Grant-Free Random Access Enhanced by Massive MIMO and Non-Orthogonal Preambles
Hao Jiang,
Hongming Chen,
Hongming Hu
et al.
Abstract:Massive multiple input multiple output (MIMO) enabled grant-free random access (mGFRA) stands out as a promising random access (RA) solution, thus effectively addressing the need for massive access in massive machine-type communications (mMTCs) while ensuring high spectral efficiency and minimizing signaling overhead. However, the bottleneck of mGFRA is mainly dominated by the orthogonal preamble collisions, since the orthogonal preamble pool is small and of a fixed-sized. In this paper, we explore the potenti… Show more
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