公开(公告)号：US20240007337A1

公开(公告)日：2024-01-04

申请号：US17854155

申请日：2022-06-30

Applicant: Intel Corporation

Inventor： Sunitha Motipalli ,  Kameran Azadet ,  Albert Molina ,  Joseph Othmer ,  Kannan Rajamani

IPC: H04L27/26

CPC classification number: H04L27/2618 ,  H04L27/262 ,  H04L27/2615 ,  H04B1/0475

Abstract: Techniques are disclosed for the use of Crest Factor Reduction (CFR) technique that utilizes a cancellation pulse signal having a reduced length. The CFR technique may be applied to a signal to be transmitted, which may comprise a composite signal having one or more carrier signals. Each carrier signal of the composite signal may be filtered via a respective channel filter and then recombined to form the signal to be transmitted, on which the CFR operations are then applied. The length of the cancellation pulse signal is less than the number of taps of the channel filter with the largest number of taps. This reduction in cancellation pulse signal length significantly reduces the processing power required to perform the CFR operations while maintaining regulatory emissions compliance.

公开(公告)号：US20240004957A1

公开(公告)日：2024-01-04

申请号：US17854095

申请日：2022-06-30

Applicant: Intel Corporation

Inventor： Sunitha Motipalli ,  Kameran Azadet ,  Albert Molina ,  Joseph Othmer ,  Kannan Rajamani

IPC: G06K9/00

CPC classification number: G06K9/0053 ,  G06K9/0055

Abstract: Techniques are disclosed for the use of Crest Factor Reduction (CFR) algorithm that performs oversampling of an input signal and a cancellation pulse, and detects a set of peak samples in the upsampled input signal that exceed a predetermined threshold value. The peak samples are clustered such that a subset of the oversampled signal peaks are used to compute gain factors for the generation of a scaled truncated upsampled cancellation pulse. Several scaled truncated upsampled cancellation pulses are applied in parallel to perform peak cancellation of the highest peak in each cluster as part of an initial peak cancellation process. Any remaining peaks are canceled by iterative gain factors computation process. A final cancellation pulse is then generated by multiplying a cancellation pulse by the computed gain factors.