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  1. #1
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    signal received by a node j in wsn

    Hi all,

    I want to know what is the formula of received signal by node j separed by distance d from a source i in wsn.
    sometimes I find this formula: yij=hij * x+nij
    in another yij=sqrt(p * gamma)* hij*x+nij ; where p is the source transmit power and gamma is the pathloss

    another formula is yij=sqrt(p) * hij * x+nij ; where p is the source transmit power

    I'm confused please can someone help me , thanks.

    •   Alt2nd December 2016, 15:47

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  2. #2
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    Re: signal received by a node j in wsn

    They are all valid for analysis purposes. Usually, if you say that x has normalized power, then you include sqrt(p), such that the signal-to-noise ratio (SNR) is P/N, where N is the noise power. Some like to make it more practical by including the pathloss, but I think unless the analysis is about the pathloss, and shadowing effect, it's not necessary to be included. It's just a scaled factor in RF channels.



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