MUMBAI, India, Sept. 26 -- Intellectual Property India has published a patent application (202441022099 A) filed by Bharat Electronics Limited, Bangalore, Karnataka, on March 22, 2024, for 'system and method for synchronizing timestamps in quantum communication.'
Inventor(s) include Tarun Goel; Haribabu Nimmala; Y V Subba Rao; and Nidhi Jain.
The application for the patent was published on Sept. 26, under issue no. 39/2025.
According to the abstract released by the Intellectual Property India: "A system (100a) and a method (200) for synchronizing timestamps in quantum communication is provided. The method (200) includes generating a plurality of timestamps based on photons received and detected by a detector and demodulation module (113). A preamble window is generated using a phase alignment module, which contains a predefined pattern sequence. A histogram is constructed from this window, and a first offset is computed by matching it with a predetermined histogram pattern. The computed offset is adjusted to determine and correct the transmission delay. Further, to ensure continuous synchronization, a frame window is generated with a random pattern sequence, followed by histogram construction and second offset computation. The second offset is used to dynamically adjust the transmission delay. By employing Synchronous Digital Hierarchy (SDH) technology, this method enhances timestamp alignment, reduces synchronization errors, and ensures secure quantum communication over long distance."
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