exploring_lora
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exploring_lora [2018/09/30 10:28] – [3.1. Modifying the Radio Parameters] samer | exploring_lora [2018/10/04 17:43] – [2. Theoretical Study] melhem | ||
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* What is the relation between processing gain and spreading factor in LoRa modulation? Explain. | * 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? | * How does the spreading factor impact the coverage of a LoRa transmitter? | ||
- | * For each of the three possible | + | * What is the transmission bit rate for each of the following |
+ | * Configuration 1: channel bandwidth = 125 kHz, spreading factor = 7, coding rate = 4/5. | ||
+ | * Configuration 2: channel bandwidth = 500 kHz, spreading factor = 7, coding rate = 4/5. | ||
+ | * Configuration 3: channel bandwidth = 125 kHz, spreading factor = 12, coding rate = 1/2. | ||
* Compute the receiver sensitivity, | * Compute the receiver sensitivity, | ||
* Compare the computed sensitivity to that provided by the {{ : | * Compare the computed sensitivity to that provided by the {{ : | ||
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Download the {{ : | Download the {{ : | ||
- | Take a look at the source code in '' | + | Take a look at the source code in '' |
* Central frequency | * Central frequency | ||
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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 on the radio interface . You will assess the impact of the spreading factor, bandwidth, coding rate, and message size on the ToA. | + | In this section, you will measure the Time on Air (ToA) that is given by the time necessary to transmit a message on the radio interface. You will assess the impact of the spreading factor, bandwidth, coding rate, and message size on the ToA. |
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 message. For example, you can use the [[https:// | ||
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In this section, you will measure the coverage of LoRa under different radio configurations. | In this section, you will measure the coverage of LoRa under different radio configurations. | ||
- | Start by identifying a set of five geographical locations or Test Points (TP). These TPs should be astutely chosen to explore the limits of LoRa coverage. Then, you should implement a function on the server that measures the ratio of successfully delivered packets or PDR. Now, you should run the experiment for three different radio configurations: | + | Start by identifying a set of five geographical locations or Test Points (TP). These TPs should be astutely chosen to explore the limits of LoRa coverage. Then, you should implement a function on the server that measures the ratio of successfully delivered packets or PDR (Packet Delivery Ratio). Now, you should run the experiment for three different radio configurations: |
<WRAP center round help 100%> | <WRAP center round help 100%> |
exploring_lora.txt · Last modified: 2021/10/20 12:52 by samer