Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/107390
Title: NONUNIFORMLY SAMPLED DIGITAL SIGNAL PROCESSING FOR LOW-POWER BIOMEDICAL APPLICATIONS.
Authors: HONG YIBIN
Keywords: CT digital signal processing, biomedical signal processing, memristor circuits, timing storage, frequency response masking, nonuniform sampling
Issue Date: 14-May-2014
Source: HONG YIBIN (2014-05-14). NONUNIFORMLY SAMPLED DIGITAL SIGNAL PROCESSING FOR LOW-POWER BIOMEDICAL APPLICATIONS.. ScholarBank@NUS Repository.
Abstract: BIOMEDICAL SIGNALS USUALLY EXHIBIT BURST-TYPE WAVEFORMS WITH A COMBINATION OF FAST CHANGES AND LONG PERIODS OF SILENCE. PROCESSING SUCH SPORADICALLY VARYING SIGNALS USING CONVENTIONAL UNIFORM DIGITAL SIGNAL PROCESSING (DSP) GIVES RISE TO A LARGE NUMBER OF SAMPLES THAT CARRY REDUNDANT INFORMATION, CAUSING UNNECESSARY ENERGY WASTE. IN THIS WORK, A NEW NONUNIFORM PROCESSING SCHEME COMBINING LEVEL-CROSSING SAMPLING AND CONVENTIONAL UNIFORM DSP WITH THE AID OF LINEAR INTERPOLATION WAS FIRST DEVELOPED TO SAVE POWER ON SLOWLY-VARYING PORTIONS OF THE INPUTS. NEXT, A NOVEL MEMRISTOR-BASED TIMING STORAGE CIRCUIT WAS PROPOSED FOR CONTINUOUS-TIME (CT) DSP SYSTEMS, WHICH NOT ONLY ENABLES THE RECORDING AND REPRODUCING OF CT DIGITAL SIGNALS, BUT ALSO HELPS TO IMPLEMENT LONG DELAY REQUIRED BY LOW-FREQUENCY BIOMEDICAL APPLICATIONS WITH REDUCED POWER AND AREA. LASTLY, THE TUNABILITY OF THE PROPOSED DELAY IMPLEMENTATION ALSO ALLOWS THE USE OF FREQUENCY RESPONSE MASKING TECHNIQUES IN DESIGNING SHARP-TRANS
URI: http://scholarbank.nus.edu.sg/handle/10635/107390
Appears in Collections:Ph.D Theses (Open)

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