Any RSSI value lower than -80 dBm is considered poor signal strength. If you want to check it to be certain, find the MCS-index and look it up:Ĩ02.11n datarates are based on a number of factors (MIMO,GI,20 vs 40 MHz etc.), hence the MCS-index. The relationship b/w RSSI and Distance is : Where: Fm Fade Margin - N Path-Loss Exponent, ranges from 2.7 to 4. RSSI measures the strength of a radio signal. key of ranging and positioning technologies in wireless sensor networks. 300: it is probably because of GI (Guard Interval), using a shorter guard interval will give higher troughput, but it's usually turned off -> probably because of compatibility. In this paper, it is found that the variance of RSSI value changes along with. Note: RSSI is a percentage and not a linear representation of how many dBm is actually reaching the card. RSSI (Recieved Signal Strength Indicator) is a more common name for the Signal value meaning it is the strength that the device is hearing a specific device or signal.RSSI is most common used in bridge links where on client laptops they just call it Signal. For reference: 0 - No connectionģ00 - 802.11n on 5.0 Ghz (Normally I see this connect at 270 for some reason) The number to pay much more attention to is the Transmit Rate - the transmit rate will drop if you have too much noise or interference or if you are too far away from the base station. Abstract: Device-free localization (DFL) is the technology. My laptop which I can roam around the house with never goes lower than -60 and never higher than -51. An Experimental Study of Human Movement Effects on RSSI Levels in an Indoor Wireless Network. Currently my iMac is 20 feet (line of sight) from my wireless base station and fluctuates between -57 and -58 and is connected at full speed. Generally the higher (closer to 0) the better, and the closer to -100 the worse. RSSI or received signal strength indication can go from 0 to -100 (for Apple - other vendors can measure it differently as RSSI has no stated units.
0 kommentar(er)
