Telesystem Innovations  - This article presents an overview of the LTE physical layer with a focus on essential aspects of the physical layer for FDD mode, which is the dominant mode of operation. Here is useful introduction to practitioners involved in designing LTE based-networks and systems. Part I looks at multiple access techniques and physical layer parameters.

The design of the LTE physical layer (PHY) is heavily influenced by requirements for high peak transmission rate (100 Mbps DL/50 Mbps UL), spectral efficiency, and multiple channel bandwidths (1.25-20 MHz). To fulfill these requirements, orthogonal frequency division multiplex (OFDM) was selected as the basis for the PHY layer.

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