DVB-T Receiver Independent of Channel Allocation, With Frequency Offset Compensation for Improving Resolution in Low Cost Passive Radar
| Autor: | Nerea del-Rey-Maestre, David Mata-Moya, Maria-Pilar Jarabo-Amores, Manuel Rosa-Zurera, Pedro-Jose Gomez-del-Hoyo |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Channel allocation schemes
Orthogonal frequency-division multiplexing business.industry Computer science 010401 analytical chemistry Bandwidth (signal processing) 01 natural sciences 0104 chemical sciences Cyclic prefix Passive radar symbols.namesake Dispersion (optics) Electronic engineering symbols Frequency offset Clutter Electrical and Electronic Engineering business Instrumentation Doppler effect Digital signal processing Communication channel |
| Zdroj: | IEEE Sensors Journal. 20:14958-14974 |
| ISSN: | 2379-9153 1530-437X |
| DOI: | 10.1109/jsen.2020.3011129 |
| Popis: | In this article, a commercial low cost solution for increasing DVB-T based passive radar (also referred to as passive coherent location) robustness with respect to channel allocation and range resolution, is designed. IDEPAR demonstrator is updated to include a new recording system in charge of DVB-T channels reallocation. The use of commercial hardware introduces frequency mismatching between acquired channels that compromises system operation. To face channel frequency alignment, fulfilling the requirements imposed by the high Doppler resolution typical of passive radars, a novel compensation algorithm is proposed, based on the minimization of signal dispersion in the Cross-Ambiguity Function domain. The well-known cyclic prefix van de Beek method is used as reference. Results show an increase in target signal to interference ratio and detection performances, as well as a reduction of clutter dispersion when the novel proposed algorithm is applied. The low cost solution is also compared to a high performance one capable of acquiring a wide bandwidth of sparse DVB-T channels, and performing channel reallocation by digital signal processing. Results show that both systems reached similar performances in terms of range resolution and SNR improvement. |
| Databáze: | OpenAIRE |
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