Timo I. Laakso

Publication Activity (10 Years)

Years Active: 1991-2014
Publications (10 Years): 0

Top Topics

Quantization Noise

Noise Detection

Edge Preservation

Top Venues

IEEE Trans. Circuits Syst. I Regul. Pap.

Publications

Henri Ruotsalainen, Holger Arthaber, Timo I. Laakso, Gottfried Magerl
Quantization Noise Reduction Techniques for Digital Pulsed RF Signal Generation Based on Quadrature Noise Shaped Encoding. IEEE Trans. Circuits Syst. I Regul. Pap. (9) (2014)
Ernst Aschbacher, Mei Yen Cheong, Peter Brunmayr, Markus Rupp, Timo I. Laakso
Prototype Implementation of Two Efficient Low-Complexity Digital Predistortion Algorithms. EURASIP J. Adv. Signal Process. 2008 (2008)
Heidi-Maria Lehtonen, Vesa Välimäki, Timo I. Laakso
Canceling and Selecting Partials from Musical Tones Using Fractional-Delay Filters. Comput. Music. J. 32 (2) (2008)
Fernando H. Gregorio, Stefan Werner, Timo I. Laakso, Juan E. Cousseau
Receiver Cancellation Technique for Nonlinear Power Amplifier Distortion in SDMA-OFDM Systems. IEEE Trans. Veh. Technol. 56 (5) (2007)
José L. Figueroa, Juan E. Cousseau, Stefan Werner, Timo I. Laakso
Adaptive control of a Wiener type system: application of a pH Neutralization reactor. Int. J. Control 80 (2) (2007)
Juan E. Cousseau, Jose L. Figueroa, Stefan Werner, Timo I. Laakso
Efficient Nonlinear Wiener Model Identification Using a Complex-Valued Simplicial Canonical Piecewise Linear Filter. IEEE Trans. Signal Process. 55 (5-1) (2007)
Chin-Liang Wang, Timo I. Laakso, Juan E. Cousseau
Receiver Cancellation of Nonlinear Power Amplifier Distortion in SDMA-OFDM Systems. ICASSP (4) (2006)
Mobien Shoaib, Stefan Werner, José Antonio Apolinário, Timo I. Laakso
Solution to the Weight Extraction Problem in Fast QR-Decomposition RLS Algorithms. ICASSP (3) (2006)
Mobien Shoaib, Stefan Werner, José Antonio Apolinário, Timo I. Laakso
Multichannel fast QR-decomposition RLS algorithms with explicit weight extraction. EUSIPCO (2006)
Mobien Shoaib, Stefan Werner, J. A. Apolinário Jr., Timo I. Laakso
Equivalent output-filtering using fast QRD-RLS algorithm for burst-type training applications. ISCAS (2006)
Mei Yen Cheong, Stefan Werner, Timo I. Laakso, Juan E. Cousseau, José Luis Figueroa
Predistorter design employing parallel piecewise linear structure and inverse coordinate mapping for broadband communications. EUSIPCO (2006)
Fernando H. Gregorio, Stefan Werner, Juan E. Cousseau, Timo I. Laakso
Iterative Channel Estimation for Multiuser OFDM Systems in the Presence of Power Amplifier Nonlinearities. PIMRC (2006)
Martin Makundi, Are Hjørungnes, Timo I. Laakso
An interpolation-based high-precision frequency acquisition method for OFDM systems. GLOBECOM (2005)
Xiaojing Zhang, Martin Makundi, Timo I. Laakso
Closed-form design of digital fractional-delay filters with constant magnitude and variable delay. EUSIPCO (2005)
Fernando H. Gregorio, Timo I. Laakso
A novel carrier allocation method for multiuser OFDM system with amplifier nonlinearities. EUSIPCO (2005)
Fernando H. Gregorio, Juan E. Cousseau, Timo I. Laakso
RFI cancellation in VDSL systems using a novel complex allpass-based IIR adaptive notch filter. EUSIPCO (2005)
Stefan Werner, José Antonio Apolinário, Paulo S. R. Diniz, Timo I. Laakso
A set-membership approach to normalized proportionate adaptation algorithms. EUSIPCO (2005)
Martin Makundi, Timo I. Laakso, Are Hjørungnes
Iterative symbol synchronization using variable IIR and FIR fractional-delay filters with arbitrary oversampling ratios. ISWCS (2004)
Martin Makundi, Timo I. Laakso, Are Hjørungnes
Generalized symbol synchronization using variable IIR and FIR fractional-delay filters with arbitrary oversampling ratios. ICASSP (2) (2004)
Martin Makundi, Timo I. Laakso
Efficient symbol synchronization techniques using variable FIR or IIR interpolation filters. ISCAS (3) (2003)
Yaohui Liu, Paulo S. R. Diniz, Timo I. Laakso
Cascaded-parallel adaptive notch filter based on orthogonal decomposition. ISCAS (4) (2003)
Martin Makundi, Timo I. Laakso, Yaohui Liu
Asynchronous implementation of transient suppression in tunable IIR filters. DSP (2002)
Martin Makundi, Vesa Välimäki, Timo I. Laakso
Closed-form design of tunable fractional-delay allpass filter structures. ISCAS (4) (2001)
Yaohui Liu, Paulo S. R. Diniz, Timo I. Laakso
Adaptive Steiglitz-McBride notch filter design for radio interference suppression in VDSL systems. GLOBECOM (2001)
Timo I. Laakso, Andrzej Tarczynski, N. Paul Murphy, Vesa Välimäki
Polynomial filtering approach to reconstruction and noise reduction of nonuniformly sampled signals. Signal Process. 80 (4) (2000)
Vesa Välimäki, Timo I. Laakso
Principles of fractional delay filters. ICASSP (2000)
Kimmo Kettunen, Timo I. Laakso
Iterative multiuser receiver utilizing soft decoding information. ICC (1999)
Timo I. Laakso, Vesa Välimäki
Energy-based effective length of the impulse response of a recursive filter. IEEE Trans. Instrum. Meas. 48 (1) (1999)
José Antonio Apolinário, Stefan Werner, Paulo S. R. Diniz, Timo I. Laakso
Constrained normalized adaptive filters for CDMA mobile communications. EUSIPCO (1998)
Stefan Werner, Timo I. Laakso, Jorma Lilleberg
Adaptive multiple-antenna receiver for CDMA mobile reception. ICC (1998)
Vesa Välimäki, Timo I. Laakso
Suppression of transients in variable recursive digital filters with a novel and efficient cancellation method. IEEE Trans. Signal Process. 46 (12) (1998)
Timo I. Laakso, Vesa Välimäki
Energy-based effective length of the impulse response of a recursive filter. ICASSP (1998)
José Antonio Apolinário, Paulo S. R. Diniz, Timo I. Laakso, Marcello L. R. de Campos
Step-size optimization of the BNDR-LMS algorithm. EUSIPCO (1998)
Vesa Välimäki, Timo I. Laakso
Suppression of transients in time-varying recursive filters for audio signals. ICASSP (1998)
Ramin Baghaie, Stefan Werner, Timo I. Laakso
Relaxed look-ahead technique for pipelined implementation of adaptive multiple-antenna CDMA mobile receivers. EUSIPCO (1998)
Ramin Baghaie, Stefan Werner, Timo I. Laakso
Pipelined implementation of adaptive multiple-antenna CDMA mobile receivers. ICASSP (1998)
P. T. Karttunen, Timo I. Laakso, Joseph Lilleberg
Tracking of mobile users in a mobile communications system using adaptive convergence parameter. PIMRC (1997)
Timo I. Laakso, Seppo J. Ovaska
Prefiltering approach for optimal polynomial prediction. IEEE Trans. Signal Process. 44 (3) (1996)
Juha Kauraniemi, Timo I. Laakso
Elimination of limit cycles in a direct form delta operator filter. EUSIPCO (1996)
P. Taneli Harju, Timo I. Laakso, Seppo J. Ovaska
Applying IIR predictors on Rayleigh fading signal. Signal Process. 48 (1) (1996)
Timo I. Laakso, Vesa Välimäki, Matti Karjalainen, Unto K. Laine
Splitting the unit delay [FIR/all pass filters design]. IEEE Signal Process. Mag. 13 (1) (1996)
Juha Kauraniemi, Timo I. Laakso, Iiro Hartimo, Seppo J. Ovaska
Roundoff noise minimization in a direct form delta operator structure. ICASSP (1996)
Denise M. Bland, Timo I. Laakso, Andrzej Tarczynski
Application of NUT-DFT for resampling nonuniformly sampled signals. ICECS (1996)
Vesa Välimäki, Timo I. Laakso, Jonathan P. Mackenzie
Elimination of Transients in Time-Varying Allpass Fractional Delay Filteres with Applications to Digital Waveguide Modeling. ICMC (1995)
Timo I. Laakso, Vesa Välimäki, Jukka Henriksson
Tunable downsampling using fractional delay filters with applications to digital TV transmission. ICASSP (1995)
Timo I. Laakso, Markus Lang, Tapio Saramäki
Design of Limit-Cycle-Free Recursive Transfer Functions for Fixed-Point Direct Form Implementation. ISCAS (1994)
Truong Q. Nguyen, Timo I. Laakso, T. Engin Tuncer
On Perfect-Reconstruction Allpass-Based Cosine-Modulated IIR Filter Banks. ISCAS (1994)
Truong Q. Nguyen, Timo I. Laakso, Ravinder David Koilpillai
Eigenfilter approach for the design of allpass filters approximating a given phase response. IEEE Trans. Signal Process. 42 (9) (1994)
Philip E. Luft, Timo I. Laakso
Adaptive Control of Sampling Rate Using a Local Time-Domain Sampling Theorem. ISCAS (1994)
Vesa Välimäki, Matti Karjalainen, Timo I. Laakso
Modeling of Woodwind Bores with Finger Holes. ICMC (1993)
Timo I. Laakso, Seppo J. Ovaska, Olli Vainio
Implementation of a time-varying MIMO system with error feedback. Signal Process. 33 (1) (1993)
Vesa Välimäki, Matti Karjalainen, Timo I. Laakso
Fractional delay digital filters. ISCAS (1993)
Timo I. Laakso
Elimination of limit cycles in direct form digital filters using error feedback. Int. J. Circuit Theory Appl. 21 (2) (1993)
Timo I. Laakso, T. Q. Nguyen, Ravinder David Koilpillai
Designing allpass filters using the eigenfilter method. ICASSP (3) (1993)
Timo I. Laakso, Seppo J. Ovaska
Optimal polynomial predictors with application specific prefilters. ISCAS (1993)
Timo I. Laakso, Iiro Hartimo
Noise reduction in recursive digital filters using high-order error feedback. IEEE Trans. Signal Process. 40 (5) (1992)
Timo I. Laakso, Vesa Välimäki, Matti Karjalainen, Unto K. Laine
Real-Time Implementation Techniques for a Continuously Variable Digital Delay in Modeling Musical Instruments. ICMC (1992)
Bing Zeng, Timo I. Laakso, Iiro Hartimo, Yrjö Neuvo
Error feedback for floating-point cascade-form digital filters. ICASSP (1991)
Matti Karjalainen, Unto K. Laine, Timo I. Laakso, Vesa Välimäki
Transmission-Line Modeling and Real-Time Synthesis of String and Wind Instruments. ICMC (1991)
Timo I. Laakso, Paulo S. R. Diniz, Iiro Hartimo
General criterion for the absence of limit cycles in filter structures with a single quantizer. ICASSP (1991)