An Improved Multicell MMSE Channel Estimation in a Massive MIMO System

Table 2

Impact of large-scale fading estimation and SIU selection on the performance of small-scale fading estimation.

Scheme	𝜀 (dB)	𝜌
Case  1: proposed scheme with ideal 𝛽	−8.91	0.933
Case  2: proposed scheme with estimated 𝛽	−7.53	0.911
Case  3: proposed scheme with ideal 𝛽 but randomly selected SIUs	−2.29	0.806