Patent ID: 7876741

Claim:
A method of acquiring Uplink (UL) synchronization for a mobile WiMax system analyzer, the method being performed, when a DL sub-frame containing Connection Identifier (CID) information assigned and stored in advance is received, on a Portable Subscriber Station (PSS) having a test mode function of creating a UL sub-frame through the mobile WiMax system analyzer having signal generating means configured to store the CID information in advance and signal analyzing means configured to receive and analyze the DL sub-frame, without requiring a network entry procedure in conjunction with a Radio Access Station (RAS), the method comprising: step (a) of the signal generating means continuously D/A converting, RF-modulating and outputting the DL sub-frame obtained by encoding data, including a cell Identification (ID) previously known to the signal analyzing means, the CID information stored in the PSS and at least one frame number; step (b) of the signal analyzing means receiving the UL sub-frame, which is created through encoding of known test data based on the cell ID and the frame number, is RF-modulated and is output by the PSS; step (c) of the signal analyzing means continuously demodulating, A/D-converting and capturing the modulated UL sub-frame to a predetermined extent such that a temporal amount of the UL sub-frame exceeds that of at least one frame; and step (d) of the signal analyzing means acquiring UL synchronization by comparing the UL sub-frame, created by encoding the known test data based on the cell ID and the frame number and stored in advance, with the data captured at step (c), using a time correlation technique.