exploring_lora
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exploring_lora [2018/10/06 13:52] – [3.1. Modifying the Radio Parameters] samer | exploring_lora [2018/10/10 06:16] – [2. Theoretical Study] melhem | ||
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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 |
</ | </ | ||
===== -. Theoretical Study ===== | ===== -. Theoretical Study ===== | ||
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- | * What is the relation between processing gain and spreading factor in LoRa modulation? | + | * What is the relation between processing gain and spreading factor in LoRa modulation? |
* How does the spreading factor impact the coverage of a LoRa transmitter? | * How does the spreading factor impact the coverage of a LoRa transmitter? | ||
* What is the transmission bit rate for each of the following configurations of your LoRa device? Explain your computation. | * What is the transmission bit rate for each of the following configurations of your LoRa device? Explain your computation. | ||
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==== -. Running Basic Sketches ==== | ==== -. Running Basic Sketches ==== | ||
- | Now you can compile and upload the client and server sketches on the two arduino devices, respectively. On the serial interfaces, you should obtain similar results as in Fig. 2 and Fig. 3. The client sends periodically a short message | + | Now you can compile and upload the client and server sketches on the two arduino devices, respectively. On the serial interfaces, you should obtain similar results as in Fig. 2 and Fig. 3. The client sends periodically a short packet |
[{{ : | [{{ : | ||
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==== -. Time on Air ==== | ==== -. Time on Air ==== | ||
- | In this section, you will measure the Time on Air (ToA) that is given by the time necessary to transmit a message | + | In this section, you will measure the Time on Air (ToA) that is given by the time necessary to transmit a packet |
- | Start by implementing a function on the client that measures the time necessary for sending a message. For example, you can use the [[https:// | + | Start by implementing a function on the client that measures the time necessary for sending a packet. You can have recourse to the [[https:// |
+ | |||
+ | For example, the scenario for assessing the impact of the spreading factor on the ToA consists of sending 100 packets for three different spreading factors //e.g.,// 7, 9, and 10, and drawing the average ToA or the distribution in a boxplot for comparing the results. | ||
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The setting for this experiment is unique: | The setting for this experiment is unique: | ||
- | |||
* Only one server is required in the classroom. This server should compute the ratio of successfully delivered packets or PDR. | * Only one server is required in the classroom. This server should compute the ratio of successfully delivered packets or PDR. | ||
* All groups are required to use the same frequency, spreading factor, and coding rate. | * All groups are required to use the same frequency, spreading factor, and coding rate. | ||
- | * On each client, packets will be generated following a Poisson process with the same average arrival rate for all groups. | + | * The average |
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* Provide the expression of the link budget and compute the received power using two different pathloss models. | * Provide the expression of the link budget and compute the received power using two different pathloss models. | ||
* Compare the received power obtained experimentally with the theoretical results. | * Compare the received power obtained experimentally with the theoretical results. | ||
- | * Write an article (blog, wiki, ...) to describe your experiment. | + | * Prepare a short presentation |
+ | </ | ||
+ | |||
+ | <WRAP center round important 75%> | ||
+ | This challenge and the corresponding grading is considered as a part of the final project. | ||
</ | </ | ||
===== -. Grading ===== | ===== -. Grading ===== | ||
- | | ^ Exemplary | + | | |
- | ^ Answer | + | ^ Techniques for Engineering Practice |
- | ^ Design experiments | + | ^ Skills for Engineering Practice |
- | ^ Analyse results | + | ^ Engineering tools | Students showed advanced ability |
+ | ^ Problem solving | ||
+ | ^ Results and analysis | ||
+ | ^ Motivation, initiative, and creativity | ||
+ | ^ Written communication skills | ||
+ | ^ Scientific referencing |
exploring_lora.txt · Last modified: 2021/10/20 12:52 by samer