What is a LTE physical (PHY) layer ?
The Physical layer is the first and lowest layer of LTE operating system. This layer is often termed as the LTE PHY layer. Fundamental operation is to interact with hardware at lowest level of support architecture. This layer only handles bit streams and the logical nature of packets are irrelevant. In LTE the bits are stored into symbols and slots. These symbols and slots are handed over to LTE hardware. The final stage of processing involves RF packets over radio links.