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This work explores the theoretical and practical performances of the two most recent IEEE standards, 802.11n and 802.11ac. Experiments were conducted to measure data rates to characterize performance effects of distance and interference between different channels. We conclude that the majority of test cases show 802.11ac achieved higher data rates than its predecessor, as expected. However, performance...
In this paper, we consider a MIMO system with two transmit ports and receiver ports in the power-line communications (PLC), and we propose two space time block codes (STBCs) Finite Feedback Schemes (FFSs) for PLC. In each scheme, the transmitter equips with two STBCs, one corresponding to each of the feedback values, to encode the information bits. Because of the impulsive noise in PLC channels, the...
Aiming at reducing the overhead of codebook design and improving the performance of massive multiple-input multiple-output (MIMO) systems, a novel two-stage codebook design is presented in this paper. Using the householder-transform, which perturbs the first-codebook beam direction, the second-codebook can be easily obtained. In addition, the second-codebook maintains the properties of the first-codebook...
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