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公开(公告)号：US10227059B2
公开(公告)日：2019-03-12
申请号：US15723497
申请日：2017-10-03
Inventor： Arnaud Casagrande , Carlos Velasquez , Philippe Duc
Abstract: In the case of the process for secure access to a determined space, it is provided that after activation of the wearable object, a first coded signal is transmitted from the access or unlocking device, this first coded signal is received in the object and a coded response signal is transmitted with synchronization to the device after a defined time of transmission. A processing of the coded response signal converted in the processing unit of the device is conducted in order to check the defined time delay and the response code of the wearable object and to determine the flight times of the signals between the device and the wearable object. The distance separating the wearable object and the access or unlocking device is thus calculated to authorize access to the determined space if the calculated distance is below a determined threshold after recognition of the wearable object.
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公开(公告)号：US09419660B2
公开(公告)日：2016-08-16
申请号：US14530296
申请日：2014-10-31
Inventor： Arnaud Casagrande , Carlos Velasquez , Emil Zellweger
CPC classification number: H04B1/1027 , H04B15/06 , H04B17/21 , H04B17/29 , H04B2001/1054
Abstract: The signal receiver has means to suppress at least one higher harmonic component from a MEMS or crystal oscillator having a reference resonator in filtered intermediate signals of a signal receiver. The signal receiver comprises an antenna for receiving electromagnetic signals, a low noise amplifier for amplifying signals received by the antenna, one MEMS or crystal oscillator comprising a reference resonator to generate an oscillating signal with a predefined duty-cycle, a mixer for mixing the amplified and received signals with the oscillating signal to generate intermediate signals, a band-pass filter to filter the intermediate signals, and a duty-cycle controller coupled to the MEMS or crystal oscillator and coupled to the output of the band-pass filter to analyze the spectrum of the filtered intermediate signals and to modify the duty-cycle of the oscillating signal in response to the spectrum analysis of the filtered intermediate signals.
Abstract translation: 信号接收机具有在信号接收机的经滤波的中间信号中抑制来自具有参考谐振器的MEMS或晶体振荡器的至少一个高次谐波分量的装置。 信号接收机包括用于接收电磁信号的天线，用于放大由天线接收的信号的低噪声放大器，包括参考谐振器的一个MEMS或晶体振荡器，以产生具有预定占空比的振荡信号;混频器，用于混合放大 并且用振荡信号接收信号以产生中间信号，滤波中间信号的带通滤波器和耦合到MEMS或晶体振荡器并耦合到带通滤波器的输出的占空比控制器，以分析 频谱，并响应于滤波的中间信号的频谱分析来修改振荡信号的占空比。
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3.发明授权公开(公告)号：US10690765B2
公开(公告)日：2020-06-23
申请号：US15710238
申请日：2017-09-20
Inventor： Arnaud Casagrande , Carlos Velasquez , Philippe Duc
Abstract: For the process for determining a distance, there is provided a succession of coded signals at high frequency transmitted between a base station and a wearable object. A preparation of a response signal is conducted in the wearable object on reception of the first synchronisation signal after activation of the wearable object. A transmission of successive coded signals at high frequency from the wearable object is conducted for the station, of which the last response signal is scrambled by a modulation of data on the last signal received at a high transfer rate from the station. An analysis is conducted in a processing unit of the base station after reception of the signals from the wearable object to accurately determine the distance separating the base station from the recognised wearable object.
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