Sökning: "RF backscatter"

Hittade 4 uppsatser innehållade orden RF backscatter.

  1. 1. Assessing the accuracy for area-based tree species classification using Sentinel-1 C-band SAR data

    Master-uppsats, SLU/Dept. of Forest Resource Management

    Författare :Alberto Udali; [2019]
    Nyckelord :Sentinel-1; tree species; random forest; linear discrimi-nant analysis; classification;

    Sammanfattning : Forest type (FTY) and tree species classification (SPP) over the Remn-ingstorp test site were performed using ground-based field observations and remote sensing data sources. The field inventory for the forest estate and for the surrounding natural reserve of Eahagen was carried out in 2016. LÄS MER

  2. 2. Battery-free Visible Light Sensing

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Avdelningen för datorteknik

    Författare :Andreas Soleiman; [2019]
    Nyckelord :Networked embedded systems; Visible light sensing; RF backscatter; Energy harvesting;

    Sammanfattning : In this thesis, we show that it is possible to design a battery-free light sensing system that can sense and communicate hand gestures while operating fully on harvested power from indoor light. We present two main innovations that push our system to tens of microwatts of power to enable battery-free operation. LÄS MER

  3. 3. Towards Long-Range Backscatter Communication with Tunnel Diode Reflection Amplifiers

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Fasta tillståndets elektronik

    Författare :Gustav Eriksson; [2018]
    Nyckelord :Amplified backscatter tag; Reflection amplifier; Battery-free; Long-range communication; Tunnel diode; Ultra-low power consumption; RFID; Frequency shift;

    Sammanfattning : Backscatter communication enables wireless communication at a power consumption orders of magnitude lower than conventional wireless communication. Instead of generating new RF-signals backscatter communication leverages ambient signals, such as WiFi-, Bluetooth- or TV-signals, and reflects them by changing the impedance of the antenna. LÄS MER

  4. 4. Radio Link Quality in Backscatter Communication

    Master-uppsats, Uppsala universitet/Institutionen för informationsteknologi

    Författare :Georgios Theodoros Daglaridis; [2018]
    Nyckelord :;

    Sammanfattning : The opportunities that the Internet of Things (IoT) offers impose the need of ultra low-power communication systems. For that, backscatter communication can be used, where the transmitting node consumes only a few tens of micro Watts. LÄS MER