Patent ID: 7599327

Claim:
A method used by a subscriber station in a wireless communication system for accessing the communication system, comprising: selecting an access sequence from a set of N c access sequences that have been identified to have a low average of peak-to-average-power-ratios of access signals generated by the set of N c access sequences and to have good cross-correlation of the access signals generated by the set of N c access sequences, and wherein the set of N c access sequences has been generated by a corresponding set of sequences of length K, wherein K is a quantity of sub-carriers identified for transmitting an access signal; forming the access waveform by generating an access signal using the access sequence and appending in the time domain a cyclic prefix to the access signal; and transmitting the access waveform, wherein the corresponding set of sequences of length K is based on a set of (N G −1) Generalized Chirp Like (GCL) sequences that are defined as: s u ⁡ ( k ) = exp ⁢ { - j2π ⁢ ⁢ u ⁢ ⁢ k ⁡ ( k + 1 ) 2 ⁢ N G } , k = 0 ⁢ ⁢ … ⁢ ⁢ N G - 1 ⁢ ⁢ and u ⁡ ( “ class ⁢ ⁢ index ” ) = 1 ⁢ ⁢ … ⁢ ⁢ N G - 1 wherein N G is a prime number that is one of the next number larger than K that is prime, the next number smaller than K that is prime, and K when K is prime.