UHF/VHFEnergy Harvesting Radio System Physical and MAC Layer Consideration

VHF/UHF Energy Harvesting Radio Systems PHY/MAC Layer Considerations Xiaohu Zhang Graduate Committee: William B. Kuhn Bala Natarajan Don Gruenbacher May 2009

Outline ,[object Object],[object Object],[object Object]

Outline ,[object Object],[object Object],[object Object],[object Object],[object Object]

Wireless Sensor Node & Existing Research ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Challenges of Future Wireless Sensor Node ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Solution for the Challenges of Wireless Sensor Node ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Low Data Rate Long Distance Energy Harvesting Radio (EHR)

R&D of EHR ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

RF Link Budget ,[object Object],[object Object],[object Object]

e.g. RF Link Budget ,[object Object],[object Object],[1] White Paper on Energy Harvesting Radio Transceivers, William B. Kuhn, 2007

Propagation Measurement ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Propagation Measurement ,[object Object],Agilent N9320 spectrum analyzer services as a receiver with the antenna 10mw transmitter Directional & Monopole antennas ,[object Object],[object Object]

Antennas S11--902MHz & 2400MHz

Propagation & Path-loss Exponent Measurement Results ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Comparison of Four Frequency Propagation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Satellite view of the test path

K-State Energy Harvesting Radio prototype Table 2‑1 Demo board Electrical Specification

Energy Harvester and Storage ,[object Object],[object Object],[object Object],[object Object]

Duty cycle 1.1%--- 4MHz Clock Speed Design

Lab Test Figure-A 4 burst clusters with 1% duty cycle Figure-B 1 active period : command & data signal Figure-C 5 burst data Figure-D 433MHz modulation signal

Outdoor Test ,[object Object],[object Object],[object Object],[1] White Paper on Energy Harvesting Radio Transceivers, William B. Kuhn, 2007 (a) (b) (c)

Implementation of solution ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],IEEE802.15.4 PHY Study

IEEE802.15.4 Synchronization Study ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

IEEE802.15.4 Sync CANNOT Work for EHR Systems ,[object Object],[object Object],[object Object]

EHR Synchronization solution (1) pure-EHR network ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

EH Radio Synchronization solution(1) pure-EHR network ,[object Object],[object Object],[object Object],[object Object],Table 4-3 Sync time and power consumption comparison of EH radio and IEEE802.15.4 standard radio (*The active duration voltage drop is calculated by using equation (2.3) and assume active/inactive current are 20.5mA and 0.06mA, these number came from Chapter 2, Duty Cycle Design, section “Low CPU Clock, Hardware control TX”) Figure 4-10 EH Radio Sync time versus Duty cycle

EH Radio Synchronization solution (2) Hybrid-EHR network ,[object Object],[object Object],[object Object],[object Object]

EH Radio Synchronization solution (2) Hybrid-EHR network ,[object Object],[object Object],[object Object]

EHR Recevier PHY DSP Development ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

PHY DSP Test ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

PHY DSP Test (continue) ,[object Object],[object Object],[object Object]

Shrink PHY package size---by shortening Preamble Length Figure 4‑13 SOF detection with various preamble Length ,[object Object],[object Object],[object Object],1 2 ,[object Object],[object Object],[object Object],[object Object],[object Object]

Preamble Length vs. Energy consumption-result Figure 4‑14 Energy Consumption VS. Preamble Length ,[object Object],[object Object],[object Object],[object Object]

Summary & Challenges ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

UHF/VHFEnergy Harvesting Radio System Physical and MAC Layer Consideration

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