Title :
Compensation in frequency domain for HPA nonlinearity in MIMO OFDM systems using MMSE receiver
Author :
Cherif Dakhli, Maha ; Zayani, R. ; Bouallegue, R.
Author_Institution :
Innov´Com Lab., Univ. of Carthage, Tunis, Tunisia
Abstract :
This paper presents a compensating method based on Neural Network (NN) of Non-Linear (NL) distortion, which caused by High Power Amplifier (HPA) in Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing (MIMO OFDM) systems. In this work, we present and we evaluate with simulation, the effect of nonlinearity on the system capacity and the performance of NN compensator in frequency domain accompanied with Minimum Mean Square Error (MMSE) receiver in a VBLAST (Vertical Bell Laboratories Layered Space-Time) MIMO OFDM systems running under a Rayleigh fading channel.
Keywords :
MIMO communication; OFDM modulation; Rayleigh channels; compensation; frequency-domain analysis; least mean squares methods; neural chips; nonlinear distortion; power amplifiers; radio receivers; space-time codes; HPA nonlinearity; MMSE receiver; NL distortion; NN compensator; Rayleigh fading channel; VBLAST; compensation; frequency domain; high power amplifier; minimum mean square error; multiple-input multiple-output orthogonal frequency division multiplexing; neural network; nonlinear distortion; system capacity; vertical Bell Laboratories layered space-time MIMO OFDM system; HPA; MIMO; MLP; MMSE; NEURAL NETWORK; OFDM; VBLAST;
Conference_Titel :
Signal Processing (ICSP), 2012 IEEE 11th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4673-2196-9
DOI :
10.1109/ICoSP.2012.6491808
