Zaichen Zhang

TL;DR: 6G with additional technical requirements beyond those of 5G will enable faster and further communications to the extent that the boundary between physical and cyber worlds disappears.

TL;DR: This letter focuses on joint user activity and data detection in the uplink grant-free non-orthogonal multiple access systems based on approximate message passing (AMP) and expectation maximization (EM) algorithms.

TL;DR: In this paper, the achievable spectral efficiency of adaptive modulation for three different schemes for high speed VLC: dc-biased optical orthogonal frequency division multiplexing, asymmetrically clipped optical OFDM (ACO-OFDM), and single-carrier frequency domain equalization (SC-FDE) was analyzed.

TL;DR: Simulation results demonstrate that the DLCS channel estimation scheme outperforms the existing schemes in terms of the normalized mean-squared error and the spectral efficiency, while the DLQP hybrid precoder design method has better spectral efficiency performance than other methods with low phase shifter resolution.

TL;DR: The results show that the proposed 3-D channel model is in close agreement with previously reported results, thereby validating the generalization of the proposed model.