OFDM-SIM with Adaptive Modulation Through Fuzzy Interface
| Autor: | Shounak Dasgupta, Susmita Chaki, Ipsita Sengupta |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Orthogonal frequency-division multiplexing
Computer science Attenuation Estimator 020206 networking & telecommunications Link adaptation 02 engineering and technology Spectral efficiency Fuzzy logic Computer Science::Performance Computer Science::Networking and Internet Architecture 0202 electrical engineering electronic engineering information engineering Electronic engineering Fading Computer Science::Information Theory Communication channel |
| Zdroj: | Computers and Devices for Communication ISBN: 9789811583650 |
| DOI: | 10.1007/978-981-15-8366-7_24 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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