Comparison of Re-sampling Methods in the Spectral Analysis of RR-interval Ser...CSCJournals
The heart rate variability (HRV), refers to the beat-to-beat alterations in heart rate, is analyzed using RR-interval (RRI) series derived from the ECG signal as an interval between successive QRS complexes. For deciphering the true HRV spectrum using FFT, the RRI series should be resampled. But re-sampling often induces a noticeable distortion in the HRV power spectral estimates. Thus, the re-sampling operation should be accurate enough in reproducing the finest variation in the given signal. This paper compared three most widely used interpolation techniques: linear, cubicspline, and Berger’s, as re-sampling methods, in an attempt to propose an optimal method of interpolation for HRV analysis. The linear and cubicspline methods based PSD estimates, for artificially generated non-uniformly sampled RRI series, introduce linear phase shifting, and thus lower the HRV frequencies. On the contrary, Berger’s method efficiently reproduced the inherent frequencies in the underlying signal except some amplitude distortion. Further, similar trends in PSD estimates were obtained for real RRI series as well. Thus, it was concluded that at the expense of some increase in computational complexity, the spectral distortion has been significantly reduced using the Berger’s interpolation based re-sampling method as compared to the linear and cubicspline methods.
Comparison of Re-sampling Methods in the Spectral Analysis of RR-interval Ser...CSCJournals
The heart rate variability (HRV), refers to the beat-to-beat alterations in heart rate, is analyzed using RR-interval (RRI) series derived from the ECG signal as an interval between successive QRS complexes. For deciphering the true HRV spectrum using FFT, the RRI series should be resampled. But re-sampling often induces a noticeable distortion in the HRV power spectral estimates. Thus, the re-sampling operation should be accurate enough in reproducing the finest variation in the given signal. This paper compared three most widely used interpolation techniques: linear, cubicspline, and Berger’s, as re-sampling methods, in an attempt to propose an optimal method of interpolation for HRV analysis. The linear and cubicspline methods based PSD estimates, for artificially generated non-uniformly sampled RRI series, introduce linear phase shifting, and thus lower the HRV frequencies. On the contrary, Berger’s method efficiently reproduced the inherent frequencies in the underlying signal except some amplitude distortion. Further, similar trends in PSD estimates were obtained for real RRI series as well. Thus, it was concluded that at the expense of some increase in computational complexity, the spectral distortion has been significantly reduced using the Berger’s interpolation based re-sampling method as compared to the linear and cubicspline methods.
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Hario Business Partner, sebuah program bisnis yang memungkinkan setiap orang menghasilkan uang bonus dari produk asuransi Hario Siaga dari MNC Life.
Untuk bergabung dengan bisnis Hario Business Partner, modal yang dibutuhkan hanya Rp.255rb, sekali saja. Tidak ada biaya bulanan. Potensi penghasilan dari puluhan sampai ratusan juta, bahkan lebih - dan bisa dicapai idealnya dalam 5 bulan.
Untuk bergabung dengan Hario Business Partner. Silahkan membuka website http://www.suksesonline.com/infosukses - Silahkan klik menu Pendaftaran atau tombol Mendaftar.
Apabila bergabung, anda akan mendapatkan web replika untuk keperluan promosi secara online.
Bueno mi presentacion se enfoca en el riesgo de seguridad vial de la empresa donde trabajo actualmente, me parecio de gran ayuda este trabajo para identificar y resaltar la problematica presente en mi lugar trabajo, y en brindar una ayuda para evitar algun accidente.