{"ID":2883567,"CreatedAt":"2026-06-01T04:54:23.091178241Z","UpdatedAt":"2026-06-01T04:54:23.091178241Z","DeletedAt":null,"paper_url":"https://arxiv.org/abs/2508.11686","arxiv_id":"2508.11686","title":"The Lost-K and Shorter-J Phenomenon in Non-Standard Ballistocardiography Data","abstract":"Non-standard ballistocardiogram(BCG) data generally do not have prominent J peaks. This paper introduces two phenomena that reduce the prominence of Jpeaks: the shorter-J phenomenon and the lost-K phenomenon, both of which are commonly observed in non-standard BCG signals . This paper also proposes three signal transformation methods that effectively improve the lost-K and shorter-J phenomena. The methods were evaluated on a time-aligned ECG-BCG dataset with 40 subjects. The results show that based on the transformed signal, simple J-peak-based methods using only the detection of local maxima or minima show better performance in locating J-peaks and extracting BCG cycles, especially for non-standard BCG data.","short_abstract":"Non-standard ballistocardiogram(BCG) data generally do not have prominent J peaks. This paper introduces two phenomena that reduce the prominence of Jpeaks: the shorter-J phenomenon and the lost-K phenomenon, both of which are commonly observed in non-standard BCG signals . This paper also proposes three signal transfo...","url_abs":"https://arxiv.org/abs/2508.11686","url_pdf":"https://arxiv.org/pdf/2508.11686v1","authors":"[\"Shuai Jiao\",\"Jian Fang\",\"Tianshu Zhou\",\"Jinsong Li\",\"Yanhong Liu\",\"Ye Liu\",\"Ming Ju\"]","published":"2025-08-11T06:21:28Z","proceeding":"eess.SP","tasks":"[\"eess.SP\"]","methods":"[]","has_code":false}