top button
Flag Notify
    Connect to us
      Site Registration

Site Registration

How does UE find the PSS and SSS

0 votes
847 views

When we switch on the UE (for a first time), how does it know the DC subcarrier to find the PSS(Primary synchronization signal) and SSS (secondary synchronization signal).

posted Jul 1, 2014 by anonymous

Share this question
Facebook Share Button Twitter Share Button LinkedIn Share Button

1 Answer

+2 votes

DC subcarrier is the subcarrier whose frequency is equal to the RF centre frequency of the transmitting station.It corresponds to frequency zero (Direct Current) if the FFT signal is not modulated.DC subcarrier has no information sent on it, i.e DC subcarrier is not transmitted, but is counted in the number of subcarriers. It is used by the mobile device to locate the center of the OFDM frequency band.
In the frequency domain, the PSS and SSS occupy the central six RBs. The synchronization sequences use 62 subcarriers in total, with 31 subcarriers mapped on each side of the DC subcarrier. Five subcarriers at each extremity of the six central RBs are unused.

answer Jul 1, 2014 by Cellularsme .
Similar Questions
+1 vote

If PSS is read first then why SSS comes first in time domain?

+1 vote

Once UE receives mobility control (contatins pci and dl BW etc) info in rrcconnectionreconfiguration message from source eNB, will UE reads PSS and SSS of target eNB ? bcz already have given pci .

+3 votes

I know that fact PSS and SSS are transmitted at slot zero of first and fifth sub frames of a radio frame. But what is the reasoning behind it to transmit at these particular location ? Is any calculation behind it ?

+1 vote

Why these two are placed side by side within "first time slot" of 0th and 5th sub frame of a radio frame ?
Is it due to any mathematical calculation or something else ?

0 votes

Is there any Advantage over Zaddoff sequence?

...