Patent ID: 6922406
Filing Date: 2005-07-26
Classification: H04B,H04J,H04L

Abstract:
1. A method of synchronizing base stations in a mobile radio telecommunication system, comprising: transmitting from a first base station a synchronization sequence comprising a first polyphase sequence of length L and a second polyphase sequence of length L following said first polyphase sequence, said second polyphase sequence complementary to said first polyphase sequence and directly connected to said first polyphase sequence by at least one of a periodic extension of length less than L of said first polyphase sequence and a periodic extension of length less than L of said second polyphase sequence; receiving said synchronization sequence at a second base station; correlating the synchronization sequence received at said second base station with at least a portion of the first polyphase sequence and at least a portion of the second polyphase sequence so as to produce a first correlation result and a second correlation result, respectively; and adding said first correlation result and said second correlation result, wherein said periodic extensions of said first and second polyphase sequences are replicas of a part of the respective first and second polyphase sequences.