Real-time implementation of a Doppler signal spectral estimator using sequential and parallel processing techniques

Madeira, M. M.; Tokhi, M. O.; Ruano, M. Graça

http://hdl.handle.net/10400.1/5869

Use this identifier to reference this record.

Name:	Description:	Size:	Format:
Real-time implementation of a Doppler signal spectral estimator using sequential and parallel processing techniques.pdf		1.39 MB	Adobe PDF	Download

Send Feedback

Authors

Madeira, M. M.

Tokhi, M. O.

Ruano, M. Graça

Abstract(s)

Doppler signal spectral estimation has been used to evaluate blood flow parameters in order to diagnose cardiovascular diseases. The modified covariance (MC) method has proved to provide accurate estimation of the two spectral parameters employed in clinical diagnosis, namely mean frequency and bandwidth. The aim of the work reported in this paper is to determine an efficient real-time implementation of the MC spectral estimator by investigating several architectures and implementation methods. A comparative performance analysis of the implementation of the MC algorithm on several homogeneous and heterogeneous architectures incorporating transputers, digital signal processing (DSP) devices and a vector processor is reported. The performances of these architectures are evaluated and compared in terms of computational time (execution and communication) and gradient measurements. Analysis of the results reveals that both the homogeneous and heterogeneous DSP-based parallel architectures meet the real-time requirements. (C) 2000 Elsevier Science B.V. All rights reserved.

Keywords

Digital signal processing Doppler signal spectral estimator Heterogeneous architectures High performance computing Homogeneous architectures Real-time signal processing Sequential processing Parallel processing Spectral estimation