?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Fwww.eledia.org%2Fstudents-reports%2F741%2F&rft.title=Free%E2%80%90Space+Microwave+Imaging+through+Alphabet%E2%80%90Based+Bayesian+Compressive+Sensing&rft.creator=Anselmi%2C+N.&rft.creator=Oliveri%2C+G.&rft.creator=Hannan%2C+M.&rft.creator=Salucci%2C+M.&rft.creator=Massa%2C+A.&rft.subject=A+WC+Next+Generation+Wireless+Communications&rft.subject=M+CS+Compressive+Sensing&rft.description=A+key+requirement+to+be+satisfied+when+exploiting+Compressive+Sensing+(CS)+methods+in+inverse+scattering+(IS)+problems+is+that+the+unknowns+(e.g.%2C+the+contrast+function+or+the+equivalent+sources)+are+sparse+with+respect+to+the+considered+expansion+basis.+State-of-the-art+CS-based+microwave+imaging+techniques+typically+consider+single-resolution+pixel-based+representations%2C+limiting+their+domain+of+applicability+to+the+retrieval+of+few+and+isolated+pixels+within+the+investigated+domain.+Within+this+framework%2C+this+work+is+aimed+at+extending+the+range+of+applicability+of+CS-based+approaches+to+the+retrieval+of+unknown+scatterers+having+arbitrary+shape+and+dimensions.+Since+in+real+applications+no+a-priori+information+about+the+investigation+domain+is+available%2C+the+idea+is+to+retrieve+a+set+of+%22candidate%22+solutions+by+executing+several+CS+inversions+using+different+expansion+bases+(e.g.%2C+pixel%2C+Haar+wavelets%2C+Meyer+wavelets%2C+...).+Following+the+CS+paradigm%2C+the+%22best%22+solution+can+then+be+identified+as+the+sparsest+one%2C+i.e.%2C+the+solution+with+the+lowest+number+of+non-zero+retrieved+coefficients.+A+preliminary+numerical+validation+of+the+proposed+alphabet-based+CS+microwave+imaging+technique+is+given.+Some+numerical+comparisons+with+competitive+state-of-the-art+inverse+scattering+techniques+is+shown%2C+as+well.&rft.publisher=ELEDIA+Research+Center+-+University+of+Trento&rft.date=2016&rft.type=Monograph&rft.type=NonPeerReviewed&rft.format=text&rft.language=en&rft.identifier=http%3A%2F%2Fwww.eledia.org%2Fstudents-reports%2F741%2F7%2FFree%25E2%2580%2590Space_Microwave_Imaging_through_Alphabet%25E2%2580%2590Based_Bayesian_Compressive_Sensing.v2.pdf&rft.identifier=++Anselmi%2C+N.+and+Oliveri%2C+G.+and+Hannan%2C+M.+and+Salucci%2C+M.+and+Massa%2C+A.++(2016)+Free%E2%80%90Space+Microwave+Imaging+through+Alphabet%E2%80%90Based+Bayesian+Compressive+Sensing.++Technical+Report.+ELEDIA+Research+Center+-+University+of+Trento.+++++