Date of Publication
2004
Document Type
Master's Thesis
Degree Name
Master of Science in Electronics and Communications Engineering
College
Gokongwei College of Engineering
Department/Unit
Electronics and Communications Engineering
Thesis Adviser
Edwin C. Sybingco
Defense Panel Chair
Enrique M. Manzano
Defense Panel Member
Analene M. Nagayo
Marvil V. Graza
Abstract/Summary
This study evaluates the performance of an echo canceller structure that employs two switched adaptive filter algorithms: the Fast Affine Projection (FAP) and the Normalized Least Mean Square (NLMS). The evaluation validates the observation that convergence rate of the FAP and the NLMS are comparable at error coefficients below -15dB. This observation suggests a new algorithm that initially employs an FAP and later switches to NLMS. This new structure presents comparable convergence rate as the FAP but with lower computational overhead. The new algorithm is implemented on Texas Instrument's TMS320C542 DSP starter kit (DSK) and evaluated against the NLMS and FAP algorithms in terms of echo return loss, convergence rate, and computational cost using simulated sources and echo paths. Using this new structure, acoustic and line echo cancellation, which is necessary in most telecommunications applications, can be implemented with improved convergence and lower computational overhead freeing processor resources for other tasks.
Abstract Format
html
Language
English
Format
Electronic
Accession Number
CDTG003681
Shelf Location
Archives, The Learning Commons, 12F Henry Sy Sr. Hall
Keywords
Switching theory; Algorithms; Adaptive signal processing; Adaptive filters
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Recommended Citation
Ruiz, R. L. (2004). Implementation of a switched fast affine projection-normalized least mean square algorithm in the TMSC542 DSK for acoustic and line echo cancellation. Retrieved from https://animorepository.dlsu.edu.ph/etd_masteral/3166
Note
Title on screen.