An Improved Multicell MMSE Channel Estimation in a Massive MIMO System

Table 4

Comparison of computational cost (unit: MIPS).

Channel estimation scheme	Large-scale fading estimation	Small-scale fading estimation	Total	Total savings
Improved multicell MMSE 𝐾1=12	28	136.9	164.9	—
Full-cell MMSE	28	397.3	425.3	61.2%
Single-cell MMSE	28	113.2	141.2	−16.8%