Efficient Computation of the LF/HF Ratio in Heart Rate Variability Analysis Based on Bitstream Filtering

Author

Ho, Mel M.S. ; Lande, Tor S. ; Toumazou, Christopher

Author_Institution

Imperial Coll. London, London

fYear

2007

fDate

27-30 Nov. 2007

Firstpage

17

Lastpage

20

Abstract

This paper describes a novel approach to hardware efficient computing of the LF/HF ratio as required in heart rate variability (HRV) analysis. Heart rate data are converted into a bit stream vie delta-sigma modulation. The bit stream is filtered in the LF and HF sub-bands using novel hardware architecture. Sub-band spectral content is estimated from the filtered signals. The proposed algorithm and hardware architecture is extremely efficient, making continuous real-time HRV analysis possible in low-power microelectronics.

Keywords

biomedical electronics; biomedical measurement; cardiovascular system; convolution; delta-sigma modulation; medical signal processing; patient monitoring; signal sampling; LF-HF ratio; bitstream filtering; delta-sigma modulation; hardware architecture; heart rate variability analysis; low-power microelectronics; real-time HRV analysis; real-time cardiac monitoring; signal filtering; sub-band spectral content; Convolution; Filtering; Finite impulse response filter; Frequency; Hafnium; Hardware; Heart rate; Heart rate variability; Noise shaping; Quantization; Bitstream convolution; bitstream filtering; heart rate variability; real-time cardiac monitoring;

fLanguage

English

Publisher

ieee

Conference_Titel

Biomedical Circuits and Systems Conference, 2007. BIOCAS 2007. IEEE

Conference_Location

Montreal, Que.

Print_ISBN

978-1-4244-1524-3

Electronic_ISBN

978-1-4244-1525-0

Type

conf

DOI

10.1109/BIOCAS.2007.4463298

Filename

4463298