Near-Field Wideband Channel Estimation for Extremely Large-Scale MIMO (IMAGE) Science China Press Caption Figure 1. Bilinear pattern of near-field beam split Credit ©Science China Press Usage Restrictions Use with credit. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.