Tor A. Ramstad

Publication Activity (10 Years)

Years Active: 1979-2024
Publications (10 Years): 3

Top Topics

Propagation Model

Error Resilience

Multivariate Gaussian

Top Venues

IEEE Trans. Inf. Theory

IEEE J. Biomed. Health Informatics

Publications

Pål Anders Floor, Tor A. Ramstad
Shannon-Kotel'nikov Mappings for Analog Point-to-Point Communications. IEEE Trans. Inf. Theory 70 (4) (2024)
Pål Anders Floor, Raúl Chávez-Santiago, Anna N. Kim, Kimmo Kansanen, Tor A. Ramstad, Ilangko Balasingham
Communication Aspects for a Measurement Based UWB in-Body to on-Body Channel. IEEE Access 7 (2019)
Hieu T. Nguyen, Tor A. Ramstad, Ilangko Balasingham
Layered source-channel coding for uniformly distributed sources over parallel fading channels. PIMRC (2016)
Pål Anders Floor, Anna N. Kim, Tor A. Ramstad, Ilangko Balasingham, Niklas Wernersson, Mikael Skoglund
On Joint Source-Channel Coding for a Multivariate Gaussian on a Gaussian MAC. IEEE Trans. Commun. 63 (5) (2015)
Pål Anders Floor, Raúl Chávez-Santiago, Sverre Brovoll, Øyvind Aardal, Jacob Bergsland, Ole-Johannes H. N. Grymyr, Per Steinar Halvorsen, Rafael Palomar, Dirk Plettemeier, Svein-Erik Hamran, Tor A. Ramstad, Ilangko Balasingham
In-Body to On-Body Ultrawideband Propagation Model Derived From Measurements in Living Animals. IEEE J. Biomed. Health Informatics 19 (3) (2015)
Pål Anders Floor, Anna N. Kim, Tor A. Ramstad, Ilangko Balasingham, Niklas Wernersson, Mikael Skoglund
Zero-Delay Joint Source-Channel Coding for a Multivariate Gaussian on a Gaussian MAC. CoRR (2014)
Emrah Akyol, Kumar Viswanatha, Kenneth Rose, Tor A. Ramstad
On Zero-Delay Source-Channel Coding. IEEE Trans. Inf. Theory 60 (12) (2014)
Babak Moussakhani, John T. Flåm, Tor A. Ramstad, Ilangko Balasingham
On change detection in a Kalman filter based tracking problem. Signal Process. 105 (2014)
Emrah Akyol, Kumar Viswanatha, Kenneth Rose, Tor A. Ramstad
On zero delay source-channel coding: Functional properties and linearity conditions. ISIT (2013)
Emrah Akyol, Kumar Viswanatha, Kenneth Rose, Tor A. Ramstad
On Zero Delay Source-Channel Coding CoRR (2013)
Pål Anders Floor, Anna N. Kim, Tor A. Ramstad, Ilangko Balasingham
Zero Delay Joint Source Channel Coding for Multivariate Gaussian Sources over Orthogonal Gaussian Channels. Entropy 15 (6) (2013)
Babak Moussakhani, Mohammad Ali Sedaghat, John T. Flåm, Tor A. Ramstad
On optimal detection for matrix multiplicative data hiding. IH&MMSec (2013)
Babak Moussakhani, Tor A. Ramstad, John T. Flåm, Ilangko Balasingham
On localizing a capsule endoscope using magnetic sensors. EMBC (2012)
Anna N. Kim, Pål Anders Floor, Tor A. Ramstad, Ilangko Balasingham
Communication using ultra wide-band pulse position modulation for in-body sensors. BODYNETS (2012)
Reza Parseh, Santiago Sanchez Acevedo, Kimmo Kansanen, Marta Molinas, Tor A. Ramstad
Real-time compression of measurements in distribution grids. SmartGridComm (2012)
Hieu T. Nguyen, Tor A. Ramstad, Ilangko Balasingham
A Robust Communication System Based on Joint-Source Channel Coding for a Uniform Source. VTC Fall (2012)
Hieu T. Nguyen, Tor A. Ramstad, Ilangko Balasingham
Optimal and robust communication for a uniform source. IET Commun. 6 (6) (2012)
Hieu T. Nguyen, Tor A. Ramstad, Ilangko Balasingham
Sum-rate distortion bound for suboptimal multiterminal source coding applied in medical wireless sensor networks. BODYNETS (2012)
Anna N. Kim, Eirik Jenssen Daling, Tor A. Ramstad, Ilangko Balasingham
Error concealment and post processing for the capsule endoscope. BODYNETS (2012)
Pål Anders Floor, Anna N. Kim, Tor A. Ramstad, Ilangko Balasingham
On transmission of multiple Gaussian sources over a Gaussian MAC using a VQLC mapping. ITW (2012)
Babak Moussakhani, John T. Flåm, Stig Støa, Ilangko Balasingham, Tor A. Ramstad
On localisation accuracy inside the human abdomen region. IET Wirel. Sens. Syst. 2 (1) (2012)
Pål Anders Floor, Anna N. Kim, Niklas Wernersson, Tor A. Ramstad, Mikael Skoglund, Ilangko Balasingham
Zero-Delay Joint Source-Channel Coding for a Bivariate Gaussian on a Gaussian MAC. IEEE Trans. Commun. 60 (10) (2012)
Hieu T. Nguyen, Tor A. Ramstad, Ilangko Balasingham
Coded pulse position modulation communication system over the human abdominal channel for medical wireless body area networks. PIMRC (2012)
Pål Anders Floor, Anna N. Kim, Tor A. Ramstad, Ilangko Balasingham, Niklas Wernersson, Mikael Skoglund
Transmitting multiple correlated gaussian sources over a Gaussian MAC using delay-free mappings. ISABEL (2011)
Anna N. Kim, Tor A. Ramstad, Ilangko Balasingham
Very low complexity low rate image coding for the wireless endoscope. ISABEL (2011)
Anna N. Kim, Pål Anders Floor, Tor A. Ramstad, Ilangko Balasingham
Delay-Free Joint Source-Channel Coding for Gaussian Network of Multiple Sensors. ICC (2011)
Hieu T. Nguyen, Tor A. Ramstad, Ilangko Balasingham
Wireless sensor communication system based on direct-sum source coder. IET Wirel. Sens. Syst. 1 (2) (2011)
Pål Anders Floor, Anna N. Kim, Niklas Wernersson, Tor A. Ramstad, Mikael Skoglund, Ilangko Balasingham
On Transmission of Two Correlated Gaussian Memoryless Sources over a Gaussian MAC using Delay-Free Mappings CoRR (2011)
Pål Anders Floor, Anna N. Kim, Niklas Wernersson, Tor A. Ramstad, Mikael Skoglund, Ilangko Balasingham
Distributed zero-delay joint source-channel coding for a bi-variate Gaussian on a Gaussian MAC. EUSIPCO (2011)
Babak Moussakhani, Ilangko Balasingham, Tor A. Ramstad
Distributed Signal Estimation Using Binary Sensors with Multiple Thresholds. VTC Spring (2010)
Anna N. Kim, Tor A. Ramstad
Bandwidth Expansion in a Simple Gaussian Sensor Network Using Feedback. DCC (2010)
Emrah Akyol, Kenneth Rose, Tor A. Ramstad
Optimized Analog Mappings for Distributed Source-Channel Coding. DCC (2010)
Hieu T. Nguyen, Ilangko Balasingham, Tor A. Ramstad, Pål Anders Floor
Limited Feedback Transmission Scheme for Wireless Sensor Networks. ICC (2010)
Pål Anders Floor, Tor A. Ramstad
On the Analysis of Shannon-Kotel'nikov Mappings CoRR (2009)
Fredrik Hekland, Pål Anders Floor, Tor A. Ramstad
Shannon-kotel-nikov mappings in joint source-channel coding. IEEE Trans. Commun. 57 (1) (2009)
Minh-Long Pham, Tor A. Ramstad, Ilangko Balasingham
Poster abstract: Ultra wideband biomedical wireless sensor neworks using wavelet lifting for image transmission. IPSN (2009)
Minh-Long Pham, Tor A. Ramstad, Ilangko Balasingham
Minimizing Power Using Large Bandwidth PPM Transmission and DPCM Source Coding. VTC Spring (2009)
Niklas Wernersson, Mikael Skoglund, Tor A. Ramstad
Polynomial based analog source-channel codes - [transactions papers]. IEEE Trans. Commun. 57 (9) (2009)
Ilangko Balasingham, Tor A. Ramstad
Are the Wavelet Transforms the Best Filter Banks for Image Compression? EURASIP J. Image Video Process. 2008 (2008)
Pål Anders Floor, Tor A. Ramstad, Niklas Wernersson
Power Constrained Channel Optimized Vector Quantizers used for Bandwidth Expansion. ISWCS (2007)
Anna N. Kim, Tor A. Ramstad
Improving the Rate-Distortion Performance of DPCM Using Multirate Processing With Application in Low-Rate Image Coding. IEEE Trans. Signal Process. 55 (10) (2007)
Stig Støa, Ilangko Balasingham, Tor A. Ramstad
Data Throughput Optimization in the IEEE 802.15.4 Medical Sensor Networks. ISCAS (2007)
Fredrik Hekland, Tor A. Ramstad
Digitising the 2: 1 Shannon Mappings for Transport over Heterogeneous Networks. DCC (2006)
Greg H. Håkonsen, Tor A. Ramstad
Image Transmission Over Flat Fading Channels Using Joint Source Channel Coding. DCC (2006)
Greg H. Håkonsen, Tor A. Ramstad, Anders Gjendemsjø
Image Transmission With Adaptive Power and Rate Allocation Over Flat Fading Channels Using Joint Source Channel Coding. WINSYS (2006)
Pål Anders Floor, Tor A. Ramstad
Noise Immunity for 1: N and M: 1 Nonlinear Mappings for Source-Channel Coding. DCC (2006)
Greg H. Håkonsen, Tor A. Ramstad, Anders Gjendemsjø
Image Transmission with Adaptive Power and Rate Allocation over Flat Fading Channels Using Joint Source Channel Coding. ICETE (Selected Papers) (2006)
Fredrik Hekland, Geir E. Øien, Tor A. Ramstad
Using 2: 1 Shannon Mapping for Joint Source-Channel Coding. DCC (2005)
Anna N. Kim, Stefania Sesia, Tor A. Ramstad, Giuseppe Caire
Combined error protection and compression using turbo codes for error resilient image transmission. ICIP (3) (2005)
Stian Johansen, Andrew Perkis, Tor A. Ramstad, Ajit S. Bopardikar
Fine-granular scalable and error resilient audio coding by tree-structured quantization. ICASSP (4) (2004)
Anna N. Kim, Tor A. Ramstad
Practical low bit rate predictive image coder using multi-rate processing and adaptive entropy coding. ICIP (2004)
Anna N. Kim, Tor A. Ramstad
Improving the rate-distortion performance of DPCM. ISSPA (1) (2003)
Anna N. Kim, Tor A. Ramstad
Comparing performance of entropy constrained scalar quantizer and other scalar quantizers. DSP (2002)
Helge Coward, Tor A. Ramstad
Quantizer optimization in hybrid digital-analog transmission of analog source signals. ICASSP (2000)
Are Hjørungnes, Helge Coward, Tor A. Ramstad
Minimum Mean Square Error Fir Filter Banks with Arbitrary Filter Lengths. ICIP (1) (1999)
Are Hjørungnes, Tor A. Ramstad
Algorithm for jointly optimized analysis and synthesis FIR filter banks. ICECS (1999)
Tage Røsten, Viktor A. Marthinussen, Tor A. Ramstad, Andrew Perkis
Filter bank optimization for high-dimensional compression of pre-stack seismic data. ICASSP (1999)
Are Hjørungnes, Tor A. Ramstad
Jointly optimal analysis and synthesis filter banks for bit constrained source coding. ICASSP (1998)
Ilangko Balasingham, Michael D. Adams, Tor A. Ramstad, Faouzi Kossentini, Helge Coward, Andrew Perkis, Geir E. Øien
Performance Evaluation of Different Filter Banks in the JPEG-2000 Baseline System. ICIP (2) (1998)
Tor A. Ramstad
Fractional rate decimator and interpolator design. EUSIPCO (1998)
Ingil Sundsbo, Tor A. Ramstad
Synthesis filterbank with low hardware complexity for subband image coding. IEEE Trans. Image Process. 7 (12) (1998)
Tage Røsten, Tor A. Ramstad
Kirchhoff Migration of 2-D Post-Stack Seismic Data after Subband Decomposition. ICIP (3) (1998)
Ilangko Balasingham, John M. Lervik, Tor A. Ramstad
Lossless image compression using integer coefficient filter banks and class-wise arithmetic coding. ICASSP (1998)
Arild Fuldseth, Tor A. Ramstad
Bandwidth compression for continuous amplitude channels based on vector approximation to a continuous subset of the source signal space. ICASSP (1997)
Arild Fuldseth, Ilangko Balasingham, Tor A. Ramstad
Efficient Coding of the Classification Table in Low Bit Rate Subband Image Coding by Use of Hierarchical Enumeration. ICIP (2) (1997)
Arild Fuldseth, Tor A. Ramstad
Channel-optimized subband video coding for channels with a power constraint. ICIP (3) (1997)
Ilangko Balasingham, Tor A. Ramstad, John M. Lervik
Survey of odd and even length filters in tree-structured filter banks for subband image compression. ICASSP (1997)
Ilangko Balasingham, Arild Fuldseth, Tor A. Ramstad
On Optimal Tiling of the Spectrum in Subband Image Compression. ICIP (1) (1997)
John M. Lervik, Tor A. Ramstad
Optimality of multiple entropy coder systems for nonstationary sources modelled by a mixture distribution. ICASSP (1996)
Ingil Sundsbo, Tor A. Ramstad
Low complexity synthesis filter bank for subband coding of images. EUSIPCO (1996)
Arild Fuldseth, Tor A. Ramstad
Combined video coding and multilevel modulation. ICIP (1) (1996)
Ilangko Balasingham, Tor A. Ramstad
Optimized perfect reconstruction tree-structured filter banks for image coding. ICIP (1) (1996)
Arild Fuldseth, Tor A. Ramstad
Subband video coding with smooth motion compensation. ICASSP (1996)
Sven Ole Aase, Tor A. Ramstad
On the optimality of nonunitary filter banks in subband coders. IEEE Trans. Image Process. 4 (12) (1995)
Arild Fuldseth, Tor A. Ramstad
A new error criterion for block based motion estimation. ICIP (3) (1995)
Ryszard Stasinski, Tor A. Ramstad
Fast algorithms for interpolation and decimation filter banks. ICASSP (3) (1994)
John M. Lervik, Tor A. Ramstad
An analog interpretation of compression for digital communication systems. ICASSP (5) (1994)
John M. Lervik, Tor A. Ramstad
Optimal Entropy Coding in Image Subband Coders. ICIP (2) (1994)
Sven Ole Aase, Tor A. Ramstad
Parallel FIR filter banks for robust subband image coding. ICASSP (5) (1993)
Skjalg Lepsøy, Geir Egil Øien, Tor A. Ramstad
Attractor image compression with a fast non-iterative decoding algorithm. ICASSP (5) (1993)
Sven Ole Aase, Tor A. Ramstad
Ringing reduction in low bit-rate image subband coding using projection onto a space of paraboloids. Signal Process. Image Commun. 5 (3) (1993)
Geir E. Øien, Skjalg Lepsøy, Tor A. Ramstad
An inner product space approach to image coding by contractive transformations. ICASSP (1991)
Tor A. Ramstad, Joar P. Tanem
Cosine-modulated analysis-synthesis filterbank with critical sampling and perfect reconstruction. ICASSP (1991)
Bernt Ribbum, Andrew Perkis, Kuldip K. Paliwal, Tor A. Ramstad
Performance study of stochastic speech coders. Speech Commun. 10 (3) (1991)
John Håkon Husøy, Hakon Gronning, Tor A. Ramstad
Subband coding of video employing efficient recursive filter banks and advanced motion compensation. VCIP (1990)
Hakon Gronning, John Håkon Husøy, Tor A. Ramstad
Image subband coding using an efficient recursive filter bank with complex signals. VCIP (1990)
Tor A. Ramstad
Considerations on quantization and dynamic bit-allocation in subband coders. ICASSP (1986)
Lars M. Lundheim, Tor A. Ramstad
Variable rate coding for speech storage. ICASSP (1986)
Allen Gersho, Tor A. Ramstad, I. Versvik
Fully vector-quantized subband coding with adaptive codebook allocation. ICASSP (1984)
Tor A. Ramstad
Digital Two-Rate IIR and Hybrid IIR/FIR Filters for Sampling Rate Conversion. IEEE Trans. Commun. 30 (7) (1982)
Tor A. Ramstad
Sample-rate conversion by arbitrary ratios. ICASSP (1982)
Tor A. Ramstad
Sub-band coder with a simple adaptive bit-allocation algorithm a possible candidate for digital mobile telephony? ICASSP (1982)
Tor A. Ramstad
Some considerations on coefficient sensitivity and noise in direct form IIR interpolators and decimators. ICASSP (1979)