikomeroglu, Halim(Institute of Electrical and Electronics Engineers (IEEE), 2016-06-14)
[EN] This paper investigates the use of non-coherent communication techniques for open-loop transmission over temporally-correlated Rayleigh-fading MIMO channels. These techniques perform data detection without knowing the ...
Calabuig Soler, Daniel; Gohary, Ramy H.; Yanikomeroglu, Halim(Institute of Electrical and Electronics Engineers (IEEE), 2016-01)
[EN] This paper studies the optimal points in the capacity region of Gaussian multiple access channels (GMACs) with constant fading, multiple antennas, and various power constraints. The points of interest maximize general ...
Fouad, Yaser M. M.; Gohary, Ramy H.; Cabrejas Peñuelas, Jorge; Yanikomeroglu, Halim; Calabuig Soler, Daniel; Roger Varea, Sandra; Monserrat del Río, José Francisco(Institute of Electrical and Electronics Engineers (IEEE), 2015-03)
In this paper, we consider the application of non-coherent Grassmannian signalling in practical multi-channel-frequency-flat multiple-input multiple-output (MIMO) wireless communication systems. In these systems, Grassmannian ...