exploring_lora
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exploring_lora [2018/09/23 14:17] – [2. Software Tools] samer | exploring_lora [2018/09/27 10:33] – samer | ||
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Download the following software on your PC: | Download the following software on your PC: | ||
* RadioHead: The Packet Radio library for embedded microprocessors can be downloaded from [[http:// | * RadioHead: The Packet Radio library for embedded microprocessors can be downloaded from [[http:// | ||
- | * Arduino IDE: Specific OS versions can be downloaded from [[https:// | + | * Arduino IDE: Specific OS versions can be downloaded from [[https:// |
Unzip the RadioHead library and copy it to your sketchbook library folder as detailed in [[https:// | Unzip the RadioHead library and copy it to your sketchbook library folder as detailed in [[https:// | ||
+ | |||
+ | <WRAP center round tip 75%> | ||
+ | Note well the location of the library folder on your computer. In the following, you will be required to modify source files located in this folder. | ||
+ | </ | ||
===== -. Installation ===== | ===== -. Installation ===== | ||
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For Arduino Mega 2560, additional drivers for Microsoft Windows can be installed from [[http:// | For Arduino Mega 2560, additional drivers for Microsoft Windows can be installed from [[http:// | ||
</ | </ | ||
+ | |||
+ | ===== -. Theoretical Analysis ===== | ||
+ | |||
+ | In this section, you will perform a theoretical assessment of the performance of LoRa modulation. You will later compare this theoretical results to the experimental ones as in a typical scientific study. | ||
+ | |||
+ | <WRAP left round help 100%> | ||
+ | * What is the relation between processing gain and spreading factor in LoRa modulation? Explain. | ||
+ | * How does the spreading factor impact the coverage of a LoRa transmitter? | ||
+ | * For each of the three possible configurations of your LoRa module, what is the transmission bit rate? Explain your computation. | ||
+ | * Compute the receiver sensitivity, | ||
+ | * Compare the computed sensitivity to that provided by the {{ : | ||
+ | </ | ||
+ | |||
===== -. Running Basic Sketches ===== | ===== -. Running Basic Sketches ===== | ||
Start by setting the central frequency of the LoRa modules. For this, open the '' | Start by setting the central frequency of the LoRa modules. For this, open the '' | ||
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[{{ : | [{{ : | ||
[{{ : | [{{ : | ||
+ | |||
===== -. Modifying the Radio Parameters ===== | ===== -. Modifying the Radio Parameters ===== | ||
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</ | </ | ||
- | <WRAP left round help 100%> | + | In the remainder |
- | * What is the relation between processing gain and spreading factor in LoRa modulation? Explain. | + | |
- | * How does the spreading factor impact the coverage | + | |
- | * For each of the three possible configurations of your LoRa module, what is the transmission bit rate? Explain your computation. | + | |
- | * Compute | + | |
- | * Compare the computed sensitivity to that provided by the {{ : | + | |
- | </ | + | |
- | In the remainder of this lab, you will conduct measurements to validate the obtained theoretical receiver sensitivity. | ||
===== -. Performance Evaluation ===== | ===== -. Performance Evaluation ===== | ||
- | In the following, you will design and implement a set of scenarios that enable to evaluate the performance of the LoRa modulation. As you will deal with scientific assessment, you are required to use scientific tools to show the results. You have the choice between [[http:// | + | In the following, you will design and implement a set of scenarios that enable to evaluate the performance of the LoRa modulation. As you will deal with scientific assessment, you are required to use scientific tools to show the results. You have the choice between [[http:// |
- | ==== -. Round Trip Time ==== | + | |
+ | ==== -. Time on Air ==== | ||
- | In this section, you will measure the Round Trip Time of LoRa communication | + | In this section, you will measure the Time on Air (ToA) under the three different radio configurations |
<WRAP center round help 100%> | <WRAP center round help 100%> | ||
- | * Draw a box plot of the RTT under the three different radio configurations. | + | * Draw a box plot of the ToA under the three different radio configurations |
* Analyze the obtained results and compare with the theoretical computations. | * Analyze the obtained results and compare with the theoretical computations. | ||
</ | </ | ||
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* What type of mathematical models enables to theoretically compute the PER? | * What type of mathematical models enables to theoretically compute the PER? | ||
</ | </ | ||
+ | |||
==== -. Coverage ==== | ==== -. Coverage ==== | ||
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In order to compute distances in your experiment, you can get the GPS coordinates as recorded by your smartphone using an application such as [[https:// | In order to compute distances in your experiment, you can get the GPS coordinates as recorded by your smartphone using an application such as [[https:// | ||
+ | ===== -. Coverage Challenge ===== | ||
+ | |||
+ | |||
===== -. Grading ===== | ===== -. Grading ===== | ||
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^ Design experiments | ^ Design experiments | ||
^ Analyse results | ^ Analyse results | ||
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exploring_lora.txt · Last modified: 2021/10/20 12:52 by samer