Modified conjugate beamforming for cell-free massive MIMO

Attarifar, Masoud; Abbasfar, Aliazam; Lozano Solsona, Angel

doi:http://dx.doi.org/10.1109/LWC.2018.2890470

Modified conjugate beamforming for cell-free massive MIMO

Citation

Attarifar M, Abbasfar A, Lozano A. Modified conjugate beamforming for cell-free massive MIMO. IEEE Wireless Communications Letters. 2019 Apr;8(2);616-9. DOI: 10.1109/LWC.2018.2890470

Abstract

We present a modification of conjugate beamforming for the forward link of cell-free massive MIMO networks. This modification eliminates the self-interference and yields a performance that, without forward pilots, closely approaches what would be achieved with such pilots in place. The simplicity of conjugate beamforming is preserved, with no need for matrix inversions, at the expense of fading-rate coordination among the access points.