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1. 发明授权

US5825816A Spectral and power shaping mapper for high data rate signalling 失效
标题翻译：用于高数据速率信号的光谱和功率整形映射器
公开(公告)号：US5825816A
公开(公告)日：1998-10-20
申请号：US851597
申请日：1997-05-05
申请人： Paul Dana Cole , Yuri Goldstein , Yuri Okunev
发明人： Paul Dana Cole , Yuri Goldstein , Yuri Okunev
IPC分类号： H04B14/02 , H04L25/49 , H04L27/34 , H04B1/38
CPC分类号： H04L27/3411 , H04B14/023 , H04L25/4927
摘要： A spectral and power shaping mapper for high data rate signaling modem is provided. Based on data rates and other criteria, groups of incoming bits are grouped together, with a first subgroup of bits being used to generate two sign vectors, a second subgroup of bits being used in conjunction with an appended bit to generate two magnitude manipulation vectors, and a third subgroup of bits being used in a modulus converter to generate a plurality of quotients (r.sub.k). The quotients and magnitude manipulation vectors are used to select two or more sequences of constellation points from a multidimensional constellation. The sequences of selected points are combined with the sign vectors to generate four sequences of octets for a shaping selector. The shaping selector, preferably in the form of a convolutional encoder state machine uses criteria such as lowest cost paths and/or lowest average power in order to select which sequence of octets to output.
摘要翻译：提供了一种用于高数据速率信号调制解调器的频谱和功率整形映射器。基于数据速率和其他标准，输入比特组被分组在一起，其中第一子比特组用于生成两个符号向量，第二子比特组与附加比特结合使用以产生两个幅度操纵向量，并且在模数转换器中使用第三子比特组来产生多个商（rk）。商和幅度操纵向量用于从多维星座中选择两个或更多个星座点序列。所选点的序列与符号向量组合以产生用于整形选择器的四个八位字节序列。成形选择器优选地以卷积编码器状态机的形式使用诸如最低成本路径和/或最低平均功率之类的标准，以便选择要输出哪个八位位组序列。

2. 发明授权

US5838724A Spectral and power shaping mapper for high data rate signalling 失效
标题翻译：光谱和功率整形映射器，用于高数据速率信号
公开(公告)号：US5838724A
公开(公告)日：1998-11-17
申请号：US872630
申请日：1997-06-10
申请人： Paul Dana Cole , Yuri Goldstein , William Hanna
发明人： Paul Dana Cole , Yuri Goldstein , William Hanna
IPC分类号： H04B14/02 , H04L25/49 , H04L27/34 , H04B1/38
CPC分类号： H04L25/4927 , H04B14/023 , H04L27/3411
摘要： A spectral and power shaping mapper for high data rate signaling modem functions in a first mode having spectral and power shaping and using convolutional encoding, a second mode having power shaping, a third mode having power shaping using convolutional encoding, and a fourth mode having straight-forward mapping. Based on data rates and other criteria, incoming bits are grouped together, with a first subgroup of bits used in the first mode to generate two sign vectors (and in the other modes a single vector), a second subgroup of bits used in conjunction with an appended bit in the first, second and third modes to generate at least two magnitude manipulation vectors, and a third subgroup of bits used in a modulus converter to generate a plurality of quotients. The quotients and magnitude manipulation vector(s) are used to select one, two or four sequences of constellation points from a multidimensional constellation depending on mode. The sequences of selected points are combined with the sign vector(s) to generate, one, two or four sequences of octets for a shaping selector. In the first and third modes, the shaping selector employs a convolutional encoder state machine which uses criteria such as lowest cost paths and/or lowest average power in order to select which sequence of octets to output. In the second mode, selection is based on power only. In the fourth mode, the generated octets are output as there is no choice of octets.
摘要翻译：用于高数据速率信令调制解调器的频谱和功率整形映射器在具有频谱和功率整形并且使用卷积编码的第一模式中工作，具有功率整形的第二模式，具有使用卷积编码的功率整形的第三模式，以及具有直线前向映射基于数据速率和其他标准，输入比特被分组在一起，其中在第一模式中使用的第一比特组用于生成两个符号向量（并且在其他模式中生成单个向量），第二子比特组与在第一，第二和第三模式中的附加位以产生至少两个幅度操纵向量，以及在模数转换器中用于生成多个商的位的第三子组。商和幅度操纵向量用于根据模式从多维星座中选择一个，两个或四个星座点序列。所选点的序列与符号向量组合以生成整形选择器的一个，两个或四个八位字节序列。在第一和第三模式中，整形选择器采用卷积编码器状态机，其使用诸如最低成本路径和/或最低平均功率的标准，以便选择要输出的八位字节序列。在第二种模式中，选择仅基于功率。在第四模式中，由于没有八位字节的选择，所以生成的八位字节被输出。

3. 发明授权

US5867529A Shaping filter for high data rate signalling 失效
标题翻译：整形滤波器用于高数据速率信令
公开(公告)号：US5867529A
公开(公告)日：1999-02-02
申请号：US810701
申请日：1997-03-03
申请人： Paul Dana Cole
发明人： Paul Dana Cole
IPC分类号： H04B14/04
CPC分类号： H04B14/048
摘要： A shaping filter for a PAM mapper is provided which manipulates incoming PAM code level signals to produce outgoing PAM code level signals whose frequency spectrum is shaped to meet desired criteria. In manipulating input code level values in(t), the shaping filter preferably utilizes previous output signal values without using previous incoming signal values. In a preferred embodiment, the output code level values out(t) are constrained to an output alphabet which is a predefined subset of code levels within the .mu.-law constellation, and are obtained by manipulating the input signals according to an integer-valued shifting function such that out(t) are code level values within the output alphabet. The preferred shifting function S "shifts" in(t) by a number of places in the output alphabet in the direction opposite the sign of ##EQU1## to provide out(t), where out(t) are .mu.-law code output level values at times t, and a.sub.i are weighting factors chosen to shape the frequency spectrum of out(t). The shaping filter may be used with multidimensional PAM constellations.
摘要翻译：提供了一种用于PAM映射器的整形滤波器，其操作输入的PAM码电平信号以产生其频谱被成形为满足期望标准的输出PAM码电平信号。在处理（t）中的输入码电平值时，整形滤波器优选地利用先前的输出信号值而不使用先前的输入信号值。在优选实施例中，输出码电平值out（t）被约束为输出字母表，输出字母表是mu-da星座内的代码级的预定义子集，并且通过根据整数值移位来操纵输入信号而获得功能使得out（t）是输出字母表中的代码级别值。优选的移动功能S在（t）中以与的符号相反的方向在输出字母表中的位置数量“移动”以提供out（t），其中out（t）是mu-代码输出电平时间t和ai的值是用于使out（t）的频谱成形的加权因子。整形滤波器可以与多维PAM星座一起使用。

4. 发明授权

US06829304B1 Method for clock recovery in MPEG systems 失效
标题翻译： MPEG系统中的时钟恢复方法
公开(公告)号：US06829304B1
公开(公告)日：2004-12-07
申请号：US09957430
申请日：2001-09-20
申请人： Paul Dana Cole
发明人： Paul Dana Cole
IPC分类号： H04B166
CPC分类号： H04N21/4305
摘要： A method for clock recovery comprises a series of steps to be performed in a decoder to adaptively estimate the ratio P/S of the frequency of an encoder system time clock and the frequency of a decoder. The steps include performing a series of overlapping trials N which calculate time differentials dP(n), dS(n), respectively) between selected pairs of temporally separated clock references CRs and arrival times STCs. Each trial concludes by calculating an estimated ratio X according to the formula: X(N)=(&Sgr;dP(n))/(&Sgr;dS(n)) A preferred embodiment of the present invention also includes the step of adjusting the decoder clock in accordance with a damped version of the estimate, thereby “recovering” the encoder STC in the decoder.
摘要翻译：一种用于时钟恢复的方法包括在解码器中执行的一系列步骤，以自适应地估计编码器系统时钟的频率与解码器的频率的比率P / S。这些步骤包括执行一系列重叠试验N，它们分别计算时间上分离的时钟参考CR和到达时间STC之间的时间差dP（n），dS（n））。每个试验通过根据公式计算估计的比率X来得出结论：本发明的优选实施例还包括根据估计的阻尼版本来调整解码器时钟的步骤，从而“解码”解码器中的编码器STC 。

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