Theoretical analysis and performance of OFDM signals in nonlinear AWGN channels
| Autor: | S. Cacopardi, Paolo Banelli |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Orthogonal frequency-division multiplexing
complex Gaussian processes nonlinear distortions Correlation function (quantum field theory) Topology Predistortion Amplitude modulation symbols.namesake Additive white Gaussian noise Control theory communication system nonlinearities OFDM clipping AM/AM-AM/PM predistortion Bit Error Rate symbols Baseband Electrical and Electronic Engineering Gaussian process Pulse-width modulation Mathematics |
| Zdroj: | IEEE Transactions on Communications. 48:430-441 |
| ISSN: | 0090-6778 |
| DOI: | 10.1109/26.837046 |
| Popis: | Orthogonal frequency-division multiplexing (OFDM) baseband signals may be modeled by complex Gaussian processes with Rayleigh envelope distribution and uniform phase distribution, if the number of carriers is sufficiently large. The output correlation function of instantaneous nonlinear amplifiers and the signal-to-distortion ratio can be derived and expressed in an easy way. As a consequence, the output spectrum and the bit-error rate (BER) performance of OFDM systems in nonlinear additive white Gaussian noise channels are predictable both for uncompensated amplitude modulation/amplitude modulation (AM/AM) and amplitude modulation/pulse modulation (AM/PM) distortions and for ideal predistortion. The aim of this work is to obtain the analytical expressions for the output correlation function of a nonlinear device and for the BER performance. The results in closed-form solutions are derived for AM/AM and AM/PM curves approximated by Bessel series expansion and for the ideal predistortion case. |
| Databáze: | OpenAIRE |
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