4th Generation Wireless Systems

Focus on 3GPP LTE

Dr. Sondur LakshmipathiMYMO Wireless Technology Pvt Ltd

Entrepreneurship Center Indian Institute of Science

Bangalore

30 Sept 2010

Agenda

• KEY DRIVERS FOR THE 4G TECHNOLOGIES

• 3GPP LTE: AN EMERGING 4G STANDARD

• KEY TECHNOLOGIES FOR LTE

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KEY DRIVERS FOR THE 4G TECHNOLOGIES

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Cellular Evolution: GSM Phones Enhancing to IP Based LTE

• Phenomenal growth of cellular users across globe

– GSM Global coverage is 80%

– Spread across 219 countries and 750 Operators around the globe

– In India alone, 500 Million cell phone users presently – TOI, Dec’09

– In-Stat surveys show 3 out of 5 users prefer handheld phones with

one-stop communications LTE will be the one stop solutions device

– LTE being standardized as Advanced GSM Huge Mkt opportunities

3GPP LTE* is the natural successor to GSM 4*Third Generation Partnership Project (3GPP)

Cellular Evolution: (contd..)GSM Phones Enhancing to IP Based LTE

• We are at the beginning of a new revolution of 3G & 4G communications – More than 80% of cellular operators are adopting LTE – Emergence of new Competitive & Complementary wireless with

unbelievable speeds and quality – WiFi, WHD exceed 100Mbps– Voice-service by cellular networks is transforming to totally IP-based

networks through LTE

• LTE Mobile Broadband to Generate $70 Billion in Revenues Within 5 Years - Juniper Research, 31 Mar’10

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Business drivers: Evolution of new cellular standard

• Phenomenal growth of cellular users across globe– In India crosses 500M cell phone users– Worldwide 3 billion users

1G 2G 3.5G3G

Analog Cellular•Voice•AMPS•TACS

GSM,CDMA•Voice•Pager•10kbps data•TDMA/CDMA

eHSPA, EVDO•Voice/Video•Email/Web•10Mbps data•TDMA/CDMA

LTE•Voice over IP•Video over IP•Email/Web•DVB, Multimedia•100 Mbps data•MIMO-OFDM

4G

LTE++•Voice over IP•Video over IP•Email/Web•DVB, Multimedia•1 Gbps data•MIMO-OFDM

2G 3.5G3G

IEEE 802.11b•Email/Web•11Mbps data•CSMA-CA•CCK

IEEE 802.11g,a•Voice over IP•Video over IP•Email/Web•54 Mbps data•CSMA-CA•OFDM

IEEE 802.11n•Voice over IP•Video over IP•Email/Web•600 Mbps data•CSMA-CA•MIMO-FODM

4G

IEEE 802.11VHT•HDTV, OH Projector•Voice.Video over IP•Email/Web•1.2 Gbps data•CSMA-CA•MIMO-FODM

WiFiEvolution

CellularEvolution

1980 1994-98 2008-09 2010-11 2012-14

Cellular & WiFi: The two most successful technologies that hold great promise for future markets

Cellular & WiFi: Two Decades of Phenomenal Growth

Emerging 3G and 4G Standards

Application Segments• Voice, Video, Data, Multimedia Broadcast

Differentiation• Low Power & Low Gate Count , Small Form Factor, High Performance• Innovative solutions

WiFi IEEE 802.11n600 Mbps

IEEE 802.11vht1.2 Gbps

WIMAX IEEE 802.16e72 Mbps

IEEE 802.16m100+ Mbps

3gpp LTE 3gpp LTE100 Mbps

3gpp LTE+180 Mbps

WirelessHD Ver1.04 Gbps

Ver2.025 Gbps

UWB MBOA480 Mbps

IEEE 802.15.3a+1 Gbps

Technology Emerging 3G2008-2010

Future 4G Stds2011-2014

NFCRFIDSmart Cards

NFC & WSN Combos

WCDMA EVDO UMB1 Gbps

3GPP LTE: EMERGING 4G STANDARD

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What is 3GPP LTE? Why is 3GPP LTE?

A flat all IP-architecture with an air-interface that exploits latest advances in communications like SC-FDMA, OFDMA and MIMO.A next-generation enhancement to GSM and CDMA

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LTE Uplink uses Multi-User MIMO, which pairs-up UEs to share the same UL resource to increase cell Throughput

At any given instant, cell’s spectral resource is shared between all active users

Multi Users per Cell: Active, Idle and MU-MIMO modes

Great Scope for LTE Technology Innovations: Cooperative Communications

WiFi2.4GHz

LTE2.7GHz

LTE Tx-Rx in SISO/MIMO

WiFi Tx-Rx in SISO/MIMO

LTE SISO

WiFi SISO

Connectivity toWiFi and LTE in SISO/MIMO mode

NBnon-LTE

WiLTEHH Phone

LTE BS

WiFi

Connectivity toNotebook and LTE BS

WiLTEPhone

WiFiAccess Point

LTE BS

Switching b/wAP or LTE BS

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Global Commitments on LTE

March, 2009 Compilation:List compiled from Informa Telecoms & Media and public announcements. It includes a variety of commitment levels including intentions to trial, deploy, migrate, etc.

For additional information contact info@3gamericas.org

http://www.3gamericas.org/documents/LTE%20Commitments%20Mar%202009.pdf

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Global Commitments on LTE (contd..) http://www.3gamericas.org/documents/LTE%20Commitments%20Mar%202009.pdf

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MYMO LTE IP & PRODUCTS

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About MYMO Wireless Technology Pvt Ltd

MW1000 : Test Engineers Delight

RF Unit

GPS 10MHz

ANT ANT

Ref Clk1 PPS

MW1000

Desktop CPU

eNodeBRRH

DL & ULResults

MW1000 : Wave Capture

eNodeBRRH

RF Unit

GPS 10MHz

ANT ANT

Ref Clk1 PPS

MW1000

DesktopCPU

LTE UE

eNodeBDL

UERACH REQ

Splitter Splitter

Splitter

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State-of-the-art algorithm Designs

Patented methods & algorithms for low power and gate count

Seamlessly integrated & partitioned code for HW: PHY-MAC-RLC-PDCP-RRC

Meeting real-time latency constraints as per UE Specs on Quadcore Pentium

Highly optimized

soft IP

Fully verified by 3rd party test tools

RTL Build for SoC/ ASIC

Differentiating Factors

MYMO Wireless Confidential

DST-Lockheed Martin Gold Medal 2009 NASSCOM-2009 Top 6 Finalists Award

KEY TECHNOLOGIES FOR LTE

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OFDM: Orthogonal Frequency Division Multiplexing

• Illumination by single light • Illumination not uniform in all corners of a hall• Break down of bulb complete loss of light

• Illumination by many small light• Illumination is uniform in all points of a hall• Break down of a bulb continue illumination

by other lights

fc fc

fc+Δffc+2Δf

Fc-ΔfFc-2Δf

Single Carrier Modulation Multi-carrier Modulation

Equal Power

Equal PowerP1 P2 P3 P4 P5 P6 P7 P8 P9

P

P = P1+P2+P3+P4+P5+P6+P7+P8

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Multipath

MultipathDirect path

Fading Affects spectrum of Single Carrier Modulation

f

Fading Affecting Multi-carrier Modulation

c

cf

Fading Channel Performance Comparison: Single Carrier and OFDM

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User 1 Channel freq response

User 2 Channel freq response

OFDMA: Multiplexing of Multi User OFDM Signals

•For User-1 and User-2 subcarriers are selected with better SNR.

•Then User-1 and User-2 subcarriers are Multiplexed forming the OFDMA signal

• In LTE Channel Quality Indicator (CQI) is used to select the subcarriers by eNodeB

User 1 & User 2 subcarriers multiplexed

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QAMMapping

ResourceAllocation

M PointDFT Map

Mapping toSubcarriers

PerformN-point IFFTAdd CP; N>M

RF UpConversion

QAMDe-Mapping

ResourceDemux

M PointDFT Map

Mapping toSubcarriers

PerformN-point IFFTAdd CP; N>M

RF DownConversion

BRP

Frequency domain Time domainTime domain

Transform Precoding OFDMData & Control

SC-FDMA Transmitter at the User Equipment

SC-FDMA Receiver at the eNodeB

Up Link: SC-FDMA Transmitter and Receiver

+

MAC

BRPMAC

BRP = Bit Rate Processing

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Code BlockSegmentation

Channel Coding

RateMatching

Code BlockConcatenation

CircularBuffering

MAC

Logic Channel

TransportChannels

CodeWord-0

CodeWord-1

Scrambling

QAM MapQPSK

16QAM64QAM

ScramblingQAM Map

QPSK16QAM64QAM

LayerMapper

Tx Div:CDD

SFBCBeamform

Precoding

2x2MIMO

Precoding

SubcarrierMapper

SubcarrierMapper

OFDM

OFDM

RF

Down Link: OFDMA 2x2 MIMO Transmitter Bit Rate Processing

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THANK YOU

Q & A

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