[BSR16b] Reducing the PAPR in FBMC-OQAM systems with Low Latency Trellis-based SLM Technique
Revue Internationale avec comité de lecture :
Journal EURASIP Journal on Advances in Signal Processing
Mots clés: 5G; Dynamic programming; computational complexity; FBMC-OQAM; PAPR; SLM; trellis-based
Filter-bank multi-carrier (FBMC) modulations, and more specifically FBMC-offset quadrature amplitude modulation (OQAM), are seen as an interesting alternative to OFDM for 5th generation radio access technology. In this paper, we investigate the problem of PAPR reduction for FBMC-OQAM signals. Recently, it has been shown that FBMC-OQAM with trellis-based selected mapping (TSLM) scheme is not only superior
to any scheme based on symbol-by-symbol approach, but also outperforms that of the OFDM with classical SLM scheme. This paper is an extension of that work, where, we analyze the TSLM in terms of computational complexity, required hardware memory and latency issues. We have proposed an improvement to the TSLM, which requires very less hardware memory, compared to the originally proposed TSLM and also have
low latency. Additionally, the impact of time duration of partial PAPR on the performance of TSLM is studied and its lower bound has been identified by proposing suitable time duration. Also a thorough and fair comparison of performance has been done with an existing trellis-based scheme proposed in literature. The simulation results show that the proposed low latency TSLM yields better PAPR reduction
performance with relatively less hardware memory requirements.