DOA ESTIMATION FOR HYBRID MASSIVE MIMO SYSTEMS USING MIXED-ADCS: PERFORMANCE LOSS AND ENERGY EFFICIENCY

Due to the power consumption and high circuit cost in antenna arrays, the practical application of massive multiple-input multiple-output (MIMO) in the sixth generation (6G) and future wireless networks is still challenging.Employing low-resolution analog-to-digital converters (ADCs) and hybrid analog and digital (HAD) structure is two low-cost cho

Despite great efforts to warn pregnant women that drugs of abuse impact development of the embryo and the fetus, the use of legal and illegal drugs by childbearing women is still a major public health concern.In parallel with well-established teratogenic effects elicited by some drugs of abuse, epidemiological studies show that certain psychoactive