Joint synchronization estimation based on genetic algorithm for OFDM/OQAM systems

Abstract

This paper investigates the problem of synchronization for offset quadrature amplitude modulation based orthogonal frequency division multiplexing (OFDM/OQAM) systems based on the genetic algorithm. In order to increase the spectrum efficiency, an improved preamble structure without guard symbols is derived at first. On this basis, instead of deriving the log likelihood function of power spectral density, joint estimation of the symbol timing offset and carrier frequency offset based on the preamble proposed is formulated into a bivariate optimization problem. After that, an improved genetic algorithm is used to find its global optimum solution. Conclusions can be drawn from simulation results that the proposed method has advantages in the joint estimation of synchronization.

Genetic algorithm based active fault-tolerant control system for air fuel ratio control of internal combustion engines

“…Due to its impressive performance, GA is widely used in optimization and classification problems ranging from fault diagnosis in PV cells, 33 OFDM and OQAM synchronization estimation, 34 OFDM modulation, 35 classification problem solving, 36 hyperparameter optimization of power amplifiers, 37 optimal resource allocation in cloud computing, 38 linear array antenna designing, 39 robotic locomotion optimization, 40 compressor-based system’s slow speed characteristics estimation, 41 and many more similar problems. In this study, we are using the genetic algorithm to predict the estimated values in case of a faulty MAP or throttle sensor in an AFTCS.…”

SC-FDE timing synchronization improvement algorithm based on genetic algorithm

“…Underwater acoustic communication is playing an increasingly important role in marine engineering, but underwater acoustic channels have a multipath fading effect, causing intersymbol interference. In order to combat frequency selective fading and overcome the effects of multipath transmission, orthogonal frequency division multiplexing (OFDM) and single-carrier frequency domain equalization (SC-FDE) techniques have be used [1][2][3][4] . SC-FDE has similar complexity to OFDM, while retaining the advantages of a low peak-to-average power ratio (PAPR) of a single-carrier signal, reducing sensitivity to phase noise and frequency shift, so it can be applied to underwater acoustic communications [5][6][7][8][9] .…”