公开(公告)号：US20130243136A1

公开(公告)日：2013-09-19

申请号：US13875127

申请日：2013-05-01

Applicant: BROADCOM CORPORATION

Inventor： Thomas KOLZE ,  Bruce Currivan ,  Niki Pantelias

IPC: H04L7/04

CPC classification number: H04L7/048 ,  H04J3/0638 ,  H04J3/0688 ,  H04L1/004

Abstract: A central entity and/or a remote device in a communication system are designed to address the problem of maintaining upstream synchronization in the remote device after loss of the downstream signal. One issue of particular importance is maintaining upstream transmissions from the remote device in an S-CDMA (or perhaps S-TDMA) mode that do not degrade performance of the communication system via poor upstream timing or a need for re-ranging. By providing novel functionality at the central entity for synchronizing first and second downstream signals and/or by providing novel functionality at the remote device for determining a symbol clock offset between a first terminated downstream signal and a second re-acquired downstream signal, embodiments of the present invention facilitate maintenance of synchronization through the loss of the downstream signal, thereby minimizing the need for re-ranging and avoiding poorly timed upstream bursts.

Abstract translation: 通信系统中的中央实体和/或远程设备被设计为解决在丢失下行信号之后维护远程设备中的上行同步的问题。 一个特别重要的问题是在S-CDMA（或可能的S-TDMA）模式中维护来自远程设备的上行传输，其不会通过差的上行时序或重新测距的需要来降低通信系统的性能。 通过在中央实体提供用于同步第一和第二下游信号的新颖功能和/或通过在远程设备处提供新颖的功能来确定第一终止的下行信号和第二重新获得的下行信号之间的符号时钟偏移， 本发明便于通过丢失下行信号来维持同步，从而最小化对重新测距的需要，并避免不良定时的上行脉冲串。

公开(公告)号：US20130314261A1

公开(公告)日：2013-11-28

申请号：US13867580

申请日：2013-04-22

Applicant: Broadcom Corporation

Inventor： Ramon GOMEZ ,  Loke TAN ,  Bruce CURRIVAN ,  Steven JAFFE ,  Thomas KOLZE ,  Lin HE

IPC: H03M1/06

CPC classification number: H03M1/06 ,  H03M1/00 ,  H03M1/0695 ,  H03M1/1061 ,  H03M1/12 ,  H03M1/1215

Abstract: A method and apparatus is disclosed to compensate for impairments within a data converter such that its output is a more accurate representation of its input. The data converter includes a main data converter, a reference data converter, and a correction module. The main data converter may be characterized as having the impairments. As a result, the output of the main data converter is not the most accurate representation of its input. The reference data converter is designed such that the impairments are not present. The correction module estimates the impairments present within the main data converter using its output and the reference data converter to generate corrections coefficients. The correction module adjusts the output of the main data converter using the corrections coefficients to improve the performance of the data converter.

Abstract translation: 公开了一种用于补偿数据转换器内的损伤的方法和装置，使得其输出是其输入的更准确的表示。 数据转换器包括主数据转换器，参考数据转换器和校正模块。 主数据转换器可以被表征为具有损伤。 因此，主数据转换器的输出不是其输入的最准确的表示。 参考数据转换器被设计成不存在损伤。 校正模块使用其输出和参考数据转换器来估计存在于主数据转换器内的损伤以产生校正系数。 校正模块使用校正系数调整主数据转换器的输出，以提高数据转换器的性能。

公开(公告)号：US20130279557A1

公开(公告)日：2013-10-24

申请号：US13845884

申请日：2013-03-18

Applicant: Broadcom Corporation

Inventor： Thomas KOLZE ,  Bruce J. Currivan

IPC: H04B1/10

CPC classification number: H04B1/1027 ,  H04L1/0056 ,  H04L25/03019 ,  H04L25/03038 ,  H04L25/03057 ,  H04L25/03286 ,  H04L2025/03414 ,  H04L2025/03496 ,  H04L2025/03617 ,  H04L2025/03636

Abstract: A communications receiver includes a noise analyzer to characterize the composition of the interference and/or distortion impressed onto a transmitted communications signal in the presence of one or more time-varying conditions. The noise analyzer may provide a selection signal indicating the composition of the interference and/or distortion impressed onto a transmitted communications signal in the presence of one or more time-varying conditions to be used by the communications receiver. In an exemplary embodiment, the communications receiver selects at least one set of filter coefficients to compensate for the interference and/or distortion impressed onto a transmitted communications signal in the presence of a particular time-varying interference and/or distortion condition. In another exemplary embodiment, the communications receiver selects a corresponding interference cancellation filter hank to compensate for the interference and/or distortion impressed onto a transmitted communications signal in the presence of the particular time-varying interference and/or distortion condition.

Abstract translation: 通信接收机包括噪声分析器，用于在存在一个或多个时变条件的情况下表征在所发送的通信信号上施加的干扰和/或失真的组成。 在由通信接收机使用的一个或多个时变条件的情况下，噪声分析器可以提供指示在所发送的通信信号上施加的干扰和/或失真的组成的选择信号。 在示例性实施例中，通信接收器在存在特定的时变干扰和/或失真条件的情况下，选择至少一组滤波器系数来补偿所发射的通信信号上的干扰和/或失真。 在另一个示例性实施例中，通信接收机选择相应的干扰消除滤波器汉克，以在存在特定的时变干扰和/或失真条件的情况下补偿在所发送的通信信号上的干扰和/或失真。