Optimized Preamble and Method for Interference Robust Packet Detection for Telemetry Applications

Simple SummaryContent extracted from patent full text and abstract with AI.

This invention introduces a method and receiver design for more reliable and robust packet detection in wireless telemetry applications, even in the presence of interference or frequency offsets. By splitting the preamble (pilot sequence) of data packets into multiple parts and separately correlating them with partial reference sequences, then non-coherently combining these results, the system can more accurately detect incoming packets and synchronize communication, despite channel degradation or device imperfections. Additional techniques like normalization, weighting, side lobe detection, and use of correlation windows further enhance the receiver’s ability to identify and process packets in noisy or hostile wireless environments.

Use CasesContent extracted from patent full text and abstract with AI.

• Smart meter networks (e.g., water, gas, electricity meters) sending wireless readings to a central base station.
• Large-scale sensor networks for industrial telemetry, environmental monitoring, or agriculture.
• Battery-powered IoT devices in crowded or interference-prone radio bands (such as the ISM band).
• Mission-critical remote monitoring systems, where reliable low-power wireless communication is required.
• Wireless data collection from uncoordinated or unsynchronized networks of simple, low-cost sensor nodes.

BenefitsContent extracted from patent full text and abstract with AI.

• Significantly improved robustness to interference and frequency offsets, enabling reliable packet detection even when radio conditions are poor or unpredictable.
• Lower false detection rates and higher detection sensitivity, reducing missed or incorrectly identified packets even at low signal-to-noise ratios.
• Reduced computational and power requirements at the receiver, as the method allows early filtering and staged processing only when necessary.
• Supports use of low-cost, less precise components (like cheap crystals in sensor nodes), making mass deployment of simple battery-powered transmitters practical and cost-effective.
• Adaptable and scalable to large networks—capable of dealing with hundreds or thousands of communicating devices.
• Techniques like normalization and side-lobe detection further reduce errors and improve detection accuracy, enhancing overall communication system reliability.

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Patent Abstract

Embodiments provide a receiver comprising a receiving unit and a synchronization unit. The receiving unit is configured to receive a data packet comprising a pilot sequence. The synchronization unit is configured to separately correlate the pilot sequence with at least two partial reference sequences corresponding to a reference sequence for the pilot sequence of the data packet, in order to obtain a partial correlation result for each of the at least two partial reference sequences, wherein the synchronization unit is configured to non-coherently add the partial correlation results in order to obtain a coarse correlation result for the data packet.