Proposed New Schemes to Reduce PAPR for STBC MIMO FBMC systems

Filter bank multicarrier (FBMC) system support better spectral efficiency and high data rate compared to OFDM system. However, the capacity of FBMC system can be increased significantly by occupying Multiple Input and Multiple Output MIMO system. The combination of MIMO and FBMC system may be used for next communication system 5G to support high spectral efficiency. The major disadvantage of FBMC MIMO system are high peak to average power ratio (PAPR) which reduced the performance of the FBMC system .There are many reduction techniques have been used to reduce PAPR. However, The nonlinear companding technique and Precoding system used widely to reduced peak to average power ratio (PAPR) for Multicarrier Modulation(MCM) System. In this paper, we Proposed new schemes based on the combination of Walsh-Hadamard Transform (WHT) Precoding with the companding technique based on the A-law and Mu-law technique to reduce PAPR for MIMO FBMC system with using Space Frequency Block Coding (STBC). Moreover, the Precoding Technique used in the frequency domain and nonlinear companding technique in the time domain. However, simulation results show that the combination of WHT precoding with A-law companding can achieve a better PAPR reduction and bit error rate(BER) performance compared to the combination of the WHT precoding with Mu companding technique.