Spreading code allocation strategy for downlink multicarrier code division multiple access transmission in a correlated Rayleigh fading channel
نویسندگان
چکیده
منابع مشابه
Spreading code allocation strategy for downlink multicarrier code division multiple access transmission in a correlated Rayleigh fading channel
In this paper, we address the problem of multiple access interference (MAI) in a downlink multicarrier code division multiple access system. Because in the realistic case of correlated faded subcarriers, MAI greatly depends on the codes assigned to users, one way of improving performance without increasing receiver complexity consists in an appropriate code selection. We propose a code allocati...
متن کاملChannel identification using chaos for an uplink/downlink multicarrier code division multiple access system
HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau...
متن کاملDelay-time/Code Division Multi-access for Uplink Transmission In A Frequency-selective Fading Channel
The downlink bit error rate (BER) performance of direct sequence-code division multi-access (DS-CDMA) in a frequency-selective fading channel can be significantly improved by the use of frequency-domain equalization (FDE) based on minimum mean square error (MMSE) criterion. In the uplink case, however, the presence of multi-access interference (MAI) significantly degrades the BER performance ev...
متن کاملCode Division Multiple Access
1 CDMA Concept 4 1.1 Basic Principles of Spread Spectrum . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.1.1 Direct Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.1.2 Frequency Hopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1.1.3 Time Hopper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.1.4 Hybrid Systems . ....
متن کاملMultirate transmission in frequency-hopping multicarrier direct sequence code division multiple access systems
| Against the back-cloth of the explosive expansion of the Internet and the continued dramatic increase in demand for high-speed multimedia wireless services, there is an urging demand for exible, broadband transceivers. A versatile broadband multiple access scheme, combining frequency-hopping (FH) with multicarrier DSCDMA (FH/MC DS-CDMA) is proposed and investigated. The FH/MC DS-CDMA scheme i...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Wireless Communications and Mobile Computing
سال: 2012
ISSN: 1530-8669
DOI: 10.1002/wcm.2222