Open AccessFairness‐aware nonlinear joint transceiver design for energy‐harvesting‐powered CoMP systems
Author(s) -
Hu Zhirui,
Xu Fangmin,
He Meilin,
Lu Conghui,
Zheng Changliang
Publication year - 2020
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/cmu2.12069
Subject(s) - computer science , transceiver , node (physics) , bit error rate , energy harvesting , transmission (telecommunications) , energy (signal processing) , nonlinear system , channel (broadcasting) , signal to noise ratio (imaging) , wireless , mathematical optimization , electronic engineering , computer network , telecommunications , mathematics , engineering , structural engineering , statistics , physics , quantum mechanics
This paper focuses on the fairness‐aware nonlinear joint transceiver design for the energy‐harvesting (EH)‐powered coordinated multi‐point (CoMP) systems. In the EH‐powered CoMP systems, each node harvests the energy independently first. Then, these nodes collaborate for joint signal transmission. Since there is no conventional grid to connect the nodes, the energy among nodes cannot be coordinated. Therefore, per‐node power constraints should be satisfied, which however has not been considered in existing schemes. In this paper, a fairness‐aware nonlinear transceiver scheme is developed under the per‐node power constraints. The nonlinear transceiver design is formulated as an optimization problem to maximize the minimum signal‐to‐interference noise ratio of data streams. A two‐step optimization algorithm is proposed to obtain the closed‐form solutions in the cases with perfect channel state information (CSI) and imperfect CSI, respectively. Simulation results verify the fairness of the proposed algorithm, and demonstrate its performance enhancement in sum‐rate and bit ratio error (BER). For sum‐rate, the proposed algorithm can achieve 12% gain over WS‐MSE and 40% gain over BD at SNR = 20 dB. For BER, it can achieve an approximately 4 dB gain over WS‐MSE and 8 dB gain over BD at BER = 10 −3 .