Patent ID: 8155251
Filing Date: 2012-04-10
Classification: H04W

Abstract:
1. A method for detecting multiple access bursts in a random access channel, each access burst including a transmission preamble that is a member of a preamble set, and wherein the preamble set includes sequences of preamble symbols obtained by cyclically shifting a basic preamble sequence, the method comprising the steps of: receiving multiple access bursts in the random access channel including as transmission preambles different members of the preamble set; determining correlation information comprising a correlation function indicating a correlation between a single correlation preamble and each of the received multiple different transmission preambles in a time dimension, wherein the correlation preamble is a member of the preamble set, and wherein determining the correlation information further comprises subdividing the correlation function into zones, each zone being associated with the correlation of one member of the preamble set with the correlation preamble; and substantially simultaneously detecting the multiple access bursts by analyzing the correlation information determined using the single correlation preamble.