In an embodiment, a method for optimum Receiver (Rx) beam selection in NR is disclosed. The method includes, performing a Reference Signal Received Power (RSRP) measurement for one or more Rx beams during an idle period as a part of an initial synchronization procedure. The method includes determining an optimum Rx beam amongst the one or more Rx beams with a RSRP peak greater than RSRP peak associated with other Rx beams amongst the one or more Rx beams by a pre-defined offset as a part of a beam-sweep operation. The method further includes pairing the optimum Rx beam with a Transmitter (Tx) beam for a Synchronization Signal Block (SSB) detection in a first half-frame of the SSB Burst upon elapse of the idle period.