Method to increase signal-to-noise ratio of a cyclic-prefix orthogonal frequency-division multiplex signal

摘要

A method to decode an orthogonal frequency-division multiplex (OFDM) signal data block (38) that includes symbol-data (32) in a data interval, repeated-data (34) in a cyclic-prefix (CP) guard interval, and noise (36). The signal (30) is often called a CP-OFDM signal. The method includes determining a first data set based on data samples taken during a first time window of a data block (38). The method also includes determining a second data set based on data samples taken during a second time window of the data block (38), wherein the second time window is selected so that the second data set includes repeated-data (34) not present in the first data set. The method (200) also includes combining the first data set and the second data set in a manner effective to increase a signal-to-noise ratio of the signal (30). The combining process increases signal (30) data energy more than noise (36) data energy.