Since we are starting from an example, we need to determine the overall scheme and relevant specifications. Based on this, we must design each module according to the workflow and determine the matching connection methods between them. This example begins processing from the intermediate frequency (IF) signal sampling. Following the mature scheme of the receiver, … Read more
This week’s exercises were mainly focused on exercise6.8 which got me stuck. Initially, I followed the author’s approach and derived the formula for a long time, but later realized that the formula was too complex to yield specific values. After getting stuck, I paused for a few days, and when I picked it up again … Read more
LoRa is a wireless network standard based on linear modulation. Linear Modulation: Linear modulation represents “compressed high-intensity radar pulses,” which is a signal whose frequency increases or decreases over time. It is commonly used in sonar and radar, and is also prevalent in spread spectrum technology. Linear Frequency Modulation Spread Spectrum: Linear frequency modulation spread … Read more
In the late 19th century, humanity invented the wireless telegraph, thus beginning the exploration of the wireless world. The wireless telegraph machines of the time used a spark-gap transmitter, primarily to transmit Morse code. Early wireless telegraph machines, with the Morse code design in the lower left corner This telegraph machine could not receive and … Read more
When we talk about “LoRa”, we are not referring to the beautiful “Lara” from Tomb Raider… LoRaWAN is a low-power wide-area network specification launched by the LoRa Alliance. This technology can provide a regional, national, or global network for battery-powered wireless devices. LoRaWAN targets some core needs in the Internet of Things (IoT), such as … Read more