| Autor: |
Shevchenko, N.A., Derevyanko, S.A., Prilepsky, J.E., Alvarado, A., Bayvel, P., Turitsyn, S.K. |
| Přispěvatelé: |
Signal Processing Systems, Information and Communication Theory Lab, Center for Wireless Technology Eindhoven |
| Jazyk: |
angličtina |
| Rok vydání: |
2018 |
| Předmět: |
|
| Zdroj: |
IEEE Transactions on Communications, 66(7), 2978-2993. Institute of Electrical and Electronics Engineers |
| ISSN: |
0090-6778 |
| Popis: |
The channel law for amplitude-modulated solitons transmitted through a nonlinear optical fiber with ideal distributed amplification and a receiver based on the nonlinear Fourier transform is a noncentral chi-distribution with 2n degrees of freedom, where n=2 and n=3 correspond to the single- and dual-polarisation cases, respectively. In this paper, we study the capacity lower bounds of this channel under an average power constraint in bits per channel use. We develop an asymptotic semi-analytic approximation for a capacity lower bound for arbitrary n and a Rayleigh input distribution. It is shown that this lower bound grows logarithmically with signal-to-noise ratio (SNR), independently of the value of n. Numerical results for other continuous input distributions are also provided. A half-Gaussian input distribution is shown to give larger rates than a Rayleigh input distribution for n=1,2,3. At an SNR of 25 dB, the best lower bounds we developed are approximately 3.68 bit per channel use. The practically relevant case of amplitude shift-keying (ASK) constellations is also numerically analyzed. For the same SNR of 25 dB, a 16-ASK constellation yields a rate of approximately 3.45 bit per channel use. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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