Method of performing cell search by user equipment (UE)

1. A method of performing a cell search by a user equipment (UE), the method comprising:

receiving a signal from a base station;

estimating a fractional frequency offset (FFO) along with a coarse timing using a cyclic prefix (CP) in the received signal;

compensating the received signal with the estimated FFO;

applying a correlation on the compensated received signal with each of a plurality of primary synchronization signals (PSSs) generated at the UE;

determining a plurality of cell search parameters based on the applied correlation;

determining that the plurality of cell search parameters are unavailable;

applying a correlation on the received signal with each of the plurality of primary synchronization signals (PSSs) to eliminate each value from a candidate set of values considered for integer frequency offset (IFO) to determine IFO; and

determining the plurality of cell search parameters based on the correlation.

2. The method of claim 1 , wherein the cell search parameters include a PSS ID, PSS timing, a length of CP and a mode of operation of the cell.

3. The method of claim 2 , wherein the PSS ID is determined by identifying a maximum value, wherein the PSS timing is determined by identifying a position associated with the maximum value.

4. The method of claim 3 , identifying the maximum value and the position associated with the maximum value comprises:

forming a matrix by correlating the received signal with each of the PSSs with a value among the candidate set of values;

applying the correlation on the received signal with each of the PSSs with each value among the set of values; and

placing samples obtained from each correlation in the matrix.

5. A user equipment (UE) for performing a cell search, the UE comprising a receiver configured to:

receive a signal from a base station;

estimate a fractional frequency offset (FFO) along with a coarse timing using a cyclic prefix (CP) in the received signal;

compensate the received signal with the estimated FFO;

apply a correlation on the compensated received signal with each of a plurality of primary synchronization signals (PSSs) generated at the UE;

determine a plurality of cell search parameters based on the applied correlation;

determine that the plurality of cell search parameters are unavailable;

apply a correlation on the received signal with each of the plurality of primary synchronization signals (PSSs) to eliminate each value from a candidate set of values considered for integer frequency offset (IFO) to determine IFO; and

determine the plurality of cell search parameters based on the correlation.

6. The UE of claim 5 , wherein the cell search parameters include a PSS ID, PSS timing, a length of CP and a mode of operation of the cell.

7. The UE of claim 6 , wherein the wherein the PSS ID is determined by identifying a maximum value, wherein the PSS timing is determined by identifying a position associated with the maximum value.

8. The UE of claim 7 , wherein the receiver is configured to identify the maximum value and the position associated with the maximum value by:

forming a matrix by correlating the received signal with each of the PSSs with a value among the candidate set of values;

applying the correlation on the received signal with each of the PSSs with each value among the set of values; and

placing samples obtained from each correlation in the matrix.