Baseband and Analog RF Research

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Baseband and Analog RF Research

• Chinh Doan
• Robert W. Brodersen
• University of California, Berkeley

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Current BARF Radio Projects

• WCDMA with MUD
• 31 chips/symbol DS-SS
• 25 MHz chip rate
• Downlink supports 1.6 Mb/s
• Direct-conversion receiver
• Target power 100 mW for analog front-end
• TCI
• 15-20 users, 64 kb/s/user
• Requires up/downlink, peer-to-peer
• Reuse WCDMA analog front-end

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WCDMA Basestation Transmitter
System specs Johan Vanderhaegen
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WCDMA Mobile Receiver
System specs Dennis Yee
Dennis Yee
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WCDMA Mobile Receiver
System specs Dennis Yee
Brian Limketkai
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WCDMA Mobile Receiver
System specs Dennis Yee
Chinh Doan
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WCDMA Mobile Receiver
System specs Dennis Yee
David Sobel
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Upcoming BARF Radio Projects

• UWB Radio
• Low, scalable bit rate (100 b/s 10 kb/s)
• Flexible communications (Broadcast, peer-to-peer,
  etc.)
• Localization ability
• Target power lt 1 mW
• PicoRadio
• Around 10 kb/s
• Short range transmission (1-5 m)
• 1 duty cycle for analog front-end
• Target power lt 1 mW average power consumption

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Challenges for UWB

• Noise and interference
• FCC compliance
• Power consumption of fast/wideband front end
• Efficient pulse generation
• Pulse reception (with dispersion)
• Antenna design (2D, integrated, cheap)
• Synchronization, clock generation
• System simulation issues
• Whos working on it
• Ian ODonnell (everything)
• Sayf Alalusi (Antenna-filter-LNA codesign)

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Challenges for PicoRadio

• Main driving specification Power consumption
• Simplest RF processing to reduce power
• Short bursts of data, long sleeping periods
• Fast settling PLLs
• CDMA/OFDM complexity comparison
• Whos working on it
• Isabelle Telliez (analog RF front-end)
• Joel Cambonie (digital baseband processing)