公开(公告)号：US09264924B2

公开(公告)日：2016-02-16

申请号：US13931841

申请日：2013-06-29

Applicant: Cable Television Laboratories, Inc.

Inventor： Thomas H. Williams

IPC: H04W24/06

CPC classification number: H04W24/06 ,  H04L5/0048 ,  H04L25/022 ,  H04L25/0232 ,  H04L27/2647 ,  H04L27/2657

Abstract: Estimation of noise within signaling is contemplated. The noise estimation may be beneficial in detecting noise within signaling in order to facilitate error correction or other corrective measures without having to process transmitted data being transmitted within the signaling. The noise estimation may be based on pilot tones included within frequency division multiplexed signaling.

Abstract translation: 考虑了信令内的噪声估计。 噪声估计可以有益于检测信令内的噪声，以便促进纠错或其他纠正措施，而不必处理在信令内传输的传输数据。 噪声估计可以基于包括在频分复用信令内的导频音。

公开(公告)号：US20150043624A1

公开(公告)日：2015-02-12

申请号：US14184619

申请日：2014-02-19

Applicant: Cable Television Laboratories, Inc.

Inventor： Thomas H. Williams ,  Belal Hamzeh

IPC: H04B3/46 ,  H04W24/08

CPC classification number: H04B3/46 ,  H04W24/08

Abstract: A method to test a signal path with vacant bandwidth by sending a test signal twice and processing two resulting nonlinear distortion signals captured in the vacant bands to determine presence of nonlinear distortion. If the signals correlate, the energy in the vacant bands is nonlinear distortion. If the test signal is sent followed by an inverse (in time-domain) of itself, and a resulting correlation peak is negative, the nonlinear distortion is determined to have been created by odd-order nonlinear distortion.

Abstract translation: 通过发送测试信号两次来测试具有空闲带宽的信号路径的方法，并处理在空闲频带中捕获的两个产生的非线性失真信号，以确定非线性失真的存在。 如果信号相关，则空位带中的能量是非线性失真。 如果发送测试信号后跟本身的反向（在时域中），并且所得到的相关峰值为负，则非线性失真被确定为由奇次非线性失真产生。