Patent ID: 8942318
Filing Date: 2015-01-27
Classification: G06F,H04B,H04L

Abstract:
1. An apparatus comprising: one or more antennas configured to receive signals transmitted over a cellular telecommunications network; a demodulator configured to (i) demodulate signals received by the one or more antennas, and (ii) generate a first input signal and a second input signal; a transformation unit configured to (i) rotate a phase of phase shift keying (PSK) sequences of the first input signal by one of +π/4 and −π/4 to generate a first signal of complex sequences, (ii) rotate a phase of PSK sequences of the second input signal by one of +π/4 and −π/4 to generate a second signal of complex sequences, and (iii) based on the first signal of complex sequences and the second signal of complex sequences, generate (A) one or more sign bits and (B) one or more type bits, a cross-correlator configured to cross-correlate the first signal of complex sequences and the second first signal of complex sequences.