DS-CDMADirect Sequence Code Division Multiple Access
References in periodicals archive ?
Morelli, "Channel Estimation for the Uplink of a DS-CDMA System", IEEE Trans.
Considering a direct sequence code division multiple access system (DS-CDMA), signal [x.sub.k] = [[x.sub.k](1) ...
Several papers have analysed performance of DS-CDMA systems based on cooperative diversity in which direct transmission is considered in addition to two-hop relaying over different fading channels such as Rayleigh, Nakagamim and frequency selective fading channels [8]-[17].
Saragih and F.Santoso, "Capture delay analysis on the throughputs of direct-sequence code division multiple access (DS-CDMA) with slotted-ALOHA (S-ALOHA) systems over Nakagami/Nakagami fading channels," International Journal of Wireless Information Networks, vol.
Vempati et al., "Multiuser detection for DS-CDMA systems over Nakagami-m fading channels using particle swarm optimization," in Proceedings of the IEEE 9th International Colloquium on Signal Processing and its Applications (CSPA '13), pp.
Ohgane, "A base station adaptive antenna for downlink transmission in a DS-CDMA system," in Proceedings of the IEEE 51st Vehicular Technology Conference (VTC'00), vol.
The proposed Adaptive MMSE-MRC algorithm is applied to the downlink (base station to mobile) of DS-CDMA system.
The paper is organized as follows; Section 2 introduces a full description the [lambda]-MRC applied for the decode-and-forward cooperative systems, Section 3 discusses the proposed practical receiver and the employed dynamic-blind estimation of the combiner's weight [lambda], Section 4 investigates an actual implementation of a DS-CDMA decode-and-forward cooperative transmission, Section 5 display the simulation results, and Section 6 is the paper conclusions.
En consideraciones de diseno y simulacion, si el ancho de banda de la senal de banda base es mucho mas grande que [B.sub.D], los efectos del Doppler spread seran insignificantes en el receptor, lo que es una gran ventaja para los sistemas de espectro expandido como DS-CDMA. Por otro lado, al considerar el tiempo coherente representado en la ecuacion [8] como una medida estadistica de la duracion temporal sobre la cual la respuesta al impulso del canal es esencialmente invariante, este cuantificara la similitud de la respuesta del canal en diferentes tiempos, es decir, el tiempo de duracion sobre el cual dos senales recibidas tienen alta correlacion.
Lucent Technologies has won a deal to construct a DS-CDMA (Direct Sequence Code Division Multiple Access) fixed-wireless communications network in Moscow and St.
The objective of this paper is to show the effect of imperfect channel estimation on the performance of chaos based DS-CDMA system in flat fading environment which can be extended for binary spreading sequence also.
Based on the above premises, this paper analyses the performance obtainable in a Direct Sequence Code Division Multiple Access (DS-CDMA) system, on a multipath channel, where non-linear binary sequences exhibiting the ZCZ property are chosen as spreading codes.