Performance evaluation of companded localized FDMA for LTE uplink communications
| Autor: | G. B. S. R. Naidu, V. Malleswara Rao |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Logarithm
Frequency-division multiple access Computer science General Chemical Engineering General Engineering General Physics and Astronomy Word error rate Power (physics) Airy function Telecommunications link Electronic engineering Bit error rate General Earth and Planetary Sciences General Materials Science Companding General Environmental Science |
| Zdroj: | SN Applied Sciences. 2 |
| ISSN: | 2523-3971 2523-3963 |
| DOI: | 10.1007/s42452-020-3092-6 |
| Popis: | The maximum-to-expected power ratio is critical metric in the current day mobile communications. Single-carrier frequency division multiple access is the most promotional scheme to reduce the peak-to-average power ratio in order to compromise the bit error rate for mobile communications. The proposed companding functions play a vital role in SC-FDMA than in OFDMA for LTE uplink systems. Here, in this paper the nonlinear compandings like μ-law, error, logarithmic, exponential, trapezoidal and airy function are more attractive to solve the problem and analyze PAPR and BER. The μ-companding is not recommended to use because of its average power and outband radiation. This paper proposed a companding functions based on special function to limit power ratio without enhancing the average power. The novel airy function gives suitable trade-off with their power ratio PAPR and error rate BER. The suggested method maintains superior performance with and without decompanding function in SC-FDMA systems at the receiver side without effecting the complexity. |
| Databáze: | OpenAIRE |
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