Refining instantaneous frequency estimation: Tackling abrupt transitions in aliased non-stationary signals
Many real-life non-stationary signals, such as jammers or communication signals, exhibit abrupt transitions in instantaneous frequency. Estimating instantaneous frequencies of such signals is vital in applications involving interference mitigation in Global Navigation Satellite System and jammer loc...
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| Language: | English |
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Elsevier
2025-03-01
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| Series: | Franklin Open |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2773186325000076 |
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| author | Sadiq Ali Nabeel Ali Khan |
| author_facet | Sadiq Ali Nabeel Ali Khan |
| author_sort | Sadiq Ali |
| collection | DOAJ |
| description | Many real-life non-stationary signals, such as jammers or communication signals, exhibit abrupt transitions in instantaneous frequency. Estimating instantaneous frequencies of such signals is vital in applications involving interference mitigation in Global Navigation Satellite System and jammer localization. In this paper, a method is developed to estimate the Instantaneous Frequency curve in such challenging scenarios, where multi-component signals have abrupt transitions and intersect each other in the time–frequency domain. The proposed Instantaneous Frequency estimation algorithm is further extended by adding a refinement mechanism where the crude estimates of Instantaneous Frequencies are further improved through the re-estimation stage. The Instantaneous Frequency of each component is estimated individually by removing all the remaining components. Experimental results are presented, indicating that the proposed method outperforms the existing methods. |
| format | Article |
| id | doaj-art-f39fc415b77b4addb2cfb1b8fb620649 |
| institution | Kabale University |
| issn | 2773-1863 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Franklin Open |
| spelling | doaj-art-f39fc415b77b4addb2cfb1b8fb6206492025-01-26T05:05:25ZengElsevierFranklin Open2773-18632025-03-0110100217Refining instantaneous frequency estimation: Tackling abrupt transitions in aliased non-stationary signalsSadiq Ali0Nabeel Ali Khan1Department of Electrical Engineering University of Engineering and Technology, University Road, Peshawar, 25000, Khyber Pakhtunkhwa, Pakistan; Corresponding author.GMV NSL, Innovation Park, Triumph Road, Nottingham, United KingdomMany real-life non-stationary signals, such as jammers or communication signals, exhibit abrupt transitions in instantaneous frequency. Estimating instantaneous frequencies of such signals is vital in applications involving interference mitigation in Global Navigation Satellite System and jammer localization. In this paper, a method is developed to estimate the Instantaneous Frequency curve in such challenging scenarios, where multi-component signals have abrupt transitions and intersect each other in the time–frequency domain. The proposed Instantaneous Frequency estimation algorithm is further extended by adding a refinement mechanism where the crude estimates of Instantaneous Frequencies are further improved through the re-estimation stage. The Instantaneous Frequency of each component is estimated individually by removing all the remaining components. Experimental results are presented, indicating that the proposed method outperforms the existing methods.http://www.sciencedirect.com/science/article/pii/S2773186325000076Time–frequencyInstantaneous-frequencyAliasingNon-stationaryJammers |
| spellingShingle | Sadiq Ali Nabeel Ali Khan Refining instantaneous frequency estimation: Tackling abrupt transitions in aliased non-stationary signals Franklin Open Time–frequency Instantaneous-frequency Aliasing Non-stationary Jammers |
| title | Refining instantaneous frequency estimation: Tackling abrupt transitions in aliased non-stationary signals |
| title_full | Refining instantaneous frequency estimation: Tackling abrupt transitions in aliased non-stationary signals |
| title_fullStr | Refining instantaneous frequency estimation: Tackling abrupt transitions in aliased non-stationary signals |
| title_full_unstemmed | Refining instantaneous frequency estimation: Tackling abrupt transitions in aliased non-stationary signals |
| title_short | Refining instantaneous frequency estimation: Tackling abrupt transitions in aliased non-stationary signals |
| title_sort | refining instantaneous frequency estimation tackling abrupt transitions in aliased non stationary signals |
| topic | Time–frequency Instantaneous-frequency Aliasing Non-stationary Jammers |
| url | http://www.sciencedirect.com/science/article/pii/S2773186325000076 |
| work_keys_str_mv | AT sadiqali refininginstantaneousfrequencyestimationtacklingabrupttransitionsinaliasednonstationarysignals AT nabeelalikhan refininginstantaneousfrequencyestimationtacklingabrupttransitionsinaliasednonstationarysignals |