A cloud-IoT model for reconfigurable radio sensing: The Radio.Sense platform

A cognitive transceiver is required to opportunistically use vacant spectrum resources licensed to primary users. Thus, it relies on a complete adaptive behavior composed of: reconfigurable radio frequency (RF) parts, enhanced spectrum sensing algorithms, and sophisticated machine learning techniques. In this paper, we present a review of the recent advances in CR transceivers hardware design and algorithms. For the RF part, three types of antennas are presented: UWB antennas, frequency-reconfigurable/tunable antennas, and UWB antennas with reconfigurable band notches. The main challenges faced by the design of the other RF blocks are also discussed. Sophisticated spectrum sensing algorithms that overcome main sensing challenges such as model uncertainty, hardware impairments, and wideband sensing are highlighted. The cognitive engine features are discussed. Moreover, we study unsupervised classification algorithms and a reinforcement learning (RL) algorithm that has been proposed to perform decision-making in CR networks.

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The memristor in reconfigurable radio frequency devices

Proceedings of the 2012 IEEE International Symposium on Antennas and Propagation ◽

10.1109/aps.2012.6349274 ◽

2012 ◽

Cited By ~ 1

Author(s):

Douglas H. Werner ◽

Micah D. Gregory

Keyword(s):

Radio Frequency ◽

Reconfigurable Radio

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Reconfigurable Radio Systems for Public Safety Based on Low-Cost Platforms

Intelligence and Security Informatics - Lecture Notes in Computer Science ◽

10.1007/978-3-540-89900-6_24 ◽

2008 ◽

pp. 237-247 ◽

Cited By ~ 3

Author(s):

Gianmarco Baldini ◽

Raimondo Giuliani ◽

Dimitrios Symeonidis

Keyword(s):

Public Safety ◽

Low Cost ◽

Radio Systems ◽

Reconfigurable Radio

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A Reconfigurable Radio-Frequency Converter IC in 0.18 µm CMOS

Electronics ◽

10.3390/electronics8101146 ◽

2019 ◽

Vol 8 (10) ◽

pp. 1146

Author(s):

Carlos Sánchez-Azqueta ◽

Erick Guerrero ◽

Cecilia Gimeno ◽

Santiago Celma

Keyword(s):

Wavelength Division Multiplexing ◽

Frequency Synthesizer ◽

Frequency Converter ◽

Impedance Matching ◽

Cmos Process ◽

Wavelength Division ◽

Triple Play ◽

Band Pass ◽

Reconfigurable Radio ◽

Lc Tank

This work presents a reconfigurable RF converter for DVB-T television applications using triple-play over GPON. The system takes the DVB-T input, a wavelength division multiplexing (WDM) signal with spectral inversion in the range from 47 M Hz –1000 M Hz , up-converts its frequency to the band-pass of a highly selective surface-acoustic wave (SAW) filter centered at 1 . 3 G Hz , and then down-converts it so that it is compatible with the antenna input of conventional television sets. The designed RF converter incorporates two pairs of frequency synthesizer and mixer, based, respectively, on an integer-N phase-locked loop (PLL) with two LC-tank VCOs with 128 coarse tuning bands in the range from 1.35 G Hz –2.7 G Hz , and a double-balanced Gilbert cell, modified for better impedance matching and improved linearity. It is fed with regulated supplies compensated in temperature and programmed by an I 2 C interface operating on five 16-bit registers. This work presents the experimental characterization of the whole system plus selected cells for stand-alone testing, which have been fabricated in a 0 . 18 m CMOS process.

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