Will the interference signal emitted by a mobile phone signal jammer interfere with the LoRa signal?

To determine whether a cell phone jammer will interfere with LoRa signals, we must first understand the nature of LoRa signals. LoRa is a low-power, long-distance LAN wireless standard created by Semtech. It is able to achieve long-distance communications while maintaining low power consumption, surpassing other wireless methods in range. LoRa signals operate at frequencies such as 433MHz, 868MHz, and 915MHz. Due to their low frequency and good diffraction characteristics, they can be transmitted 2-5 kilometers in urban environments.

Knowing the LoRa signal, we can now study the basic principles of cell phone signal jammers. Cell phone signal jammers emit white noise signals in the same frequency band as cell phone signals. In the area of ​​their use, the signal strength of this white noise is higher than that of cell phone signals, and can effectively block cell phone communications within their range. On the contrary, cell phone signal jammers cannot block cell phone signals outside their coverage area.

Considering the frequency bands used by LoRa signals and mobile jammers, we observed the following:

LoRa signal frequency band:

• 433MHz
• 868MHz
• 915MHz

Frequency band of signals emitted by mobile jammers:

• CDMA: 870-880MHz
• GSM: 930-960MHz
• DCS: 1805-1880MHz
• FDD: 1880-1920MHz
• TD-SCDMA: 2010-2025MHz
• WCDMA: 2110-2170MHz
• LTE1: 2300-2390MHz
• LTE2: 2515-2675MHz

Obviously, the frequency band of signals emitted by mobile jammers does not overlap with the frequency band used by LoRa signals. Therefore, mobile signal jammers do not interfere with the frequency band of LoRa signals, and the signals they emit do not disrupt LoRa communications.

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