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71. 发明申请

US20100309957A1 CONTINUOUS TIME CHAOS DITHERING 有权
标题翻译：连续时间消失
公开(公告)号：US20100309957A1
公开(公告)日：2010-12-09
申请号：US12480264
申请日：2009-06-08
申请人： David B. Chester , Alan J. Michaels
发明人： David B. Chester , Alan J. Michaels
IPC分类号： H04B1/00 , H04B1/707
CPC分类号： H04B1/707 , H04J13/0018 , H04J13/102
摘要： Embodiments of the present invention provide a system and method for further reducing cyclostationarity and correspondingly energy density in a chaotic spread spectrum data communication channel, by digitally generating a first chaotic sequence of values to form a spreading code. The spreading code is then used to form a digital IF spread spectrum signal having a uniform sampling interval. The digital IF spread spectrum signal is converted to a sampled analog IF spread spectrum signal at a conversion rate substantially equal to the uniform sampling interval. The duration of the sampling interval is then selectively varied in accordance with a first pseudo-random sequence, thereby introducing a known dither in the analog IF spread spectrum signal. After introducing the known dither, the analog IF spread spectrum signal is upconverted to an analog RF spread spectrum signal. The first pseudo-random sequences may be designed to be a chaotic sequence.
摘要翻译：本发明的实施例提供一种系统和方法，用于通过数字产生值的第一混沌序列以形成扩展码，来进一步减少混沌扩频数据通信信道中的周期平稳性和相应的能量密度。然后扩展码用于形成具有均匀采样间隔的数字IF扩频信号。数字IF扩频信号以基本上等于均匀采样间隔的转换速率被转换为采样的模拟IF扩频信号。然后根据第一伪随机序列选择性地改变采样间隔的持续时间，从而在模拟IF扩频信号中引入已知的抖动。在引入已知的抖动之后，模拟IF扩频信号被上转换成模拟RF扩频信号。第一伪随机序列可以被设计为混沌序列。

72. 发明申请

US20090310650A1 FEATURELESS COHERENT CHAOTIC AMPLITUDE MODULATION 有权
标题翻译：特征相干混沌振幅调制
公开(公告)号：US20090310650A1
公开(公告)日：2009-12-17
申请号：US12137593
申请日：2008-06-12
申请人： David B. Chester , Alan J. Michaels
发明人： David B. Chester , Alan J. Michaels
IPC分类号： H04B1/707
CPC分类号： H04L27/001 , H04J13/0018 , H04J13/10 , H04L25/4917
摘要： Systems (400, 500, 600) and methods (300) for generating a chaotic amplitude modulated signal absent of cyclostationary features by preserving a constant variance. The methods involve: generating a PAM signal including pulse amplitude modulation having a periodically changing amplitude; generating a first part of a constant power envelope signal (FPCPES) by dividing the PAM signal by a square root of a magnitude of the PAM signal; generating a second part of the constant power envelope signal (SPCPES) having a magnitude equal to a square root of one minus the magnitude of the PAM signal; and generating first and second spreading sequences (FSS and SSS). The methods also involve combining the FPCPES with the FSS to generate a first product signal (FPS) and combining the SPCPES with the SSS to generate a second product signal (SPS). A constant power envelope signal is generated using the FPS and SPS.
摘要翻译：用于通过保持恒定方差来产生不存在循环平稳特征的混沌幅度调制信号的系统（400,500,600）和方法（300）。所述方法包括：产生包括具有周期性变化幅度的脉冲幅度调制的PAM信号; 通过将PAM信号除以PAM信号幅度的平方根来产生恒定功率包络信号（FPCPES）的第一部分; 产生具有等于1的平方根的量值减去PAM信号的幅度的恒定功率包络信号（SPCPES）的第二部分; 以及产生第一和第二扩展序列（FSS和SSS）。这些方法还涉及将FPCPES与FSS组合以产生第一产品信号（FPS）并将SPCPES与SSS组合以产生第二产品信号（SPS）。使用FPS和SPS生成恒定功率包络信号。

73. 发明申请

US20090296860A1 ADAPTIVE CORRELATION 有权
标题翻译：自适应关联
公开(公告)号：US20090296860A1
公开(公告)日：2009-12-03
申请号：US12131386
申请日：2008-06-02
申请人： David B. Chester , Alan J. Michaels
发明人： David B. Chester , Alan J. Michaels
IPC分类号： H04L27/06 , H03D1/00
CPC分类号： H04L7/042 , G06F17/15 , H04B1/70752
摘要： A method is provided for correlating samples of a received signal and samples of an internally generated/stored sample sequence (“IGSSS”). The method involves performing a first iteration of a first-resolution correlation state. The first-resolution correlation state involves: selecting a first N sets of samples from the received signal; selecting a first set of samples from the IGSSS; and concurrently comparing each of the N sets of samples with the first set of samples to determine if a correlation exists between the same. If it is determined that a correlation does not exist between one of the N sets of samples and the first set of samples, then a second iteration of the first-resolution correlation state is performed. If it is determined that a correlation exists between one of the N sets of samples and the first set of samples, then a first iteration of a second-resolution correlation state is performed.
摘要翻译：提供了一种用于使接收信号的样本与内部生成/存储的样本序列（“IGSSS”）的样本相关的方法。该方法涉及执行第一分辨率相关状态的第一迭代。第一分辨率相关状态包括：从接收信号中选择前N组样本; 从IGSSS中选择第一组样本; 并且同时将N个样本集合中的每一个与第一组样本进行比较，以确定其中是否存在相关性。如果确定在N组样本之一和第一组采样之间不存在相关性，则执行第一分辨率相关状态的第二迭代。如果确定在N组样本之一和第一组采样之间存在相关性，则执行第二分辨率相关状态的第一迭代。

74. 发明申请

US20090044080A1 Closed Galois Field Combination 有权
标题翻译：封闭的伽罗瓦域组合
公开(公告)号：US20090044080A1
公开(公告)日：2009-02-12
申请号：US11756086
申请日：2007-05-31
申请人： Alan J. Michaels , David B. Chester
发明人： Alan J. Michaels , David B. Chester
IPC分类号： H03M13/00
CPC分类号： G06F7/725
摘要： A method is provided for combining two or more input sequences in a communications system to increase a repetition period of the input sequences in a resource-efficient manner. The method includes a receiving step, a mapping step, and a generating step. The receiving step involves receiving a first number sequence and a second number sequence, each expressed in a Galois field GF[pk]. The mapping step involves mapping the first and second number sequences to a Galois extension field GF[pk+1]. The generating step involves generating an output sequence by combining the first number sequence with the second number sequence utilizing a Galois field multiplication operation in the Galois extension field GF[pk+1]. p is a prime number. k is an integer. pk+1 defines a finite field size of the Galois extension field GF[pk+1].
摘要翻译：提供一种用于组合通信系统中的两个或更多个输入序列以以资源有效的方式增加输入序列的重复周期的方法。该方法包括接收步骤，映射步骤和生成步骤。接收步骤包括接收在伽罗瓦域GF [pk]中表示的第一数字序列和第二数字序列。映射步骤涉及将第一和第二数字序列映射到Galois扩展字段GF [pk + 1]。生成步骤涉及通过使用Galois扩展字段GF [pk + 1]中的伽罗瓦域乘法运算来组合第一数字序列与第二数字序列来生成输出序列。 p是素数。 k是整数。 pk + 1定义Galois扩展字段GF [pk + 1]的有限域大小。

75. 发明申请

US20080307024A1 Mixed Radix Number Generator with Chosen Statistical Artifacts 有权
标题翻译：混合基数发生器与选择的统计人工制品
公开(公告)号：US20080307024A1
公开(公告)日：2008-12-11
申请号：US11759276
申请日：2007-06-07
申请人： Alan J. Michaels , David B. Chester
发明人： Alan J. Michaels , David B. Chester
IPC分类号： G06F7/72 , G06F17/10 , G06F7/58
CPC分类号： G06F7/58 , G06F7/584 , G06F7/724
摘要： A method is provided for masking a process used in generating a number sequence. The method includes generating a first sequence of numbers contained within a Galois field GF[M]. The method also includes performing a first modification to a first number in the first sequence of numbers. The first modification includes summing the first number with a result of a modulo P operation performed on a second number of the first sequence that proceeds the first number. M is relatively prime with respect to P. The method further includes performing a second modification to the first random number. The second modification is comprised of a modulo P operation. This second modification is performed subsequent to the first modification. The method includes repeating the first and second modification for a plurality of numbers comprising the first sequence of numbers to generate a second sequence of numbers.
摘要翻译：提供了一种用于掩蔽用于产生数字序列的过程的方法。该方法包括产生包含在伽罗瓦域GF [M]内的第一序列序列。该方法还包括对第一数字序列中的第一个数字执行第一修改。第一修改包括将第一个数字与对第一个数字进行的第一个序列的第二个数量执行的模P运算的结果相加。 M相对于P是相对主要的。该方法还包括对第一随机数执行第二修改。第二修改由模P操作组成。该第二修改在第一修改之后执行。该方法包括对包括第一序列序列的多个数字重复第一和第二修改以产生第二数字序列。

76. 发明申请

US20080304666A1 Spread Spectrum Communications System and Method Utilizing Chaotic Sequence 有权
标题翻译：扩频通信系统和利用混沌序列的方法
公开(公告)号：US20080304666A1
公开(公告)日：2008-12-11
申请号：US11759273
申请日：2007-06-07
申请人： David B. Chester , Alan J. Michaels
发明人： David B. Chester , Alan J. Michaels
IPC分类号： H04L9/00 , G06F7/38
CPC分类号： H04J13/0003 , H04B1/7075 , H04J13/0018 , H04J13/10
摘要： A method is provided for generating a coherent chaotic sequence spread spectrum communications system. The method includes phase modulating a carrier with information symbols. The method also includes generating a string of discrete time chaotic samples. The method further includes modulating the carrier in a chaotic manner using the string of discrete time chaotic samples. Each of the discrete time chaotic samples has a shorter sample time interval than the duration of the information symbols. The generating step includes selecting a plurality of polynomial equations. The generating step also includes using residue number system (RNS) arithmetic operations to respectively determine solutions for the polynomial equations. The solutions are iteratively computed and expressed as RNS residue values. The generating step further includes determining a series of digits in the weighted number system based on the RNS residue values. The method further includes synchronizing the chaos generated at the receiver with that generated at the transmitter without periodic transfer of state update information.
摘要翻译：提供了一种用于产生相干混沌序列扩频通信系统的方法。该方法包括用信息符号对载波进行相位调制。该方法还包括产生一串离散时间混沌样本。该方法还包括使用离散时间混沌样本串以混沌方式调制载体。每个离散时间混沌样本具有比信息符号的持续时间更短的采样时间间隔。生成步骤包括选择多个多项式方程式。生成步骤还包括使用残差数系统（RNS）算术运算来分别确定多项式方程的解。迭代计算溶液并表示为RNS残留值。生成步骤还包括基于RNS残差值来确定加权数字系统中的一系列数字。该方法还包括在接收机处产生的混沌与在发射机处产生的混沌同步，而不会周期性地传送状态更新信息。

77. 发明申请

US20080198832A1 Low Level Sequence as an Anti-Tamper MEchanism 有权
标题翻译：低级序列作为防篡改机制
公开(公告)号：US20080198832A1
公开(公告)日：2008-08-21
申请号：US11675120
申请日：2007-02-15
申请人： David B. Chester
发明人： David B. Chester
IPC分类号： H04J1/00
CPC分类号： H04J1/02 , H04L27/2601 , H04L63/12 , H04L63/18 , H04W12/10
摘要： A method is provided for tamper detection of a transmitted signal. The method is comprised of generating a first digital data signal having a first data rate. The method is also comprised of generating a second digital data signal having a second data rate. The method is further comprised of concurrently transmitting the first digital data signal at a first carrier frequency using a first modulation format and the second digital data signal at a second carrier frequency using a second modulation format. The method includes selecting the second carrier frequency and a bandwidth of the second digital data signal so that the second digital data signal is contained within a frequency spectrum defined by a bandwidth of the first digital data signal. The method also includes verifying an integrity of the first digital data signal at a remote receiver based on defection at the remote receiver of the second digital data signal. A system (100) is also provided for generating a tamper-protected transmitted signal.
摘要翻译：提供了一种用于对发射信号进行篡改检测的方法。该方法包括产生具有第一数据速率的第一数字数据信号。该方法还包括产生具有第二数据速率的第二数字数据信号。该方法还包括使用第一调制格式以第一载波频率同时发送第一数字数据信号，并且使用第二调制格式以第二载波频率发送第二数字数据信号。该方法包括：选择第二载波频率和第二数字数据信号的带宽，使得第二数字数据信号包含在由第一数字数据信号的带宽所限定的频谱内。该方法还包括基于远程接收机在第二数字数据信号上的偏离来验证远程接收机处的第一数字数据信号的完整性。还提供了一种用于产生受篡改保护的发送信号的系统（100）。

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