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Kyp Diamantides edited this page Apr 23, 2019 · 5 revisions

Welcome to the 18WSD030-Advanced-Project wiki!

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18WSD030-Advanced-Project

Repository for my MEng Advanced Project.

Diversity Techniques for riverside Wireless Sensor Nodes over Software Defined Radios

Project Description

This project will investigate the effectiveness of multiple antennas on wireless sensor nodes to improve radiofrequency reliability. Different diversity techniques will be investigated, and a suggestion as to which is the most suitable will be made. During the project, the student will model and measure a multiple input single output system. Firstly in a lab and secondly outdoors. The platform used will be software defined radios.

Project Aim

To measure the effectiveness of using multiple antennas on sensor nodes close to, and upon water using software defined radios.

Project Progress

Set up test

  1. Carrier Wave detection Rx Target with Host interface

FM SISO

  1. FM audio Tx Target (SISO)
  2. FM audio Rx Target and Host

FM SIMO

  1. FM audio Rx Target and Host SIMO

LoRa (beyond project aim - further progress)

  1. LoRa Rx on Target and Host with fosphor (waterfall)
  2. LoRa Tx on Target using Host generated IQ
  3. Arduino code for LoRa32 v2 Tx and RX
  4. LoRa Tx and Rx now works for targets and host - decoding not always successful

Experimental setup

  1. Created three antenna mounts to test spatial and polarisation diversity
  2. Data collected has also been included for completion

Usage instructions

The majority of the code developed for this project was done in GNU Radio companion and python. To use the above code, you will need to install GNU Radio it the Ettus USRP dependancies.

GNU Radio is a free and open-source software development toolkit that provides signal processing blocks to implement software radios. GNU Radio can be installed by following the instructions here (https://wiki.gnuradio.org/index.php/InstallingGR).

If you are looking to implement the code using hardware (SDRs), you will have to install the appropriate libraries. The above code was developed to be used on the Ettus E310 USRP using the UHD library from Ettus (https://files.ettus.com/manual/page_build_guide.html).

After installing the required dependencies (explained above), you can download or clone the repository to your host machine. The file structure is simple. Code for Targets (SDRs) can be found in the /Targets folder. Please note that in my case the Target/1 is my Rx and Target/2 is my Tx. The differences between the two folders should be minimal.

The /Host_Examples folder includes all the code written for the host computer. Host code will usually involve some kind of GUI for either real-time viewing of the data coming in or for controlling the setup or both. The GUI applications can be demanding, so my recommendation is to either use a Rasberry Pi or any other mid to high range computer running a recent version of Ubuntu. Using VMs can usually complicate things but haven't tested it.

I am not sure if I will keep maintaining this after the end of the project but if any alterations are made they will be indicated here.

Clone this wiki locally