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Adaptive Threshold Optimization for a Blanking Nonlinearity in OFDM Receivers

Epple, Ulrich and Schnell, Michael (2012) Adaptive Threshold Optimization for a Blanking Nonlinearity in OFDM Receivers. IEEE Globecom 2012, 2012-12-03 - 2012-12-07, Anaheim, USA.

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Abstract

The application of a blanking nonlinearity to cope with impulsive interference is a common approach in OFDM systems. The choice of the amplitude threshold to decide whether a received sample is blanked heavily affects the performance of the entire transmission. Unfortunately, the perfect blanking threshold strongly depends on the characteristics of the interference. In previous publications this perfect threshold has been derived, given knowledge about the interference statistics. However, in general no reliable information about the interference statistics is known at the receiver side. In this paper a practical method for calculating an adaptive blanking threshold to maximize the signal-to-interference-and-noise ratio after the blanking nonlinearity is proposed. The calculation is based on the distribution of the amplitude of the received signal at the OFDM receiver. Simulation results show only a negligible performance degradation when comparing the proposed method to the case where the theoretically derived perfect threshold is applied for blanking.

Item URL in elib:https://elib.dlr.de/95560/
Document Type:Conference or Workshop Item (Speech)
Title:Adaptive Threshold Optimization for a Blanking Nonlinearity in OFDM Receivers
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Epple, UlrichUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schnell, MichaelUNSPECIFIEDhttps://orcid.org/0000-0001-5913-6648UNSPECIFIED
Date:December 2012
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:OFDM, pulse blanking, blanking threshold, impulsive interference mitigation
Event Title:IEEE Globecom 2012
Event Location:Anaheim, USA
Event Type:international Conference
Event Start Date:3 December 2012
Event End Date:7 December 2012
Organizer:IEEE
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:ATM and Operation (old)
DLR - Research area:Aeronautics
DLR - Program:L AO - Air Traffic Management and Operation
DLR - Research theme (Project):L - Communication, Navigation and Surveillance (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Communications Systems
Deposited By: Epple, Ulrich
Deposited On:10 Mar 2015 10:53
Last Modified:24 Apr 2024 20:01

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