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Minimized SER and QOS Based Power Allocation Strategies for Multi HDAF Relay Cooperative Network

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Abstract

In this paper, a multi hybrid decode-amplify-forward relay cooperative network with perfect CSI in flat Rayleigh fading channel is considered. Using moment generating function based approach, the closed form of symbol error rate (SER) with asymptotic approximation is derived. Based on the lower bound of SER (Olfat and Olfat in IET Commun 5(4):2018–2027, 2011), Lagrange multiplier method and differential evolution (DE) algorithm based power allocation schemes are proposed. With fixed source power, the relay powers are optimized with the proposed schemes by the power allocation factor. Further the SER performance of proposed power allocation schemes is investigated by varying the location of the relays. The performance gain of proposed power allocation schemes depends on the channel quality of source to relay and relay to destination links. It is observed that the proposed power allocation schemes outperform the equal power allocation scheme and DE based power allocation provides SER response close to power allocation with Lagrange multiplier method. In order to achieve the target SER (quality of service) minimum power allocation is introduced as minimum relay power allocation and minimum source and relay power allocation.

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Authors and Affiliations

  1. Department of Electrical Engineering, National Institute of Technology, Rourkela, Orissa, India

    Kiran Kumar Gurrala & Susmita Das

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  1. Kiran Kumar Gurrala
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  2. Susmita Das
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Correspondence to Kiran Kumar Gurrala.

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Gurrala, K.K., Das, S. Minimized SER and QOS Based Power Allocation Strategies for Multi HDAF Relay Cooperative Network. Wireless Pers Commun 96, 779–798 (2017). https://doi.org/10.1007/s11277-017-4200-9

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