A fast algorithm for adaptive polynomial filtering. - Riitta Niemistö; Ioan Tabus; Jaakko Astola (Signal Process., 1998)

A line spectrum approach for the design of optimum compaction FIR filters. - Ioan Tabus; Riitta Niemistö; Jaakko Astola (EUSIPCO, 2000)

SDP design procedure for energy compaction IIR filters. - Riitta Niemistö; Bogdan Dumitrescu; Ioan Tabus (ICASSP, 2001)

ICA for acoustic echo control. - Margarita Magadán; Riitta Niemistö; Ulla Ruotsalainen; Jyrki Mottonen (EUSIPCO, 2002)

Robust fast affine projection algorithm for nonlinear acoustic echo cancellation. - Riitta Niemistö; Tuomo Mäkelä; Ville Myllylä (EUSIPCO, 2002)

SDP design procedures for near-optimum IIR compaction filters. - Riitta Niemistö; Bogdan Dumitrescu; Ioan Tabus (Signal Process., 2002)

An iterative reweighted least-squares algorithm for the design of 2D IIR filters. - Bogdan Dumitrescu; Riitta Niemistö (EUSIPCO, 2004)

Simplified procedures for quasi-equiripple IIR filter design. - Riitta Niemistö; Bogdan Dumitrescu (IEEE Signal Process. Lett., 2004)

Multistage IIR filter design using convex stability domains defined by positive realness. - Bogdan Dumitrescu; Riitta Niemistö (IEEE Trans. Signal Process., 2004)

Low-delay nonuniform oversampled filterbanks for acoustic echo control. - Bogdan Dumitrescu; Robert Bregovic; Tapio Saramäki; Riitta Niemistö (EUSIPCO, 2006)

Evaluating Artificial Bandwidth Extension by Conversational Tests in Car Using Mobile Devices with Integrated Hands-Free Functionality. - Laura Laaksonen; Ville Myllylä; Riitta Niemistö (INTERSPEECH, 2011)

Subjective Evaluation of Deep Neural Network Based Speech Enhancement Systems in Real-World Conditions. - Gaurav Naithani; Kirsi Pietilä; Riitta Niemistö; Erkki Paajanen; Tero Takala; Tuomas Virtanen (MMSP, 2022)