Abstract: Accurate downlink (DL) channel state information (CSI) is crucial for effective precoding in massive multiple-input multiple-output (MIMO) systems. Operating in time-division duplexing (TDD) ...

A large, long-term study found that playing a brain training video game may help protect the brain against dementia for decades. Experts say the findings are the strongest evidence yet that cognitive ...

The France defender had been frozen out at Chelsea under previous manager Enzo Maresca, spending the second half of last season on loan at Aston Villa before being forced to train with the so-called ...