title: A Unified Multi-Functional Dynamic Spectrum Access Framework: Tutorial, Theory and Multi-GHz Wideband Testbed.
abstract: Dynamic spectrum access is a must-have ingredient for future sensors that are ideally cognitive. The goal of this paper is a tutorial treatment of wideband cognitive radio and radar-a convergence of (1) algorithms survey, (2) hardware platforms survey, (3) challenges for multi-function (radar/communications) multi-GHz front end, (4) compressed sensing for multi-GHz waveforms-revolutionary A/D, (5) machine learning for cognitive radio/radar, (6) quickest detection, and (7) overlay/underlay cognitive radio waveforms. One focus of this paper is to address the multi-GHz front end, which is the challenge for the next-generation cognitive sensors. The unifying theme of this paper is to spell out the convergence for cognitive radio, radar, and anti-jamming. Moore's law drives the system functions into digital parts. From a system viewpoint, this paper gives the first comprehensive treatment for the functions and the challenges of this multi-function (wideband) system. This paper brings together the inter-disciplinary knowledge.
authors.affiliation: Department of Electrical and Computer Engineering, Center for Manufacturing Research, Tennessee Technological University, Cookeville, TN 38505, USA; E-Mails:  nguo@tntech.edu  (N.G.);  ysong21@tntech.edu  (Y.S.);  Vasu.Chakravarthy@wpafb.af.mil  (V.C.);  zhu21@tntech.edu  (Z.H.);  pzhang21@tntech.edu  (P.Z.);  zchen42@tntech.edu  (Z.C.).
authors.forename: Robert
authors.initials: R
authors.lastname: Qiu
authors.forename: Nan
authors.initials: N
authors.lastname: Guo
authors.forename: Husheng
authors.initials: H
authors.lastname: Li
authors.forename: Zhiqiang
authors.initials: Z
authors.lastname: Wu
authors.forename: Vasu
authors.initials: V
authors.lastname: Chakravarthy
authors.forename: Yu
authors.initials: Y
authors.lastname: Song
authors.forename: Zhen
authors.initials: Z
authors.lastname: Hu
authors.forename: Peng
authors.initials: P
authors.lastname: Zhang
authors.forename: Zhe
authors.initials: Z
authors.lastname: Chen