Operators and Matrices · Volume 12, Issue 3 On a problem by Hans Feichtinger 12-53 Pages 881-891 DOI 10.7153/oam-2018-12-53 Downloads Short PDF Full PDF PNG Authors Radu Balan Kasso A. Okoudjou Anirudha Poria Keywords modulation spaces pseudodifferential operators time-frequency analysis trace-class operators Wilson bases Subject classes 45P05 47B10 42C15