Electronics Projects on AN EFFICIENT DLMS ADAPTIVE FIR IMPLEMENATION FOR EEG

June 12th, 2015 by admin | No Comments | Filed in 1000 Projects, ELECTRONICS PROJECTS, ENGINEERING PROJECTS

PROJECT ABSTRACT

This project presents an implementation of delayed mean square adaptive filter (DLMS) for the application of EEG. The noised EEG signals are filtered to obtain a clean EEG with the help of reference signal.By using delayed mean square adaptive filter (DLMS) the critical path and its architecture for fast and low-complexity implementation is also analyzed.The proposed structure of transpose form of DLMS adaptive filter provide much faster convergence and lower register complexity when compared to existing structure of direct form LMS adaptive filter.Based on the experimental results of proposed structure it is clear that one adaption delay method is best one for low area complexity.one of the structure of DLMS adaptive filter,one adaption delay method is used in application of EEG to obtain clean EEG signal. One adaption delay is 44% less in area and 29% less in delay when compared to zero adaption delay and it is 66% less in area and 22% less in delay when compared to two adaption delay.The proposed transpose form of DLMS adaptive filter are implemented for filtering the EEG signal by using Verilog HDL. These designs are simulated by using Modelsim 6.4c and Synthesized by Xilinx 9.1 to implement it in Spartan 3E FPGA Kit.

EXISTING SYSTEM

The least mean squares (LMS) algorithm adjust the filter coefficients to minimize the cost function.The LMS algorithms do not involve any matrix operations. Therefore, the LMS algorithms require fewer computational resources and memory. The eigen value spread of the input correlation matrix, or the correlation matrix of the input signal, might affect the convergence speed  of the resulting adaptive filter.

There are six different types of LMS algorithm they are Standard LMS, Normalized LMS, Leaky LMS, Normalized Leaky LMS, Sign LMS, Fast Block LMS. Among six fast block LMS is best one because the fast block LMS algorithm uses the fast Fourier transform (FFT) to transform the input signal x(n) to the frequency domain. This algorithm also updates the filter coefficients in the frequency domain. Updating the filter coefficients in the frequency domain can save computational resources.

Electronics engineering Projects

Fig Block diagram of fast block LMS

These are the following steps to calculate the output and error signals by using fast block LMS algorithm.

  1. Concatenates the current input signal block to the previous blocks.
  2. Performs an FFT to transform the input signal blocks from the time domain to the frequency domain.
  3. Multiplies the input signal blocks by the filter coefficients vector .
  4. Performs an inverse FFT (IFFT) on the multiplication result.
  5. Retrieves the last block from the result as the output signal vector .
  6. Calculates the error signal vector by comparing the input signal vector  with .

APPLICATIONS

A few popular applications for FIR filters are listed below:

  • Echo cancellation
  • Telecommunications
  • Data communications
  • Wireless communications
  • Video processing
  • Speech synthesis
  • Filtering
  • High-speed modems

CONCLUSION                                   

Based on a precise critical-path analysis, we have derived low-complexity architectures for the LMS adaptive filter. We have shown that the direct-form and transpose-form LMS adaptive filters have nearly the same critical-path delay. The direct-from LMS adaptive filter, however, involves less register complexity and provides much faster convergence than its transpose-form counterpart since the latter inherently performs delayed weight adaptation. We have proposed three different structures of direct-form LMS adaptive filter with i) zero adaptation delay ii) one adaptation delay and iii) two adaptation delays. Proposed Design 1 does not involve any adaptation delay. It has the minimum of MUF among all the structures, but that is adequate to support the highest data rate in current communication systems. Among all the three Design 2 is considered to be better. Finally the LMS Adaptive FIR Filter is implemented using Verilog language and dumped into FPGA Spartan Series Device.

 SCOPE WORK

We can modify the proposed system by further reducing the area and delay of the design in future by implementing it in digital receiver. We can also use this for other filtering applications.

SNAPSHOTS

ZERO ADAPTION DELAY FIR FILTER

Electronics Projects

Snapshot :Zero adaptation delay FIR filter

 

Credits:

K.BOOBHARATHI

K.JANANI

C.JERMINA

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TOUCH ME NOT – For Playing Games-ECE Project

October 2nd, 2011 by admin | No Comments | Filed in ELECTRICAL PROJECTS, ELECTRONICS PROJECTS

ABSTRACT

Everyone likes to enjoy their free time in a more effective way. It would be more interesting and joyful if we spend the time in playing games, solving puzzles etc. Touch me not is an interesting project that allows the user to upgrade his concentration and a relief providing game.

This project is mainly designed as Events to be conducted at Exhibitions, Fetes etc. This project seems to be easy but it includes different interfacings with the microcontroller. This project uses 89C51 microcontroller. Seven segment displays are provided in this project for the display of various parameters like chances, time etc.

In this project, the user will be provided with a maximum of five chances and a time limit up to 180 seconds to play the game. The operator sets the chances and time using switches. LEDs are used in this project to indicate the number of chances selected.

Three switches are used to set the chances, time and start the game. Seven segment displays are used to display the numbers i.e., chances, entered time and current time. Once the chances and time are set, the operator presses the enter switch to start the game. Once the game is started, the time starts decreasing and the user has to play the game within the given time. The game is to move the iron rod from one end of the rope to the other end without touching the rope. If the rod touches the rope, the chances will be decremented by one and the game continues until the time is completed or the chances are equal to zero.

TOUCH ME NOT-BLOCK DIAGRAM

After the game is completed, the operator can press the enter switch once again for the next participant to play the game with the same settings i.e.; time and chance values set previously or can press the reset switch to start with the new settings.

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BRAZING CLIP ASSEMBLY MACHINE USING PLC (SPECIAL PURPOSE MACHINE)

August 23rd, 2011 by admin | 1 Comment | Filed in ELECTRICAL PROJECTS, ELECTRONICS PROJECTS

Abstract

As we have known about the importance of time management especially in transportation, we are in need of using two-wheelers or four wheelers enormously. But assembling these vehicles the part of the electro-magnetic power is inevitable. Similarly the assembling of wire is also very important. For this purpose in a familiar company like LUCAS-TVS PVT Ltd. They are using “BRAZING CLIP ASSEMBLY (Special Purpose Machine) as in small designs for erecting the commutator with copper wire. The main function is to clip or hold the commutator and copper winding in commercial starter. The use of brazing clip assembly machine is to save Rs1crore per Annam and this machine produce 32products per minute.

But let it be our basic project to know, how this assembly is made. The design of this project is our project is our basic view. So we have decided to design this project with PLC

Introduction

As we have known about the importance of time management especially in transportation, we are in need of using two-wheelers or four wheelers enormously.But assembling this vehicles the part of the electro-magnetic power is inevitable. Similarly the assembling of wire is also  very important. For this purpose in a familiar company like LUCAS-TVS PVT Ltd. They are using “BRAZING CLIP ASSEMBLY(Special Purpose Machine) as in small designs for erecting the commutator with copper wire. The main functions is to clip or hold the commutator and copper winding in commercial starter. The uses of brazing clip assembly machine is to save Rs1crore per Annam and this machine produce 32products per minute.But let it be our basic project to know, how this assembly is made. The design of this project is our project is our basic view. So we have decided to design this project with PLC along with K.P ENGINEERS , the block diagram of this machine is attached here..

It is special purpose machine by using Allen Bradley plc. This is used to manufacture the clip, which is used in starter of four wheelers. The purpose of the clip is to join the copper winding and commutator in inside the starter. For this machine we designed electrical panel board by using plc, relay board, smps, mcb, transformer, pneumatic cylinder, solenoid coils, push button etc… this machine consists of four pneumatic cylinders. They are Top cylinder, Bottom cylinder, Hold cylinder, Feeder cylinder. The bottom cylinder has three proximity sensors i) Top cylinder top sensor, ii) Top cylinder middle sensor, iii) Top cylinder bottom sensor. The bottom cylinder has one proximity sensor as well as hold cylinder and feeder cylinder has each separate proximity sensor. Photo guard is attached in this machine, its for safety purpose when the photo guards detects some interrupts it will stop the machine completely. This machine can be run in two modes they are auto mode and manual mode. In manual mode the operator can control this machine through the operator panel.

Presentation ppt

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Wireless music transmission and reception by IR communication

August 15th, 2011 by admin | 2 Comments | Filed in ELECTRICAL PROJECTS, ELECTRONICS PROJECTS

Transmittor

 

Receiver

 

 

 

Abstract

 

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