Hello all
Referring to this question: Sub-carrier-spacing-in-LTE-application-framework
I'm trying to modify the number of subcarriers in 20MHz LTE AF
Now stuck in the sync process between TX and RX, as LTE AF RX used 2 FIR filters for cross correlation
Use FIR filter to decimate 16 also really confuse me
In LTE AF cross correlation, used 2 FIR filters with 3 coefficient set, each set has 128 elements
At begin I think FIR coefficients set are just the PSS sequence after IFFT and decimate 16
3 coefficients set of 3 cell ID candidates
But I just realized that maybe not true, one of the FIR filter's last 2 coefficient sets are exactly the same
The other FIR filter's last 2 coefficient sets has the same number, but with opposite sign
How do those FIR coefficients actually related to the PSS sequence we generate in TX?
