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I am trying to position a digital unit using a number of receivers by recording the signal strength at each receiver.

However, since not all digital units will emit with the same signal strength I cannot use the traditional approaches to multilateration (that I've heard of at least).

Could someone help me do this?

I've tried by considering the signal strengths [RSSI] as proportional to one another and subsequently tried to project them onto a coordinate system [m] - but just can't seem to get it right.

EDIT:

Essentially I want to reformulate this problem:

FIND coordinates of P

Given:

  • coordinates of receivers/nodes A,B,C in a 2D-plane : {x_A,y_A,...,y_C} [unit: m]
  • signal strength received at the nodes from unknown point P: {|RSSI_AP|,...,|RSSI_CP|}

Into this problem (that is easily solved using a trilateration algorithm):

FIND coordinates of P

GIVEN:

  • coordinates of receivers/nodes A,B,C in a 2D-plane : {x_A,y_A,...,y_C} [unit: m]
  • distance to point P from the receivers: {d_AP,d_BP,d_CP}
Pete
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  • This is StackOverflow and people ask about coding problems. Your question doesn't seem to be related to any programming problem. I encourage you to post your question [here] (http://electronics.stackexchange.com/) instead – Amir Mar 04 '16 at 20:56
  • Thank you very much for the swift response Amir! Ah, okay, I edited the question so that it would be more clear that it should be more of a mathematical/algorithmical problem. Do you still think it does not belong. (The reason I am asking is because I want to be indifferent to hardware specifics) – Pete Mar 05 '16 at 11:54

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