Patent ID: 8295325

Claim:
A transmitter comprising: a processor configured to generate a plurality of signature sequences and to assign and to transmit the plurality of signature sequences to respective plural receivers for use by the receivers in conjunction with wireless transmissions over a channel, each of the signature sequences being selected from a set of sequences formed by delay-Doppler shifts of a base sequence; wherein the set of sequences is represented by s l , m ⁡ [ n ] = s ⁡ [ n - l ⁢ ⁢ τ d ] ⁢ ⅇ j 2 ⁢ π ⁢ ⁢ mv d ⁢ n N , wherein (l,m) is an index associated with a selected sequence; wherein N is a length of the base sequence s[n]; wherein (τ d ,ν d ) is a minimum delay-Doppler separation between any pair of derived sequences.