Patent ID: 8472423
Filing Date: 2013-06-25
Classification: H04B,H04J,H04L,H04W

Abstract:
1. A method of accessing a communication network comprising: receiving a communication signal having a plurality of sets of time-continuous signal components, the communication signal being an OFDM (Orthogonal Frequency Division Multiplexing) signal; determining a transformation window start position, the transformation window having a length of a predetermined period and corresponding to at least a portion of the plurality of sets of time-continuous signal components; searching for access channel information within the transformation window in at least one predetermined set of the plurality of sets of time-continuous signal components, each of the at least one predetermined set of time-continuous signal components comprising signal components carried by a respective sub-carrier in a plurality of OFDM symbols; wherein the searching includes iteratively moving the transformation window in time from the start position and subsequently performing a transformation and a correlation operation for each new window position to find a common synchronization code associated with a plurality of base stations in the communication network; and determining synchronization parameters based on a location of the access channel information in the at least one predetermined set of time-continuous signal components.