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Currently, most waveform data processing methods are mainly aimed at single or several wavelengths. Hidden components are revealed mainly through optimization algorithms and comparisons of neighbor distance in different wavelengths. The same target may be misjudged as different ones when dealing with 101 channels. However, using the gain decomposition method with dozens of wavelengths will change the spectral intensity and affect the classification. In this paper, for hundred-channel FWHSL data, we propose a method that can detect and re-decompose the channels with outliers by checking neighbor distances and selecting specific wavelengths to compose a characteristic spectrum by performing PCA and clustering on the decomposition results for object identification. The experimental results show that compared with the conventional single channel waveform decomposition method, the average accuracy is increased by 20.1%, the average relative error of adjacent target distance is reduced from 0.1253 to 0.0037, and the degree of distance dispersion is reduced by 95.36%. The extracted spectrum can effectively characterize and distinguish the target and contains commonly used wavelengths that make up the vegetation index (e.g., 670 nm, 784 nm, etc.).<\/jats:p>","DOI":"10.3390\/rs14215285","type":"journal-article","created":{"date-parts":[[2022,10,24]],"date-time":"2022-10-24T10:09:23Z","timestamp":1666606163000},"page":"5285","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":16,"title":["A Novel Waveform Decomposition and Spectral Extraction Method for 101-Channel Hyperspectral LiDAR"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8730-9315","authenticated-orcid":false,"given":"Yuhao","family":"Xia","sequence":"first","affiliation":[{"name":"State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology, Hefei 230037, China"},{"name":"Anhui Province Key Laboratory of Electronic Restriction, National University of Defense Technology, Hefei 230037, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9717-5525","authenticated-orcid":false,"given":"Shilong","family":"Xu","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology, Hefei 230037, China"},{"name":"Anhui Province Key Laboratory of Electronic Restriction, National University of Defense Technology, Hefei 230037, China"}]},{"given":"Jiajie","family":"Fang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology, Hefei 230037, China"},{"name":"Anhui Province Key Laboratory of Electronic Restriction, National University of Defense Technology, Hefei 230037, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1339-8065","authenticated-orcid":false,"given":"Ahui","family":"Hou","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology, Hefei 230037, China"},{"name":"Anhui Province Key Laboratory of Electronic Restriction, National University of Defense Technology, Hefei 230037, China"}]},{"given":"Youlong","family":"Chen","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology, Hefei 230037, China"},{"name":"Anhui Province Key Laboratory of Electronic Restriction, National University of Defense Technology, Hefei 230037, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5900-2719","authenticated-orcid":false,"given":"Xinyuan","family":"Zhang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology, Hefei 230037, China"},{"name":"Anhui Province Key Laboratory of Electronic Restriction, National University of Defense Technology, Hefei 230037, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1777-0242","authenticated-orcid":false,"given":"Yihua","family":"Hu","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology, Hefei 230037, China"},{"name":"Anhui Province Key Laboratory of Electronic Restriction, National University of Defense Technology, Hefei 230037, China"}]}],"member":"1968","published-online":{"date-parts":[[2022,10,22]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Tan, K., and Cheng, X. 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