PROJECT TITLE :
Receiver Design of Radio-Controlled Clocks Based on the New WWVB Broadcast Format
The design and algorithms for the first all-digital radio-controlled clock receiver for the new WWVB broadcast format are proposed. To deal with the possibly low signal-to-noise ratio conditions and also the relatively massive frequency offsets experienced within the receiver, two various timing synchronization approaches are investigated, i.e., one based on a most-likelihood (ML) criterion and the other primarily based on correlation. We have a tendency to show that the correlation-based mostly synchronization technique reduces the implementation complexity by over 50p.c, while its performance is only but 1 dB inferior to that of the ML-primarily based technique. Call and detection algorithms are proposed for 2 operating regimes in the receiver: tracking and acquisition. In tracking, the proposed decision ways scale back the timing mean squared error by as a lot of as 63p.c compared with what the synchronizer produces without any further processing. In acquisition, the proposed joint synchronization and decoding technique significantly improves the robustness by exploiting the channel code in the information. Compared with receivers based on the legacy broadcast, over fifteen dB performance gains are achieved by the modulation and algorithms proposed for the tracking and acquisition operations. In addition to reception performance analyses, energy consumption tradeoffs are presented.
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