Power allocation for multi-user OFDM-DCSK system in frequency selective fading channel |
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| Affiliation: | 1. Department of Electronics, Computers, Telecommunications and Control, Faculty of Physics, National and Kapodistrian University of Athens, Athens 15784, Greece;2. National University of Computer and Emerging Sciences (FAST-NU), Lahore, Pakistan;1. Department of Electrical and Electronics Engineering, Bilkent University, Ankara, 06800, Turkey;2. Laboratory of Information and Decision Systems, Massachusetts Institute of Technology (MIT), Cambridge, MA 02139, United States;1. Department of Electrical and Computer Engineering, University of Thessaly, Volos, 38221, Greece;2. Networks Department at Simula Research Lab, Oslo, Norway |
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| Abstract: | In this paper, we introduce a grouping approach for power allocation in the multi-user OFDM-DCSK (MU-OFDM-DCSK) system under the frequency selective fading channels. The suggested procedure is convenient also for the other comb-type non-coherent schemes with similar structure. Furthermore, we derive analytical bit error rate (BER) expression for the grouped scheme and offer an optimal power distribution policy for both the single- and multi-user scenarios. This power assignment strategy is formulated by a min–max problem with the target of the worst group BER minimization incorporating total power and interference constraints. Simulation results confirm the advantages of the proposed power allocation scheme. |
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| Keywords: | Power allocation Frequency selective channel Min–max OFDM-DCSK |
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