Secure Transmission With Large Numbers of Antennas and Finite Alphabet Inputs

Wu Y, Wang JB, Wang J, Schober R, Xiao C (2017)

Publication Language: English

Publication Type: Journal article

Publication year: 2017


Book Volume: 65

Pages Range: 3614 - 3628

Journal Issue: 8

DOI: 10.1109/TCOMM.2017.2703654


In this paper, we investigate secure transmission over the large-scale multiple-antenna wiretap channel with finite alphabet inputs. First, we investigate the case where instantaneous channel state information (CSI) of the eavesdropper is known at the transmitter. We show analytically that a generalized singular value decomposition (GSVD)-based design, which is optimal for Gaussian inputs, may exhibit a severe performance loss for finite alphabet inputs in the high signal-to-noise ratio regime. In light of this, we propose a novel Per-Group-GSVD (PG-GSVD) design, which can effectively compensate the performance loss caused by the GSVD design. More importantly, the computational complexity of the PG-GSVD design is by orders of magnitude lower than that of the existing design for finite alphabet inputs while the resulting performance loss is minimal. Then, we extend the PG-GSVD design to the case where only statistical CSI of the eavesdropper is available at the transmitter. Numerical results indicate that the proposed PG-GSVD design can be efficiently implemented in large-scale multiple-antenna systems and achieves significant performance gains compared with the GSVD design.

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Wu, Y., Wang, J.-B., Wang, J., Schober, R., & Xiao, C. (2017). Secure Transmission With Large Numbers of Antennas and Finite Alphabet Inputs. IEEE Transactions on Communications, 65(8), 3614 - 3628.


Wu, Yongpeng, et al. "Secure Transmission With Large Numbers of Antennas and Finite Alphabet Inputs." IEEE Transactions on Communications 65.8 (2017): 3614 - 3628.

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