A performance improvement of COFDM system with pseudorandom sequence processing technique

Author

Cao, Zhigang ; Fan, Da ; Fan, Pingyi

Author_Institution

Dept. of Electron. Eng., Tsinghua Univ., Beijing, China

Volume

2

fYear

2005

Firstpage

1017

Abstract

OFDM based on cyclic prefix (CP) or zero-padding (ZP) is suitable for wireless communications due to its suppression of the multipath fading and resistance to inter-symbol interference (ISI). However, it does not make the simple FFT-based receiver perform well. ISI can be further suppressed by the pseudorandom sequence processing technique which changes the correlation properties of the IFFT matrix [P. D. Papadimitriou et al. (2004)]. This paper analyses this technique theoretically and applies to CP-OFDM, ZP-OFDM, ZP-OFDM-OLA and ZP-OFDM-FAST. Simulation results verify the large gains in the coded performance of the modified methods using this technique, compared to the conventional methods.

Keywords

OFDM modulation; correlation methods; fast Fourier transforms; matrix algebra; modulation coding; radiocommunication; random sequences; COFDM; FFT-based receiver; IFFT matrix; ISI; ZP-OFDM-FAST; ZP-OFDM-OLA; correlation property; intersymbol interference; orthogonal frequency-division multiplexing; pseudorandom sequence processing technique; wireless communication; zero padding method; Bit error rate; Digital communication; Digital video broadcasting; Fading; Intersymbol interference; Laboratories; OFDM; Random sequences; Telecommunication standards; Wireless communication; BER; CSI; OFDM; correlation properties; m sequence; pseudorandom sequence;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, 2005. MAPE 2005. IEEE International Symposium on

Print_ISBN

0-7803-9128-4

Type

conf

DOI

10.1109/MAPE.2005.1618092

Filename

1618092