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    Secure broadcast beacon communications
    21.
    发明授权
    Secure broadcast beacon communications 有权

    公开(公告)号：US09763063B2

    公开(公告)日：2017-09-12

    申请号：US14875657

    申请日：2015-10-05

    Applicant: Derek D. Kumar

    Inventor： Derek D. Kumar

    IPC: H04L29/06 ,  H04W4/06 ,  H04W4/00 ,  H04W12/06 ,  H04W12/10

    CPC classification number: H04W4/06 ,  H04L63/123 ,  H04W4/80 ,  H04W12/06 ,  H04W12/10

    Abstract: Using various embodiments, methods and systems for secure Bluetooth Low Energy communications, in an unconnected state, are described herein. In one embodiment, conventional BLE transmitting device data can be supplemented with authentication information, including a message authentication field which enables receivers to determine if the received beacon/transmitted BLE peripheral data is genuine. In another embodiment, the authentication data can also include a time varying value field in order to prevent unintentional acceptance of transmitting device data from unauthorized replicated BLE peripherals. In one embodiment, the transmitting device computes an authentication tag using at least a secret key known to the receiving device and transmits the authentication tag to the receiving device. The receiving device can compute an authentication value using the secret key and other transmitting device information and determine if the transmitting device data is genuine by comparing the computed authentication value and the received the authentication tag.

    Method and system for simultaneously broadcasting and receiving digital and analog signals
    22.
    发明授权
    Method and system for simultaneously broadcasting and receiving digital and analog signals 失效
    用于同时广播和接收数字和模拟信号的方法和系统

    公开(公告)号：US06563880B1

    公开(公告)日：2003-05-13

    申请号：US09298093

    申请日：1999-04-22

    Applicant: Bill J. Hunsinger ,  Derek D. Kumar

    Inventor： Bill J. Hunsinger ,  Derek D. Kumar

    IPC: H04H500

    CPC classification number: H04L27/2601 ,  H04B1/406 ,  H04B1/707 ,  H04H20/30 ,  H04H20/33 ,  H04H2201/17 ,  H04H2201/183 ,  H04J9/00 ,  H04J13/004 ,  H04J13/12 ,  H04J2013/0037 ,  H04L5/023

    Abstract: A system and method for transmitting digital information through a medium such as atmospheric free-space includes a transmitter which generates a signal based on a basis set of mutually orthogonal, spectrally-shaped, sequences of substantially equal length and having predetermined autocorrelation values. The sequences may resemble noise in at least some of their characteristics. The orthogonality or cross-correlation characteristics, the autocorrelation characteristics and the resemblance to noise are due to features derived from sequences of pseudo-random numbers which themselves resemble noise in at least some of their characteristics. The waveform set based on the sequences is modulated digitally. The modulated set may be summed together along with a wideband reference signal of reduced amplitude and optionally an FM analog signal to form a composite signal which is broadcast typically through free space to at least one receiver. The receiver separates the analog FM signal from the digital signal and thereafter demodulates the digital data-carrying waveforms and outputs a stream of digital data. It has been determined to be resistant to multipath degradation.

    Abstract translation: 用于通过诸如大气自由空间的介质发送数字信息的系统和方法包括：发射机，其基于基本相等长度的相互正交，频谱形状的序列的基本集合生成信号，并具有预定的自相关值。 这些序列可能至少在其某些特征中类似于噪声。 正交性或互相关特性，自相关特性和与噪声的相似性是由于其自身类似于其至少某些特征中的噪声的伪随机数序列导出的特征。 基于序列的波形集合被数字地调制。 调制集可以与减小幅度的宽带参考信号和可选的FM模拟信号一起被合并在一起，以形成通常通过自由空间广播到至少一个接收机的复合信号。 接收器将模拟FM信号与数字信号分开，然后解调数字数据携带波形并输出数字数据流。 已经确定耐多种降解。

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