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2021 | OriginalPaper | Chapter

OFDM-SIM with Adaptive Modulation Through Fuzzy Interface

Authors : Susmita Chaki, Ipsita Sengupta, Shounak Dasgupta

Published in: Computers and Devices for Communication

Publisher: Springer Singapore

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Abstract

OFDM-SIM offers the advantage of reduced peak-to-average power ratio (PAPR) and improved spectral efficiency in comparison with classic OFDM. Due to frequency selective channel fading, OFDM frames undergo non-uniform attenuation and this results in different SNR values for different frames. Consequently, BER of the system is degraded. This problem can be mitigated by using adaptive modulation scheme depending on SNR values estimated by channel estimator. In this paper, a simple model of OFDM-SIM with adaptive modulation is proposed. Switching decision is implemented by fuzzy interface system. The output BER performance of the OFDM-SIM has been investigated for two types of modulations: 8-PSK and 8-QAM with 10 dB SNR as threshold level.

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Metadata
Title
OFDM-SIM with Adaptive Modulation Through Fuzzy Interface
Authors
Susmita Chaki
Ipsita Sengupta
Shounak Dasgupta
Copyright Year
2021
Publisher
Springer Singapore
DOI
https://doi.org/10.1007/978-981-15-8366-7_24