Date of Publication

2007

Document Type

Master's Thesis

Degree Name

Master of Science in Electronics and Communications Engineering

Subject Categories

Systems and Communications

College

Gokongwei College of Engineering

Department/Unit

Electronics And Communications Engg

Thesis Adviser

Enrique M. Manzano

Defense Panel Chair

Ann E.Dulay

Defense Panel Member

Felicito S. Caluyo
Roberto T. Caguingin

Abstract/Summary

The study presents the analytical and experimental results for designing an adaptive system that cancels the periodic impulse noise exhibited by an intrabuilding powerline channel. The study uses a least-mean square (LMS) based algorithm for the design of finite-impulse response (FIR) adaptive filter that converges to the characteristics of the intrabuilding powerline channel. The characteristics of the intrabuilding powerline impulse noise are investigated both in time and frequency domain under binary-phase shift keying (BPSK) demodulation process. Results of the study show that the harmonic noise of demodulated powerline noise using two different carrier frequencies generated similar sinusoidal components thus; real-time adaptive impulse noise cancellation can be realized. The adaptive filter response provides a significant average intrabuilding powerline noise reduction of up to 12.8dB. Experiments show that the proposed system provides a significant improvement of biterror counts of up to 11000 bits compared to a similar powerline communication system without using adaptive impulse noise cancellation especially when the system uses higher transmission rates and the powerline channel exhibits high attenuation.

Abstract Format

html

Language

English

Format

Electronic

Accession Number

CDTG004299

Shelf Location

Archives, The Learning Commons, 12F Henry Sy Sr. Hall

Physical Description

90 leaves ; 28 cm.

Keywords

Least squares; Least squares—Computer programs; Electric lines--Carrier transmission; Communication systems

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