Sreejeesh SG

National Institute of Electronics and Information Technology Calicut · VLSI Group

Abstract In this work, the design and development of a 128‐channel transceiver hardware for medical ultrasound imaging systems and research is presented. The proposed hardware solution integrates the analog front‐end (AFE) sections, high voltage transmit pulser sections, field programmable gate array (FPGA)‐based transmit beamforming and control lo...

Plane-wave transmission followed by parallel receive beamforming is popular among high frame rate (HFR) ultrasound (US) imaging methods. However, due to technological limitations, HFR imaging is not widely successful in clinical US. The proposed work aims to design a field-programmable gate array (FPGA)-accelerated parallel beamforming core for med...

The Minimum Variance Distortion less Response (MVDR) beamformer is an attractive alternative to conventional delay and sum (DAS) beamformers in medical ultrasound imaging. However, it is not widely employed in medical ultrasound imaging due to its computational complexity. In this paper, we intend to present a novel broadband MVDR beamformer archit...

Minimum Variance Distortion less Response (MVDR) algorithm is the key adaptive beamforming algorithm in high resolution Medical Ultrasound Imaging systems. MVDR Beamformer is a frequency domain beamformer, and each frequency sub band need to be processed to generate covariance matrix and the same is computationally costly. Though many VLSI architec...

In this work, a novel Minimum Variance Distortion less Response (MVDR) beamformer architecture in which the adaptive weight vector is computed based on modified Column wise Givens Rotation (CGR) is presented. As compared to the conventional MVDR beamformer, Quadrature Rotation Decomposition (QRD)-MVDR is suitable for hardware realizations. To impro...

Medical ultrasound scanners are amongst the most sophisticated signal processing machines in use today. The Beamformer is the brain of whole signal processing system of the scanner [1]. Beamforming allows message transmission or reception to be directed or spatially selective. It is used in receiving beamforming to concentrate the noise signals obt...

Medical ultrasound scanners are amongst the most sophisticated signal processing machines in use today. The Beamformer is the brain of whole signal processing system of the scanner [1]. Beamforming allows message transmission or reception to be directed or spatially selective. It is used in receiving beamforming to concentrate the noise signals obt...

This paper addresses the design & implementation of configurable Intellectual Property (IP) core for double error detection and single error Correction. The encoding /decoding algorithms considered in this can be implemented with a simple and faster hardware. The block can be used for coding and decoding word having any length and correct single bi...

This paper implements serial data communication using I2C (Inter-Integrated Circuit) master bus controller using a field programmable gate array (FPGA). The I2C master bus controller was interfaced with MAXIM DS1307, which act as a slave. This module was designed in Verilog HDL and simulated in Modelsim 10.1c The design was synthesized using Xilinx...

Prolonged periods of dry climatic conditions due to fluctuation in annual precipitation, may appreciably reduce the yield of the cultivation. The expenses in establishing many of these crops and their relative intolerance to drought make an effective irrigation system a necessity for profitable enterprises. The fact that majority of the crops are p...

Internal combustion engines burn fuel to create kinetic energy. The burning of fuel is basically the reaction of the fuel with the oxygen in the air. The amount of oxygen present in the cylinder is a limiting factor for the amount of fuel that can be burnt. If there's too much fuel present, not all fuel will be burnt and un-burnt fuel will be pushe...