An Improved Multicell MMSE Channel Estimation in a Massive MIMO System

Table 3

Performance comparison of channel estimation schemes.

Channel estimation scheme	𝜀 (dB)	𝜌
Single-cell MMSE 𝐾1=0	−2.36	0.828
Improved multicell MMSE 𝐾1=4	−5.33	0.879
Improved multicell MMSE 𝐾1=12	−6.72	0.901
Improved multicell MMSE 𝐾1=24	−8.41	0.927
Improved multicell MMSE 𝐾1=48	−9.23	0.938
Improved multicell MMSE 𝐾1=96	−8.96	0.934
Full-cell MMSE 𝐾1=144	−8.86	0.933