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Massive Machine Type Communication (mMTC) is one key usage scenario in future 5G. To fulfill the massive connection requirement in mMTC, and reduce the signaling overhead, a novel grant free Random Non-Orthogonal Multiple Access (RNOMA) scheme is proposed in this paper, inspired by the concept of conventional NOMA. In RNOMA, one physical resource area is reserved and divided into orthogonal resource...
Polymer-derived nano-sized SiC(BN) was successfully introduced into porous Si 3 N 4 ceramic by precursor infiltration pyrolysis (PIP). After PIP, the porous Si 3 N 4 –SiC(BN) ceramic possesses improved mechanical properties and excellent dielectric properties. As the annealing temperature increases from 900°C to 1800°C, the mechanical properties of porous Si 3 ...
In this work, we present two high-rate quasi-orthogonal space-time coding (STC) schemes for three and four transmit antennas which are designed in conjunction with the serial interference cancellation (SIC) based receiver. The symbols of the proposed STCs are of judiciously designed diversity order which can be effectively exploited by the SIC based receiver to cancel interference as well as to obtain...
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