hello I've read in the forum that there are three main values for signal quality (tinyos, tossim 2.x) :
- the power which traduce the signal power (i've read in tossim the power is set up to 0 dB and then it is equal to gain value entered) - the gain which is the extenuation of the signal into the space - the noise floor(NF) which traduce the pertubation over the signal there is also : - SNR (signal to noise ratio) : equal to the difference or the ratio between the noise and the signal (so if my gain is equal to -4db and my NF is equal to -90dB, SNR= -4--90 = 86dB ) Does this following points are correct? - the SNR traduces the distance between the noise and the signal and so the bigger it is the better the signal become - the noise floor in TOSSIM is given by the meyer-heavy.txt file values (expressed in dB and corresponding to RSSI) or by the values after noise in the linggain.out file - i've read that on real hardware, the RSSI must a be positive value... - tossim doesn't allow to set up the signal power so Power = Gain? - i try a constant value for the RSSI (-55) but my simulation prematurely stop , i've given 150 noise tracings for each sensor. what is wrong? why tossim stops the simulation? (my gain is equal to 0 for each pairs) thanks _______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
