Institutional Repository
Technical University of Crete
Technical University of Crete
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| URI: | http://purl.tuc.gr/dl/dias/5320DF3F-CC49-4774-9B5E-D0A7F4FEDDAF | ||
| Year | 2025 | ||
| Type of Item | Diploma Work | ||
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| Bibliographic Citation | Dimitrios Angelou, "Multi-static localization with commodity Software Defined Radios (SDR)", Diploma Work, School of Electrical and Computer Engineering, Technical University of Crete, Chania, Greece, 2025 https://doi.org/10.26233/heallink.tuc.101935 | ||
| Appears in Collections |
Passive radio frequency identification (RFID) tag localization has been mostly examined for monostatic and synchronized setups. This work takes it a few steps further and performs real-time, distributed, multistatic localization of such tags. It succeeds by exploiting the recently-proposed elliptical direction-of-arrival-based (EllDoA) localization algorithm, designed for multi-antenna setups, with however, synchronized radios at the carrier level. This work also employs a carrier frequency offset (CFO) mitigation method and demonstrates its real-time feasibility even with cheap and distributed, unsynchronized software defined radios (SDR). The inherent carrier phase offset (CPO) problem of such setups is also addressed, and it is experimentally shown that the calibration step needs to be done only once, and not for further reruns of the experiment, rendering it ideal for practical applications. As a collateral dividend, a complete GNURadio-based software solution was developed for distributed, unsynchronized and real-time localization. It was also shown that an unsynchronized setup with ultra-low cost SDRs is possible to perform localization with a 15-20\% impact on accuracy, compared to the centrally-synchronized case.
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