Patent ID: 8897286

Claim:
A method for facilitating an uplink synchronization between a first transceiver and a second transceiver within a cell in a multi-user cellular communication system, the method comprising: receiving, by the first transceiver, a synchronization signal designated for the uplink synchronization, the synchronization signal being sent from the second transceiver over a random access channel, a first signature sequence being used in a preamble portion of the synchronization signal, and the first signature sequence being generated, at least in part, from a sequence with a zero-correlation zone, wherein the sequence with a zero-correlation zone is based on a Zadoff-Chu sequence, the Zadoff-Chu sequence being: a ⁡ ( k ) = { W N k 2 / 2 + qk , N ⁢ ⁢ even W N k ⁡ ( k + 1 ) / 2 + qk , N ⁢ ⁢ odd , ⁢ k = 0 , 1 , … ⁢ , N - 1 , where ⁢ ⁢ W N = exp ⁢ ⁢ ( - j2 ⁢ ⁢ π ⁢ ⁢ r / N ) , where r, q and N are integers, and r is relatively prime to N; and performing, by the first transceiver, a correlation of the synchronization signal, the correlation being designated for detection of the first signature sequence.