Patent ID: 8737191

Claim:
A wireless transmit/receive unit (WTRU), configured at least in part to: receive an asymmetrically clipped optical orthogonal frequency-division multiplexing (ACO-OFDM) signal, the ACO-OFDM signal including one or more ACO-OFDM symbols and the ACO-OFDM signal being generated absent either a pilot or a training sequence; and determine a correlation between a first block of N/2 samples of the one or more ACO-OFDM symbols and a second block of N/2 samples of the one or more ACO-OFDM symbols, the first block of N/2 samples and the second block of N/2 samples representing a first block set of N/2 samples, N being an integer representing a number of samples of the one or more ACO-OFDM symbols.