Browsing ECE Publications by Author "Sengupta, Chaitali"
Now showing items 1-21 of 21
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On Multipath Channel Estimation for CDMA Systems Using Multiple Sensors
(2001-03-20)This paper focuses on the design of a multiuser receiver structure for the reverse link of a code-division multiple-access communication system, in the presence of multipath effects and using an antenna array at the base ... -
Arithmetic Acceleration Techniques for Wireless Communication Receivers
(1999-10-20)We develop techniques to accelerate the implementation of the next generation wireless communication algorithms in hardware. We discuss an implementation of a key computationally intensive baseband algorithm for joint ... -
Efficient Multiuser Receivers for CDMA Systems
(1999-09-20)We focus on the design of multiuser receiver structures for Code Division Multiple Access (CDMA) communication systems, in the presence of multipath elects and multiple sensors at the base station receiver. We present a ... -
Joint Multiuser Channel Estimation and Detection for CDMA Systems
(1999-02-20)We focus on the design of multiuser receiver structures for Code Division Multiple Access (CDMA) communication systems, in the presence of multipath effects and multiple sensors at the base station receiver. The joint ... -
Algorithms and Architectures for Channel Estimation in Wireless CDMA Communication Systems
(1998-12-20)Wireless cellular communication is witnessing a rapid growth in markets, technology, and range of services. An attractive approach for economical, spectrally efficient, and high quality digital cellular and personal ... -
Subspace-based Tracking of Multipath Channel Parameters for CDMA Systems
(1998-09-20)In this paper, we evaluate several issues in the application of subspace based methods to tracking channel parameters in Code Division Multiple Access (CDMA) communication systems, in the presence of multipath fading. We ... -
Maximum Likelihood Multipath Channel Parameter Estimation in CDMA Systems Using Antenna Arrays
(1998-09-20)The problem addressed in this paper is the estimation of the chan-nel parameters in a Code Division Multiple Access (CDMA) communication system, in the presence of multipath effects and multiple sensors at the base station ... -
Hardware design issues for a mobile unit for next generation CDMA systems
(1998-07-20)This paper addresses hardware design issues of a mobile receiver for future generation direct sequence CDMA wireless communication systems. In the design of a mobile unit, fixed-point hardware is an attractive alternative ... -
Fixed Point Error Analysis Of Multiuser Detection and Synchronization Algorithms For CDMA Communication Systems
(1998-04-20)Conventional correlation based single-user techniques for Direct Sequence Code Division Multiple Access (DS-CDMA) wireless communication systems are susceptible to performance degradation due to interference from other ... -
Maximum Likelihood Multipath Channel Parameter Estimation in CDMA Systems
(1998-03-01)The problem addressed in this paper is the estimation of the channel parameters in a Code Division Multiple Access(CDMA) communication system, in the presence of multipath effects. Maximum likelihood estimation of these ... -
Automated Evaluation of Critical Features in VLSI Layouts Based on Photolithographic Simulations
(IEEE, 1997-11-01)In this paper, we address the problem of identifying and evaluating “critical features” in an integrated circuit (IC) layout. The “critical features” (e.g., nested elbows and open ends) are areas in the layout that are ... -
Tracking Fading Multipath Channel Parameters, in CDMA Systems, Using a Subspace-based Method - An Implementation Perspective
(1997-10-01)In this paper, we evaluate several implementation issues in the application of subspace based methods to tracking channel parameters in code division multiple access (CDMA) communication systems, in the presence of multipath ... -
Parallel algorithms and architectures for subspace based channel estimation for CDMA communication systems
(1996-08-20)This paper presents an overview and results from an ongoing research project to study parallel algorithms for the acquisition of Code Division Multiple Access (CDMA) communication signals. The goal of this research isto ... -
An Integrated CAD Framework Linking VLSI Layout Editors and Process Simulators
(SPIE, 1996-03-01)As feature sizes in VLSI circuits extend into the far sub-micron range, new process techniques, such as using phase shifting masks for photolithography, will be needed. Under these conditions, the only means for the circuit ... -
Automated Evaluation of Critical Features in VLSI Layouts Based on Photolithographic Simulations
(SME Press, 1996-01-01)This paper describes a CAD tool (An Integrated CAD Framework) which links VLSI layout editors to lithographic simulators and provides information on the simulated resolution of a feature to the circuit designer. The designer ... -
Enhanced Microlithography Using Combined Phase Shifting and Off-axis Illumination
(Japanese Journal of Applied Physics, 1995-12-01)Off-axis illumination is a promising optical microlithography technique which can be used to improve the image quality of line-space patterns. With this method the image is produced by the zero and first order diffracted ... -
Ultrahigh Resolution Lithography with Excimer Lasers
(Kluwer Academic Publishers, 1995-07-01)The photolithography process is central to integrated circuit fabrication. Through this process an integrated circuit is patterned by imaging a photomask onto a layer of photoresist. The light source currently being used ... -
An Integrated CAD Framework Linking VLSI Layout Editors and Process Simulators
(1995-05-20)This thesis presents an Integrated CAD Framework which links VLSI layout editors to lithographic simulators and provides information on the simulated resolution of a feature to the circuit designer. This will help designers ... -
A New Phase Shifting Technique for Deep UV Excimer Laser Based Lithography
(SPIE, 1995-02-01)This paper reports simulation and experimental details of a novel phase shifting technique based o laser interferometry. Phase shifting is one of the most promising techniques for the fabrication of high density DRAM's. ... -
A New Interferometric Phase-Shifting Technique for Sub-half-micron Laser Microlithography
(SPIE, 1995-02-01)This paper reports recent progress in achieving sub-half-micron feature sizes with UV laser illumination based on a novel interferometric phase shifting (IPS) technique. In the IPS arrangement, the intensity and amount of ...
