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    Configurable all-digital coherent demodulator system for spread spectrum applications
    22.
    发明授权
    Configurable all-digital coherent demodulator system for spread spectrum applications 失效
    可配置的全数字相干解调器系统，用于扩频应用

    公开(公告)号：US07688917B2

    公开(公告)日：2010-03-30

    申请号：US11317524

    申请日：2005-12-22

    Applicant: Ravi Subramanian

    Inventor： Ravi Subramanian

    IPC: H04L27/14 ,  H04L27/16 ,  H04L27/22

    CPC classification number: H04B1/0003 ,  H04B1/0007 ,  H04B1/28 ,  H04B1/406 ,  H04B1/70735 ,  H04B1/7085 ,  H04B2201/70701 ,  H04B2201/70711 ,  H04L25/0204

    Abstract: A configurable all-digital coherent demodulator system for spread spectrum digital communications is disclosed herein. The demodulator system includes an extended and long-code demodulator (ELCD) coupled to a traffic channel demodulator (TCD) and a parameter estimator (PE). The demodulator also includes a pilot assisted correction device (PACD) that is coupled to the PE and the TCD. The ELCD provides a code-demodulated signal to the TCD and the PE. In turn, the TCD provides a demodulated output data signal to the PE. The PACD corrects the phase error of the demodulated output data based on an error estimate that is fed forward from the PE. Accumulation operations in the ELCD, TCD, and PE are all programmable. Similarly, a phase delay in the PACD is also programmable to provide synchronization with the error estimate from the PE.

    Abstract translation: 本文公开了一种用于扩频数字通信的可配置全数字相干解调器系统。 解调器系统包括耦合到业务信道解调器（TCD）和参数估计器（PE）的扩展和长码解调器（ELCD）。 解调器还包括耦合到PE和TCD的导频辅助校正装置（PACD）。 ELCD向TCD和PE提供码解调信号。 反过来，TCD向PE提供解调的输出数据信号。 基于从PE馈送的误差估计，PACD校正解调输出数据的相位误差。 ELCD，TCD和PE中的累加操作都可编程。 类似地，PACD中的相位延迟也是可编程的，以提供与来自PE的误差估计的同步。

    Configurable all-digital coherent demodulator system for spread spectrum applications
    23.
    发明申请
    Configurable all-digital coherent demodulator system for spread spectrum applications 失效
    可配置的全数字相干解调器系统，用于扩频应用

    公开(公告)号：US20060104389A1

    公开(公告)日：2006-05-18

    申请号：US11317524

    申请日：2005-12-22

    Applicant: Ravi Subramanian

    Inventor： Ravi Subramanian

    IPC: H04L27/06 ,  H04B1/10

    CPC classification number: H04B1/0003 ,  H04B1/0007 ,  H04B1/28 ,  H04B1/406 ,  H04B1/70735 ,  H04B1/7085 ,  H04B2201/70701 ,  H04B2201/70711 ,  H04L25/0204

    Abstract: A configurable all-digital coherent demodulator system for spread spectrum digital communications is disclosed herein. The demodulator system includes an extended and long-code demodulator (ELCD) coupled to a traffic channel demodulator (TCD) and a parameter estimator (PE). The demodulator also includes a pilot assisted correction device (PACD) that is coupled to the PE and the TCD. The ELCD provides a code-demodulated signal to the TCD and the PE. In turn, the TCD provides a demodulated output data signal to the PE. The PACD corrects the phase error of the demodulated output data based on an error estimate that is fed forward from the PE. Accumulation operations in the ELCD, TCD, and PE are all programmable. Similarly, a phase delay in the PACD is also programmable to provide synchronization with the error estimate from the PE.

    Abstract translation: 本文公开了一种用于扩频数字通信的可配置全数字相干解调器系统。 解调器系统包括耦合到业务信道解调器（TCD）和参数估计器（PE）的扩展和长码解调器（ELCD）。 解调器还包括耦合到PE和TCD的导频辅助校正装置（PACD）。 ELCD向TCD和PE提供码解调信号。 反过来，TCD向PE提供解调的输出数据信号。 基于从PE馈送的误差估计，PACD校正解调输出数据的相位误差。 ELCD，TCD和PE中的累加操作都可编程。 类似地，PACD中的相位延迟也是可编程的，以提供与来自PE的误差估计的同步。

    Configurable multimode despreader for spread spectrum applications
    24.
    发明申请
    Configurable multimode despreader for spread spectrum applications 有权
    可配置的多模解扩器用于扩频应用

    公开(公告)号：US20060013286A1

    公开(公告)日：2006-01-19

    申请号：US11179356

    申请日：2005-07-11

    Applicant: Ravi Subramanian

    Inventor： Ravi Subramanian

    IPC: H04B1/707

    CPC classification number: H04B1/707 ,  H04B2201/70711

    Abstract: A configurable multimode despreader for spread spectrum applications is disclosed herein. The despreader includes a plurality of data lines, at least one selective coupler coupled to the plurality of data lines, at least one multiplier coupled to the selective coupler, and a code input line coupled to the multiplier. The selective coupler selectively couples one of the plurality of data lines with the multiplier per any one of a plurality of despreading protocols. The multiplier then multiplies a desired input data type received from the selective coupler with a despreading code chip received from the code input line to produce an observation. The programmable multimode despreader supports variable code and data modulation schemes and variable spreading factors.

    Abstract translation: 本文公开了一种用于扩频应用的可配置多模解扩器。 解扩器包括多个数据线，耦合到多个数据线的至少一个选择耦合器，耦合到选择耦合器的至少一个乘法器，以及耦合到乘法器的代码输入线。 所述选择性耦合器根据多个解扩协议中的任何一个选择性地将所述多条数据线中的一条与乘法器相耦合。 然后，乘法器将从选择耦合器接收的期望输入数据类型与从代码输入行接收到的解扩码芯片相乘以产生观察。 可编程多模解扩器支持可变码和数据调制方案和可变扩频因子。

    Wireless spread spectrum communication platform using dynamically reconfigurable logic
    25.
    发明申请
    Wireless spread spectrum communication platform using dynamically reconfigurable logic 有权
    无线扩频通信平台采用动态可重构逻辑

    公开(公告)号：US20050282534A1

    公开(公告)日：2005-12-22

    申请号：US11198692

    申请日：2005-08-05

    Applicant: Ravi Subramanian ,  Uma Jha ,  Joel Medlock

    Inventor： Ravi Subramanian ,  Uma Jha ,  Joel Medlock

    IPC: H04B1/707 ,  H04M3/00

    CPC classification number: H04B1/0003 ,  H04B1/707 ,  H04B2201/7071 ,  H04B2201/70711

    Abstract: A wireless spread spectrum communication platform for processing a communication signal is disclosed herein. The wireless communication platform includes a first computing element, a second computing element, and a reconfigurable interconnect. The first computing element is coupled to the second computing element via the reconfigurable interconnect. A design configuration of the first computing element is heterogeneous with respect to a design configuration of the second computing element. The reconfigurable interconnect has an uncommitted architecture, thereby allowing it to be configured by an outside source to couple portions of the first reconfigurable interconnect with portions of the second reconfigurable interconnect in a variety of combinations. The first computing element, the second computing element, and the reconfigurable interconnect operable to perform discrete functions suitable for processing of the communication signal.

    Abstract translation: 本文公开了一种用于处理通信信号的无线扩频通信平台。 无线通信平台包括第一计算元件，第二计算元件和可重构互连。 第一计算元件经由可重构互连耦合到第二计算元件。 关于第二计算元件的设计配置，第一计算元件的设计配置是异构的。 可重配置互连具有未提交的架构，从而允许其由外部源配置以将第一可重配置互连的部分以各种组合耦合第二可重配置互连的部分。 第一计算元件，第二计算元件和可重构互连可操作以执行适于处理通信信号的离散功能。

    Configurable multimode despreader for spread spectrum applications
    26.
    发明授权
    Configurable multimode despreader for spread spectrum applications 失效
    可配置的多模解扩器用于扩频应用

    公开(公告)号：US06934319B2

    公开(公告)日：2005-08-23

    申请号：US09751785

    申请日：2000-12-29

    Applicant: Ravi Subramanian

    Inventor： Ravi Subramanian

    IPC: H04B1/707 ,  H04L27/30

    CPC classification number: H04B1/707 ,  H04B2201/70711

    Abstract: A configurable multimode despreader for spread spectrum applications is disclosed herein. The despreader includes a plurality of data lines, at least one selective coupler coupled to the plurality of data lines, at least one multiplier coupled to the selective coupler, and a code input line coupled to the multiplier. The selective coupler selectively couples one of the plurality of data lines with the multiplier per any one of a plurality of despreading protocols. The multiplier then multiplies a desired input data type received from the selective coupler with a despreading code chip received from the code input line to produce an observation. The programmable multimode despreader supports variable code and data modulation schemes and variable spreading factors.

    Abstract translation: 本文公开了一种用于扩频应用的可配置多模解扩器。 解扩器包括多个数据线，耦合到多个数据线的至少一个选择耦合器，耦合到选择耦合器的至少一个乘法器，以及耦合到乘法器的代码输入线。 所述选择性耦合器根据多个解扩协议中的任何一个选择性地将所述多条数据线中的一条与乘法器相耦合。 然后，乘法器将从选择耦合器接收的期望输入数据类型与从代码输入行接收到的解扩码芯片相乘以产生观察。 可编程多模解扩器支持可变码和数据调制方案和可变扩频因子。

    Offset correction for a homodyne radio
    27.
    发明授权
    Offset correction for a homodyne radio 失效
    零差收音机的偏移校正

    公开(公告)号：US5748681A

    公开(公告)日：1998-05-05

    申请号：US549363

    申请日：1995-10-27

    Applicant: Vittorio Comino ,  Gerard Joseph Foschini ,  Isam M. Habbab ,  Sanjay Kasturia ,  Jack Salz ,  Michael Edward Prise ,  Ravi Subramanian

    Inventor： Vittorio Comino ,  Gerard Joseph Foschini ,  Isam M. Habbab ,  Sanjay Kasturia ,  Jack Salz ,  Michael Edward Prise ,  Ravi Subramanian

    IPC: H04L7/027 ,  H04L7/04 ,  H04L7/10 ,  H04L25/06

    CPC classification number: H04L25/061 ,  H04L7/046 ,  H04L7/027 ,  H04L7/041 ,  H04L7/10

    Abstract: DC offset cancellation and timing recovery is provided in a homodyne receiver. The homodyne receiver demodulates an RF signal to produce a baseband signal. An initial offset correction module determines an initial DC offset of the baseband signal. An initial offset correction is applied to the baseband signal to provide an initial corrected baseband signal. Wherein, a dynamic DC offset correction module determines a dynamic DC offset. A dynamic DC offset correction is applied to the initial corrected baseband signal providing a dynamic corrected baseband signal. A timing signal is acquired from the baseband signal for synchronizing the receiver to a transmitter. A method for correcting DC offset of a baseband signal in a homodyne receiver is also described.

    Abstract translation: 在零差接收机中提供DC偏移消除和定时恢复。 零差接收机解调RF信号以产生基带信号。 初始偏移校正模块确定基带信号的初始DC偏移。 对基带信号施加初始偏移校正以提供初始校正的基带信号。 其中，动态DC偏移校正模块确定动态DC偏移。 将动态DC偏移校正应用于提供动态校正基带信号的初始校正基带信号。 从用于使接收机同步到发射机的基带信号获取定时信号。 还描述了用于校正零差接收机中的基带信号的DC偏移的方法。

    Method and apparatus to adaptively control the frequency of reception in a digital wireless communication system
    28.
    发明授权
    Method and apparatus to adaptively control the frequency of reception in a digital wireless communication system 失效
    在数字无线通信系统中自适应地控制接收频率的方法和装置

    公开(公告)号：US5581579A

    公开(公告)日：1996-12-03

    申请号：US523032

    申请日：1995-09-01

    Applicant: Nan-Sheng Lin ,  Ravi Subramanian ,  Kenkichi Suzuki

    Inventor： Nan-Sheng Lin ,  Ravi Subramanian ,  Kenkichi Suzuki

    IPC: H04L7/033 ,  H04L7/04 ,  H04L27/152 ,  H04L27/22

    CPC classification number: H04L27/152 ,  H04L7/0334 ,  H04L7/042

    Abstract: In a digital wireless communication system operating between a first unit and a second unit, the first unit transmits a digitally encoded RF signal at a first frequency in a plurality of a non-contiguous time slots to the second unit. The second unit receives the digitally encoded RF signals. The received RF digitally encoded signal is converted to an intermediate frequency (IF). An A to D converter samples the received IF digitally encoded signals and generates a plurality of discrete binary symbols during one of the plurality of non-contiguous time slots. A phase error signal is generated for each one of the plurality of discrete binary symbols. A frequency error signal is generated for the subsequent symbol in accordance with .DELTA.f(n+1)=.DELTA.f(n)+g.sub.1 (.crclbar.(n)-.crclbar.(n)). The conversion of the RF signal to intermediate frequency is controlled in response to the frequency error signal. The control is adjusted after the one time slot but prior to the commencement of a subsequent one of the plurality of non-contiguous time slots.

    Abstract translation: 在第一单元和第二单元之间操作的数字无线通信系统中，第一单元以多个非连续时隙中的第一频率向第二单元发送数字编码的RF信号。 第二单元接收数字编码的RF信号。 所接收的RF数字编码信号被转换成中频（IF）。 A至D转换器对所接收的IF数字编码信号进行采样，并在多个非连续时隙之一产生多个离散二进制符号。 对于多个离散二进制符号中的每一个生成相位误差信号。 根据DELTA f（n + 1）= DELTA f（n）+ g1（（ - ）（n） - + E，otl（ - ）+ EE（n））为后续符号生成频率误差信号。 响应于频率误差信号来控制RF信号到中频的转换。 控制在一个时隙之后但是在多个非连续时隙中的后续的一个时间段的开始之前被调整。

    Configurable multimode despreader for spread spectrum applications
    29.
    发明授权
    Configurable multimode despreader for spread spectrum applications 有权
    可配置的多模解扩器用于扩频应用

    公开(公告)号：US08804789B2

    公开(公告)日：2014-08-12

    申请号：US11179356

    申请日：2005-07-11

    Applicant: Ravi Subramanian

    Inventor： Ravi Subramanian

    IPC: H04L27/30

    CPC classification number: H04B1/707 ,  H04B2201/70711

    Abstract: A configurable multimode despreader for spread spectrum applications is disclosed herein. The despreader includes a plurality of data lines, at least one selective coupler coupled to the plurality of data lines, at least one multiplier coupled to the selective coupler, and a code input line coupled to the multiplier. The selective coupler selectively couples one of the plurality of data lines with the multiplier per any one of a plurality of despreading protocols. The multiplier then multiplies a desired input data type received from the selective coupler with a despreading code chip received from the code input line to produce an observation. The programmable multimode despreader supports variable code and data modulation schemes and variable spreading factors.

    Abstract translation: 本文公开了一种用于扩频应用的可配置多模解扩器。 解扩器包括多个数据线，耦合到多个数据线的至少一个选择耦合器，耦合到选择耦合器的至少一个乘法器，以及耦合到乘法器的代码输入线。 所述选择性耦合器根据多个解扩协议中的任何一个选择性地将所述多条数据线中的一条与乘法器相耦合。 然后，乘法器将从选择耦合器接收的期望输入数据类型与从代码输入行接收到的解扩码芯片相乘以产生观察。 可编程多模解扩器支持可变码和数据调制方案和可变扩频因子。

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