Publicação
Capacity enhancement of DS-CDMA synchronous channels by frequency-shift filtering
| Resumo: | We present a technique based on the cyclostationary properties of data signals that allows direct sequence spread-spectrum (DS-SS) code division multiple access (CDMA) system. The doubling is achieved with a moderate increase in bandwidth relatively to the original system or equivalently with a reduction when compared to the conventional approach of doubling the code length to duplicate the number of channels. The proposal makes use of two sets of DS-SS signals modulated by two carriers separated by a fraction of the the chip rate. The synchronous condition ensures cyclostationarity of the received signals, allowing the design of a receiver that explores the correlation between nonoverlapping frequency bands to cancel the inter-set interference |
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| Autores principais: | Gameiro, A. |
| Assunto: | 3G mobile communication Bandwidth Downlink Filtering Frequency Interference cancellation Multiaccess communication Proposals Signal processing Spread spectrum communication |
| Ano: | 2000 |
| País: | Portugal |
| Tipo de documento: | documento de conferência |
| Tipo de acesso: | acesso restrito |
| Instituição associada: | Universidade de Aveiro |
| Idioma: | inglês |
| Origem: | RIA - Repositório Institucional da Universidade de Aveiro |
| Resumo: | We present a technique based on the cyclostationary properties of data signals that allows direct sequence spread-spectrum (DS-SS) code division multiple access (CDMA) system. The doubling is achieved with a moderate increase in bandwidth relatively to the original system or equivalently with a reduction when compared to the conventional approach of doubling the code length to duplicate the number of channels. The proposal makes use of two sets of DS-SS signals modulated by two carriers separated by a fraction of the the chip rate. The synchronous condition ensures cyclostationarity of the received signals, allowing the design of a receiver that explores the correlation between nonoverlapping frequency bands to cancel the inter-set interference |
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