LTE uses two different radio links for downlink and uplink, that is, from tower to device, and vice versa. For the downlink, LTE uses an OFDMA (orthogonal frequency division multiple access), which requires MIMO.
What you are referring to is called plaque, and it's a hallmark of atherosclerosis or arteriosclerosis (they both mean the same thing). Basically, cholesterol deposits end up lining the interior walls (lumen, intima) of the arteries narrowing the opening.
Atherosclerosis is a disease of the arteries in which fatty deposits called plaques or atheroma collect on the insides of the artery walls, leading to narrowing and obstruction of blood flow. This condition can affect all the arteries in the body.The coronary arteries (that is, arteries that supply the heart) can become blocked in various ways: by plaques forming around the walls, plaque can rupture and release fatty deposits that can block the arteries, or a blood clot can attach to the plaque.therosclerosis is a disease of the arteries in which fatty deposits called plaques or atheroma collect on the insides of the artery walls, leading to narrowing and obstruction of blood flow. This condition can affect all the arteries in the body.