SYSTEMS AND METHODS FOR PERFORMING SISO DETECTION IN A WiMAX ENVIRONMENT
    101.
    发明申请
    SYSTEMS AND METHODS FOR PERFORMING SISO DETECTION IN A WiMAX ENVIRONMENT 有权
    用于在WiMAX环境中执行SISO检测的系统和方法

    公开(公告)号:US20100002808A1

    公开(公告)日:2010-01-07

    申请号:US12168480

    申请日:2008-07-07

    IPC分类号: H04L27/06 H04B1/10

    CPC分类号: H04L25/067 H04L25/03305

    摘要: In accordance with some embodiments, a communication system is described that comprises a soft-output detector configured to receive a transmit signal and output reliability information regarding the received signal. In accordance with such embodiments, the detector comprises a symbol combiner configured to operate in both a repetition mode and a non-repetition mode, wherein repetition mode comprises receiving a plurality of signals for the transmit signal.

    摘要翻译: 根据一些实施例,描述了一种通信系统,其包括被配置为接收发射信号并输出​​关于接收信号的可靠性信息的软输出检测器。 根据这样的实施例,检测器包括被配置为在重复模式和非重复模式中操作的符号组合器,其中重复模式包括接收用于发射信号的多个信号。

    SYSTEMS AND METHODS FOR CHARACTERIZING LOOPS BASED ON SINGLE-ENDED LINE TESTING (SELT)
    102.
    发明申请
    SYSTEMS AND METHODS FOR CHARACTERIZING LOOPS BASED ON SINGLE-ENDED LINE TESTING (SELT) 有权
    基于单端测试(SELT)表征睡眠的系统和方法

    公开(公告)号:US20090323902A1

    公开(公告)日:2009-12-31

    申请号:US12164488

    申请日:2008-06-30

    IPC分类号: H04M3/08

    CPC分类号: H04M3/306 H04B3/46

    摘要: Systems and methods for characterizing loops based on single-ended line test (SELT) are described. One embodiment includes a method for determining whether a straight-loop departure condition exists on a loop under test. In accordance with such embodiments, the method comprises receiving an un-calibrated echo signal for the loop under test using frequency domain reflectometry single-ended line testing (FDR-SELT), a region associated with the loop under test, a platform type, and a length of the loop under test. Based on the region, platform type, and loop length, the method further comprises determining whether the loop is not a straight loop, wherein determining whether the loop is not a straight loop comprises determining whether at least one differentiating feature is present in the un-calibrated echo signal. Another embodiment includes a method for determining a loop gauge for a loop under test. The method comprises receiving an un-calibrated echo signal for the loop under test using frequency domain reflectometry single-ended line testing (FDR-SELT), a region associated with the loop under test, a platform type, and a length of the loop under test. Based on the region, platform type, and loop length, the method further comprises analyzing characteristics relating to local maxima and local minima of the un-calibrated echo signal to determine the loop gauge.

    摘要翻译: 描述了基于单端线测试(SELT)来表征环路的系统和方法。 一个实施例包括一种用于确定在测试环路上是否存在直线出发条件的方法。 根据这样的实施例,该方法包括使用频域反射测试单端线测试(FDR-SELT),与被测环路相关的区域,平台类型和 被测环路的长度。 基于区域,平台类型和循环长度,该方法还包括确定循环是否不是直循环,其中确定循环是否不是直循环包括确定在非循环中是否存在至少一个微分特征, 校准回波信号。 另一个实施例包括用于确定被测环路的环路规的方法。 该方法包括使用频域反射测试单端线测试(FDR-SELT),与测试环路相关的区域,平台类型和环路长度来接收待测环路的未校准回波信号 测试。 基于该区域,平台类型和环路长度,该方法还包括分析与未校准的回波信号的局部最大值和局部最小值相关的特性,以确定回路规。

    Hierarchical trellis coded modulation
    103.
    发明授权
    Hierarchical trellis coded modulation 有权
    分级网格编码调制

    公开(公告)号:US07613985B2

    公开(公告)日:2009-11-03

    申请号:US10970718

    申请日:2004-10-22

    IPC分类号: H03M13/00

    摘要: A system and method for encoding information is disclosed. In one embodiment, information is encoded using a high protection code for the least significant bit and a low protection code for the next three most significant bits. The remaining bits are uncoded. The high protection code may be a turbo code and the low protection code may be a trellis coded modulation code. In this embodiment, the collection of bits is then mapped according to a diagonally shifted QAM constellation technique.

    摘要翻译: 公开了一种用于编码信息的系统和方法。 在一个实施例中,使用用于最低有效位的高保护码和下一个三个最高有效位的低保护码对信息进行编码。 其余位未编码。 高保护码可以是turbo码,低保护码可以是网格编码调制码。 在该实施例中,然后根据对角位移的QAM星座图技术来映射位的采集。

    System and Method for Selectable Mask for LDSL
    104.
    发明申请
    System and Method for Selectable Mask for LDSL 失效
    LDSL可选掩码的系统和方法

    公开(公告)号:US20090219979A1

    公开(公告)日:2009-09-03

    申请号:US12392039

    申请日:2009-02-24

    IPC分类号: H04B1/38

    摘要: The present invention overcomes various problems by defining two upstream masks (U1, U2) and two downstream masks (D1, D2) and using a mask selectable system for the long reach digital subscriber line (LDSL), in which a unique modem feature is activated during handshake to automatically check for physical layer status in terms of spectral compatibility and, thus, automatically optimize the boosted mode with the use of the mask selectable system choose the best combination of upstream/downstream masks in any physical layer noise scenario.

    摘要翻译: 本发明通过定义两个上游掩码(U1,U2)和两个下行掩码(D1,D2)并使用用于长距离数字用户线(LDSL)的掩码可选择系统来克服各种问题,其中唯一的调制解调器特征被激活 在握手期间,根据频谱兼容性自动检查物理层状态,因此,使用掩码可选择系统自动优化升压模式,在任何物理层噪声场景中选择上游/下游掩码的最佳组合。

    System and method for selectable mask for LDSL
    105.
    发明授权
    System and method for selectable mask for LDSL 有权
    LDSL可选掩码的系统和方法

    公开(公告)号:US07496135B2

    公开(公告)日:2009-02-24

    申请号:US11849618

    申请日:2007-09-04

    IPC分类号: H04B1/38

    摘要: The present invention overcomes various problems by defining two upstream masks (U1, U2) and two downstream masks (D1, D2) and using a mask selectable system for the long reach digital subscriber line (LDSL), in which a unique modem feature is activated during handshake to automatically check for physical layer status in terms of spectral compatibility and, thus, automatically optimize the boosted mode with the use of the mask selectable system choose the best combination of upstream/downstream masks in any physical layer noise scenario.

    摘要翻译: 本发明通过定义两个上游掩码(U1,U2)和两个下行掩码(D1,D2)并使用用于长距离数字用户线(LDSL)的掩码可选择系统来克服各种问题,其中唯一的调制解调器特征被激活 在握手期间,根据频谱兼容性自动检查物理层状态,因此,使用掩码可选择系统自动优化升压模式,在任何物理层噪声场景中选择上游/下游掩码的最佳组合。

    Fractional local peak detection and mitigation for PAR reduction
    106.
    发明授权
    Fractional local peak detection and mitigation for PAR reduction 有权
    PAR减少的分数局部峰值检测和减轻

    公开(公告)号:US07397860B1

    公开(公告)日:2008-07-08

    申请号:US10263506

    申请日:2002-10-04

    IPC分类号: H04L27/28

    CPC分类号: H04L27/2624

    摘要: A method and system for reducing the power to average ratio (PAR) at the transmitter and after the up sampling and interpolation filter. In the time domain, Fractional Local Peak Detection and Mitigation (FLPDM) locally (i.e. in the neighborhood where the high peak occur) detects the high peaks at a sampling rate of T/K and combines an optimal binary and a PAR-lowering sequence at the scale of one extended symbol for multi-carrier modulation and at the scale M of symbols for single-carrier modulation. Since the technique acts locally, FLPDM does not require peaks search and processing at the scale of many time samples, does not require iterative Fast Fourier Transform (FFT) and Inverse Fast Fourier Transform (IFFT) processing and it assures tunable millions of instruction per second (MIPS) performance.

    摘要翻译: 一种用于降低发射机和上采样和插值滤波后的功率平均比(PAR)的方法和系统。 在时域中,局部(即在发生高峰的附近)的分数局部峰值检测和缓解(FLPDM)以T / K的采样速率检测高峰,并将最佳二进制和PAR降低序列组合在 用于多载波调制的一个扩展符号的尺度和用于单载波调制的符号的尺度M. 由于该技术在本地进行操作,因此FLPDM不需要在多个时间样本的标度进行峰值搜索和处理,不需要迭代快速傅里叶变换(FFT)和快速傅里叶逆变换(IFFT)处理,并且它保证每秒可调谐数百万条指令 (MIPS)性能。

    System and method for selectable mask for LDSL
    107.
    发明授权
    System and method for selectable mask for LDSL 有权
    LDSL可选掩码的系统和方法

    公开(公告)号:US07272172B2

    公开(公告)日:2007-09-18

    申请号:US10714907

    申请日:2003-11-18

    IPC分类号: H04B1/38

    摘要: The present invention overcomes various problems by defining two upstream masks (U1, U2) and two downstream masks (D1, D2) and using a mask selectable system for the long reach digital subscriber line (LDSL), in which a unique modem feature is activated during handshake to automatically check for physical layer status in terms of spectral compatibility and, thus, automatically optimize the boosted mode with the use of the mask selectable system choose the best combination of upstream/downstream masks in any physical layer noise scenario.

    摘要翻译: 本发明通过定义两个上行掩码(U 1,U 2)和两个下行掩码(D 1,D 2)并使用用于长距离数字用户线(LDSL)的掩码可选择系统来克服各种问题,其中唯一 调制解调器功能在握手期间被激活,以便在频谱兼容性方面自动检查物理层状态,因此使用掩模可选择系统自动优化升压模式,在任何物理层噪声场景中选择上游/下游屏蔽的最佳组合 。

    Systems and methods for multistage signal detection in mimo transmissions and iterative detection of precoded OFDM
    108.
    发明授权
    Systems and methods for multistage signal detection in mimo transmissions and iterative detection of precoded OFDM 有权
    用于mimo传输中多级信号检测的系统和方法以及预编码OFDM的迭代检测

    公开(公告)号:US07216267B2

    公开(公告)日:2007-05-08

    申请号:US11224328

    申请日:2005-09-13

    IPC分类号: H04L1/20

    摘要: Systems and methods for multi-stage signal detection in MIMO transmission including Bernoulli-Gaussian detection are provided. A multistage iterative signal decoder is provided that exploits the property that in a relatively simply decoding scheme such as mean square error (MSE) or zero-forcing (ZF) only a small portion of the total symbols are mis-detected. Therefore, an optimality test is performed on the output of a relatively low complexity decoder unit. If the symbol passes the optimality test, it is presumed to be correctly decoded. Otherwise, the symbol is sent for further processing to a relatively higher complexity decoding unit such as a sphere decoder. In this way, processing efficiency is increased, because only those symbols requiring additional processing are processed by the high complexity processing unit.

    摘要翻译: 提供了包括伯努利 - 高斯检测在内的MIMO传输中多级信号检测的系统和方法。 提供了一种多级迭代信号解码器,其利用了在相对简单的解码方案(诸如均方误差(MSE)或迫零(ZF))中只有小部分总符号被错误检测的特性。 因此,对相对较低复杂度的解码器单元的输出执行最佳性测试。 如果符号通过最优性测试,则假设它被正确解码。 否则,该符号被发送用于进一步处理到比较高复杂性的解码单元,例如球体解码器。 以这种方式,由于只有那些需要附加处理的符号才被高复杂性处理单元处理,所以提高了处理效率。

    System and method for decreasing cross-talk effects in time-domain-modulation (TDM) digital subscriber line (DSL) systems
    109.
    发明授权
    System and method for decreasing cross-talk effects in time-domain-modulation (TDM) digital subscriber line (DSL) systems 有权
    用于减少时域调制(TDM)数字用户线(DSL)系统中的串扰效应的系统和方法

    公开(公告)号:US07142595B1

    公开(公告)日:2006-11-28

    申请号:US10120941

    申请日:2002-04-10

    IPC分类号: H03K5/159

    CPC分类号: H04L25/03885 H04M3/34

    摘要: A communications system may be characterized by a system error variance because the error variance provides an indication of signal corruption in the system. By strategically adding a secondary sensor to the communications system, system characteristics may be altered so that the system error variance is reduced. A system and method are presented, wherein a secondary sensor is configured to receive a disturbance effect and produce a filtered slave signal as a function of the disturbance effect. The filtered slave signal is configured to alter the characteristics of the communications system and thereby reduce system error variance.

    摘要翻译: 通信系统可以由系统误差变化来表征,因为误差方差提供了系统中信号损坏的指示。 通过向通信系统策略性地添加二次传感器,可以改变系统特性,从而降低系统误差方差。 提出了一种系统和方法,其中辅助传感器被配置为接收干扰效应并产生作为干扰效应的函数的滤波后的从属信号。 被滤波的从机信号被配置为改变通信系统的特性,从而减少系统误差变化。

    Method and system for virtual exchange reference impact (VERI) for use in mixed spectrum management in DSL
    110.
    发明申请
    Method and system for virtual exchange reference impact (VERI) for use in mixed spectrum management in DSL 有权
    用于DSL中混合频谱管理的虚拟交换参考影响的方法和系统(VERI)

    公开(公告)号:US20060126707A1

    公开(公告)日:2006-06-15

    申请号:US11009710

    申请日:2004-12-13

    IPC分类号: H04L5/16

    CPC分类号: H04B3/32 H04B3/487

    摘要: A method and apparatus implements a Virtual Exchange Reference Impact (VERI) technique to define a pattern to shape the spectrum of a cabinet deployed system to minimize its impact, e.g., FEXT, into an exchange deployed system while achieving effective cabinet system performance, e.g., in terms of data transmission rate. The invention shapes the cabinet system to replicate a self-impact of the exchange system on itself based on the known distance of the cabinet from the exchange. The shaping is required when both exchange and cabinet systems share the same bundle and exhibit overlapped bandwidths. A particular example consists of VDSL deployed from remote cabinet impacting ADSL2/ADSL2+ deployed from the exchange.

    摘要翻译: 一种方法和装置实现了虚拟交换参考影响(VERI)技术,以定义一种模式来形成柜部署系统的频谱,以将其影响(例如FEXT)最小化到交换部署系统中,同时实现有效的机柜系统性能, 在数据传输率方面。 本发明根据柜与交换机的已知距离对橱柜系统进行整形以将交换系统的自身影响复制到其自身上。 交换和机柜系统共享相同的捆绑包并展示重叠的带宽时,需要进行整形。 一个特定的例子包括从远程机柜部署的VDSL,影响从交换机部署的ADSL2 / ADSL2 +。