Preprint Open Access
Synchronization of multiple USRP SDRs for coherent receiver applications
Krueckemeier, Markus; Schwartau, Fabian; Monka-Ewe, Carsten; Schoebel, Joerg
This paper describes the necessary means to combine multiple Ettus Research USRP X310 software-defined radios to a multichannel coherent receiver for direction-of-arrival (DoA) and passive radar applications. The requirements to combine several software-defined radios to a multichannel coherent receiver are examined in general. In particular the requirement of phase coherence necessitates a closer look on the receiver synchronization, since the straightforward approach of synchronizing the systems with a common reference clock will in most cases lead to phase ambiguities between the channels. The mechanism inducing these phase ambiguities between several systems that are phase-locked to a common reference is discussed in detail. Results regarding the achieved phase stability and a preliminary measurement demonstrating the DoA capabilities of the system are shown.
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- Publication date:
- October 29, 2019
- DOI:
-
- Grants:
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European Commission:
- ALFA - Advanced Low Flying Aircrafts Detection and Tracking (700002)
- Meeting:
- 2019 Sixth International Conference on Software Defined Systems (SDS), Rome, Italy, 10-13 June 2019
- Communities:
- License (for files):
- Creative Commons Attribution 4.0 International