Nov 12, 2008 #1 M matlab1983 Member level 2 Joined Nov 3, 2008 Messages 52 Helped 2 Reputation 4 Reaction score 2 Trophy points 1,288 Activity points 1,549 just_read hi all i have a problem for the meaning of S/N ratio now if we work on BPSK the Eb=1 since once we send 1 or -1 the energy is 1 and if we work in AWGN channel with zero mean and unit variance in other word N0=variance, since the mean=0. so the overall will be S/N=1/1=1 can any one help me what is the wrong?
just_read hi all i have a problem for the meaning of S/N ratio now if we work on BPSK the Eb=1 since once we send 1 or -1 the energy is 1 and if we work in AWGN channel with zero mean and unit variance in other word N0=variance, since the mean=0. so the overall will be S/N=1/1=1 can any one help me what is the wrong?
Nov 12, 2008 #2 R ring0 Member level 3 Joined Nov 10, 2008 Messages 60 Helped 5 Reputation 10 Reaction score 0 Trophy points 1,286 Location Moscow, Russia Activity points 1,606 Re: just_read S/N doesn't equal Eb/N0.
Nov 14, 2008 #3 M matlab1983 Member level 2 Joined Nov 3, 2008 Messages 52 Helped 2 Reputation 4 Reaction score 2 Trophy points 1,288 Activity points 1,549 Re: just_read hi this is good work but still the idea not clear in other words i see in papers and in matlab help that the varience = 0.5/(s/n) and s/n is a vector form like from [5:30] db so the varience also will be a vector so the question is the varience is it a scalar when we talk uint varience (=1) or is it a vector for each s/n there are different varience ? thanks for all
Re: just_read hi this is good work but still the idea not clear in other words i see in papers and in matlab help that the varience = 0.5/(s/n) and s/n is a vector form like from [5:30] db so the varience also will be a vector so the question is the varience is it a scalar when we talk uint varience (=1) or is it a vector for each s/n there are different varience ? thanks for all
Nov 19, 2008 #4 M matlab1983 Member level 2 Joined Nov 3, 2008 Messages 52 Helped 2 Reputation 4 Reaction score 2 Trophy points 1,288 Activity points 1,549 Re: just_read hi i dont know where i read but i want toas k always the varience is scalar?