Abstract
We study physical layer secure transmission with limited feedback in heterogeneous cellular networks. A transmission protocol is designed to obtain more secure and accurate channel state information (CSI) for enhancing the secrecy performance. Under the proposed protocol, we derive expressions of coverage probability and secrecy outage probability to analyze the security performance with different system parameters such as feedback CSI length and number of antennas. Furthermore, an iteration algorithm is proposed to balance the tradeoff between the feedback and transmission time, and maximize the average secrecy throughput under coverage and secrecy outage constrains. Numeric results demonstrate the optimal feedback overhead and the maximum average secrecy throughput are influenced by the number of antennas.
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This work was supported in part by National Key Research and Development Program of China (Grant No. 2017YFB0801900).
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Jiang, W., Huang, K., Xiao, S. et al. Secure transmission for heterogeneous cellular network with limited feedback. Sci. China Inf. Sci. 63, 220304 (2020). https://doi.org/10.1007/s11432-019-2836-0
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DOI: https://doi.org/10.1007/s11432-019-2836-0