MAP Detection of Nonlinearly Distorted OFDM Signals

Author

Gupta, Ashish ; Reeder, Jekaterina ; Behravan, Ali ; Eriksson, Thomas

Author_Institution

Dept. of Signals & Syst., Chalmers Univ. of Technol., Goteborg

Volume

4

fYear

2006

fDate

14-19 May 2006

Abstract

This paper presents the maximum a posteriori (MAP) detector for a multicarrier system with nonlinearity at the transmitter front-end. The analysis is based on block detection of multicarrier symbols. Since implementation of the MAP detector for a system with a large number of subcarriers is far too complex, a sub-optimum algorithm that can be implemented with acceptable complexity is also presented. It will be shown that when the nonlinearity distortion dominates the channel noise, without knowledge of the nonlinearity, the proposed detector outperforms the conventional ML detector

Keywords

OFDM modulation; maximum likelihood detection; nonlinear distortion; MAP detection; block detection; channel noise; maximum a posteriori detector; multicarrier system; nonlinearity distortion; nonlinearly distorted OFDM signals; transmitter front-end; AWGN channels; Additive white noise; Baseband; Detectors; Gaussian noise; Interference; Nonlinear distortion; OFDM; Signal design; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech and Signal Processing, 2006. ICASSP 2006 Proceedings. 2006 IEEE International Conference on

Conference_Location

Toulouse

ISSN

1520-6149

Print_ISBN

1-4244-0469-X

Type

conf

DOI

10.1109/ICASSP.2006.1661056

Filename

1661056