Generalized Frequency Division Multiplexing (GFDM) is the advanced multi-carrier methodology proposed for a reliable operation of the $5^{th}$ generation (5G) systems. It has been observed that the performance of GFDM is hampered by the elevated peak to power ratio (PAPR). High PAPR leads to the saturation of the transmit power amplifier which degrades the bit error rate (BER) and causes the out of band emissions. The prime objective of this work is to evaluate the PAPR performances of GFDM under the various reduction schemes like precoding, clipping, companding, precoding ＋ clipping and precoding ＋ companding. The results show that the precoding techniques combined with clipping or companding results in less PAPR and BER as compared to the conventional GFDM. The discrete cosine transform (DCT) and discrete sine transform (DST) precoded GFDM provides a signal to noise (SNR) improvement of $2-4$ dB and $5-8$ dB respectively, in comparison to conventional GFDM systems for a BER of $10^{-3}$.

广义频分复用 (GFDM) 是一种先进的多载波方法，用于可靠运行 $5^{吨H}$代 (5G) 系统。据观察，GFDM 的性能受到峰值功率比 (PAPR) 升高的阻碍。高 PAPR 会导致发射功率放大器饱和，从而降低误码率 (BER) 并导致带外发射。这项工作的主要目的是评估GFDM在预编码、限幅、压扩、预编码+限幅和预编码+压扩等各种缩减方案下的PAPR性能。结果表明，与传统的 GFDM 相比，与限幅或压扩相结合的预编码技术导致更小的 PAPR 和 BER。离散余弦变换 (DCT) 和离散正弦变换 (DST) 预编码 GFDM 提供了信噪比 (SNR) 改进$2-4$ 分贝和 $5-8$ dB，与传统 GFDM 系统相比，BER 为 $10^{-3}$.