Title :
Performance of only-phase equalization in OFDM with soft decoding in indoor environment
Author :
Obiedat, Esam A. ; Asir, Bassam R. ; Khalaf, Loay D.
Author_Institution :
Jordan Univ. of Sci. & Technol., Irbid, Jordan
Abstract :
In this paper, we investigate the performance of frequency domain equalization in conjunction with Soft Decision (SD) Viterbi decoding in the Orthogonal Frequency Division Multiplexing (OFDM) systems. Specifically, we compare the performance of two frequency domain equalization methods, one using complete phase and magnitude equalization of complex Quadrature Amplitude Modulated (QAM) symbols, while the other using only-phase equalization, or constellation rotation. Our investigation shows that the OFDM system using only-phase equalization in conjunction with soft decision decoding for convolutional codes has a better performance of about 2.5-4 dB in multipath environment than the system implementing complete equalization with the same soft decision decoding at 10-4 BER level.
Keywords :
OFDM modulation; convolutional codes; decoding; equalisers; error statistics; OFDM systems; QAM symbols; SD Viterbi decoding; complex quadrature amplitude modulated symbols; constellation rotation; convolutional codes; frequency domain equalization methods; indoor environment; magnitude equalization; multipath environment; only-phase equalization; orthogonal frequency division multiplexing; soft decision decoding; soft decoding; Channel estimation; Channel models; Decision feedback equalizers; Maximum likelihood decoding; OFDM; Viterbi algorithm;
Conference_Titel :
GLOBECOM Workshops (GC Wkshps), 2011 IEEE
Conference_Location :
Houston, TX
Print_ISBN :
978-1-4673-0039-1
Electronic_ISBN :
978-1-4673-0038-4
DOI :
10.1109/GLOCOMW.2011.6162357
