A new method of suppressing ISI for indoor wireless communications

Author

Hao, Xuefei ; Hu, Dongwei ; Chen, Jie ; Suehiro, Naoki

Author_Institution

SOC Lab. of Microelectron. Inst., Chinese Acad. of Sci., Beijing, China

fYear

2004

fDate

18-19 Nov. 2004

Firstpage

696

Lastpage

699

Abstract

This paper presents a new method of suppressing intersymbol interference (ISI) for indoor wireless communications in Rayleigh fading channels. In this system, we introduce a 16-ary quadrature amplitude modulation (16QAM) digital model which is spread spectrum with orthogonal Hadamard matrix row vector inserted zeros. This method not only can reduce the ISI resulting from multipath fading channels, but also can lower the peak to average-power ratio (PAPR) problem. On the other hand, the least square (LS) channel estimator has been introduced in order to achieve a better performance. Furthermore, the system performance has been analyzed and computer simulated.

Keywords

Hadamard matrices; Rayleigh channels; channel estimation; indoor radio; intersymbol interference; multipath channels; quadrature amplitude modulation; spread spectrum communication; 16QAM; DSSS; ISI suppression; MQAM; Rayleigh fading channel; direct sequence spread spectrum; indoor wireless communications; intersymbol interference; least square channel estimator; multilevel quadrature amplitude modulation; multipath fading channel; orthogonal Hadamard matrix row vector inserted zeros; peak to average-power ratio; spread sequence codes; Computational modeling; Fading; Intersymbol interference; Least squares approximation; Peak to average power ratio; Performance analysis; Quadrature amplitude modulation; Spread spectrum communication; System performance; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Intelligent Signal Processing and Communication Systems, 2004. ISPACS 2004. Proceedings of 2004 International Symposium on

Print_ISBN

0-7803-8639-6

Type

conf

DOI

10.1109/ISPACS.2004.1439148

Filename

1439148