Title :
Reducing specific inter-symbol interference of constant envelope OFDM system through optimizing zero-padding pattern
Author :
Liu, Zujun ; Wang, Jieling ; Tian, Hongxin ; Yi, Kechu
Author_Institution :
State key Lab. of Integrated Services Networks, Xidian Univ., Xi´´an, China
Abstract :
The application of phase modulation in Constant-Envelope Orthogonal Frequency Division Multiplexing (CE-OFDM) system transforms OFDM signal to a signal with a unity PAPR and exploits frequency diversity, but also induces one specific kind of inter-symbol interference (ISI). In this paper, the expression of such kind of ISI is defined, and indicates that the ISI is dependent on the zero-padding pattern. Hence a method is proposed to reduce such kind of ISI through optimizing zero-padding pattern. Simulation results show that the proposed optimization method can bring obvious BER performance improvement.
Keywords :
OFDM modulation; error statistics; intersymbol interference; optimisation; phase modulation; BER performance; OFDM signal; constant envelope OFDM system; frequency diversity; intersymbol interference; optimization; orthogonal frequency division multiplexing; phase modulation; unity PAPR; zero-padding pattern; Bit error rate; Frequency diversity; Frequency domain analysis; Optimization; Peak to average power ratio; Phase modulation; Constant Envelope OFDM(CE-OFDM); Inter-symbol interference (ISI); Optimization; Zero-padding;
Conference_Titel :
Signal Processing, Communications and Computing (ICSPCC), 2011 IEEE International Conference on
Conference_Location :
Xi´an
Print_ISBN :
978-1-4577-0893-0
DOI :
10.1109/ICSPCC.2011.6061665
