"app to measure signal strength"

[abhishek prasadshaw]

Sir/Madam
  I would like to know is there any app is there or i can develop an app which can be used to measure the FM signal strength.

[SteveJG]

Are you trying to establish the signal strength of an FM radio station or the signal strength of the cell phone provider?

AI2 has no tools to determine the cell phone received signal levels.  If you need to do this Eclipse and Android Studio may have the required tools to capture this information.

Here is what Google has to say about cell phone signal strength:  http://developer.android.com/reference/android/telephony/CellSignalStrength.html   It may help you to determine what you need to do.    Here is another one about signal strength:  http://developer.android.com/reference/android/telephony/SignalStrength.html  

Regards,

Steve

[SteveJG]

Responded by email ...  i want to find the signal strength of fm radio stations signals.Not
cell phone signals.

A android device, by itself CAN NOT measure FM radio signal strength levels.  It might be able to do so if the Android is connected to a device like Arduino that has an FM radio (if such a thing exists). The Android would have to be used with a device that would provide the necessary information about the radio signal.

An Android app can be used to search for FM radio signal strength patterns  and power levels.  You might do this using the ActivityStarter  with AI2. 

You might do it like this if you know the call sign of the FM station or the city it is located in.   Will it work where you are located?   It depends on what information is available about the particular FM radio station or your city.

Launch a Web search:

ACTION:  android.intent.action.WEB_SEARCH

EXTRA KEY:   query

EXTRA VALUE:  Search terms

where the search terms      would look like:    FM power level signal strength  Chicago     or   FM power level signal strength  WXEL 

or  FM radio station signal strength

All this will do is perform a Web search.  What the app finds is what it finds.

Regards

-- Steve ...... please respond within the AI2 forum, not direct.  Thank you.

[abhishek prasadshaw]

Is there any other way to find the FM signal strength.Actually currently am doing project on "location detection using FM signals" for that measuring of FM signal strength is very much necessary.I had referred many IEEE  papers and search on internet but did not got much information that how i can measure the strength with any software or programming code.If you know anything please help me.

regards

Abhishek

[SteveJG]

Field strength of radio signals is normally measure by a field strength meter.  http://en.wikipedia.org/wiki/Field_strength_meter   Some of these devices are very broad banded and others are frequency specific.

A simple way to measure the FM signal strength at your location is to receive an FM radio signal on an FM radio that has something called an S-meter   It measure the electric field in decibels and alternatively something called S -units http://en.wikipedia.org/wiki/S_meter.   An android device can not directly measure any of these, however some radios can do this with built-in S meters.   An Android device is not an FM broadcast radio, however the phones do use FM signals.  You already said that you do not want to measure the signals from a cell tower.

You can build a field strength meter from inexpensive parts  https://www.google.com/search?q=build+field+strength+meter&oq=build+field+strength+meter&aqs=chrome..69i57.6735j0j7&sourceid=chrome&es_sm=93&ie=UTF-8 

The trick is to make is sensitive on the specific broadcast frequency of the FM radio signal you are monitoring.

You might also Google use search terms like     radio direction finding         FM radio signal strength

Regards,

Steve

[abhishek prasadshaw]

Thanks...its seems to be useful.


Regards,
Abhishek