[WISPA] formulas behind pathloss+RSSI calculators?
I'm looking for the math behind this website http://www.distributed-wireless.com/calculators/pathloss_RSSI.html I know the free space loss calculation (20 * Log10 (frequency in MHz) + 20 * Log10 (Distance in Miles) + 36.6), but what is the connection between that and the RSSI at that distant point? WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
Re: [WISPA] formulas behind pathloss+RSSI calculators?
Tx power + antenna gain - free space path loss + rx antenna gain =rssi. - Original Message - From: Rogelio [EMAIL PROTECTED] To: WISPA General List wireless@wispa.org Sent: Wednesday, July 16, 2008 5:24 PM Subject: [WISPA] formulas behind pathloss+RSSI calculators? I'm looking for the math behind this website http://www.distributed-wireless.com/calculators/pathloss_RSSI.html I know the free space loss calculation (20 * Log10 (frequency in MHz) + 20 * Log10 (Distance in Miles) + 36.6), but what is the connection between that and the RSSI at that distant point? WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
Re: [WISPA] formulas behind pathloss+RSSI calculators?
Chuck McCown - 3 wrote: Tx power + antenna gain - free space path loss + rx antenna gain =rssi. Perfect, thanks. I thought I was missing something different. WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
Re: [WISPA] formulas behind pathloss+RSSI calculators?
Assuming adequate FZ clearance, then (EIRP) - (FSPL) + (RX Ant System Gain) = RSSI Rogelio wrote: I'm looking for the math behind this website http://www.distributed-wireless.com/calculators/pathloss_RSSI.html I know the free space loss calculation (20 * Log10 (frequency in MHz) + 20 * Log10 (Distance in Miles) + 36.6), but what is the connection between that and the RSSI at that distant point? WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ -- Jack Unger - President, Ask-Wi.Com, Inc. Serving the Broadband Wireless Industry Since 1993 Cisco Press Author - Deploying License-Free Wireless WANs Vendor-Neutral Wireless Design-Training-Troubleshooting-Consulting FCC License # PG-12-25133 Profile http://www.linkedin.com/in/jackunger Phone 818-227-4220 Email [EMAIL PROTECTED] WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
Re: [WISPA] formulas behind pathloss+RSSI calculators?
Here is an example. TX power of 30 dBm (1 watt) + 10 dB antenna gain = 40 dBm EIRP - Path loss (say 10 miles at 915 MHz) 116 dB + 10 dB RX antenna gain = -66 dBm RX signal level - Original Message - From: Chuck McCown - 3 [EMAIL PROTECTED] To: [EMAIL PROTECTED]; WISPA General List wireless@wispa.org Sent: Wednesday, July 16, 2008 5:31 PM Subject: Re: [WISPA] formulas behind pathloss+RSSI calculators? Tx power + antenna gain - free space path loss + rx antenna gain =rssi. - Original Message - From: Rogelio [EMAIL PROTECTED] To: WISPA General List wireless@wispa.org Sent: Wednesday, July 16, 2008 5:24 PM Subject: [WISPA] formulas behind pathloss+RSSI calculators? I'm looking for the math behind this website http://www.distributed-wireless.com/calculators/pathloss_RSSI.html I know the free space loss calculation (20 * Log10 (frequency in MHz) + 20 * Log10 (Distance in Miles) + 36.6), but what is the connection between that and the RSSI at that distant point? WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
