Comments on: Deriving PDF of Rayleigh random variable http://www.dsplog.com/2008/07/17/derive-pdf-rayleigh-random-variable/ Signal Processing for Communication Mon, 06 Sep 2010 00:20:23 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: Krishna Sankar http://www.dsplog.com/2008/07/17/derive-pdf-rayleigh-random-variable/#comment-24647 Krishna Sankar Sat, 03 Apr 2010 22:49:46 +0000 http://www.dsplog.com/?p=197#comment-24647 @PeterRay: My replies a) You can use the histogram (hist function in Matlab) to obtain the PDF. b) One needs to the write the equations to figure out the nature of the PDF c) Did you mean, you want to add correlation to the channel coefficients? @PeterRay: My replies
a) You can use the histogram (hist function in Matlab) to obtain the PDF.
b) One needs to the write the equations to figure out the nature of the PDF
c) Did you mean, you want to add correlation to the channel coefficients?

]]> By: PeterRay http://www.dsplog.com/2008/07/17/derive-pdf-rayleigh-random-variable/#comment-20718 PeterRay Wed, 17 Feb 2010 16:01:57 +0000 http://www.dsplog.com/?p=197#comment-20718 Hello Krishna, I am new to matlab. I need some help. Suppose we have 'Nr x Nt' MIMO channel matrix.And we assume iid rayleigh fading. So the magnitude of every entry will be rayleigh distributed. Now at the receiver side we have 'Nr' receive antennas and at every antenna we will have a set of values for every transmitted symbol. I wish to plot the pdf of the output values. (like the output SNR). How do I find the pdf then ? What kind of pdf will it be ? Further if I have to toss independent and non identical channels how to I do that ? we usually write "(1/sqrt(2))*(randn(Nr,Nt)+j*randn(Nr,Nt))" for a typical unit variance zero mean channel.Please correct me if my understanding is wrong. Any help would be appreciated. Hello Krishna,
I am new to matlab. I need some help. Suppose we have ‘Nr x Nt’ MIMO channel matrix.And we assume iid rayleigh fading. So the magnitude of every entry will be rayleigh distributed. Now at the receiver side we have ‘Nr’ receive antennas and at every antenna we will have a set of values for every transmitted symbol. I wish to plot the pdf of the output values. (like the output SNR). How do I find the pdf then ? What kind of pdf will it be ? Further if I have to toss independent and non identical channels how to I do that ? we usually write “(1/sqrt(2))*(randn(Nr,Nt)+j*randn(Nr,Nt))” for a typical unit variance zero mean channel.Please correct me if my understanding is wrong. Any help would be appreciated.

]]> By: Krishna Sankar http://www.dsplog.com/2008/07/17/derive-pdf-rayleigh-random-variable/#comment-16900 Krishna Sankar Thu, 10 Dec 2009 01:05:23 +0000 http://www.dsplog.com/?p=197#comment-16900 @mesange: Hope the following code snippet helps >>h = 1/sqrt(2)*(randn(1,1000) + j*randn(1,1000)) % rayleigh random variable >>hP = h.*conj(h); % finding the power >>hist(hP) % plotting the histogram @mesange: Hope the following code snippet helps
>>h = 1/sqrt(2)*(randn(1,1000) + j*randn(1,1000)) % rayleigh random variable
>>hP = h.*conj(h); % finding the power
>>hist(hP) % plotting the histogram

]]> By: mesange http://www.dsplog.com/2008/07/17/derive-pdf-rayleigh-random-variable/#comment-16855 mesange Wed, 09 Dec 2009 08:33:13 +0000 http://www.dsplog.com/?p=197#comment-16855 Dear Krishna I hope you are doing good !!! I have question relating to gaussian random variables, i need to plot the pdf of the following: =summation(from i=0 to i = P) |H^i|² where H are circularly symmetric complex Gaussian random variables ... I donno how to do it in matlab ,,, kindly help thanks in advance, mesange. Dear Krishna I hope you are doing good !!!
I have question relating to gaussian random variables, i need to plot the pdf of the following:

=summation(from i=0 to i = P) |H^i|²

where H are circularly symmetric complex Gaussian random variables …
I donno how to do it in matlab ,,, kindly help
thanks in advance,
mesange.

]]> By: Bookmarks about Pdf http://www.dsplog.com/2008/07/17/derive-pdf-rayleigh-random-variable/#comment-1820 Bookmarks about Pdf Fri, 19 Sep 2008 13:15:04 +0000 http://www.dsplog.com/?p=197#comment-1820 [...] - bookmarked by 4 members originally found by jamo on 2008-08-27 Deriving PDF of Rayleigh random variable http://www.dsplog.com/2008/07/17/derive-pdf-rayleigh-random-variable/ - bookmarked by 5 members [...] [...] – bookmarked by 4 members originally found by jamo on 2008-08-27 Deriving PDF of Rayleigh random variable http://www.dsplog.com/2008/07/17/derive-pdf-rayleigh-random-variable/ – bookmarked by 5 members [...]

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