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.

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。

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.

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。

公开(公告)号：US6014407A

公开(公告)日：2000-01-11

申请号：US914456

申请日：1997-08-19

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

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

IPC分类号： H04B1/40 ,  H04B1/707 ,  H04B1/7097 ,  H04H20/33 ,  H04J9/00 ,  H04J11/00 ,  H04J13/00 ,  H04J13/02 ,  H04L5/02 ,  H04L27/26 ,  H04K1/00

CPC分类号： H04L27/2601 ,  H04B1/406 ,  H04B1/707 ,  H04B1/7097 ,  H04H20/33 ,  H04J9/00 ,  H04L5/023 ,  H04H20/22 ,  H04H2201/183

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.

公开(公告)号：US5966401A

公开(公告)日：1999-10-12

申请号：US579144

申请日：1995-12-27

申请人： Derek D. Kumar

发明人： Derek D. Kumar

IPC分类号： H04B1/707 ,  H04B1/709 ,  H04L1/00 ,  H04B15/00

CPC分类号： H04L1/0071 ,  H04B1/707 ,  H04B1/709 ,  H04L1/0045

摘要： A method and system are provided for the reception of a biorthogonally-modulated RF signal in a simplex free-space system. The method is found to substantially diminish the coupling between the error probabilities of those bits associated with signal selection and those bits associated with signal polarity in prior art biorthogonal receivers. By decoupling the error probabilities, the polarity information error rate is reduced and consequently the overall error rate of the receiver system is improved. The receiver system preserves soft-decision reliability information for the signal selection bits in a manner so that the information is insensitive to uncompensated amplitude fluctuations in the received signal. A symbol deinterleaver in the receiver is located between the correlators and the bit estimators. The method and system are applicable to all known biorthogonal signal sets but requires a specific interleaving structure in the corresponding transmitter system.

摘要翻译： 提供了一种在单工自由空间系统中接收双向自调制的RF信号的方法和系统。 发现该方法基本上减少了与现有技术的双正交接收机相关联的那些与信号选择相关的位的误差概率与与信号极性相关的位的耦合。 通过去除误差概率，降低了极性信息误差率，从而提高了接收机系统的总体错误率。 接收机系统以这样的方式保留信号选择比特的软判决可靠性信息，使得信息对接收信号中未补偿的振幅波动不敏感。 接收机中的符号解交织器位于相关器和位估计器之间。 该方法和系统适用于所有已知的双正交信号组，但在相应的发射机系统中需要特定的交织结构。

公开(公告)号：US20130276065A1

公开(公告)日：2013-10-17

申请号：US13916009

申请日：2013-06-12

申请人： Derek D. Kumar ,  Hui Huo ,  Tamilselvakumar Vengan ,  Nagendra Siravara

发明人： Derek D. Kumar ,  Hui Huo ,  Tamilselvakumar Vengan ,  Nagendra Siravara

IPC分类号： H04L29/06

CPC分类号： H04L63/062 ,  H04L45/16 ,  H04L63/0435 ,  H04L63/08 ,  H04L63/101

摘要： In one embodiment of the invention, a system and method for receiving and correcting content is provided. A receiver receives a plurality of transmission with embedded content key identifiers. Data packets for which the receiver has a corresponding authentication key are authenticated. Non-successful authentications, or data packets without a corresponding authentication key, are ignored by the receiver. The receiver checks if the content is encrypted. If so, the content may also be decrypted using content decryption keys stored within the receiver. Authentication keys and decryption keys may be updated via secure transmissions. The receiver status is monitored for incomplete and/or corrupted content receipt. The failed content may be retransmitted to the receiver over radio transmitters. Failed content may also be supplied to the receiver via the backchannel. Retransmission of the content may be performed according to a content delivery schedule.

摘要翻译： 在本发明的一个实施例中，提供了一种用于接收和校正内容的系统和方法。 接收机接收具有嵌入的内容密钥标识符的多个传输。 对接收机具有相应认证密钥的数据包进行认证。 不成功的认证或没有相应认证密钥的数据包被接收机忽略。 接收器检查内容是否被加密。 如果是这样，也可以使用存储在接收机内的内容解密密钥对内容进行解密。 验证密钥和解密密钥可以经由安全传输来更新。 对收件人状态进行监控，以了解不完整和/或损坏的内容收据。 失败的内容可以通过无线电发射机重传到接收机。 还可以通过反向通道向接收机提供失败的内容。 可以根据内容传送时间表来执行内容的重传。

公开(公告)号：US06246698B1

公开(公告)日：2001-06-12

申请号：US09197911

申请日：1998-11-24

申请人： Derek D. Kumar

发明人： Derek D. Kumar

IPC分类号： H04J105

CPC分类号： H04H20/22 ,  H04H20/33 ,  H04H2201/183 ,  H04H2201/20 ,  H04L1/0066 ,  H04L1/0069 ,  H04L1/007 ,  H04L5/0005

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： 提供了一种方法和系统。 带内在线（IBOC）FM波段数字音频广播（DAB）信号的发送和接收。 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。

公开(公告)号：US5949796A

公开(公告)日：1999-09-07

申请号：US666985

申请日：1996-06-19

申请人： Derek D. Kumar

发明人： Derek D. Kumar

IPC分类号： H04H20/33 ,  H04L1/00 ,  H04J1/05 ,  H04J1/12

CPC分类号： H04H20/22 ,  H04H20/33 ,  H04L1/0066 ,  H04L1/007 ,  H04H2201/183 ,  H04H2201/20 ,  H04L1/0069 ,  H04L5/0005

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.

公开(公告)号：US5862186A

公开(公告)日：1999-01-19

申请号：US566073

申请日：1995-12-01

申请人： Derek D. Kumar

发明人： Derek D. Kumar

IPC分类号： H04B1/707 ,  H04L1/00 ,  H04L27/06

CPC分类号： H04L1/0057 ,  H04B1/707 ,  H04L1/0059

摘要： A method and system are provided for the reception of a biorthogonally-modulated RF signal in a simplex free-space system. The method is found to substantially diminish the coupling between the error probabilities of those bits associated with signal selection and those bits associated with signal polarity in prior art biorthogonal receivers. By decoupling the error probabilities, the polarity information error rate is reduced and consequently the overall error rate of the receiver system is improved. The receiver system preserves soft-decision reliability information for the signal selection bits in a manner so that the information is insensitive to uncompensated amplitude fluctuations in the received signal. The method and system are applicable to all known biorthogonal signal sets but requires a specific interleaving structure in the corresponding transmitter system.

摘要翻译： 提供了一种在单工自由空间系统中接收双向自调制的RF信号的方法和系统。 发现该方法基本上减少了与现有技术的双正交接收机相关联的那些与信号选择相关的位的误差概率与与信号极性相关的位的耦合。 通过去除误差概率，降低了极性信息误差率，从而提高了接收机系统的总体错误率。 接收机系统以这样的方式保留信号选择比特的软判决可靠性信息，使得信息对接收信号中未补偿的振幅波动不敏感。 该方法和系统适用于所有已知的双正交信号组，但在相应的发射机系统中需要特定的交织结构。