Patent ID: 8249193

Claim:
A wireless communication user terminal, the terminal comprising: a transceiver; a controller communicably coupled to the transceiver and to memory, information stored in the memory, the information representative of a plurality of Quadrature Phase Shift Keying (QPSK) sequences, each of the QPSK sequence includes 24 elements wherein each of the 24 elements includes a phase component of π/4 weighted by a phase scaling factor, as follows: Element Phase Scaling Factors 1 2 3 4 5 6 7 8 9 10 11 12 QPSK_Se- −3 3 3 −1 −1 −3 −1 3 1 3 1 3 quences −3 1 1 3 −1 1 3 1 −3 1 −3 1 −3 −3 1 1 −1 1 −1 1 −1 3 1 −3 −3 −1 −3 3 1 −1 −3 −1 −3 −3 3 −3 3 −1 3 3 1 1 −3 3 3 3 3 1 Element Phase Scaling Factors 13 14 15 16 17 18 19 20 21 22 23 24 QPSK_Se- 1 1 −1 3 1 −1 1 3 −3 −1 −1 1 quences 1 −1 −1 3 −1 −3 3 −3 −3 −3 1 1 −1 1 −1 1 −1 −1 3 3 −3 −1 1 −3 3 −3 −1 1 3 1 −3 1 3 3 −1 −3 −1 3 −1 1 1 −1 −3 −1 −1 1 3 3 the controller configured to select a QPSK sequence and to generate a reference signal based on the information representative of the selected QPSK sequence.