Help needed in SSS Symbol Generation

[samba16]

Hi everyone ,

I am currently doing my research on uplink LTE

I need help in generating Two length-31 binary sequences used to generate the SSS. so that i can work on constructing the LTE Time frame

i used the formulas to generated the s,z and c sequence , but i am stuck in generating the s0(m0) and s1(m1).

If anyone knows how to generate them , kindly help me ,

Thanks in advance

 

[kalyanasv]

As you probably know that s_0(m0)=s((n+m0)mod 31) it is 31 cyclic shift binary sequence, where s(i) =1-2x(i), where x(i) is function of past inputs mod 2. the initial conditions are there in the spec.

 

[samba16]

yes i know that , i generated the s(i) and when i try to generate s_0(m0)=s((n+m0mod31)) , when we get to the stage for example

lets say i pick m0=0 and m1=1 so s_0(m0)=s((n+m0mod31)) ,case is it when n=31, mod (31,31)=0 in our case does it mean the first sample in s(i) again

 

[kalyanasv]

In your case s_(0)^(m0)=1, in such a case, if you consider the initial conditions etc.
Yes, it is a cyclic code so it will keep looping.

 

[samba16]

Thanks , i will try to implement the next steps and i will get back if i have any problem