Abstract
In this paper, the energy efficiency (EE) for a distributed antenna system (DAS) with discrete-rate adaptive modulation (AM) is investigated, and an optimal adaptive power allocation (PA) scheme for maximizing EE is developed. First of all, the system model of DAS based on discrete-rate AM is presented. Then, subject to transmit power per antenna and target bit error rate (BER), a constrained optimized problem is formulated to maximize EE of DAS. By solving KKT conditions, we derive the optimal solution as a closed form. The obtained closed-form expression is applicable to DAS with an arbitrary number of distributed antennas (DA) ports and general per-DA port power and target BER constraints. To illustrate the validity of the developed scheme, the exhaustive search method is used in the simulation to compare with the developed scheme. As a result, the proposed power allocation method produces the EE and spectrum efficiency (SE) identical to the exhaustive search method with remarkably reduced computational complexity. Moreover, the EE and SE of the DAS with AM increase as the target BER increases.
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Kim, H., Lee, S., Song, C.: Optimal power allocation scheme for energy efficiency maximization in distributed antenna systems. IEEE Trans. Commun. 63(2), 431–440 (2015)
He, C., Li, G., Zheng, F., You, X.: Energy-efficient resource allocation in OFDM systems with distributed antennas. IEEE Trans. Veh. Technol. 63(3), 1223–1231 (2014)
Wu, Y., Sun, X., Tan, X.: Cooperative distributed energy generation and energy trading for future smart grid. In: IEEE Control Conference, pp. 8150–8157 (2014)
Zhang, J., Andrew, J.: Distributed antenna systems with randomness. IEEE Trans. Wirel. Commun. 7(9), 3636–3646 (2008)
Zhou, Y., Zhong, C., Jin, S.: A low complexity multiuser adaptive modulation scheme for massive MIMO systems. IEEE Signal Process. Lett. 23(10), 1464–1468 (2016)
Goldsmith, A., Chua, S.: Adaptive coded modulation for fading channels. IEEE Trans. Commun. 46(5), 595–602 (1998)
Qiu, X., Chawla, K.: On the performance of adaptive modulation in cellular systems. IEEE Trans. Commun. 47(6), 884–895 (1999)
Yu, X., Tan, W., Wu, B., Li, Y.: Discrete-rate adaptive modulation with variable threshold for distributed antenna system in the presence of imperfect CSI. China Commun. 11(13), 31–39 (2014)
Wang, H., Yu, X., Wang, Y.: Energy-efficient power allocation scheme for DAS with adaptive modulation. In: International Conference on Wireless Communications & Signal Processing, pp. 1–5 (2016)
Cho, K., Yoon, D.: On the general BER expression of one and two dimensional ampli-tude modulations. IEEE Trans. Commun. 50(7), 1074–1080 (2002)
Acknowledgement
This work is partially supported by National Natural Science Foundation of China (61601220), Open Research Fund of National Mobile Communications Research Laboratory of Southeast University (2017D03), and Six Talent Peaks Project in Jiangsu (2015-DZXX-007).
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© 2018 ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering
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Wang, X., Yu, X., Teng, T., Wang, G. (2018). Energy-Efficient Power Allocation Scheme Based on Discrete-Rate Adaptive Modulation in Distributed Antenna System. In: Meng, L., Zhang, Y. (eds) Machine Learning and Intelligent Communications. MLICOM 2018. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, vol 251. Springer, Cham. https://doi.org/10.1007/978-3-030-00557-3_29
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DOI: https://doi.org/10.1007/978-3-030-00557-3_29
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