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1.发明授权Method and apparatus of a multi-code code division multiple access receiver having shared accumulator circuits 失效具有共享累加器电路的多码分多址接收机的方法和装置
公开(公告)号：US5881056A
公开(公告)日：1999-03-09
申请号：US700257
申请日：1996-08-20
CPC分类号： H04B1/709 , H04B1/707 , H04B1/7115 , H04J13/0077 , H04B2201/70714
摘要： A Multi-Code (MC) Code Division Multiple Access (CDMA) receiver receives N (where N>1) encoded signal channels over multiple air signal paths. The MC-CDMA receiver receives and demodulates the N encoded signal channels into N signal samples and includes a common circuit for time-sharing an accumulator, for accumulating the N signal samples, among a plurality of second correlators. Each of the plurality of second correlator means utilizes the time-shared accumulator to accumulate samples from each of the N signals which are then decoded into an associated one of the N signal channels.
摘要翻译： 多码（MC）码分多址（CDMA）接收机通过多个空中信号路径接收N（其中N≥1）个编码信号信道。 MC-CDMA接收机将N个编码信号信道接收并解调为N个信号样本，并且包括用于在多个第二相关器之间累积N个信号采样的累加器的时分共享电路。 多个第二相关器装置中的每一个利用时间共享累加器来累积来自N个信号中的每一个的样本，然后将其解码为N个信号信道中的一个相关联的信号。
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2.发明授权Method and apparatus of a multi-code code division multiple access receiver having a shared accumulator circuits 失效具有共享累加器电路的多码分多址接收机的方法和装置
公开(公告)号：US5870378A
公开(公告)日：1999-02-09
申请号：US700262
申请日：1996-08-20
CPC分类号： H04B1/709 , H04B1/707 , H04J13/0048 , H04J13/10
摘要： A Multi-Code (MC) Code Division Multiple Access (CDMA) receiver receives N (where N.gtoreq.1) encoded signal channels over multiple air signal paths. The N signal channels are encoded using a properly chosen subset of Walsh codes based on a Walsh-Matrix, W.sup.M, where M is a power of two. In the disclosed MC-CDMA receiver, a timing correlator means recovers the timing and control signal for the N signal channels received over any particular signal path; a FWHT circuit together with a second correlator means decodes all of the N signal channels.
摘要翻译： 多码（MC）码分多址（CDMA）接收机在多个空中信号路径上接收N（其中N> / = 1）个编码信号信道。 使用基于Walsh-Matrix，WM的适当选择的沃尔什码的子集对N个信号信道进行编码，其中M是2的幂。 在公开的MC-CDMA接收机中，定时相关器装置恢复通过任何特定信号路径接收的N个信号信道的定时和控制信号; 与第二相关器一起的FWHT电路意味着解码所有N个信号信道。
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公开(公告)号：US5737326A
公开(公告)日：1998-04-07
申请号：US678834
申请日：1996-07-12
IPC分类号： H04B1/7085 , H04B1/709 , H04B7/26 , H04J11/00 , H04J13/00 , H04L7/00 , H04B7/216 , H04J13/04
CPC分类号： H04B1/7085 , H04B1/709 , H04B7/264 , H04J13/0077
摘要： A Multi-Code (MC) Code Division Multiple Access (CDMA) receiver receives N (where N>1) encoded signal channels over multiple air signal paths. In the MC-CDMA receiver, once a timing correlator means has recovered the timing and control signals for the data signal received over any particular signal path, those timing and control signals are utilized by each of the N data (second type) correlator means for decoding and despreading an associated one of the N data signal channels received over that path.
摘要翻译： 多码（MC）码分多址（CDMA）接收机通过多个空中信号路径接收N（其中N≥1）个编码信号信道。 在MC-CDMA接收机中，一旦定时相关器装置恢复了用于在任何特定信号路径上接收的数据信号的定时和控制信号，则这些定时和控制信号由N个数据（第二类型）相关器装置中的每一个利用 解码和解扩通过该路径接收的N个数据信号信道中的相关一个。
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4.发明授权公开(公告)号：US06775302B1
公开(公告)日：2004-08-10
申请号：US09459439
申请日：1999-12-13
IPC分类号： H04J306
CPC分类号： H04Q11/0478 , H04L2012/5674
摘要： A communications system includes a physical layer device (PLD) and a logical link device (LLD), each having respective send and receive interfaces being substantially identical to define symmetrical interfaces for the system. Accordingly, design and manufacturing is simplified compared to conventional systems. In addition, advantages are also provided in terms of loopback capability and packaging options. The PLD comprises a PLD send interface including PLD parallel information outputs, and a PLD receive interface including PLD parallel information inputs. Similarly, the LLD comprises an LLD receive interface including LLD parallel information inputs, and an LLD send interface including LLD parallel information outputs. Parallel communications channels connect the PLD information outputs to respective LLD information inputs, and connect the LLD information outputs to respective PLD information inputs. The PLD send interface and the LLD send interface are substantially identical, and the PLD receive interface and the LLD receive interface are substantially identical to thereby define the symmetrical interfaces for the system. In view of the symmetrical interfaces, the PLD and the LLD may operate in a push-push configuration. Deskewing features are also provided.
摘要翻译： 通信系统包括物理层设备（PLD）和逻辑链路设备（LLD），每个物理层设备（LLD）各自具有相同的发送和接收接口，以定义用于系统的对称接口。 因此，与常规系统相比，设计和制造被简化。 此外，还提供了环回能力和封装选项方面的优势。 PLD包括包括PLD并行信息输出的PLD发送接口和包括PLD并行信息输入的PLD接收接口。 类似地，LLD包括包括LLD并行信息输入的LLD接收接口和包括LLD并行信息输出的LLD发送接口。 并行通信通道将PLD信息输出连接到相应的LLD信息输入，并将LLD信息输出连接到相应的PLD信息输入。 PLD发送接口和LLD发送接口基本相同，PLD接收接口和LLD接收接口基本相同，从而定义了系统的对称接口。 鉴于对称接口，PLD和LLD可以以推 - 推配置运行。 还提供脱色功能。
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5.发明授权公开(公告)号：US07486703B2
公开(公告)日：2009-02-03
申请号：US10899078
申请日：2004-07-27
IPC分类号： H04J3/00
CPC分类号： H04Q11/0478 , H04L2012/5674
摘要： A communications system includes a physical layer device (PLD) and a logical link device (LLD), each having respective send and receive interfaces being substantially identical to define symmetrical interfaces for the system. Accordingly, design and manufacturing is simplified compared to conventional systems. In addition, advantages are also provided in terms of loopback capability and packaging options. The PLD comprises a PLD send interface including PLD parallel information outputs, and a PLD receive interface including PLD parallel information inputs. Similarly, the LLD comprises an LLD receive interface including LLD parallel information inputs, and an LLD send interface including LLD parallel information outputs. Parallel communications channels connect the PLD information outputs to respective LLD information inputs, and connect the LLD information outputs to respective PLD information inputs. The PLD send interface and the LLD send interface are substantially identical, and the PLD receive interface and the LLD receive interface are substantially identical to thereby define the symmetrical interfaces for the system. In view of the symmetrical interfaces, the PLD and the LLD may operate in a push-push configuration. Deskewing features are also provided.
摘要翻译： 通信系统包括物理层设备（PLD）和逻辑链路设备（LLD），每个物理层设备（LLD）各自具有相同的发送和接收接口，以定义用于系统的对称接口。 因此，与常规系统相比，设计和制造被简化。 此外，还提供了环回能力和封装选项方面的优势。 PLD包括包括PLD并行信息输出的PLD发送接口和包括PLD并行信息输入的PLD接收接口。 类似地，LLD包括包括LLD并行信息输入的LLD接收接口和包括LLD并行信息输出的LLD发送接口。 并行通信通道将PLD信息输出连接到相应的LLD信息输入，并将LLD信息输出连接到相应的PLD信息输入。 PLD发送接口和LLD发送接口基本相同，PLD接收接口和LLD接收接口基本相同，从而定义了系统的对称接口。 鉴于对称接口，PLD和LLD可以以推 - 推配置运行。 还提供脱色功能。
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公开(公告)号：US06192088B1
公开(公告)日：2001-02-20
申请号：US09052455
申请日：1998-03-31
申请人： Ahmad K. Aman , Cecil William Farrow , Hong Jiang , Agesino Primatic, Jr. , Charles Albert Webb, III
发明人： Ahmad K. Aman , Cecil William Farrow , Hong Jiang , Agesino Primatic, Jr. , Charles Albert Webb, III
IPC分类号： H04L2714
CPC分类号： H04L27/066 , H04L2027/0053 , H04L2027/0081 , H04L2027/0087
摘要： A digital carrier recovery system includes at least two modes of operation, namely, an acquisition mode and a tracking mode. The bandwidth of the carrier recovery loop filter is different for the acquisition mode and the tracking mode. In the acquisition mode, the digital phase-locked loop seeks and locks to the long term frequency offset of the received carrier signal. In the tracking mode, the digital phase-locked loop tracks the instantaneous variations in the carrier phase. Switching between the acquisition mode and the tracking mode is realized digitally, and includes programmable hysteresis, resulting in optimal performance in the presence of signals having high levels of phase noise (jitter). More specifically, the carrier recovery loop filter “locks” to the pilot signal of an incoming signal, e.g., a vestigial side band (VSB) video signal, by employing a so-called digital vector tracking phase-locked loop that demodulates the VSB signal. The digital vector tracking phase-locked loop includes a complex filter, i.e., a so-called vector tracking filter, that very quickly locks to the pilot signal of the passband VSB signal and once locked to the pilot signal, switches to the tracking mode that provides significantly better tracking of phase noise. The demodulation is achieved by employing a complex multiplication of the incoming signal with a complex exponential sequence to obtain an in-phase (I-phase) component and a quadrature-phase (Q-phase) component. The complex exponential sequence is generated, in one embodiment, by employing a SIN/COS look up table that is driven by a phase difference signal generated by the digital vector tracking phase-locked loop. A residual direct current (dc) component in the I-phase component caused by the pilot signal is removed, resulting in a baseband I/Q signal. A technical advantage of this carrier recovery invention is that the bandwidth of the phase-locked loop filter can be different for the acquisition mode and the tracking mode. This allows for optimal performance in both the acquisition and tracking modes of operation.
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7.发明申请METHOD, SYSTEM AND COMPUTER PROGRAM PRODUCT FOR MEASURING A COMMUNICATION FROM A FIRST DEVICE TO A SECOND DEVICE 有权用于测量从第一设备到第二设备的通信的方法，系统和计算机程序产品公开(公告)号：US20120221881A1
公开(公告)日：2012-08-30
申请号：US13505508
申请日：2010-11-18
IPC分类号： G06F1/12
CPC分类号： H04L43/0852 , H04L43/106 , H04L47/10
摘要： In response to communications from a first device to a second device, respective phase differences are estimated between a first clock of the first device and a second clock of the second device. A first average phase difference is computed within a percentile of a first subset of the respective phase differences. The percentile is less than 100. A second average phase difference is computed within the percentile of a second subset of the respective phase differences. The second subset is a modification of the first subset. The second average phase difference is computed in response to the first average phase difference and the modification.
摘要翻译： 响应于从第一设备到第二设备的通信，在第一设备的第一时钟和第二设备的第二时钟之间估计相应的相位差。 在相应相位差的第一子集的百分位数内计算第一平均相位差。 百分位数小于100.在相应相位差的第二子集的百分位数内计算第二平均相位差。 第二子集是第一子集的修改。 响应于第一平均相位差和修改来计算第二平均相位差。
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公开(公告)号：US06819683B2
公开(公告)日：2004-11-16
申请号：US09766079
申请日：2001-01-19
IPC分类号： G01R3108
CPC分类号： H04L25/14 , H04L7/0083 , H04L7/04 , H04L7/10
摘要： A communications system includes N parallel communications channels connecting first and second devices. The N channels may include N−1 channels for carrying information symbols, and an Nth channel for facilitating deskewing and word framing. The first device may include an alignment symbol generator for generating alignment symbols on the Nth channel, and a word framing code generator for generating word framing codes on the Nth channel. The second device may include a deskewer for aligning received information symbols based upon the alignment symbols, and a word framer for determining word framing based upon the word framing codes. The word frame code generator in the first device or transmitter, and the word framer in the second device or receiver provide the desired feature of knowledge of where each word starts or begins. The start of each word may be determined in terms of a time and a corresponding one of the N−1 channels where the word starts. The word framing code generator may generate word framing codes comprising at least one predetermined word framing code. Alternately, the word framing code generator may generate word framing codes including at least one changeable word framing code based upon information symbols.
摘要翻译： 通信系统包括连接第一和第二设备的N个并行通信信道。 N个信道可以包括用于携带信息符号的N-1个信道，以及用于促进偏斜校正和字框架的第N个信道。 第一设备可以包括用于在第N个信道上产生对齐符号的对准符号发生器，以及用于在第N个信道上产生字成帧代码的字成帧代码发生器。 第二装置可以包括用于基于对准符号对准接收到的信息符号的偏移器，以及用于基于字成帧代码确定字成帧的字成像器。 第一设备或发送器中的字代码生成器以及第二设备或接收器中的成帧器提供了每个字开始或开始的位置的所需知识特征。 可以根据时间和单词开始的N-1个频道中的相应一个来确定每个单词的开始。 单词成帧代码生成器可以生成包括至少一个预定字成帧代码的字成帧代码。 或者，字成帧代码生成器可以基于信息符号生成包括至少一个可变字成帧代码的字成帧码。
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公开(公告)号：US06678842B1
公开(公告)日：2004-01-13
申请号：US09459848
申请日：1999-12-13
IPC分类号： G11B500
CPC分类号： H04L25/14 , H04L1/0061
摘要： A communications system includes first and second devices connected by parallel communications channels. The first device preferably comprises a string-based framing coder for determining and appending a string-based framing code to each information symbol string of information symbol strings to be transmitted in parallel over respective parallel communications channels. Each string-based framing code is preferably based upon at least some of the information symbols in the respective information symbol string. In addition, the second device preferably includes a deskewer for aligning received parallel information symbol strings based upon the string-based framing codes. In other words, the string-based framing codes and their use to align received information symbol strings permit the information symbol to be transmitted at high rates and over relatively long distances and thereby be subject skew. The information symbols may be binary bits. The string-based coder may comprise a cyclic redundancy checking (CRC) coder for determining and appending CRC codes to respective information bit strings. Thus, the deskewer may comprise a CRC framer for framing the information bit strings based upon the CRC codes.
摘要翻译： 通信系统包括通过并行通信信道连接的第一和第二设备。 第一设备优选地包括基于串的成帧编码器，用于确定并将基于串的成帧代码附加到要在各个并行通信信道上并行发送的信息符号串的每个信息符号串。 每个基于字符串的成帧代码优选地基于相应信息符号串中的至少一些信息符号。 此外，第二装置优选地包括用于基于基于字符串的成帧代码对准所接收的并行信息符号串的偏移台。 换句话说，基于串的成帧代码及其用于对准接收到的信息符号串的使用允许以高速率和相对长的距离传输信息符号，从而受到偏差。 信息符号可以是二进制位。 基于串的编码器可以包括循环冗余校验（CRC）编码器，用于确定和附加到相应信息比特串的CRC码。 因此，台式电脑可以包括用于基于CRC码对信息位串进行成帧的CRC成帧器。
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10.发明授权Method, system and computer program product for measuring a communication from a first device to a second device 有权用于测量从第一设备到第二设备的通信的方法，系统和计算机程序产品公开(公告)号：US08750335B2
公开(公告)日：2014-06-10
申请号：US13505508
申请日：2010-11-18
CPC分类号： H04L43/0852 , H04L43/106 , H04L47/10
摘要： In response to communications from a first device to a second device, respective phase differences are estimated between a first clock of the first device and a second clock of the second device. A first average phase difference is computed within a percentile of a first subset of the respective phase differences. The percentile is less than 100. A second average phase difference is computed within the percentile of a second subset of the respective phase differences. The second subset is a modification of the first subset. The second average phase difference is computed in response to the first average phase difference and the modification.
摘要翻译： 响应于从第一设备到第二设备的通信，在第一设备的第一时钟和第二设备的第二时钟之间估计相应的相位差。 在相应相位差的第一子集的百分位数内计算第一平均相位差。 百分位数小于100.在相应相位差的第二子集的百分位数内计算第二平均相位差。 第二子集是第一子集的修改。 响应于第一平均相位差和修改来计算第二平均相位差。
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