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Xbee or other wireless communication methods

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ssylee

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I'm trying to have a small robot car sending data about its position relative to a reference point in real-time. While I know Xbee can be used for wireless data transfer between two transceivers, I'm not sure about the following:

a) how well XBee chips handle distances that are close to the limit (100 m for Xbee, 1 mile = 1.60 km for Xbee Pro), as the power usually drops off as a 1/r^2 relationship?
b) whether the signal strength received is proportional to the distance
c) how the propagated waves carrying the signals generated by the transceivers are propagating through/around a wall corner that the car would encounter during the course?

Are there other wireless communication similar to Xbee that would allow me to determine real-time position of an object? Thanks in advance.
 

ssylee

New Member
I am also thinking of putting a Xbee repeater somewhere in the path to ensure the signal is strong enough to be received properly. I would welcome any suggestions. Thanks.
 

Mikebits

Well-Known Member
Are there other wireless communication similar to Xbee that would allow me to determine real-time position of an object? Thanks in advance.
You cannot determine position based on a single signal strength. Best bet is to have xbee transmit GPS info.

b) whether the signal strength received is proportional to the distance
One would think so but, No
 
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ssylee

New Member
Aren't GPS chips usually very expensive? or do you have any recommendations for affordable chips that I can use?
 

tytower

Banned
One would think so but, No
In my opinion the answer should be yes , however many factors influence this .
What frequency, what influences are in the locality. How good is the measuring equipment
 
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