Independent Component Analysis Assisted Efficient PAPR Reduction and Symbol Recovery in OFDM Systems

In order to coordinate the performance loss and PAPR reduction due to the effect of the conventional PAPR reduction scheme, a new peak-to-average power ratio (PAPR) reduction and symbol recovery scheme in OFDM system is proposed assisted by precoding and independent component analysis (ICA). The proposed scheme is formulated as the model of the mixture of the mutual statistical independence of subcarrier’s signals of OFDM, which can use ICA for strengthening the signal recovery capabilities. Simulation results illustrate that the precoding in transmitter combined with ICA based blind equalization not only provides PAPR reduction role, but also has a better bit error rate (BER) performance, which makes a good trade off between bandwidth and energy requirement. Key-Words: independent component analysis; orthogonal frequency division multiplexing; peak-to-average power ratio; blind equalization