DocumentCode
2220563
Title
Effects of Group Delay on the Performance of OFDM System
Author
Gao, Chunyan ; Cao, Xiuying
Author_Institution
Nat. Mobile Commun. Res. Lab., Southeast Univ., Nanjing, China
fYear
2009
fDate
26-28 Dec. 2009
Firstpage
2618
Lastpage
2621
Abstract
In OFDM transmission schemes, orthogonality of the sub-carriers is essential for correct demodulation. However, the non-constant group delay induced by RF cables, amplifiers, and mixers destroys the orthogonality of the sub-carriers and causes a large bit error rate (BER). In this paper, we focus on the effects of group delay on OFDM signals and then simulate the BER degradation, caused by different type of group delay (linear and parabolic), for OFDM signals using QPSK and 16QAM modulation.
Keywords
OFDM modulation; amplifiers; delays; demodulation; error statistics; mixers (circuits); quadrature amplitude modulation; quadrature phase shift keying; 16QAM modulation; BER; OFDM transmission; QPSK; RF cables; amplifiers; bit error rate; correct demodulation; group delay; mixers; sub-carrier orthogonality; Bit error rate; Cables; Degradation; Delay effects; Delay lines; Demodulation; OFDM; Quadrature phase shift keying; Radio frequency; Radiofrequency amplifiers;
fLanguage
English
Publisher
ieee
Conference_Titel
Information Science and Engineering (ICISE), 2009 1st International Conference on
Conference_Location
Nanjing
Print_ISBN
978-1-4244-4909-5
Type
conf
DOI
10.1109/ICISE.2009.532
Filename
5455048
Link To Document