Zobrazeno 1 - 10
of 1 359
pro vyhledávání: '"Castedo, L."'
Publikováno v:
Lecture Notes in Computer Science, vol 9066. Springer, Cham, 2015
In an increasingly demanding marketplace that will put great strain on railway services, research on broadband wireless communication must continue to strive for improvement. Based on the mature narrowband GSM technology, Global System for Mobile Com
Externí odkaz:
http://arxiv.org/abs/2402.04479
Publikováno v:
IEEE Transactions on Communications, vol. 67, n.o 8, pp. 5604-5617, Aug 2019
The design of zero-delay Joint Source-Channel Coding (JSCC) schemes for the transmission of correlated information over fading Multiple Access Channels (MACs) is an interesting problem for many communication scenarios like Wireless Sensor Networks (W
Externí odkaz:
http://arxiv.org/abs/2401.16853
Publikováno v:
IEEE Transactions on Communications, vol. 66, n.o 12, pp. 6110-6122, Aug 2018
This work focuses on distributed linear precoding when users transmit correlated information over a fading Multiple-Input and Multiple-Output Multiple Access Channel. Precoders are optimized in order to minimize the sum-Mean Square Error (MSE) betwee
Externí odkaz:
http://arxiv.org/abs/2401.16826
Autor:
González-Coma, J. P., Rodríguez-Fernández, J., González-Prelcic, N., Castedo, L., Heath, R. W.
Publikováno v:
IEEE J. Sel. Top. Signal Process., vol. 12, no. 2, pp. 353-367, May 2018
Configuring the hybrid precoders and combiners in a millimeter wave (mmWave) multiuser (MU) multiple-input multiple-output (MIMO) system is challenging in frequency selective channels. In this paper, we develop a system that uses compressive estimati
Externí odkaz:
http://arxiv.org/abs/2401.16241
Publikováno v:
IEEE Antennas and Wireless Propagation Letters, vol. 17, no. 12, pp. 2508-2512, Dec. 2018
We present a single sideband time-modulated multibeam phased array governed by periodic Nyquist pulsed signals. A Nyquist pulse is a physically realizable approach to the ideal sinc function. Hence, its low-pass spectrum suits particularly well for t
Externí odkaz:
http://arxiv.org/abs/2401.17951
Publikováno v:
IEEE Antennas and Wireless Propagation Letters, vol. 19, no. 11, pp. 1862-1866, Nov. 2020
Time-modulated arrays (TMAs) can effectively perform beamsteering over the first positive harmonic pattern by applying progressively delayed versions of stair-step approximations of a sine waveform to the antenna excitations. In this letter, we consi
Externí odkaz:
http://arxiv.org/abs/2401.17950
Publikováno v:
IEEE Antennas and Wireless Propagation Letters, vol. 17, no. 3, pp. 497-500, March 2018
Conventional time-modulated arrays are based on the application of variable-width periodical rectangular pulses (easily implemented with radio frequency switches) to the individual antenna excitations. However, a serious bottleneck arises when the nu
Externí odkaz:
http://arxiv.org/abs/2401.15731
Publikováno v:
Signal Processing, vol. 166, Jan 2020
Time-modulated arrays (TMAs) are able to improve the side-lobe level of the radiation pattern at the fundamental mode but cannot steer the beam at such a mode towards a given direction. Beam-steering is possible in a TMA, but only at the harmonic pat
Externí odkaz:
http://arxiv.org/abs/2401.15386
Publikováno v:
IEEE Antennas and Wireless Propagation Letters, vol. 18, no. 2, pp. 407-411, Feb. 2019
Bipolar (+/-1) sequences with no zero state suit particularly well for safeguarding the switched feeding network efficiency when applied to time-modulated arrays (TMAs). During the zero state of a conventional time-modulating sequence, if a given arr
Externí odkaz:
http://arxiv.org/abs/2401.15379
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