Changes between Version 38 and Version 39 of Other/Summer/2024/pD


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Timestamp:
Aug 6, 2024, 4:52:45 PM (4 months ago)
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sdas21
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  • Other/Summer/2024/pD

    v38 v39  
    33**WINLAB Summer Internship 2024**\\
    44**Group Members:** Sam-Fone Cheung, Shriya Das, Aly Mustafa, Xiang Meng\\
    5 **Advisor:** Aggelos Bletsas
     5**Advisors:** Dr. Aggelos Bletsas, Dr. Richard Howard
    66
    77
    … …  
    1111Our group expanded this work to use temperature sensors or thermistors on plants which transmit information using backscatter techniques. These sensors will be battery-less and low-cost as they harvest ambient radio frequency (RF) energy.
    1212
    13 Over the summer, our team split into two groups to build the transmitter and receiver, ultimately converging.
     13Over the summer, our team split into two groups to build the transmitter and receiver, ultimately converging. Here is our code for the receiver: [https://github.com/Autoraem/PlantDoctor GitHub]
    1414
    1515
    … …  
    5555[[Image(Periodogram.png, 700px, align=center)]]
    5656
    57 https://github.com/Autoraem/PlantDoctor
    58 Currently, this system is a periodogram estimator. This system first removes the DC offset (subtract the mean of the signal in each frame) then applies a FFT to the input signal with a Blackman-Harris windowing function. This returns a frequency spectrum. There will also be a CFO (carrier frequency offset) that will be removed by subtracting the max of the frequency spectrum and shifting all FFT values over. Afterwards, two separate bandpass filters are applied only allowing the region of interest (+/- 100kHz-200kHz) to show. Then we find peaks in this region which then becomes our estimate. To remove the effect from noise, we perform an averaging function.
     57
     58Currently, our system is a periodogram estimator. It first removes the DC offset (subtracts the mean of the signal in each frame) and then applies an FFT to the input signal with a Blackman-Harris windowing function. This returns a frequency spectrum. There will also be a CFO (carrier frequency offset) that will be removed by subtracting the max of the frequency spectrum and shifting all FFT values over. Afterwards, two separate bandpass filters are applied only allowing the region of interest (+/- 100kHz-200kHz) to show. Then we find peaks in this region which then becomes our estimate. To remove the effect from noise, we perform an averaging function.
    5959
    6060We still need to do temperature interpolation and improve SNR and BER.
     61
     62
    6163==== WEEK SIX ====
    6264[https://docs.google.com/presentation/d/1IVHxp37dLoeeXByd_AVcU_r4t5fZpaF5VpObRvP3WJ0/edit?usp=sharing Weekly Presentation]\\
    … …  
    7476We also did a live demo!
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     78
    7679==== WEEK EIGHT ====
    7780[https://docs.google.com/presentation/d/1HmM73QaN0rC-FQ9eomNmFzX3bV5ZxUyMjUdE_epnreo/edit?usp=sharing Weekly Presentation]\\
    … …  
    8083[[Image(Plant Week 8 .png, 425px, align=center)]]
    8184
     85
    8286==== WEEK NINE ====
    8387[https://docs.google.com/presentation/d/1LHRwIVJcsXC6uEPopnxCzAwehbN2e5Lufwh47mqo_go/edit?usp=sharing Weekly Presentation]\\
    8488//Progress: //
    85 
    86 
    8789We start work on digital sensors and digital transmission and demodulation.
    8890
    8991
    90 This week, we received basic controls for the plant chamber such as a temperature controller, LED grow lights, and humidity sensors. We still need to determine a method to control the humidity such as using a dehumidifier & humidifier or a saturated salt solution. Without these humidity controls, the excessive humidity within the ORBIT room led to growth of harmless fungi in the plant's soil.
     92This week, we received basic controls for the plant chamber such as a temperature controller, LED grow lights, and humidity sensors. We still need to determine a method to control the humidity such as using a dehumidifier & humidifier or a saturated salt solution. Without these humidity controls, the excessive humidity within the ORBIT room led to the growth of harmless fungi in the plant's soil.
    9193[[Image(Plant Chamber.png, 350px, align=center)]]
    9294
     95
    9396==== WEEK TEN ====
    94 [https://docs.google.com/presentation/d/1hLqbTcdPJTugqhbaQiwvGx0-oBIqWJHn1wkJphVwx0E/edit?usp=sharing Final Presentation]
    95 //Progress: //
     97[https://docs.google.com/presentation/d/1hLqbTcdPJTugqhbaQiwvGx0-oBIqWJHn1wkJphVwx0E/edit?usp=sharing Final Presentation]\\
     98[[Image(Plant Doctor WINLAB Poster.pptx.png, 1100px, align=center)]]
    9699
     100
     101== Acknowledgements ==
     102
     103We would like to thank Dr. Aggelos Bletsas and Dr. Richard Howard for their invaluable guidance throughout this summer. We would also like to thank Jennifer Shane, Ivan Seskar, and the rest of the WINLAB faculty for this opportunity.
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