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1.发明授权公开(公告)号：US11550049B2
公开(公告)日：2023-01-10
申请号：US17105242
申请日：2020-11-25
Applicant: Tata Consultancy Services Limited
Inventor： Anwesha Khasnobish , Arindam Ray , Smriti Rani , Amit Swain , Chirabrata Bhaumik , Tapas Chakravarty
Abstract: Radar based HR and BR measurements by simultaneous decoding is a technical problem due to presence of intermodulation of BR and HR harmonics, which degrades simultaneous decoding. Embodiments herein provide a method and system for unobtrusive liveliness detection and monitoring of a subject using a Dual Frequency Radar (DFR) in an IOT network. The system has the capability to completely process the captured raw signals onboard to by applying required signal conditioning and extraction of relevant information using unique signal processing techniques for determining the HR and the BR of the subject accurately. The intermodulation of BR and HR harmonics is eliminated by the system by performing frequency spectrum averaging of both radars signals, which improves the accuracy. Further, the system is configured with a light MQTT protocol and encoding modules for any data to be shared for off board processing, ensuring data security and privacy compliance.
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2.发明授权公开(公告)号：US12298420B2
公开(公告)日：2025-05-13
申请号：US17956006
申请日：2022-09-29
Applicant: Tata Consultancy Services Limited
Inventor： Avik Ghose , Chirabrata Bhaumik , Tapas Chakravarty , Amit Swain
Abstract: Ultra Wide Band (UWB) based Real Time Location Systems (RTLS) that are being used for location tracking suffer from environment specific errors that are introduced due to factors such as difference in reflection and propagation. In order to address this challenge, present invention discloses performing error modelling for object localization using Ultra Wide Band (UWB) sensors. The error modelling allows to correct a determined location of an object being tracked, to determine a corrected location. Based on an obtained distance value of a tag node with reference to position of a plurality of anchor nodes, location of an object in a 2-Dimensional space is determined. The determined location is corrected to obtain the corrected location, and in this process the error modelling and related error correction is done.
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公开(公告)号：US11375021B2
公开(公告)日：2022-06-28
申请号：US17136436
申请日：2020-12-29
Applicant: Tata Consultancy Services Limited
Inventor： Chirabrata Bhaumik , Rajat Das , Arpan Pal , Tapas Chakravarty , Raj Rakshit , Avik Ghose , Amit Swain , Arijit Sinharay
IPC: H04L12/00 , H04L67/125 , G06F16/25 , G16Y30/00 , G16Y40/10
Abstract: Any sensing system is faced with triangle of dilemma between accuracy, latency and energy. High energy and high latency sensing systems are often very accurate but less useful. Embodiments herein provide a method and system for edge based sensor controlling in the IoT network for event monitoring. The system disclosed herein applies a hierarchical sensor selection process and adaptively chooses sensors among multiple sensors deployed in the IoT network. Further, on-the-fly changes operation modes of the sensors to automatically produce the best possible inference from the selected sensor data, in time, power and latency at the edge. Further, sensors of the system include a waveform and diversity control mechanism that enables controlling of an excitation signal of the sensor.
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