Title :
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
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;
Conference_Titel :
Intelligent Signal Processing and Communication Systems, 2004. ISPACS 2004. Proceedings of 2004 International Symposium on
Print_ISBN :
0-7803-8639-6
DOI :
10.1109/ISPACS.2004.1439148
