Just leave the line blank if you are feeling lazy. Transmit Power This can be located on the specification sheet from your wireless system. Antenna Gain Select a RadioLabs antenna from our product page and enter the antenna gain.
This a very idealised calculation and in practice everything interferes with the signal but it will give you a reasonable approximation of the actual loss over distance. For more info on M. Fresnel and his theories go here. Enter the Total link distance in Miles or Kilometers , if you do not enter an Obstacle distance in Miles or Kilometers the calculator will use the mid-point for all calculations Note: assumes antennas at same height.
Finally enter the system Frequency in MHz and then click the 'Calculate' button. If both are left blank it will calculate a symmetrical antenna gain. Its buried somewhere in your radio spec and will be typically in the range of to dBm. Thank you for your help in advance. Posted 4-Nov pm iCuttlas. Posted 1-Jan pm Shailk. Posted Feb pm Member OriginalGriff Feb am. Two things: 1 While I applaud your urge to help people, it's a good idea to stick to new questions, rather than 7 year old ones. After that amount of time, it's unlikely that the original poster is at all interested in the problem any more!
Answering old questions can be seen as rep-point hunting, which is a form of site abuse. The more trigger happy amongst us will start the process of banning you from the site if you aren't careful. Stick to new questions and you'll be fine. Since most devices are in the plane or slightly above or below it, you get a "better signal" through most of the used environment that way that you would with a "globular" signal.
So the Db measurement is not the only thing you'd need - you'd need the vertical angle as well. Add your solution here. OK Paste as. Treat my content as plain text, not as HTML. Existing Members Sign in to your account. This email is in use. Do you need your password? Submit your solution! When answering a question please: Read the question carefully. Understand that English isn't everyone's first language so be lenient of bad spelling and grammar. If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem.
Insults are not welcome. Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question. Let's work to help developers, not make them feel stupid. Related Questions. How to calculate hausdorff distance in pixel between two 3D arrays in Python? Actually it's a small project for myself. I need to know how to calculate distance between client and access point using RSSI.
I have signal strength in db, as an example db, but I don't know how to find the distance. I need a sample code. Many thanks. Posted 6-Jul am aghorbanmehr. Add a Solution. HI I have the same problem , have you solved it. Top Rated Most Recent. Accept Solution Reject Solution. Can it tell you the distance? RSSI is received signal strength indicator. This will only ever be db measurement which could also subject to the Fresnel effect by lots of things, walls, windows e.
There are interference issues such as microwaves e. If you want to estimate accurately you actually have quite a complete calculation. The following is an example website which does this calculation. Taking a scientific approach would measure the db at various distances and plot a strength v distance curve and then create formula which closely follows the curve. Personally I think you need a mathematician to explain the calculation before working on the code.
The alternate option which considering time spent might actually be cheaper, would be to by a GPS locator. Posted 6-Jul am Stephen Hewison. Thank you for your answer. I know everything about complexity of this calculation and I Have read a lot of articles about it. A lot of articles full of complex mathematical calculations that I couldn't understand them. But I think I should calculate the distance in an ideal situation, I mean a building without any interference and noises.
I should place three access points in 1,6 and 11 channels in three different places of this area. Then my application should be installed on a laptop and it should indicates the place of the laptop approximately. I'm trying to find an algorithm or sample code that calculates this distance.
Member Sep pm. Hi,how about your project goes these days?
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