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4G2-01 WiMAX vs. LTE Implications for Practical Device Applications

4G2-01 WiMAX vs. LTE Implications for Practical Device Applications. Paul Tornatta, CTO SkyCross Inc. January 20, 2010. Agenda. SkyCross Company Introduction LTE vs. WiMAX in North America Frequency Allocation Range loss User Platform Consideration Summary Conclusions. About Us.

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4G2-01 WiMAX vs. LTE Implications for Practical Device Applications

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  1. 4G2-01WiMAX vs. LTEImplications for Practical Device Applications Paul Tornatta, CTO SkyCross Inc. January 20, 2010

  2. Agenda • SkyCross Company Introduction • LTE vs. WiMAX in North America • Frequency Allocation • Range loss • User Platform Consideration • Summary • Conclusions

  3. About Us SkyCross is a global designer and manufacturer of one-stop antenna solutions for a variety of wireless devices • Founded in 2000 • Headquarters in Viera, Florida • Global Locations: China, Korea, Japan, Taiwan • Privately held with strong financial partners • Intel Capital • Investor Growth Capital: > $1B investments • TL Ventures: > $1.5B under management • 4-Yr Revenue Growth  55% CAGR • > 500 Employees • Strong IP Portfolio >140 Global Patents

  4. Markets Served Our multi-band/mode antennas enable increased functionality – voice, data, video, location, audio – in any wireless device without compromising style. Mobile Phones Networking Router/ Access Point Femtocell Smart Grid Handsets Smartphone AND MORE – our technology is versatile! Computing Personal/Home Entertainment USB dongle Personal Navigation Device Personal Media/Game Players PC Card Ultra-mobile PC Wireless Audio Home Entertainment Laptop

  5. 4G Frequency Allocations • LTE and WiMAX use similar modulation schemes and have similar spectral efficiency • WiMAX implementation in North America has a significant advantage in total bandwidth available to service a large number of customers

  6. Range Loss Comparison – 700 MHz vs. 2600 MHz • LTE in North America is implemented in the 700 MHz band • WiMAX is implemented in the 2600 MHz band • LTE has a significant advantage in coverage range and footprint over WiMAX dBm 750 MHz 2600 MHz

  7. MIMO Antenna Implementation Issues What works for 3G will not be good enough for 4G • MIMO antenna performance is greatly effected by device geometry • Handset geometries are small in terms of wavelength in the 700 MHz band making it difficult to implement MIMO antennas • Handset geometries are larger in terms of wavelength at 2600 MHz making MIMO antenna implementation more practical Freespace Wavelength at 750 MHz ~ 400 mm Maximum Dimension Resonance = 1150 MHz w=60 mm L=110 mm Freespace Wavelength at 2600 MHz ~ 115 mm

  8. Simulation - 700 MHz MIMO Handset Antenna Implementation Efficiency: 30-40% VSWR: <2:1 Patterns almost identical CC: >0.8 Coupling: -4dB

  9. Simulation - 700 MHz MIMO Handset Antenna Implementation – Isolated Mode Technique Efficiency 50-58% VSWR <2.2:1 CC: <0.35 Isolation: <-13 dB Significantly different patterns results in low envelope correlation coefficient

  10. Summary / Conclusions • LTE 700 is capacity limited for a given data rate • WiMAX at 2.6 GHz is range limited for a given data rate • 700 MHz MIMO handset antenna implementation requires specialized techniques • WiMAX and LTE each have benefits and drawbacks • WiMAX and LTE will likely coexist each filling particular needs for data rates, coverage and capacity What works for 3G will not be good enough for 4G

  11. Thank You!

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