An improved detection method for OFDM signals

Author

Lingling Cui ; Biao Huang ; Jian Fang ; Tingting Wang

Author_Institution

Hebei Univ. of Technol., Tianjin, China

fYear

2011

fDate

14-16 Oct. 2011

Firstpage

135

Lastpage

139

Abstract

OFDM has become the main basic transmission technology replacing single carrier spread spectrum techniques in the new generation broadband wireless communication, spectrum detecting of OFDM signals has developed rapidly in the field of Cognitive radio. In the OFDM system, there is a great correlation between CP and OFDM symbols which are introduced for eliminating ISI, so the detection methods based on CP can be implemented on effective perception of OFDM signals, but the multipath effects will reduce the performance of the detection. The article obtains the optimum length of correlation window to operate correlation detection through the estimation of multipath channel, the method can improve the detection performance effectively that is verified by simulation.

Keywords

OFDM modulation; cognitive radio; intersymbol interference; multipath channels; signal detection; wireless channels; ISI elimination; OFDM signal; broadband wireless communication; cognitive radio; correlation window; cyclic prefix; detection method; multipath channel; optimum length; spectrum detection; CP; OFDM; channel estimate; spectrum sensing;

fLanguage

English

Publisher

iet

Conference_Titel

Communication Technology and Application (ICCTA 2011), IET International Conference on

Conference_Location

Beijing

Type

conf

DOI

10.1049/cp.2011.0646

Filename

6192842