Title :
A compensating method based on SOM for nonlinear distortion in 16 QAM-OFDM system
Author :
Wang, Xiaoqiu ; Lu, Jianming ; Sekiya, Hiroo ; Yahagi, Takashi
Author_Institution :
Graduate Sch. of Sci. & Technol., Chiba Univ., Japan
Abstract :
This work presents a compensating method based on a self-organizing map (SOM) of nonlinear distortion, which is caused by the high-power amplifier (HPA) in 16 QAM-OFDM systems. OFDM signals are sensitive to nonlinear distortions and different methods are studied to limit them. In the proposed scheme, the correction is done at the receiver by a SOM algorithm. Simulations are carried out considering an additive white Gaussian noise (AWGN) transmission channel. Simulation results show that the SOM algorithm brings perceptible gains in a complete 16 QAM-OFDM system.
Keywords :
AWGN channels; OFDM modulation; compensation; linearisation techniques; nonlinear distortion; quadrature amplitude modulation; radio receivers; self-organising feature maps; AWGN; QAM-OFDM systems; additive white Gaussian transmission channel; high-power amplifier; nonlinear distortion SOM; nonlinear distortion compensating method; nonlinear distortion receiver correction; self-organizing map; AWGN; Amplitude modulation; Equalizers; Frequency division multiplexing; High power amplifiers; Neurons; Nonlinear distortion; OFDM modulation; Peak to average power ratio; Phase modulation;
Conference_Titel :
Multimedia and Expo, 2004. ICME '04. 2004 IEEE International Conference on
Print_ISBN :
0-7803-8603-5
DOI :
10.1109/ICME.2004.1394630
