fugu Posted September 25, 2014 Share Posted September 25, 2014 Does anyone know the relationship between RSSI, EIRP, frequency, and distance for radio transmitions? I kinda have an idea but I'd like a verification. TYTYTY:) Quote Link to comment Share on other sites More sharing options...
cooper Posted September 26, 2014 Share Posted September 26, 2014 If you don't get any useful responses here, try asking the same question within the SDR subforum. Some really smart radio people reside there. Quote Link to comment Share on other sites More sharing options...
whitenoise Posted October 5, 2014 Share Posted October 5, 2014 I would say the EIRP is the actual radiated power by the antenna (sum of amplification gain and antenna gain minus cable loss) and the RSSI is what the receiver gets. So the RSSI will drop by increasing the range to the antenna. Because there is no information in the packet about the EIRP the calculation of the RSSI is a thing of its own (depending on the energy that is induced in the receiving antenna). Also the medium in which the signal travels takes influence depending on its grade to absorb the power of the signal (i.e. 2,4 GHz under water would be a bad idea :D ). In general low frequencies travel further than high frequencies (same conditions assumed - probably because high frequencies are more likely to interact with our terrestrial environment). Quote Link to comment Share on other sites More sharing options...
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