Abstract

A random access (RA) technique that is suitable for millimeter-wave cellular systems with multiple beams is proposed in this paper. A new random access preamble (RAP) is proposed to reduce the RA duration by carrying the information on beam IDs (BIDs) as well as preamble ID (PID). The properties of the RAPs such as the constant amplitude, correlation, false-alarm probability, and detection probability are analyzed for RA in a multi-user environment. It is shown by simulation that the proposed RAP is well-suited for mm-wave cellular systems with multiple beams because of its high detection probability in a multi-user environment and shorter processing time.

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