Out of Band Emission Suppression and PAPR Analysis in OFDM systems

The sudden discontinuities that are present across the symbols in the Orthogonal Frequency Division Multiplexing (OFDM) system result in high frequency harmonics leading to poor adjacent channel leakage ratio (ACLR). This can lead to harmful interference to adjacent channels and in order to combat t...

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Bibliographic Details
Published inInternational Conference on Communication Systems and Networks (Online) pp. 323 - 326
Main Authors Sam, Roshan S., Kalkundrikar, Vishal, K, Seetharam Kashyap B, Ramanath, Sreenath
Format Conference Proceeding
LanguageEnglish
Published IEEE 03.01.2023
Subjects
Adjacent Channel Leakage Ratio (ACLR)
Bit Error Rate (BER)
Filtering
Interference
Measurement
Peak to average power ratio
Peak to Average Power Ratio (PAPR)
Simulation
Symbols
Throughput
Windowing
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Summary:The sudden discontinuities that are present across the symbols in the Orthogonal Frequency Division Multiplexing (OFDM) system result in high frequency harmonics leading to poor adjacent channel leakage ratio (ACLR). This can lead to harmful interference to adjacent channels and in order to combat this effect, windowing techniques that smooth the transitions across the symbols are used. Since the spectrum emission mask (SEM) requirements are more stringent and may not be satisfied by windowing alone, this is followed by filtering to further restrict the out of band (OOB) emissions. In this paper, we analyse the performance metrics of the OFDM signal when it is subject to windowing and filtering methods. We also provide simulation results and an analytical expression for the peak to average power ratio (PAPR) of an OFDM signal when identical symbols are used across the subcarriers.
ISSN:2155-2509
DOI:10.1109/COMSNETS56262.2023.10041310