- Date & Time: Thursday, June 2, 2011; 12:00 PM
Speaker: Ramesh Annavajjala, MERL
MERL Host: Philip V. Orlik Abstract - For orthogonal frequency-division multiplexing (OFDM) based wireless systems, a resource block (RB) in a two-dimensional time-frequency plane is defined as a data block spanned by a number of consecutive OFDM symbols over a number of consecutive subcarriers. Traditionally, RBs contain modulation symbols for data transmission and pilot symbols for channel estimation.
In this talk, I present a novel approach to RB designs for OFDM systems with multiple antennas at the transmitter and the receiver (i.e., MIMO-OFDM). The proposed approach, termed resource block embedding, does not require explicit pilot symbols to estimate the channel at the receiver, and hence reduces the channel estimation overhead significantly. I describe, in detail, the encoding and decoding algorithms for our proposed embedded resource blocks (ERB) for single-user single-antenna transmission, two transmitter antenna Alamouti code, four transmitter antenna stacked Alamouti code, and multi-stream spatial multiplexing. I also outline construction of ERBs for multi-user MIMO systems.
This is a joint work with Phil Orlik and Jin Zhang.
-
- Date: May 23, 2011
Where: IEEE Transactions on Information Theory
MERL Contact: Petros T. Boufounos
Research Area: Computational Sensing
Brief - The article "Sparse Recovery from Combined Fusion Frame Measurements" by Boufounos, P.T., Kutyniok, G. and Rauhut, H. was published in IEEE Transactions on Information Theory.
-
- Date: May 23, 2011
Where: IEEE Radar Conference (RadarCon)
Research Area: Signal Processing
Brief - The paper "Low Complexity STAP via Subspace Tracking in Compound-Gaussian Environment" by Wang, P., Pun, M.O. and Sahinoglu, Z. was presented at the IEEE Radar Conference (RadarCon).
-
- Date: May 22, 2011
Where: IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)
MERL Contact: Petros T. Boufounos Brief - The papers "Compressive Sensing for Over-the-Air Ultrasound" by Boufounos, P.T., "Privacy Preserving Probabilistic Inference with Hidden Markov Models" by Pathak, M., Rane, S., Sun, W. and Raj, B., "Saturation-robust SAR Image Formation" by Wei, D. and Boufounos, P.T. and "Scale-Invariant GLRT in Stochastic Partially Homogeneous Environments" by Wang, P., Sahinoglu, Z., Pun, M.-O., Li, H. and Himed, B. were presented at the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP).
-
- Date: May 15, 2011
Where: IEEE International Symposium on Circuits and Systems (ISCAS)
MERL Contact: Anthony Vetro
Research Area: Digital Video
Brief - The paper "Efficient Dictionary Based Video Coding with Reduced Side Information" by Kang, J.-W., Kuo, C.-C. J., Cohen, R. and Vetro, A. was presented at the IEEE International Symposium on Circuits and Systems (ISCAS).
-
- Date: May 15, 2011
Where: IEEE Vehicular Technology Conference (VTC)
Research Area: Communications
Brief - The paper "Performance Evaluation of Cross-Polarized Antenna Selection over 2 GHz Measurement-Based Channel Models" by Nishimoto, H., Taira, A., Kubo, H., Pun, M.O., Annavajjala, R. and Molisch, A.F. was presented at the IEEE Vehicular Technology Conference (VTC).
-
- Date: May 12, 2011
Where: CIRP Conference on Modeling of Machining Operations
Research Area: Computer Vision
Brief - The paper "Modeling Cutting Forces for 5-Axis Machining of Sculptured Surfaces" by Boz, Y., Erdim, H. and Lazoglu, I. was presented at the CIRP Conference on Modeling of Machining Operations.
-
- Date: May 9, 2011
Where: IEEE International Conference on Robotics and Automation (ICRA)
Research Area: Computer Vision
Brief - The papers "Pose Estimation using Both Points and Lines for Geo-Localization" by Ramalingam, S., Bouaziz, S. and Sturm, P. and "Finding a Needle in a Specular Haystack" by Shroff, N., Taguchi, Y., Tuzel, O., Veeraraghavan, A., Ramalingam, S. and Okuda, H. were presented at the IEEE International Conference on Robotics and Automation (ICRA).
-
- Date: May 2, 2011
Where: International Conference on Sampling Theory and Applications (SampTA)
MERL Contact: Petros T. Boufounos
Research Area: Computational Sensing
Brief - The paper "Hierarchical Distributed Scalar Quantization" by Boufounos, P.T. was presented at the International Conference on Sampling Theory and Applications (SampTA).
-
- Date: Sunday, May 1, 2011
MERL Contact: Anthony Vetro Brief - Anthony Vetro is Guest Editor for the Special Issue on Distributed Image Processing and Communications of the IEEE Signal Processing Magazine.
-
- Date: April 27, 2011
Where: SPIE Defense, Security and Sensing, Algorithms for Synthetic Aperture Radar Imagery
MERL Contacts: Anthony Vetro; Petros T. Boufounos
Research Area: Digital Video
Brief - The paper "Low-Complexity Efficient Raw SAR Data Compression" by Rane, S., Boufounos, P., Vetro, A. and Okada, Y. was presented at SPIE Defense, Security and Sensing, Algorithms for Synthetic Aperture Radar Imagery.
-
- Date: April 21, 2011
Where: IEEE Transactions on Wireless Communications
MERL Contacts: Jinyun Zhang; Philip V. Orlik
Research Area: Communications
Brief - The article "Pilot Matrix Design for Estimating Cascaded Channels in Two-Hop MIMO Amplify-and-Forward Relay Systems" by Ma, J., Orlik, P., Zhang, J. and Li, G.Y. was published in IEEE Transactions on Wireless Communications.
-
- Date: April 21, 2011
Where: IEEE Transactions on Signal Processing
Research Area: Communications
Brief - The article "Comparative Analysis of Pilot-Assisted Distributed Co-phasing Approaches in Wireless Sensor Networks" by Chaythanya, K.V., Annavajjala, R. and Murthy, C.R. was published in IEEE Transactions on Signal Processing.
-
- Date: April 15, 2011
Where: Proceedings of the IEEE
MERL Contact: Anthony Vetro
Research Area: Digital Video
Brief - The article "Overview of the Stereo and Multiview Video Coding Extensions of the H.264/MPEG-4 AVC Standard" by Vetro, A., Wiegand, T. and Sullivan, G. J. was published in Proceedings of the IEEE.
-
- Date: April 11, 2011
Where: European Conference on Antennas and Propagation (EuCAP)
MERL Contacts: Bingnan Wang; Koon Hoo Teo; William S. Yerazunis
Research Areas: Applied Physics, Electric Systems
Brief - The paper "Wireless Power Transfer with Metamaterials" by Wang, B., Teo, K.H., Nishino, T., Yerazunis, W., Barnwell, J. and Zhang, J. was presented at the European Conference on Antennas and Propagation (EuCAP).
-
- Date: April 10, 2011
Where: Eurographics Workshop on 3D Object Retrieval
Research Area: Computer Vision
Brief - The paper "Shape Retrieval on Non-rigid 3D Watertight Meshes" by Lian, Z., Godil, A., Bustos, B., Daoudi, M., Hermans, J., Kawamura, S., Kurita, Y., Lavoua, G., Nguyen, H.V., Ohbuchi, R., Ohkita, Y., Porikli, F., Reuter, M., Sipiran, I., Smeets, P., Suetens, P., Tabia, H. and Vandermeulen, D. was presented at the Eurographics Workshop on 3D Object Retrieval.
-
- Date: April 8, 2011
Where: IEEE Transactions on Pattern Analysis and Machine Intelligence Brief - The articles "Coded Strobing Photography: Compressive Sensing of High-Speed Periodic Events" by Veeraraghavan, A.N., Reddy, D. and Raskar, R. and "Statistical Computations on Grassmann and Stiefel Manifolds for Image and Video-Based Recognition" by Turaga, P., Veeraraghavan, A., Srivastava, A. and Chellappa, R. were published in IEEE Transactions on Pattern Analysis and Machine Intelligence.
-
- Date: April 4, 2011
Where: Symposium on Simulation for Architecture and Urban Design (SimAUD)
Research Area: Computer Vision
Brief - The paper "Sensor Placement Tool for Rapid Development of Video Sensor Layouts" by Garaas, T.W. was presented at the Symposium on Simulation for Architecture and Urban Design (SimAUD).
-
- Date: Friday, April 1, 2011
MERL Contact: Anthony Vetro Brief - Anthony Vetro is Guest Editor for the Special Issue on 3D Media & Displays of the Proceedings of the IEEE.
-
- Date: March 29, 2011
Where: Data Compression Conference (DCC)
MERL Contact: Anthony Vetro
Research Area: Digital Video
Brief - The paper "Robust Learning of 2-D Separable Transforms for Next-Generation Video Coding" by Sezer, O.G., Cohen, R. and Vetro, A. was presented at the Data Compression Conference (DCC).
-
- Date: March 22, 2011
Where: IEEE Transactions on Circuits and Systems for Video Technology
MERL Contact: Anthony Vetro
Research Area: Digital Video
Brief - The article "Depth Coding Using a Boundary Reconstruction Filter for 3-D Video Systems" by Oh, K.-J., Vetro, A. and Ho, Y.-S. was published in IEEE Transactions on Circuits and Systems for Video Technology.
-
- Date: March 17, 2011
Where: IEEE Transactions on Communications
MERL Contacts: Philip V. Orlik; Toshiaki Koike-Akino
Research Area: Communications
Brief - The article "Capacity, MSE and Secrecy Analysis of Linear Block Precoding for Distributed Antenna Systems in Multi-User Frequency-Selective Fading Channels" by Koike-Akino, T., Molisch, A.F., Duan, C., Tao, Z. and Orlik, P. was published in IEEE Transactions on Communications.
-
- Date: March 15, 2011
Where: Machine Vision and Applications
Research Area: Machine Learning
Brief - The article "In-vehicle Camera Traffic Sign Detection and Recognition" by Ruta, A., Porikli, F.M., Watanabe, S. and Li, Y. was published in Machine Vision and Applications.
-
- Date: March 1, 2011
Where: IEEE Signal Processing Letters
Research Area: Communications
Brief - The article "Knowledge-Aided Adaptive Coherence Estimator in Stochastic Partially Homogeneous Environments" by Wang, P., Sahinoglu, Z., Pun, M.-O., Li, H. and Himed, B. was published in IEEE Signal Processing Letters.
-
- Date: February 15, 2011
Where: IEEE Transactions on Information Theory Brief - The article "Divide and Concur and Difference - Map BP Decoders for LDPC Codes" by Yedidia, J.S., Wang, Y. and Draper, S.C. was published in IEEE Transactions on Information Theory.
-