Talk:Time of arrival
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Synchronization
[edit]Is synchronization really needed for TDoA? With multilateration I think it is definitly not needed. Whereas one could say with ToA, knowing an absolute time on the sender and on the receiver implies synchronization. --ThyMYthOS (talk) 12:56, 8 November 2008 (UTC)
For TDoA, sender and receiver do not need to be synchronised, however, the receivers have to be accurately synchronized with each other for the calculated time difference of arrival to have any meaning. --Spuzzdawg (talk) 06:09, 7 March 2014 (UTC)
introduction
[edit]This article has several errors. Time of arrival is not the same as time of flight as a literal reading of the words indicate. More serious is the error in the second and third sentences: the speed of light in a vacuum is not a function of carrier frequency.
In the GPS-related literature that I am familiar with either term TOA or TDOA can be used to identify the general principle of operation. For example you could say GPS uses TOA or TDOA techniques by measuring (a biased) TOA and then solving systems of either N TOA equations or N-1 TDOA equations. There are lots of proofs in the literature that either system gives the same answer. The receiver and transmitter do not require time synchronization because the receiver clock error is a solution variable. There are many GPS books that would be good to reference here since GPS is where most people encounter TOA/TDOA techniques.
-- jjmason — Preceding unsigned comment added by 198.102.153.2 (talk) 21:09, 8 November 2012 (UTC)
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