{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,7,30]],"date-time":"2025-07-30T14:05:03Z","timestamp":1753884303523,"version":"3.41.2"},"reference-count":37,"publisher":"World Scientific Pub Co Pte Ltd","issue":"09","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J CIRCUIT SYST COMP"],"published-print":{"date-parts":[[2023,6]]},"abstract":"<jats:p> GPS receivers have a wide range of applications, but are not always secure. A spoofing attack is one source of conscious errors in which the counterfeit signal overcomes the authentic GPS signal and takes control of the receiver\u2019s operation. Recently, GPS spoofing attack detection based on computational algorithms, such as machine learning, classification, wavelet transform and clustering, has been developing. This paper proposes multiple clustering algorithms for accurately clustering the authentic and spoofing signals, called subtractive, FCM and DBSCAN clustering. The spoofing attack is recognized using two distinct features: moving phase detector variance and norms of correlators. Spoofing and authentic signals have different patterns in the proposed features. According to the Dunn and Silhouette indexes, the validation of the results is investigated. The Dunn values for the proposed approaches are 0.8592, 0.5285 and 0.6039 for DBSCAN, FCM and subtractive clustering, respectively. Also, the DBSCAN algorithm is implemented at the RTL level because of its highest value for the Dunn index and algorithm verifiability. Using the Vivado tools, this algorithm is implemented and designed on a Xilinx Virtex 7 xc7vx690tffg1930-3 hardware device for two-dimensional data with 32-bit accuracy and 130 data points. <\/jats:p>","DOI":"10.1142\/s0218126623501529","type":"journal-article","created":{"date-parts":[[2022,11,14]],"date-time":"2022-11-14T07:46:56Z","timestamp":1668412016000},"source":"Crossref","is-referenced-by-count":2,"title":["GPS Receivers Spoofing Detection Based on Subtractive, FCM and DBSCAN Clustering Algorithms"],"prefix":"10.1142","volume":"32","author":[{"given":"Z.","family":"Sarpanah","sequence":"first","affiliation":[{"name":"Department of Electrical Engineering, Iran University of Science and Technology, Narmak, Tehran 16846-13114, Iran"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2389-644X","authenticated-orcid":false,"given":"M. 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