Performance Analysis of Hybrid Peak to Average Power Ratio Reduction Techniques in 5G UFMC Systems

Abstract

The universal filtered multi-carrier (UFMC) technique has been proposed as a prominent waveform candidate for fifth generation (5G) communication techniques. However, UFMC systems exhibit a high peak-to-average power ratio (PAPR), which causes serious degradation in the performance of the system. Therefore, this paper puts forward an effective hybrid PAPR reduction method to reduce the high PAPR of the UFMC system. The proposed hybrid scheme consists of a combination of precoding and nonlinear companding techniques (NLCTs). A comparative analysis of the performance of different precoding methods, NLCTs, and hybrid methods are investigated in terms of the cumulative distribution function of the PAPR and the bit error rate (BER). The simulation results show that the proposed hybrid UFMC system has better PAPR reduction performance compared to conventional NLC and precoded UFMC systems. Moreover, the BER analysis of the UFMC system verifies that the proposed hybrid technique shows better BER performance compared to conventional companding techniques.INDEX TERMS Peak-to-average power ratio (PAPR), precoding techniques, non-linear companding techniques, hybrid PAPR reduction techniques, universal filtered multi-carrier (UFMC), 5G.

An optimal nonlinear companding transform with clipping scheme for universal filtered multicarrier systems

“…The proposed optimal hybrid transforms are compared with various companding schemes in the literature, such as DFT‐ARCT and DFT‐ μ ‐law 19 of UFMC system, ICF‐ENC (iterative clipping and filtering‐enhanced nonlinear companding) and ENC 29 of OFDM system, and μ ‐law 30 of OFDM system, as illustrated in Table 5. It is evident that from Table 5, the proposed hybrid scheme with CR = 1.3 offers improved PAPR reduction of 8.4 dB at CCDF = 10 −3 when compared with other companding schemes.…”

“…However, there are very few studies on the reduction of PAPR in UFMC systems. For example, a partial transmit sequence (PTS) scheme, 7 hybrid advanced rooting companding technique (ARCT) 19 were proposed for UFMC systems.…”

Reduced OoB Emission and PAPR Using Partial-OSLM technique in 5G UFMC Systems

“…The signal can be easily recovered at the receiver end by using the inverse transform function before the signal passes through any other operation. Mu-Law companding can be expressed as in [12].…”

“…Several techniques have been used to reduce the value of PAPR, such as clipping, precoding, companding, and selective mapping (SLM) techniques. Companding technique can be used in the UFMC system because it is an easy and less complex PAPR reduction [12]. Mu-Law companding technique is based on compressing the large signals and expanding the small signals to protect the small signals from noise.…”

“…Each data block has the same information of the original data block. The technique selects the block which has the least PAPR for transmission [12]- [14].…”