公开(公告)号：US08804789B2

公开(公告)日：2014-08-12

申请号：US11179356

申请日：2005-07-11

申请人： Ravi Subramanian

发明人： Ravi Subramanian

IPC分类号： H04L27/30

CPC分类号： H04B1/707 ,  H04B2201/70711

摘要： 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.

摘要翻译： 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。

公开(公告)号：US20120318403A1

公开(公告)日：2012-12-20

申请号：US13162739

申请日：2011-06-17

申请人： Jospeh Perry Cohen ,  David John Farese ,  Ravi Subramanian

发明人： Jospeh Perry Cohen ,  David John Farese ,  Ravi Subramanian

IPC分类号： B65B1/04

CPC分类号： F17C5/06 ,  F17C7/02 ,  F17C2203/0604 ,  F17C2203/0663 ,  F17C2221/012 ,  F17C2221/033 ,  F17C2223/0123 ,  F17C2223/036 ,  F17C2225/0123 ,  F17C2225/036 ,  F17C2227/0157 ,  F17C2227/042 ,  F17C2227/043 ,  F17C2227/047 ,  F17C2270/0168 ,  F17C2270/0176 ,  F17C2270/0178 ,  Y02E60/321

摘要： A method for dispensing compressed gas from two or more compressed gas storage volumes to receiving vessel such as vehicle fuel tanks. Control instructions are provided to cycle the compressed gas storage volumes through pressure cycles in a rolling rotating cascading manner such that each of the compressed gas storage volumes cycle from an upper pressure limit to a lower pressure limit.

摘要翻译： 一种将压缩气体从两个或更多个压缩气体储存容器分配到诸如车辆燃料箱的接收容器的方法。 提供控制指令以使压缩气体存储容积以滚动旋转级联方式的压力循环循环，使得每个压缩气体存储容积从上限压力循环到较低的压力极限。

公开(公告)号：US20110035475A1

公开(公告)日：2011-02-10

申请号：US12908613

申请日：2010-10-20

申请人： John D. RALSTON ,  Ravi Subramanian ,  Song Chen ,  Ted E. Williams

发明人： John D. RALSTON ,  Ravi Subramanian ,  Song Chen ,  Ted E. Williams

IPC分类号： G06F15/177

CPC分类号： H04B1/0003 ,  H04B1/40 ,  H04M1/72525 ,  H04M3/42178

摘要： An efficient software download to a configurable communication device is disclosed herein. The method of efficiently downloading software begins with a step of receiving a request to configure a communication device to run a communication application. The communication device being configured has a plurality of function blocks with a fixed portion of hardware and a flexible portion of hardware, wherein the same plurality of function blocks is capable of operating a plurality of communication applications. In a next step, the capability of the fixed portion and the flexible portion of hardware of the communication device is evaluated for a capability of implementing the communication application. Next, configuration information only for the flexible portion of hardware of the communication device is transmitted to the communication device to enable it to operate the communication application. An identification of the communication application is also transmitted to the communication device for purposes of tracking its implementation.

摘要翻译： 本文公开了向可配置通信设备的有效软件下载。 有效下载软件的方法从接收到配置通信设备以运行通信应用的请求的步骤开始。 配置的通信设备具有多个具有固定部分硬件和硬件的灵活部分的功能块，其中相同的多个功能块能够操作多个通信应用。 在下一步骤中，评估通信设备的固定部分和硬件的灵活部分的能力，以实现通信应用的能力。 接下来，仅将用于通信设备的硬件的灵活部分的配置信息发送到通信设备以使其能够操作通信应用。 通信应用的标识也被发送到通信设备，以便跟踪其实现。

公开(公告)号：US07499695B2

公开(公告)日：2009-03-03

申请号：US11317220

申请日：2005-12-22

申请人： Ravi Subramanian

发明人： Ravi Subramanian

IPC分类号： H04B1/16

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

摘要： 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.

摘要翻译： 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。

公开(公告)号：US20060133552A1

公开(公告)日：2006-06-22

申请号：US11317220

申请日：2005-12-22

申请人： Ravi Subramanian

发明人： Ravi Subramanian

IPC分类号： H04B1/10

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

摘要： 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.

公开(公告)号：US06807155B1

公开(公告)日：2004-10-19

申请号：US09565654

申请日：2000-05-05

申请人： Ravi Subramanian

发明人： Ravi Subramanian

IPC分类号： G08C1500

CPC分类号： H04W4/00 ,  H04W48/18

摘要： A method of profiling disparate communications and signal processing standards. The method begins with selection of a set of communications and signal processing standards for analysis. Next, functions performed by the set of communications and signal processing standards are identified and ranked according to computational intensity. A set of high computational intensity functions are then selected for implementation as kernels, the set of kernels forming a programmable processor that enables implementation of any one of the set of communications and signal processing standards.

摘要翻译： 分析不同通信和信号处理标准的方法。 该方法开始于选择一组通信和信号处理标准进行分析。 接下来，根据计算强度来识别和分级由该组通信和信号处理标准执行的功能。 然后选择一组高计算强度函数来实现为内核，该组内核形成可执行通信和信号处理标准中的任何一个的可编程处理器。

公开(公告)号：US06721581B1

公开(公告)日：2004-04-13

申请号：US09565687

申请日：2000-05-05

申请人： Ravi Subramanian

发明人： Ravi Subramanian

IPC分类号： H04M100

CPC分类号： H04B1/0003 ,  H04B1/005 ,  H04B1/406

摘要： A digital wireless communication device comprises a software-programmable processor, a heterogeneous reconfigurable multiprocessing logic circuit, and a bus connecting the software-programmable processor and the heterogeneous reconfigurable multiprocessing logic circuit. The heterogeneous reconfigurable multiprocessing logic circuit comprises a set of heterogeneous signal processing kernels and a reconfigurable data router interconnecting the heterogeneous signal processing kernels. The software-programmable processor is selected from the group comprising: a digital signal processor and a central processing unit. The architecture provides the ability to reconfigure a single product platform for multiple standards, applications, services, and quality-of service, instead of developing multiple hardware platforms to establish the same collective functionality. The architecture also provides the ability to use software programming techniques to reduce product development time and achieve rapid and comprehensive product customization. The invention extends the performance efficiency of microprocessors and digital signal processors via the augmentation of data paths and control paths through a reconfigurable co-processing machine. The reconfigurability of the data path optimizes the performance of the data flow in the algorithms implemented on the processor.

摘要翻译： 数字无线通信设备包括软件可编程处理器，异构可重新配置的多处理逻辑电路以及连接软件可编程处理器和异构可重构多处理逻辑电路的总线。 异构可重构多处理逻辑电路包括一组异构信号处理内核和互连异构信号处理内核的可重配置数据路由器。 软件可编程处理器从包括数字信号处理器和中央处理单元的组中选择。 该架构提供了为多个标准，应用程序，服务和服务质量重新配置单个产品平台的能力，而不是开发多个硬件平台来建立相同的集体功能。 该架构还提供使用软件编程技术来减少产品开发时间并实现快速和全面的产品定制的能力。 本发明通过可重构协同处理机的数据路径和控制路径的增加来扩展微处理器和数字信号处理器的性能效率。 数据路径的可重构性优化了在处理器上实现的算法中数据流的性能。

公开(公告)号：US5361276A

公开(公告)日：1994-11-01

申请号：US119682

申请日：1993-09-13

申请人： Ravi Subramanian

发明人： Ravi Subramanian

IPC分类号： H04L27/22 ,  H04B1/7117 ,  H04B1/712 ,  H04L27/30

CPC分类号： H04B1/712 ,  H04B1/7117

摘要： A spread spectrum receiver for use in spread spectrum communication systems is disclosed. The spread spectrum receiver of the present invention includes an analog-to-digital converter for receiving an analog spread spectrum signal, and for converting the received analog signal to a digital signal. The spread spectrum receiver also includes a digital frequency offset correction device, for modifying the digital signal in accordance with a frequency correction term signal to thereby correct for frequency offset in the received analog signal. The spread spectrum receiver also contains a Rake receiver. The spread spectrum receiver searches through the modified digital signal to identify M of the main and multipath return signals having the strongest signal strengths. The identified main and multipath return signals are processed in accordance with predetermined maximum likelihood techniques to thereby generate phase correction and maximal-ratio combining weighting factors for each of the M signals, as well as the overall frequency correction term signal.

摘要翻译： 公开了一种用于扩频通信系统中的扩频接收机。 本发明的扩频接收机包括用于接收模拟扩频信号的模数转换器，并将接收的模拟信号转换为数字信号。 扩频接收机还包括数字频偏校正装置，用于根据频率校正项信号修改数字信号，从而校正接收到的模拟信号中的频率偏移。 扩频接收机还包含Rake接收机。 扩频接收机通过修改的数字信号来搜索具有最强信号强度的主路径和多路径返回信号的M。 根据预定的最大似然技术来处理所识别的主路径和多路径返回信号，从而产生M个信号中的每一个以及整个频率校正项信号的相位校正和最大比组合加权因子。