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    Method and system for simultaneously broadcasting and receiving digital and analog signals
    2.
    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

    申请人： Bill J. Hunsinger ,  Derek D. Kumar

    发明人： Bill J. Hunsinger ,  Derek D. Kumar

    IPC分类号： H04H500

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

    摘要： 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.

    摘要翻译： 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。

    SECURE BROADCAST BEACON COMMUNICATIONS
    7.
    发明申请
    SECURE BROADCAST BEACON COMMUNICATIONS 审中-公开

    公开(公告)号：US20170347245A1

    公开(公告)日：2017-11-30

    申请号：US15633622

    申请日：2017-06-26

    申请人： Derek D. Kumar

    发明人： Derek D. Kumar

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

    CPC分类号： H04W4/06 ,  H04L63/123 ,  H04W4/80 ,  H04W12/06 ,  H04W12/10

    摘要： 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.

    In-band on-channel digital broadcasting method and system
    8.
    发明授权
    In-band on-channel digital broadcasting method and system 失效
    带内通道数字广播方式和系统

    公开(公告)号：US07046694B2

    公开(公告)日：2006-05-16

    申请号：US09877123

    申请日：2001-06-11

    申请人： Derek D. Kumar

    发明人： Derek D. Kumar

    IPC分类号： H04J1/05 ,  H04J1/12

    CPC分类号： H04H20/30 ,  H04H60/07 ,  H04H2201/183 ,  H04H2201/20 ,  H04L1/0054 ,  H04L1/0071 ,  H04L1/02 ,  H04L1/08

    摘要： A method and system are provided for the transmission and reception of an In-band On-channel (IBOC) FM-band digital audio broadcast (DAB) signal. The IBOC DAB signal is generated in the transmitter to substantially occupy the upper and lower sideband frequency regions in the RF emission mask for the conventional broadcast analog FM-band. Redundant source bit information is transmitted in both the upper and lower sidebands so that the loss of information in either one but not both sidebands due to large amounts of interference or distortion, caused by, for example, first-adjacent interference, does not deleteriously affect the IBOC DAB receiver performance. The system exhibits both frequency-diversity and time-diversity. The receiver determines which codeword bit estimate, corresponding to either upper or lower sideband signals, is less likely to be erroneous. The receiver system selects between decoded estimates for each pair of demodulated ECC codewords or combines both ECC codeword estimates prior to decoding in certain embodiments.

    摘要翻译： 提供了一种用于发送和接收带内在线频道（IBOC）FM频带数字音频广播（DAB）信号的方法和系统。 在发射机中产生IBOC DAB信号，以便在传统广播模拟FM频带的RF发射掩模中基本上占据上边带和下边带频率区域。 冗余源位信息在上边带和下边带两者中传输，使得由于例如由第一相邻干扰引起的大量干扰或失真导致的两个边带中的信息丢失不会有害地影响 IBOC DAB接收机性能。 该系统表现出频率分集和时间分集两者。 接收机确定对应于上边带或下边带信号的码字比特估计不太可能是错误的。 接收机系统在每对解调的ECC码字的解码估计之间进行选择，或者在某些实施例中在解码之前组合ECC码字估计。

    Secure broadcast beacon communications
    9.
    发明授权
    Secure broadcast beacon communications 有权

    公开(公告)号：US09860718B2

    公开(公告)日：2018-01-02

    申请号：US15633622

    申请日：2017-06-26

    申请人： Derek D. Kumar

    发明人： Derek D. Kumar

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

    CPC分类号： H04W4/06 ,  H04L63/123 ,  H04W4/80 ,  H04W12/06 ,  H04W12/10

    摘要： 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.

    System and methods for error tolerant content delivery over multicast channels
    10.
    发明授权
    System and methods for error tolerant content delivery over multicast channels 失效
    通过组播通道进行容错内容传送的系统和方法

    公开(公告)号：US08542593B1

    公开(公告)日：2013-09-24

    申请号：US12908853

    申请日：2010-10-20

    申请人： Derek D. Kumar ,  Gregg Brian Levin

    发明人： Derek D. Kumar ,  Gregg Brian Levin

    IPC分类号： G01R31/08 ,  G06F11/00 ,  G08C15/00 ,  H04J1/16 ,  H04J3/14 ,  H04L1/00 ,  H04L12/26

    CPC分类号： H04L1/0078 ,  H04L1/1887 ,  H04L63/0428 ,  H04L2001/0093

    摘要： In one embodiment of the invention, a system and method for error tolerant delivery of data is provided. A data file is received for transmission which includes metadata and data. The metadata includes mandatory portions and optional portions, which are grouped together, respectively. The mandatory portions of the metadata include file control data. The file is parsed into packets and transmitted as a data stream to a plurality of receiver devices. In some cases this data stream may be transmitted multiple times for redundancy. Once the data stream is received, the receiver device may look for transmission errors in the control data of the data stream. If such an error is present the data stream is discarded; otherwise, the receiver device converts the data stream back into the native file format and stored for later playback or queued processing. In some other embodiments, a data rights management (DRM) file is encrypted using a master key, which, in turn, is encrypted with a unique encryption key for each copy of the file. The unique encryption corresponds to a single target receiver. The system may bifurcate each data file into the common encrypted content and the uniquely encrypted portion. The commonly encrypted portion of the file may be transmitted to a plurality of receiver devices using a multicast transmission medium, and the relatively small uniquely encrypted portions may be transmitted in a unicast method to each receiver individually. The receiver device may then reconstitute the DRM data file.

    摘要翻译： 在本发明的一个实施例中，提供了用于容错数据传送的系统和方法。 接收用于传输的数据文件，其中包括元数据和数据。 元数据分别包括强制部分和可选部分，分别组合在一起。 元数据的强制部分包括文件控制数据。 将文件解析成分组并作为数据流发送到多个接收机设备。 在某些情况下，为了冗余，可以多次发送该数据流。 一旦接收到数据流，接收机设备可以在数据流的控制数据中查找传输错误。 如果存在这样的错误，数据流被丢弃; 否则，接收机设备将数据流转换回原始文件格式并存储以供稍后播放或排队处理。 在一些其他实施例中，使用主密钥来加密数据权限管理（DRM）文件，主密钥又用文件的每个副本的唯一加密密钥加密。 唯一的加密对应于单个目标接收器。 该系统可以将每个数据文件分成公共加密内容和唯一加密部分。 可以使用多播传输介质将文件的共同加密部分发送到多个接收机设备，并且可以以单播方式将相对小的唯一加密部分单独地发送到每个接收机。 然后，接收机设备可以重构DRM数据文件。