PAPR Reduction using blend of Precoder and μ-law Compander in HACO System

This paper proposes a hybrid technique using a combination of precoder and a compander (μ-law) for peak-to-average power ratio (PAPR) reduction and the bit error rate (BER) improvement in a hybrid asymmetrically clipped optical orthogonal frequency division multiplexing (HACO-OFDM) system. The transmitted HACO signal is pre-processed in the frequency domain using a predefined precoder matrix and is compressed using μ-law compander in the time domain. The suggested method lowers the PAPR by 9.75 dB for a conventional HACO system and shows the improvement in bit error rate (BER) performance for high rate packet transmission. Furthermore, the proposed scheme shows the minimum optical bit energy required for transmitting high-speed data in comparison to precoded and companded HACO-OFDM schemes.