Abstract: A new method of pre-coding and decoding for large scale MIMO (Multiple Input Multiple Output) is proposed. Among the existing methods, the pre-coding matrix has high structure complexity, ...

Global growth is projected at –4.9 percent in 2020, 1.9 percentage points below the April 2020 World Economic Outlook (WEO) forecast. The COVID-19 pandemic has had a more negative impact on activity ...