کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6951086 1451649 2017 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Variable delay digital comb filter extraction of weak phase signals for SSVEP
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر پردازش سیگنال
پیش نمایش صفحه اول مقاله
Variable delay digital comb filter extraction of weak phase signals for SSVEP
چکیده انگلیسی
This study presents denoising of phases signal by comb filter. Signal phase is widely used in biomedical and communications engineering, and has become increasingly important over the past few years. In particular, steady-state visual evoked potential (SSVEP) of electroencephalogram (EEG) and quadrature amplitude modulation (QAM) uses phase to distinguish channel and data. For signal processing, the filter is usually adopted. In this study, the usefulness of comb and bandpass filters in detecting the phase of a signal is compared by using simulated and real signals to verify phase signal denoising. Experimental data show that comb filters had a higher signal to noise ratio (SNR) of phase signal. However, even if a comb filter performs well, the delay time of a digital comb filter will be limited by the sampling rate. It is possible to solve this problem, but doing so is inconvenient within the context of real-time applications. Using a variable delay (VD) approached to fractional delay for digital comb filter, it is both simple and easy to use.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biomedical Signal Processing and Control - Volume 31, January 2017, Pages 211-216
نویسندگان
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