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LDPC assisted GAMP for PAPR reduction in Super-QAM OFDM | IEEE Conference Publication | IEEE Xplore

LDPC assisted GAMP for PAPR reduction in Super-QAM OFDM


Abstract:

The procurement of higher data rates has motivated significant research into supporting very high order M-ary Quadrature Amplitude Modulation (M-QAM), also known as Super...Show More

Abstract:

The procurement of higher data rates has motivated significant research into supporting very high order M-ary Quadrature Amplitude Modulation (M-QAM), also known as Super-QAM, combined with Orthogonal Frequency Division Multiplexing (OFDM). Unmitigated, the high Peak-to-Average Power Ratio (PAPR) of OFDM signals results in very low amplification efficiency. However, schemes that improve efficiency can introduce distortion in the transmitted signal, which is particularly challenging for Super-QAM schemes. We propose a simple PAPR reduction operation at the transmitter, which is combined with a Generalized Approximate Message Passing (GAMP) receiver, which is known to cope with nonlinear distortion. It is shown that GAMP’s convergence can be greatly improved by incorporating a Low Density Parity Check (LDPC) code within the GAMP detection algorithm, which allows for significantly low PAPR values.
Date of Conference: 23-25 October 2023
Date Added to IEEE Xplore: 01 January 2024
ISBN Information:
Conference Location: Corfu, Greece

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