Legal Disclaimer

Tech in your hand
Custom Search

Feedback ? Send it to admin@fullchipdesign.com or join me at fullchip@gmail.com

Legal Disclaimer

An easy approach to understand tech specs
Learn to Impress
Home.Pics.LTE Home.OFDMA  .
Home LTE Home LTE Intro Data rates CAR of 4G SL Mobility EPC Arch Interfaces LTE Cells Multi Antenna Access Tech LTE Frame Alt Frame PHY Layer LTE vs. CDMA LTE or WiMax LTE VOIP
Previous.Next.
The LTE Physical layer is the first and lowest layer of computing operating system.  This is often termed as the LTE PHY layer. Fundamental operation of this layer is to support hardware implementation of LTE standard. This layer only handles bit streams and the logical nature of packets are irrelevant. In LTE the bits are stored into symbols and slots and transmitted through frames over the RF link.
Detailed understanding of LTE physical layer involves the understanding of LTE generic frame structure to support FDD and TDD.
TS - Time Slot
LTE frame 2
LTE frame 1
LTE frame n-1
LTE frame n
Sub Frame 1
Sub Frame 2
Sub Frame 3
Sub Frame 9
Sub Frame 10
TS0
TS1
TS2
TS3
TS17
TS18
TS19
TS20
What is a LTE physical (PHY) layer and generic frame structure for FDD and TDD
Evolved Packet Core (EPC) system architecture for all IP.Mobility Management Entity (MME),
Serving System (S) Architecture (A) Evolution (E) Gateway or Serving Gateway SGW.
Packet Data Network (PDN) SAE Gateway
Enhanced Packet Data Gateway (ePDG)
Multiple antenna techniques - MIMO, Adaptive antenna systems - AAS and Antenna diversity - AD
Generic Frame Structure to support  both FDD and TDD
The the frame standard supports both FDD and TDD based transmissions. Parameters of this frame structure is below:

Frame Duration = 10 ms or 10/1000000 second.
One Frame has 10 sub-frames.
Sub-frame duration = 1 ms or 1/1000000 second.
One Sub-frame has 2 time slots.
One Time slot = .5 ms or 1/2000000 second.
Next topic - Alternative frame structure only for TDD. (coming soon)
Cloud Computing ?
Whenever a document or photo is uploaded on the web, a thread of cloud computing is active. Learn more from here.
Each slot can itself contain many OFDM symbols. The difference in number of symbols are dependent on the Cyclic Prefix (CP) length.