DS-CDMADirect Sequence Code Division Multiple Access
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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].
Tal, "Maximizing delay-constrained throughput in multi-channel DS-CDMA ALOHA networks through power diversity and successive decoding," Wireless Networks, vol.
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.
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.
The network, which will become the first in Russia to utilise Lucent's CDMA wireless subscriber access system, will use DS-CDMA technology in the 3.
Figure 4 compares the lower and upper bounds on RS-coded BEP for DB sequences and Gold codes, assuming 4 users in the DS-CDMA system, and RS(31,23) coding.
In the case of chaotic spreading sequences with the length of more than 60 chips, the multiple-access interference in multi-user DS-CDMA communication systems can be considered as Gaussian random variable.
In [21], the code mapping theory is mainly applied into the design of g-Level complex m sequence in DS-CDMA systems.
In DS-CDMA based systems user data bits are multiplied by the spreading code bits called chips.
Was awarded a two-year Small Business Innovative Research (SBIR) Phase II contract in the amount of $399,791 to continue development of a new Data Collection Platform with Interrogate Capability (DCPI) employing DS-CDMA RF transmission techniques allowing two-way communications through the GOES Satellite System.
In August, Sutron received a Small Business Innovative Research (SBIR)--Phase II contract for approximately $400,000 to continue development of a new DCPI (Data Collection Platform with Interrogate Capability) employing DS-CDMA RF transmission techniques allowing two-way communications through the GOES Satellite System.