Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Adding data sequence to gaussian noise sequence

Status
Not open for further replies.
R

ryder

Newbie level 4
Joined
Jul 5, 2013
Messages
6
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Activity points
37
Adding data sequence to gaussian noise sequence in MATLAB

Hi,
received sequence,r(n)=s(n)+v(n)
s(n)=+-1 is the data sequence and v(n) is a gaussian noise sequnce.
Decision ckt :if r(n)>0 then 1
r(n)<0 then 0

Now i have to estimate BEP for SNR of 0 to 10 in 1dB increment.

Should i use awgn function for the gaussian noise sequence? Please let me know how to do this.
 
Last edited:

you can use randn function for awgn noise
e.g. sqrt(variance)*(randn(1,1)-mean) is awgn noise.
 
  • Like
Reactions: ryder

    R

    ryder

    Points: 2
    Helpful Answer Positive Rating
Pulkit Varshney said:
you can use randn function for awgn noise
e.g. sqrt(variance)*(randn(1,1)-mean) is awgn noise.
Click to expand...
thank you very much....
how can i generate the data sequence s(n)=+-1? should i simply initialize an array like [1, -1,1,-1....]?
 

2*round(rand(1,n))-1
n=total number of bits in your sequence.
 
  • Like
Reactions: ryder

    R

    ryder

    Points: 2
    Helpful Answer Positive Rating
Pulkit Varshney said:
you can use randn function for awgn noise
e.g. sqrt(variance)*(randn(1,1)-mean) is awgn noise.
Click to expand...
i have to generate gaussian noise with snr increment from 0 to 10dB, with step size of 1dB.
i'm using variance=10^(-snr/10); in noise=sqrt(variance)*randn(size(x));
now i want the snr to be in dB.......any code to convert snr in magnitude to snr in dB.
i found this on mathworks.com "ydb=mag2db(y)" .but this is to convert a single value. In my case i want incrementing snr in dB :(
 

its your consideration, matlab doesnt know what is db and what is not db
you have to treat that variable like it is in db
 
  • Like
Reactions: ryder

    R

    ryder

    Points: 2
    Helpful Answer Positive Rating
Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top