Detection of Pilot-hopping Sequences for Grant-free Random Access in Massive Mimo Systems

Ema Becirovic; Emil Björnson; Erik G. Larsson

ICASSP 2019accepted0 citations

Detection of Pilot-hopping Sequences for Grant-free Random Access in Massive Mimo Systems

Ema Becirovic, Emil Björnson, Erik G. Larsson

Abstract

In this paper, we study an active user detection problem for massive machine type communications (mMTC). The users transmit pilot-hopping sequences and detection of active users is performed based on the received energy. We utilize the channel hardening and fa-vorable propagation properties of massive multiple-input multiple-output (MIMO) to simplify the user detection. We propose and compare a number of different user detection methods and find that using non-negative least squares (NNLS) is well suited for the task at hand as it achieves good results as well as having the benefit of not having to specify further parameters.

BibTeX

@inproceedings{icassp2019_detectionofpilot,
  title = {Detection of Pilot-hopping Sequences for Grant-free Random Access in Massive Mimo Systems},
  author = {Ema Becirovic and Emil Björnson and Erik G. Larsson},
  booktitle = {ICASSP 2019},
  year = {2019}
}