arXiv:2610.20827v1 Announce Type: new Abstract: Pulsar provides the world's most secure PNT service by incorporating a Combinatorial Watermark into its ranging service. Under conservative signal conditions, Pulsar's Combinatorial Watermark, where 21 ranging code chips are inverted among the 1023, provides 32-bit authentication security each second. In this work, we present our software-defined radio (SDR) implementation of the Pulsar watermark processor.
Performance Characterization of Pulsar's Software-defined Watermark Verifier
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