Portable Broadband Access and Chipset Development Challenges

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Portable Broadband AccessandChipset Development
Challenges

• Christian John
• Director, Personal Data Products
• ArrayComm, Inc. chrisj_at_arraycomm.com

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Agenda

• ArrayComm Background
• Intellicell Overview
• Portable Broadband Access Overview
• i-BURST System
• Chipset Design Challenges

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ArrayComm Background

• Acknowledged leader in commercially deployed
  adaptive smart antenna solutions . . . We Make
  Wireless Better
• Measurable Results
• Award winning PCS Wireless Local Loop Systems
• Products with 25 times more capacity 12 times
  more coverage
• More than 30,000 base stations deployed in over 5
  countries
• Strong patent portfolio
• Systems in development/trial stages
• 2.5G (GSM/GPRS/EDGE)
• 3G (W-CDMA)
• i-BURST (Personal Broadband Wireless Internet
  Access)

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ArrayComm Background
ArrayComm's IntelliCell processing platform
gathers RF information from multiple-element
antenna arrays and employs digital signal
processing techniques to instantaneously and
continuously optimize the receive and transmit
strategies of a wireless system. This technology
has the following advantages

• Improved signal quality,
• Increased capacity,
• Expanded coverage and range,
• Lower overall cost

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Smart Antenna Systems
Common Signal Processing Objectives
Original Signal
Optimally Enhanced
Enhanced Signal Level
Original Signal Level
(dB)
Original Interference Level
Reduced Interference
Noise Floor
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Smart Antenna Processing
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Smart Antenna Simulation Example Based on work
for PHS Two Co-channel Users
User 2
Co-channel PHS Users
Cell Station 2
Cell Station 1
User 1
PHS Cell Stations
Coverage Legend User 1 Coverage
User 2 Coverage Darker Shade Stronger
Signal

• Signal Quality Legend
• Acceptable
• Unacceptable
• No Service

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Adaptive-PHS Demonstration
Conventional PHS
User 2
Cell Station 1
Cell Station 2
User 1
IntelliCell-PHS
User 2
Cell Station 1
Cell Station 2
User 1
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Adaptive-PHS Demonstration
Conventional PHS
User 2
Cell Station 1
Cell Station 2
User 1
IntelliCell-PHS
User 2
Cell Station 1
Cell Station 2
User 1
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Adaptive-PHS Demonstration
Conventional PHS
User 2
Cell Station 1
Cell Station 2
User 1
IntelliCell-PHS
User 2
Cell Station 1
Cell Station 2
User 1
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Adaptive-PHS Demonstration
Conventional PHS
User 2
Cell Station 1
Cell Station 2
User 1
IntelliCell-PHS
User 2
Cell Station 1
Cell Station 2
User 1
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Adaptive-PHS Demonstration
Conventional PHS
User 2
Cell Station 1
Cell Station 2
User 1
IntelliCell-PHS
User 2
Cell Station 1
Cell Station 2
User 1
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Adaptive-PHS Demonstration
Conventional PHS
User 2
Cell Station 1
Cell Station 2
User 1
IntelliCell-PHS
User 2
Cell Station 1
Cell Station 2
User 1
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Adaptive-PHS Demonstration
Conventional PHS
User 2
Cell Station 1
Cell Station 2
User 1
IntelliCell-PHS
User 2
Cell Station 1
Cell Station 2
User 1
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Adaptive-PHS Demonstration
Conventional PHS
User 2
Cell Station 1
Cell Station 2
User 1
IntelliCell-PHS
User 2
Cell Station 1
Cell Station 2
User 1
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Adaptive-PHS Demonstration
Conventional PHS
User 2
Cell Station 1
Cell Station 2
User 1
IntelliCell-PHS
User 2
Cell Station 1
Cell Station 2
User 1
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Adaptive-PHS Demonstration
Conventional PHS
User 2
Cell Station 1
Cell Station 2
User 1
IntelliCell-PHS
User 2
Cell Station 1
Cell Station 2
User 1
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Portable Broadband AccessMarket

• Growth in Broadband Applications
  VPN, ASP, Games, Multimedia, etc.
• Lifestyles Require Connectivity (Internet,
  Mobile Phone, Messaging)
• Emerging industry focus on portable services
  (content, applications, broadband networks)

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Convergence Broadband, Wireless, Internet
Addressable Market 2.5 Billion Devices
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Portable Broadband AccessKeys To Success

• Huge Capacity to Deliver High Speed, Quality
  Service to All Customers at Mass Market Pricing
• Ubiquity, Freedom to Move, always on
• Internet/Open Architecture for Content and
  Services Killer Apps

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What is i-BURST ?
Wireless Modem Connectivity
Internet
VPN
PSTN
Chip Based IP Appliances
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i-BURST System Architecture
i-BURST Base Station
i-BURST Subscribers
i-BURST Wireless air interface
i-BURST Base Station
Internet
i-BURST Base Station
Existing wired Broadband access
Services
i-BURST radio infrastructure
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i-BURST Chipset Challenges

• Power consumption is key for portable devices
• Stringent transmit EVM requirements for
  Intellicell processing
• PA linearity
• LO phase noise
• Transmit adjacent channel power leakage
• PA linearity
• Receive adjacent channel selectivity
• Dynamic range

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i-BURST Chipset Challenges

• PA linearity for higher order modulations (QAM)
• PA efficiency can be as low as 20
• Power consumption and heat dissipation
• LO phase noise (slot to slot hopping)
• Switching PLLs
• DDS
• Wideband radio
• ADC/DAC power consumption (required bits of
  precision)
• DDS
• Wideband radio

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Intellicell Terminal

• Benefits
• Potential to realize increased link budget (PA
  and LNA)
• Asymmetric data rates (high downlink rate using
  diversity and interference mitigation)
• Challenges
• Increased design complexity

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Questions

• Thank You