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The chirp spread spectrum technology (CSST) based system like long range (LoRa) wireless area network (WAN) is seen as a promising solution in emerging field of internet of things (IoT). It has advantages such as low power consumption, has no license requirement as it operates in free frequency bands and it can be easily integrated with energy saving sensor nodes. Devices compromising LoRa wireless nodes and the LoRa wireless gateway deliberated in most of the implementation schemes of LoRaWAN work on different frequency ranges. To improve the performance of these devices and to accommodate increasing demands of battery-operated devices, it is of great interest to analyze all these frequencies. In this paper, a comparison of LoRa nodes working with different frequencies of 433 MHz, 865 MHz and 915 MHz is carried out on the basis of their performance in terms of signal strength and energy requirements using MATLAB. Moreover, configuration parameters of LoRa nodes are modified to find the best possible solution for transmitting data over longer distances with least data packet loss for a field application of water quality parameter monitoring.
Alset et al. (Wed,) studied this question.
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