公开(公告)号：US20080069193A1

公开(公告)日：2008-03-20

申请号：US11901346

申请日：2007-09-15

申请人： Avadhani Shridhar ,  Sam Heidari ,  Rouben Toumani ,  Ying Wu

发明人： Avadhani Shridhar ,  Sam Heidari ,  Rouben Toumani ,  Ying Wu

IPC分类号： H04B1/38

CPC分类号： H04L5/006 ,  H04L5/0042 ,  H04L5/0046

摘要： A multi-tone transceiver including: a channel controller and a plurality of components forming a transmit path and a receive path. The channel controller configured to determine bit-loading for each successive symbol or tone set based on a 1st noise margin target for a first subset of tones in each tone set dedicated to transport of a robust communications channel (RCC) and based on a 2nd noise margin target less than the 1st noise margin target for remaining tones in each tone set dedicated to a standard communications channel (SCC). The plurality of components forming the transmit and receive paths are responsive to the channel controller to select for data modulated on a given tone at least one of smaller constellations and higher gain scaling levels when the given tone corresponds to an RCC tone as compared to an SCC tone, whereby the first set of tones dedicated to the RCC exhibit greater immunity to noise variations than the remaining tones dedicated to the SCC.

摘要翻译： 一种多音调收发器，包括：信道控制器和形成发送路径和接收路径的多个组件。 信道控制器，被配置为基于专用于传输鲁棒通信信道的每个音调集合中的第一音调子集，确定每个连续符号或音调集合的比特加载（...） RCC），并且基于小于专用于标准通信信道（SCC）的每个音调集合中的剩余音调的小于噪声余量目标的2 nd nd噪声容限目标。 形成发送和接收路径的多个组件响应于信道控制器，以便在给定音调对应于RCC音调与SCC相比时，为给定音调调制的数据中的至少一个较小星座和较高增益缩放级别 音调，由此专用于RCC的第一组音调比专用于SCC的剩余音调具有更大的对噪声变化的抗扰度。

公开(公告)号：US07881362B2

公开(公告)日：2011-02-01

申请号：US11901346

申请日：2007-09-15

申请人： Avadhani Shridhar ,  Sam Heidari ,  Rouben Toumani ,  Ying Wu

发明人： Avadhani Shridhar ,  Sam Heidari ,  Rouben Toumani ,  Ying Wu

IPC分类号： H04B1/38

CPC分类号： H04L5/006 ,  H04L5/0042 ,  H04L5/0046

摘要： A multi-tone transceiver including: a channel controller and a plurality of components forming a transmit path and a receive path. The channel controller configured to determine bit-loading for each successive symbol or tone set based on a 1st noise margin target for a first subset of tones in each tone set dedicated to transport of a robust communications channel (RCC) and based on a 2nd noise margin target less than the 1st noise margin target for remaining tones in each tone set dedicated to a standard communications channel (SCC). The plurality of components forming the transmit and receive paths are responsive to the channel controller to select for data modulated on a given tone at least one of smaller constellations and higher gain scaling levels when the given tone corresponds to an RCC tone as compared to an SCC tone, whereby the first set of tones dedicated to the RCC exhibit greater immunity to noise variations than the remaining tones dedicated to the SCC.

摘要翻译： 一种多音调收发器，包括：信道控制器和形成发送路径和接收路径的多个组件。 所述信道控制器被配置为基于专用于传输鲁棒通信信道（RCC）的每个音调集合中的第一音调子集的第一噪声容限目标以及基于第二噪声来确定每个连续符号或音调集合的比特加载 余量目标小于专用于标准通信信道（SCC）的每个音调集合中的剩余音调的第一噪声容限度目标。 形成发送和接收路径的多个组件响应于信道控制器，以便在给定音调对应于RCC音调与SCC相比时，为给定音调调制的数据中的至少一个较小星座和较高增益缩放级别 音调，由此专用于RCC的第一组音调比专用于SCC的剩余音调具有更大的对噪声变化的抗扰度。

公开(公告)号：US07359444B1

公开(公告)日：2008-04-15

申请号：US11081419

申请日：2005-03-15

申请人： Rouben Toumani ,  Sam Heidari

发明人： Rouben Toumani ,  Sam Heidari

IPC分类号： H04L27/28

CPC分类号： H04L5/14 ,  H04L27/2601

摘要： An inverse discrete Fourier transform (IDFT) processor processing a lower frequency image of a selected transmit band along with base images of remaining transmit bands called for in a corresponding X-DSL standard. A hybrid upconverter processing the IDFT output by generating a higher frequency replication of the imaged transmit band falling in the standards based frequency range along with the base band images of remaining transmit bands and selectively passing onto the communication medium only images or replications called for by the standards. A hybrid downconverter processing at least one of the received bands at sampling rates below Nyquist thereby creating a lower frequency image within the range of a discrete Fourier transform (DFT) processor. The hybrid downconverter clears the frequency band in which the image processed at sub-Nyquist rates will fold. The DFT then transforms only the images or replications falling within its frequency range.

公开(公告)号：US07443918B1

公开(公告)日：2008-10-28

申请号：US11980832

申请日：2007-10-30

申请人： Rouben Toumani ,  Sam Heidari

发明人： Rouben Toumani ,  Sam Heidari

IPC分类号： H04K1/10

CPC分类号： H04L5/14 ,  H04L27/2601

摘要： An inverse discrete Fourier transform (IDFT) processor processing a lower frequency image of a selected transmit band along with base images of remaining transmit bands called for in a corresponding X-DSL standard. A hybrid upconverter processing the IDFT output by generating a higher frequency replication of the imaged transmit band falling in the standards based frequency range along with the base band images of remaining transmit bands and selectively passing onto the communication medium only images or replications called for by the standards. A hybrid downconverter processing at least one of the received bands at sampling rates below Nyquist thereby creating a lower frequency image within the range of a discrete Fourier transform (DFT) processor. The hybrid downconverter clears the frequency band in which the image processed at sub-Nyquist rates will fold. The DFT then transforms only the images or replications falling within its frequency range.

摘要翻译： 逆离散傅里叶变换（IDFT）处理器处理所选发射频带的较低频率图像以及在相应的X-DSL标准中所要求的剩余发射频带的基本图像。 混合上变频器通过产生落在基于标准的频率范围内的成像发射频带的较高频率复制以及剩余发射频带的基带图像来处理IDFT输出，并且仅选择性地传递到通信介质上仅图像或由 标准。 混合下变频器以低于奈奎斯特采样速率处理接收频带中的至少一个，从而在离散付里叶变换（DFT）处理器的范围内产生较低频率图像。 混合下变频器清除以奈奎斯特速率处理的图像将折叠的频带。 DFT然后仅转换落在其频率范围内的图像或复制。

公开(公告)号：US07315571B1

公开(公告)日：2008-01-01

申请号：US09837914

申请日：2001-04-18

申请人： Sam Heidari ,  Behrooz Rezvani ,  Raminder S. Bajwa ,  Jacky Chow ,  Avadhani Shridhar ,  Dale Smith ,  John Gevargiz ,  Saman Behtash

发明人： Sam Heidari ,  Behrooz Rezvani ,  Raminder S. Bajwa ,  Jacky Chow ,  Avadhani Shridhar ,  Dale Smith ,  John Gevargiz ,  Saman Behtash

IPC分类号： H04B1/38

CPC分类号： H04L27/2628 ,  H04L5/0042 ,  H04L5/0044 ,  H04L5/0064 ,  H04L27/0002 ,  H04L27/265 ,  H04M11/062

摘要： A transceiver for communicating a multi-tone modulated communication channel on a subscriber line. The transceiver includes: a digital signal processor (DSP) with a Fourier transform module and an analog front end (AFE). The DSP determines an available range of frequencies on the subscriber line and expands or contracts the tone spacing of each of a fixed number “N” of tones accordingly by decreasing or increasing the processing interval associated with the Fourier transform of each tone set. The AFE performs digital-to-analog conversion of the multi-tone modulated communication channel at rates compatible with the processing interval of the Fourier transform module; whereby the range of frequencies spanned by the modulated tones on the subscriber line conforms to the available of frequencies on the subscriber line.

摘要翻译： 用于在用户线路上传送多音调调制通信信道的收发器。 收发器包括：具有傅立叶变换模块和模拟前端（AFE）的数字信号处理器（DSP）。 DSP确定用户线路上的可用频率范围，并通过减少或增加与每个音调集合的傅里叶变换相关联的处理间隔来相应地扩展或收缩固定数量“N”个音调中的每一个的音调间隔。 AFE以与傅里叶变换模块的处理间隔兼容的速率执行多音调调制通信信道的数模转换; 由此用户线路上的调制音调跨越的频率范围符合用户线上的可用频率。

公开(公告)号：US06940807B1

公开(公告)日：2005-09-06

申请号：US09699193

申请日：2000-10-26

申请人： Behrooz Rezvani ,  Avadhani Shridhar ,  Raminder S. Bajwa ,  Tiruvur R. Ramesh ,  Masoud Eskandari ,  Firooz Massoudi ,  Sam Heidari ,  Omprakash S. Sarmaru ,  Sridhar Begur

发明人： Behrooz Rezvani ,  Avadhani Shridhar ,  Raminder S. Bajwa ,  Tiruvur R. Ramesh ,  Masoud Eskandari ,  Firooz Massoudi ,  Sam Heidari ,  Omprakash S. Sarmaru ,  Sridhar Begur

IPC分类号： H04J11/00

CPC分类号： G06F17/142 ,  H04L27/2628 ,  H04L27/265

摘要： The current invention provides a DSP which accommodates multiple current X-DSL protocols and is further configurable to support future protocols. The DSP is implemented with shared and dedicated hardware components on both the transmit and receive paths. The DSP implements both the discrete Fourier transform (DFT) and inverse discrete Fourier transform (IDFT) portions across a wide range of sample sizes and X-DSL protocols. Multiple channels, each with varying ones of the X-DSL protocols can be handled in the same session. The DSP offers the speed associated with hardware implementation of the transforms and the flexibility of a software only implementation. Traffic flow is regulated in the chip using a packet based schema in which each packet is associated with a specific channel of upstream and downstream data. Header and control information in each packet is used to govern the processing of each packet as it moves along either the transmit path or receive path. The DSP of the current invention may advantageously be utilized in fields other than communications, such as: medical and other imaging, seismic analysis, radar and other military applications, pattern recognition, signal processing etc. The present invention provides a signal processing architecture that supports scalability of CO/DLC/ONU resources, and allows a significantly more flexible hardware response to the evolving X-DSL standards without over committing of hardware resources. As standards evolve hardware may be reconfigured to support the new standards.

摘要翻译： 本发明提供一种DSP，其容纳多个当前的X-DSL协议，并且可进一步配置以支持未来的协议。 DSP在传输和接收路径上都具有共享和专用硬件组件。 DSP在宽范围的采样大小和X-DSL协议上实现离散傅立叶变换（DFT）和离散傅立叶逆变换（IDFT）部分。 每个具有不同的X-DSL协议的多个信道可以在同一个会话中处理。 DSP提供与转换的硬件实现相关的速度和仅用于软件的实现的灵活性。 使用基于分组的模式在芯片中调整流量流，其中每个分组与上游和下游数据的特定信道相关联。 每个数据包中的报头和控制信息用于控制每个数据包沿着发送路径或接收路径移动时的处理。 本发明的DSP可有利地用于通信以外的领域，例如：医疗和其他成像，地震分析，雷达和其他军事应用，模式识别，信号处理等。本发明提供一种信号处理架构，其支持 CO / DLC / ONU资源的可扩展性，并且允许对演进的X-DSL标准的显着更灵活的硬件响应，而不必超过硬件资源。 随着标准的发展，硬件可能被重新配置以支持新的标准。

公开(公告)号：US20100002755A1

公开(公告)日：2010-01-07

申请号：US12459129

申请日：2009-06-25

申请人： Sam Heidari ,  Sivannarayana Nagireddi ,  Sigurd Schelstraete ,  Avadhani Shridhar

发明人： Sam Heidari ,  Sivannarayana Nagireddi ,  Sigurd Schelstraete ,  Avadhani Shridhar

IPC分类号： H04B1/38

CPC分类号： H04B3/542 ,  H04B2203/5408 ,  H04B2203/5445 ,  H04B2203/5454 ,  H04L5/0037 ,  H04L5/0064 ,  H04L5/0092 ,  H04L5/1438

摘要： A multi-tone modem with shared and discrete components forming a transmit path and a receive path configured to couple to a wired communication medium to communicate at least one multi-tone modulated communication channel thereon. The modem includes a multi-tone modulator component and a configurable frequency up converter component. The multi-tone modulator component is configured for multi-tone modulation and demodulation of a transmitted and received communication channel at a base band frequency range. The configurable frequency up converter component is coupled to the multi-tone modulator to selectably up convert the frequency range of the transmitted base band signal from the multi-tone modulator to that of a selected communication band and down convert received signals from the selected communication band to the base band for demodulation by the multi-tone modulator.

摘要翻译： 具有形成发送路径的共享和分立组件的多音调制解调器和被配置为耦合到有线通信介质以在其上通信至少一个多音调调制通信信道的接收路径。 调制解调器包括多音调制器组件和可配置的升频转换器组件。 多音调制器部件被配置为在基带频率范围内对发送和接收的通信信道进行多音调制和解调。 可配置的上变频器组件耦合到多音调制器以可选择地将来自多音调制器的发射基带信号的频率范围转换成所选择的通信频带的频率范围，并且将来自所选择的通信频带的接收信号 到基带以进行多音调制器的解调。

公开(公告)号：US20090049347A1

公开(公告)日：2009-02-19

申请号：US12228972

申请日：2008-08-18

申请人： Avadhani Shridhar ,  Sam Heidari

发明人： Avadhani Shridhar ,  Sam Heidari

IPC分类号： G06F11/00

CPC分类号： H04L5/1446 ,  H04L1/0003 ,  H04L1/0059 ,  H04L1/203 ,  H04L1/206 ,  H04L5/1469 ,  H04L27/2647 ,  H04L27/2689

摘要： A transceiver with a plurality of components coupled to one another to form a transmit path and a receive path for multi-tone modulation of user data across a communication medium. The transceiver includes a framer and a deframer. The framer is configured to momentarily suspend framing of user data before processing bits associated with tones targeted for reference data transport and injects the pre-agreed reference pattern therein, after which framing of user data resumes. The deframer is configured to momentarily suspend deframing of received user data bits before processing bits associated with tones targeted for transport of pre-agreed reference data and extracts the received reference bits thereof for comparison with the corresponding pre-agreed reference bits to determine errors therein, after which deframing of user data resumes.

摘要翻译： 具有多个组件的收发器，彼此耦合以形成用于通过通信介质的用户数据的多音调制的发送路径和接收路径。 收发器包括一个成帧器和一个deframer。 成帧器被配置为在处理与针对参考数据传输的音调相关联的位之前暂时停止用户数据的成帧，并在其中注入预先约定的参考模式，之后恢复用户数据的构图。 解帧器被配置为在处理与预先约定的参考数据的传输的目标的音调相关联的位之前暂时停止所接收的用户数据位的解帧，并提取其接收到的参考比特以与对应的预先约定的参考比特进行比较以确定其中的错误， 之后恢复用户数据的清除。

公开(公告)号：US06937616B1

公开(公告)日：2005-08-30

申请号：US09620779

申请日：2000-07-21

申请人： Behrooz Rezvani ,  Sam Heidari ,  Avadhani Shridhar ,  Omprakash S. Samaru ,  Firooz Massoudi

发明人： Behrooz Rezvani ,  Sam Heidari ,  Avadhani Shridhar ,  Omprakash S. Samaru ,  Firooz Massoudi

IPC分类号： H04J3/22 ,  H04L12/28 ,  H04M11/06

CPC分类号： H04L12/2883 ,  H04L12/2856 ,  H04M11/062

摘要： A method and apparatus for digital subscriber line (xDSL) communications between one or more digital signal processors (DSPs) and analog front ends (AFEs) each coupled to corresponding subscriber line(s). The apparatus transports channels of data between subscribers and the DSP(s). The apparatus includes a bus for the transport of digital data, a DSP AFE interfaces. The DSP interfaces couples the DSP to the bus. The DSP interface accepts downstream channels of digital data from the DSP and transmits packets each associated with a corresponding one of the downstream channels to the bus. Each of the packets identifies a targeted AFEs coupled to a selected one of the subscriber lines. The AFE interfaces each couple an associated one of the AFEs to the bus. Each of the AFE interfaces transmits selected packets to a selected one of the subscriber lines for the transport to the subscriber.

摘要翻译： 一种用于一个或多个数字信号处理器（DSP）和模拟前端（AFE）之间的数字用户线（xDSL）通信的方法和装置，每个耦合到对应的用户线路。 该设备在订户和DSP之间传输数据信道。 该装置包括用于传输数字数据的总线，DSP AFE接口。 DSP接口将DSP耦合到总线。 DSP接口接收来自DSP的数字数据的下行信道，并且将与相应的一个下行信道相关联的分组发送到总线。 每个分组识别耦合到所选择的一个用户线路的目标AFE。 AFE接口将每个AFE接口中的一个耦合到总线。 每个AFE接口将所选择的分组传送到所选择的一个用户线，以便传输给用户。

公开(公告)号：US08223859B2

公开(公告)日：2012-07-17

申请号：US12459129

申请日：2009-06-25

申请人： Sam Heidari ,  Sivannarayana Nagireddi ,  Sigurd Schelstraete ,  Avadhani Shridhar

发明人： Sam Heidari ,  Sivannarayana Nagireddi ,  Sigurd Schelstraete ,  Avadhani Shridhar

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04B3/542 ,  H04B2203/5408 ,  H04B2203/5445 ,  H04B2203/5454 ,  H04L5/0037 ,  H04L5/0064 ,  H04L5/0092 ,  H04L5/1438

摘要： A multi-tone modem with shared and discrete components forming a transmit path and a receive path configured to couple to a wired communication medium to communicate at least one multi-tone modulated communication channel thereon. The modem includes a multi-tone modulator component and a configurable frequency up converter component. The multi-tone modulator component is configured for multi-tone modulation and demodulation of a transmitted and received communication channel at a base band frequency range. The configurable frequency up converter component is coupled to the multi-tone modulator to selectably up convert the frequency range of the transmitted base band signal from the multi-tone modulator to that of a selected communication band and down convert received signals from the selected communication band to the base band for demodulation by the multi-tone modulator.

摘要翻译： 具有形成发送路径的共享和分立组件的多音调制解调器和被配置为耦合到有线通信介质以在其上通信至少一个多音调调制通信信道的接收路径。 调制解调器包括多音调制器组件和可配置的升频转换器组件。 多音调制器部件被配置为在基带频率范围内对发送和接收的通信信道进行多音调制和解调。 可配置的上变频器组件耦合到多音调制器以可选择地将来自多音调制器的发射基带信号的频率范围转换成所选择的通信频带的频率范围，并且将来自所选择的通信频带的接收信号 到基带以进行多音调制器的解调。