LoS communications using large circular array for mmWave C-RAN network

This paper considers the application of large circular array to Line-of-Sight (LoS) multi-user Communications for C-RAN networks using the millimeter wave (mmWave) spectrum. Based on the symmetric geometry of the arrays, a spatial-harmonic-based interference suppressor (SHBIS) is proposed and evaluated in closed-form. For this receiver to work, a 2-D direction-of-arrival (DoA) information estimation method based on synthesizing spatial harmonics to form a scanning function is put forward.