公开(公告)号：US20200035892A1

公开(公告)日：2020-01-30

申请号：US16582892

申请日：2019-09-25

Applicant: Nautel Limited

Inventor： Philipp Schmid ,  Brian Walker

IPC: H01L33/64 ,  H01L33/62 ,  H01L33/48 ,  H01L33/00 ,  H01L33/60

Abstract: A system for peak-to-average-power ratio (PAPR) reduction of a frequency shifted plurality of digital broadcast signals taking into account the combined signal peaks in order to transmit the signals more efficiently in a single broadcast transmission system. The PAPR algorithm takes into account a rotating constellation phase offset for the shifted signals corresponding to the amount of applied frequency shift. In the case of a dual sideband In-Band-On-Channel (IBOC) signal typically used in conjunction with an FM carrier in the center, the sidebands can be interleaved to create a new IBOC signal definition and take the place of the FM carrier for an all-digital transmission that is backward compatible with IBOC receivers allowing for a gradual migration to all digital broadcasting.

公开(公告)号：US09088467B2

公开(公告)日：2015-07-21

申请号：US14199013

申请日：2014-03-06

Applicant: Nautel Limited

Inventor： Brian Walker ,  Philipp Schmid

IPC: H04L27/28 ,  H04L27/26 ,  H04B1/04

CPC classification number: H04L27/2614 ,  H04B1/0475 ,  H04B2001/0416 ,  H04L27/2623

Abstract: A method of reducing peak-to-average power in a hybrid signal is provided. The method determines peaks in power by defining a sample point by way of a digital vector and an analog vector. The digital and analog vectors are added together to generate a hybrid vector which is used to compare the sample point to the maximum desired peak threshold. An error vector is used to correct the sample point to a desired power level. Once the sample point has been corrected it can be added back to the analog signal and transmitted.

Abstract translation: 提供了一种降低混合信号中的峰均功率的方法。 该方法通过数字矢量和模拟矢量定义采样点来确定功率峰值。 将数字和模拟向量相加在一起以产生用于将采样点与最大期望峰值阈值进行比较的混合矢量。 使用误差向量将采样点校正到所需的功率水平。 一旦采样点被校正，可以将其加回到模拟信号并传输。