Hi, Thanks iceman and Logeshwaran. did not have problems thanks to your indication - now I'm trying to have parallel channels and i want to know if it possible to choose the correlation between them. I mean, something like function[ch1fading, ch2fading] = makefading(correlation_index) or I have generate one and repeat the generation of the second until I obtain the desired correlation Cheers!! bruno --- In matlab@y..., Logeshwaran Vijayan <logesh@i...> wrote: > Hi, > > Assuming that the signal 't' is real (for BPSK modulation), > > r = t * c + n > > where 'c' is complex gaussian variable with mean 0 and var 0.5 per real > dimension. > > 'c' can be written as |c| (magnitude which is rayleigh random variable) > and angle(c) (this is uniformly distributed r.v.) > > c can also be represented as x + j*y, x = N(0,0.5) and y = N(0,0.5) > where N(a,b) is gaussian r.v. with mean a and variance b. > > hope this helps. if u have further doubts, you can check out my homepage > (in my signature below). i have put up some reports on rayleigh fading, > rician fading, etc ... > > logesh. > > On Fri, 9 Aug 2002, brunomaggi2002 wrote: > > > Hi > > I'm getting into radio channel simulations and I've come across the > > following > > r = t * c + n > > r (received) > > t (transmitted) > > c fading > > n (noise) > > where, books say, c is a complex gaussian variable with mean 0 and > > variance 0.5 per real dimension. My question is, given that c is > > complex, what's the mean and variance of the imaginary dimension? > > Cheers > > Bruno > > > > > > > > > > _____________________________________ > > Note: If you do a simple "reply" with your email client, only the author of this message will receive your answer. You need to do a "reply all" if you want your answer to be distributed to the entire group. > > > > _____________________________________ > > About this discussion group: > > > > To Join: matlab-subscribe@y... > > > > To Post: matlab@y... > > > > To Leave: matlab-unsubscribe@y... > > > > Archives: http://www.yahoogroups.com/group/matlab > > > > More DSP-Related Groups: http://www.dsprelated.com/groups.php3 > > > > ">http://docs.yahoo.com/info/terms/ > > > > > > -- > ------------------------ > Logeshwaran Vijayan > Graduate Student/Research Assistant > EECS Department-The University of Kansas > Lawrence, Kansas. > > Office : > Room 339, Raymond Nichols Hall > Information and TeleCommunication Technology Center > Phone No. (785)-864-7799 > E-Mail : logesh@i... > URL : www.ittc.ku.edu/~logesh > > Residence : > 1301 W 24th Street, #o-06, > Lawrence, KS 66046 > Phone No. (785)-749-4398 > ____________________________________________________________ > Create a vision of who you want to be and live into that > picture as if it were already true - Arnold Schwarzenegger > ------------------------ |