Spatial-wideband effect in line-of-sight MIMO communication

Mojahedian, Mohammad Mahdi; Attarifar, Masoud; Lozano Solsona, Angel

doi:http://dx.doi.org/10.1109/ICC45855.2022.9839032

Spatial-wideband effect in line-of-sight MIMO communication

Citation

Mojahedian MM, Attarifar M, Lozano A. Spatial-wideband effect in line-of-sight MIMO communication. In: IEEE International Conference on Communications (ICC 2022); 2022 May 16-20; Seoul, Republic of Korea. [Piscataway]: IEEE; 2022. p. 3972-7. DOI: 10.1109/ICC45855.2022.9839032

Abstract

This paper addresses the spatial-wideband effect in line-of-sight multiple-input multiple-output channels. This effect arises once the bandwidth is large enough that the differences in propagation delays for distinct transmit-receive antenna pairs cease to be negligible relative to the symbol period; this, in turn, gives rise to intersymbol interference. The impact of this effect is quantified as a function of the relevant geometric parameters (range, array orientations, antenna spacings) and a family of scalable solutions is proposed to counter it. In particular, a solution based on per-antenna delay lines at transmitter and receiver is shown to be highly effective, and a criterion is derived to set those delay lines as a function of the channel.