Multiple-Input Multiple-Output (MIMO) technology is today considered one of the most promising systems for high data transmission in wireless communications works. Its implementation with MC-CDMA scheme can provide optimized transmission performance to the mobile users. But the presence of High Peak to Average Power Ratio (PAPR) during the transmission constitutes an obstacle in its use by causing signal distortion and producing an inefficient amplification power in the transmission system. This paper introduces the Companding Transform technique based on Hyperbolic Sine System and the Revised Exponential Companding. After having reviewed and established the comparative study with the current systems performances based on PAPR reduction techniques, we analyze the adjustability in Companding function and the effective trade-off between the PAPR and the bit rate error (BER) performance. This new approach offers a stable high power amplified (HPA) and the non affectation of cost in the new transmission system. Moreover, the simulation works with Matlab are implemented; the results show an outperformed technique for PAPR signal reduction in MIMO- MC CDMA.