© The Institution of Engineering and Technology
The possibilities of a known class of chaos-based coded modulation (CCM) systems are expanded to address the problem of high-power amplifier (HPA) non-linearity. The hypothesis is that the CCM non-linear nature can be exploited to counteract its effects on the system perfomance, avoiding the need of a predistorter. An optimisation method for the design of the CCM to prove this hypothesis is proposed. The results show that, for a given back-off level, a non-linear mapping function for the chaos-based encoder and decoder can be designed to compensate the HPA effect on the error rate.
References
-
-
1)
-
2. Escribano, F.J., López, L., Sanjuán, M.A.F.: ‘Analysis of chaos-based coded modulations under intersymbol interference’, J. Comput., 2010, 5, (10), pp. 1459–1467 (doi: 10.4304/jcp.5.10.1459-1467).
-
2)
-
9. Saleh, A.A.M.: ‘Frequency-independent and frequency-dependent nonlinear models of TWT amplifiers’, IEEE Trans. Commun., 1981, 29, (11), pp. 1715–1720 (doi: 10.1109/TCOM.1981.1094911).
-
3)
-
20. Waltz, R.A., Morales, J.L., Nocedal, J., et al: ‘An interior algorithm for nonlinear optimization that combines line search and trust region steps’, Math. Program. J., 2006, 107, (3), pp. 391–408 (doi: 10.1007/s10107-004-0560-5).
-
4)
-
20. Byrd, R.H., Gilbert, J.: ‘A trust region method based on interior point techniques for nonlinear programming’, Math. Program., 1996, 89, pp. 149–185 (doi: 10.1007/PL00011391).
-
5)
-
1. Escribano, F.J., López, L., Sanjuán, M.A.F.: ‘Evaluation of channel coding and decoding algorithms using discrete chaotic maps’, CHAOS, 2006, 16, p. 013103 (doi: 10.1063/1.2126807).
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Optimisation of chaos-based coded modulations for compensation of amplifier non-linearities