Inlämning av Examensarbete / Submission of Thesis

Sohail Noor; Ihsan Ullah MEE10:83, pp. 60. ING/School of Engineering, 2010.

The work

Författare / Author: Sohail Noor, Ihsan Ullah,
Titel / Title: Construction and Performance Evaluation of QC-LDPC Codes over Finite Fields
Abstrakt Abstract:

Low Density Parity Check (LDPC) codes are one of the block coding techniques that can approach the Shannon’s limit within a fraction of a decibel for high block lengths. In many digital communication systems these codes have strong competitors of turbo codes for error control. LDPC codes performance depends on the excellent design of parity check matrix and many diverse research methods have been used by different study groups to evaluate the performance. In this research work finite fields construction method is used and diverse techniques like masking, dispersion and array dispersion for the construction of parity check matrix H. These constructed codes are then simulated to make the performance evaluation. The key interest of this research work was to inspect the performance of LDPC codes based on finite fields. A comprehensive masking technique was also an objective of this research work. Simulation was done for different rates using additive white Gaussian noise (AWGN) channel. In MATLAB a library of different functions was created to perform the task for base matrix construction, dispersion, masking, generator matrix construction etc. Results give an idea that even at BER of 10-6 these short length LDPC codes performed much better and have no error floor. BER curves are also with 2-3dB from Shannon’s limit at BER of 10-6 for different rates.

Ämnesord / Subject: Telekommunikation - Telecommunications
Signalbehandling - Signal Processing
Elektroteknik - Electrotechnology
Nyckelord / Keywords: Low Density Parity Check (LDPC) codes, Finite Fields

Publication info

Dokument id / Document id:
Program:/ Programme Electrical Engineering with emphasis on Telecommunication
Registreringsdatum / Date of registration: 01/17/2011
Uppsatstyp / Type of thesis: Masterarbete/Master's Thesis (120 credits)


Handledare / Supervisor: Prof. Hans-Jürgen Zepernick
Examinator / Examiner: Prof. Hans-Jürgen Zepernick
Organisation / Organisation: Blekinge Institute of Technology
Institution / School: ING/School of Engineering

+46 455 38 50 00

Files & Access

Bifogad uppsats fil(er) / Files attached: ldpc codes final thesis report.pdf (1914 kB, öppnas i nytt fönster)