C
Christian Berger
Researcher at Pontifical Catholic University of Chile
Publications - 213
Citations - 9012
Christian Berger is an academic researcher from Pontifical Catholic University of Chile. The author has contributed to research in topics: Orthogonal frequency-division multiplexing & Communication channel. The author has an hindex of 43, co-authored 196 publications receiving 7338 citations. Previous affiliations of Christian Berger include University of Mainz & Karlsruhe Institute of Technology.
Papers
More filters
Journal ArticleDOI
Topolectrical-circuit realization of topological corner modes
Stefan Imhof,Christian Berger,Florian Bayer,Johannes Brehm,Laurens W. Molenkamp,Tobias Kiessling,Frank Schindler,Ching Hua Lee,Ching Hua Lee,Martin Greiter,Titus Neupert,Ronny Thomale +11 more
TL;DR: In this paper, a topolectrical circuit design for realizing the corner modes is presented, where the modes appear as topological boundary resonances in the corner impedance profile of the circuit.
Journal ArticleDOI
Sparse channel estimation for multicarrier underwater acoustic communication: From subspace methods to compressed sensing
TL;DR: Various channel estimators that exploit the channel sparsity in a multicarrier underwater acoustic system are presented, including subspace algorithms from the array precessing literature, namely root-MUSIC and ESPRIT, and recent compressed sensing algorithms in form of Orthogonal Matching Pursuit and Basis Pursuit.
Journal ArticleDOI
Application of compressive sensing to sparse channel estimation
TL;DR: It is pointed out that a popular assumption - that multipath channels are sparse in their equivalent baseband representation - has pitfalls and there are over-complete dictionaries that lead to much sparser channel representations and better estimation performance.
Journal ArticleDOI
Satellite Remote Sensing of Surface Urban Heat Islands: Progress, Challenges, and Perspectives
Decheng Zhou,Jingfeng Xiao,Stefania Bonafoni,Christian Berger,Kaveh Deilami,Yuyu Zhou,Steve Frolking,Rui Yao,Zhi Qiao,José A. Sobrino +9 more
TL;DR: An exponentially increasing trend of SUHI research since 2005, with clear preferences for geographic areas, time of day, seasons, research foci, and platforms/sensors is found, and key potential directions and opportunities for future efforts are proposed.
Journal ArticleDOI
Signal Processing for Passive Radar Using OFDM Waveforms
TL;DR: This paper derives the exact matched filter formulation for passive radar using OFDM waveforms, and shows that the current approach using Fourier analysis across block channel estimates is equivalent to the matched filter, based on a piecewise constant assumption on the Doppler-induced phase rotation in the time domain.