LTE Phy Engineering - additional slides

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Here are some additional materials from LTE Phy Engineering course delivered in December 2012 in Santiago de Chile, Chile.
If you are interested in attending top in class LTE/LTE-Advanced courses, please have a look http://is-wirelesstraining.com/trainings or contact us directly: sales@is-wireless.com.

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LTE Phy Engineering - additional slides

  1. 1. OFDM Processing Chain (From Bits to Carrier Frequency) X1 x1 X2 x2 X3 x3 xN … x4 x3 x2 x1101010011101….. X1 X2 X3 X4 … XN Modulator S/P IFFT P/S QPSK/16QAM/64QAM X4 x4 Q … … t I XN xN t t t t Upconverter CP D/A (Local Oscillator) xN … x4 x3 x2 x1 xN xN-1 0MHz fc f 0MHz f fc BW BW Technical content provided by IS-Wireless, www.is-wireless.com
  2. 2. Radio Frame Time Structure 1 Radio Frame (10 ms) 1 subframe (1 ms) Frame =10 subframes 1 slot (0.5 ms)Subframe = 2 slots 1 OFDM symbol (71μs) Slot =7 OFDM symbols CP Useful Part CP Useful Part CP Useful Part CP Useful Part CP Useful Part CP Useful Part CP Useful Part (Normal CP) or 1 OFDM symbol (83μs) Slot =6 OFDM symbols CP Useful Part CP Useful Part CP Useful Part CP Useful Part CP Useful Part CP Useful Part (Extended CP) Technical content provided by IS-Wireless, www.is-wireless.com
  3. 3. Radio Frame Frequency Structure 1 Symbol in the frequency domain Useful Subcarriers Smallest allocation Data Subcarrier Pilot subcarrier 12 SCs (180kHz) (QPSK/16QAM/64QAM symbol) (QPSK symbol) Guardband Guardband(not used SCs) (not used SCs) DC subcarrier Subcarrier (SC) (not used in DL) BW: 1.4MHz = 128 SC (72 useful SC) 3MHz = 256 SC (180 useful SC) 5MHz = 512 SC (300 useful SC) 10MHz = 1024 SC (600 useful SC) 15MHz = 1536 SC (900 useful SC) 20MHz = 2048 SC (1200 useful SC) Technical content provided by IS-Wireless, www.is-wireless.com
  4. 4. Self Organizing Networks Energy saving No UE in a cell Initial Network Configuration eNB UE info about neighbour eNB UE eNB UE UE eNB Coverage Optimization Load BalancingHO Parameter Optimization Neighbour Relation Table Technical content provided by IS-Wireless, www.is-wireless.com
  5. 5. E-UTRAN Self-Configuration/Optimization MME Making -IP address configuration presence in -eNB authentication the EPC -association to SGW Basic Setup -downloading eNB software and parameters: -cell-id, -neighbour cells (ID, IP) -sub-carrier allocation, eNB Self-Configuration -reference signal power (pre-operational state) -antenna tilt -Neighbour list configuration Power ON Initial Radio -coverage/capcaity parameter(or cable connected) configuration configuration -Dynamic fractional frequency reuse Self-Optimisation (operational state) Adaptation & -Neighbour list optimisation Optimization -coverage/capacity control Technical content provided by IS-Wireless, www.is-wireless.com
  6. 6. E-UTRAN SON ANR Management X2 7. Setup X2 interface 6. Update NRT 1. Measure strong signal8. Update neighbor cell list 2. Report: (PHY_CID = 5) - Phy_CID =5 - strong signal 5. Report: Cell B Cell A -Global_CID = 19 Phy_CID=5 Phy_CID=3 Global_CID=19 eNB Global_CID=17 eNB 4. Read BCH 3. Report Global_CID Request: -Target Phy_CID=5 Exploits UE measurements and reporting Technical content provided by IS-Wireless, www.is-wireless.com
  7. 7. LTE Book References1. ”3G evolution : HSPA and LTE for Mobile Broadband”, Erik Dahlman, Stefan Parkvall, Johan Sköld and Per Beming, Academic Press2. “Evolved Packet System (EPS): The LTE and SAE Evolution of 3G UMTS”, Pierre Lescuyer, Thierry Lucidarme3. ”LTE for UMTS, Evolution to LTE-Advanced, Second Edition”, Harri Holma, Antti Toskala, Wiley4. “LTE - The UMTS Long Term Evolution: From Theory to Practice, 2nd Edition” Stefania Sesia, Issam Toufik, Matthew Baker, Wiley Technical content provided by IS-Wireless, www.is-wireless.com

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