349 research outputs found
Decentralizing multi-operator cognitive radio resource allocation: An asymptotic analysis
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Ein Bild und seine Geschichte
No full textAbedi E. A Picture and Its Story. Du : das Kulturmagazin. 2022;(912):93-97.Hermann Hesse's Siddhartha helped the Iranian mathematician Ehsan Abedi get over a difficult time in his life. During a study and research stay in Switzerland, he dedicated a painting to the author. Today it is part of the collection of the Museum Hermann Hesse.Dem iranischen Mathematiker Ehsan Abedi half Hermann Hesses Siddhartha über eine schwere Zeit in seinem Leben hinweg. Während eines Studien- und Forschungsaufenthalts in der Schweiz widmete er dem Autor ein Bild. Heute ist es Teil der Sammlung des Museums Hermann Hesse
Compiled notes for beloved juniors - series 1
No full textThese notes are kept by the author for more than 12 years. Author had started writing these notes since few weeks after he had completed his final MBBS exam with the intention to share officially with his juniors one day. He previously has shared some of them through social media since 13th May 2009. He decided to share now, he chooses year 202
Author Correction: RNAa-mediated epigenetic attenuation of the cell senescence via locus specific induction of endogenous SIRT1 (Scientific Reports, (2022), 12, 1, (15826), 10.1038/s41598-022-17972-9)
Full text link\ua9 The Author(s) 2023.The original version of this Article contained an error in the spelling of the author Ehsan Soleymaninejadian which was incorrectly given as Ehsan Soleimaninejadian. The original Article has been corrected
Antenna Placement in a Compressive Sensing-Based Colocated MIMO Radar
No full textCompressive sensing (CS) has been widely used in multiple-input-multiple-output (MIMO) radar in recent years. Unlike traditional MIMO radar, detection/estimation of targets in a CS-based MIMO radar is accomplished via sparse recovery. In this article, for a CS-based colocated MIMO radar with linear arrays, we attempt to improve the target detection performance by reducing the coherence of the associated sensing matrix. Our tool in reducing the coherence is the placement of the antennas across the array aperture. In particular, we choose antenna positions within a given grid. Initially, we formalize the position selection problem as finding binary weights for each of the locations. This problem is highly nonconvex and combinatorial in nature. Instead, we find continuous weight values for each location and interpret them as the probability of including an antenna at the given location. Next, we select antenna locations randomly according to the obtained probability distribution. We formulate the problem for the general case of a MIMO radar with independent transmit and receive arrays for which we propose an iterative algorithm. For the special case of a transceiver array, the solution is obtained through a convex optimization approach. Our experiments show that the proposed method achieves a superior detection performance compared to a uniform random placement of the antennas within the array aperture. Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Signal Processing System
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