| Citation: | Xiangdong JIA, Shanshan JI, Qiaoling FAN, Xiaorong YANG. Backhaul Scheme and Performance Study of Full-duplex Multi-tier Heterogeneous Networks Based on Non-orthogonal Multiple Access[J]. Journal of Electronics & Information Technology, 2019, 41(4): 945-951. doi: 10.11999/JEIT180463
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To establish effective backhaul connection in multi-tiers Heterogeneous Network (HetNet), by exploiting advanced Non-Orthogonal Multiple Access (NOMA) a novel in-band wireless backhaul scheme is proposed at full-duplex Small cell Base Stations (SBSs). Firstly, a K+1 HetNet is investigated, where the first tier consists of Macro Base Stations (MBSs) that are equipped with massive MIMO antennas and the remainder K tiers consist of the different types of single-antenna SBSs. The base stations of the whole network operate in full-duplex mode. Specially, the downlink transmission of MBSs is considered. Hence, at each SBS the backhaul signal is superposed over the downlink signal. Then, by using the method from stochastic geometry and modeling all network’s elements as independent homogeneous Poisson Point Processes (PPPs) in this HetNet model, the coverage probabilities of up access link and backhaul link of SBSs are investigated as well as the throughput of small cells. Finally, the presented simulations and numerical results show that the coverage probability of small cell backhaul is changing monotonously with the power sharing efficient, but the monotony is not held for the power of mobile users. Compared with the systems without NOMA, it is found that with reasonable power allocation factor, the NOMA-deployed ones achieve the evident throughput gain.
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