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Mostrando ítems 81-90 de 234
Evolving military broadband wireless communication systems: WiMAX, LTE and WLAN
(Institute of Electrical and Electronics Engineers, 2016)
[Abstract]: Emerging technologies for mobile broadband wireless are being considered as a Commercial Off-The-Shelf solution to cover the operational requirements of the future warfare. The capabilities of these technologies ...
Real-time validation of a SDR implementation of TDD WiMAX standard
(The Wireless Innovation Forum, 2013)
[Abstract]: This paper focuses on the validation of an innovative software-
defined radio architecture for a WiMAX system based
on commercially available field-programmable gate array
and digital signal processor modules. ...
Unleashing the Potential of LTE for Next Generation Railway Communications
(Springer, 2015)
[Abstract]: 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 ...
Bit Error Probability and Capacity Bound of OFDM Systems in Deterministic Doubly-Selective Channels
(Institute of Electrical and Electronics Engineers, 2020-10)
[Abstract]: Doubly-selective channels, such as those that occur when the transmitter and the receiver move relative to each other at high speeds, are a key scenario for fifth generation (5G) cellular systems, which are ...
Time-Modulated Arrays With Haar Wavelets
(Institute of Electrical and Electronics Engineers, 2020-11)
[Abstract]. 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 ...
Time-modulated array beamforming with periodic stair-step pulses
(Elsevier, 2020-01)
[Abstract]: 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 ...
Algorithms for determining relative position between spheroids and hyperboloids with one sheet
(Elsevier, 2019-06)
[Abstract]: In this work we present a new method for determining relative positions between one moving object, modelled by a bounding spheroid, and surrounding static objects, modelled by circular hyperboloids of one sheet. ...
Design and implementation of an OFDMA-TDD physical layer for WiMAX applications
(SpringerOpen & European Association for Signal Processing, 2013)
[Abstract]: This work describes the design, implementation, and performance evaluation of an orthogonal frequency division multiple access (OFDMA) time-division duplexing (TDD) physical layer (PHY) compliant with the ...
Low-Complexity Distance-Based Scheduling for Multi-User XL-MIMO Systems
(IEEE, 2021-11)
[Abstract]: We introduce Distance-Based Scheduling (DBS), a new technique for user selection in downlink multi-user communications with extra-large (XL) antenna arrays. DBS categorizes users according to their equivalent ...
Hybrid LISA for Wideband Multiuser Millimeter-Wave Communication Systems Under Beam Squint
(IEEE, 2019-02)
[Abstract]: This paper jointly addresses user scheduling and precoder/combiner design in the downlink of a wideband millimeter-wave communications system. We consider the orthogonal frequency-division multiplexing modulation ...