FPGA Implementation of Adaptive Weight Calculation Using QRD - RLS Algorithm

Abstract

Adaptive weight calculation (AWC) is required in many communication applications including adaptive beamforming, equalization, predistortion and multiple-input multiple-output (MIMO) systems. These applications involve solving over-determined systems of equations in many cases. In general, the least squares approach, e.g. Least Mean Squares (LMS), Normalized LMS (NLMS) and Recursive Least Squares (RLS), is used to find an approximate solution to these kinds of system of equations. Among them, RLS is most commonly used due to its good numerical properties and fast convergence rate. Applying QR decomposition (QRD) to perform adaptive weight calculation based on RLS avoids this problem and leads to more accurate results and efficient architectures. QR decomposition is a method for solving a set of simultaneous equations, for unknown weights, which define the beam shape. The QR decomposition technique for adaptive weight calculation is particularly suited to implementation in FPGA and FPGA cores are now available that reduce the system development time.

Authors and Affiliations

H. Rashmi Evangelin, Ms. A. S. Narmadaa

Keywords

Related Articles

Supervising Real Time Vital Signs of a Patient Using Fuzzy Logic

Over the last few decades healthcare monitoring systems have become a major concern thereby drawing attention of researchers worldwide. Due to increasing technology, the online telemedicine has proved to be cost-effecti...

A Review Paper on Virtual Reality

This paper provides us a short survey on the topic virtual reality. Virtual reality some time also called virtual environments has drawn much attention in the last few years. Extensive media coverage causes this interes...

Development of Analogue Computer for the Simulation of Linear Circuits and Systems

In order to better understand the physical world, scientists use mathematical models to predict the reaction of various physical systems, such as the motion of a mass attached to a spring, to external stimuli. Such syst...

A Review on Diverse Materials Applied For Additive Manufacturing

Additive or constructive manufacturing is a manufacturing technology in which prototypes and functional parts are built through layer by layer addition of material directly by importing the STL file from CAD software to...

Performance and Load Analysis of Lithium Ion Battery for Electric Vehicle Using Thermal Modeling in Ansys

The paper here studies about the behavior of Li-Ion Battery cell or battery pack under various fluctuating and combined loads. The thermal model of a unit cell is designed and they are assembled to form a battery pack....

Download PDF file
  • EP ID EP19595
  • DOI -
  • Views 258
  • Downloads 4

How To Cite

H. Rashmi Evangelin, Ms. A. S. Narmadaa (2015). FPGA Implementation of Adaptive Weight Calculation Using QRD - RLS Algorithm. International Journal for Research in Applied Science and Engineering Technology (IJRASET), 3(2), -. https://europub.co.uk/articles/-A-19595