Combined Data Detection Scheme for Zero-Padded OFDM Signals in MMF Links

Abstract

Medina Sevila, P.; Almenar Terre, V.; Corral, JL. (2015). Combined data detection scheme for zero-padded OFDM signals in MMF links. IEEE Photonics Technology Letters. 27(16):1753-1756. doi:10.1109/LPT.2015.2439158. 1 Abstract-In this paper, we propose a receiver scheme for zero padding orthogonal frequency division multiplexing (ZP-OFDM) that combines low complexity from Overlap-and-Add (OLA) equalizer and low error rate provided by successive interference cancellation (SIC) data detection from optimal ordering Vertical Bell Laboratories Layered Space-Time (V-BLAST) architecture. Results of numerical simulations on multi-mode optical fiber links show that the proposed scheme improves the error rate performance of zero forcing equalization (ZF) receiver, reaching results similar to V-BLAST. For example, the proposed scheme can reach 33.9 Gb/s in a 600 m link, whereas the ZF receiver would reach 29.06 Gb/s and cyclic prefix OFDM only 19.37 Gb/s. These results are obtained with a reduction in computational complexity (measured in number of real products) of 86% in detection and 66% in preprocessing with respect to the ZF receiver, and 44% and 86% with respect to the V-BLAST receiver.