Results 161 to 170 of about 122,557 (242)
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DS-CDMA, MC-CDMA and MT-CDMA for mobile multi-media communications
Proceedings of Vehicular Technology Conference - VTC, 2002We present a comparison between direct sequence code division multiple access (DS-CDMA), multi-carrier (MC-) CDMA and multitone (MT-) CDMA schemes in terms of the transmitter and receiver structure. We discuss their down-link bit error rate performance in a frequency selective Rayleigh fading channel by computer simulation.
S. Hara, R. Prasad
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Analysis of Space & Time Complexity with PSO Based Synchronous MC-CDMA System
2019 2nd International Conference on Computing, Mathematics and Engineering Technologies (iCoMET), 2019A layout for high data rate self-actualization is proposed that is the solution study regions of the upcoming time’s frameworks. The most grounded structures for satisfying the demand for high data of upcoming time-period systems are the Multi-Carrier ...
Muhammad Asif +3 more
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5th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, Wireless Networks - Catching the Mobile Future., 2002
The multiple access schemes TDMA and CDMA are compared and evaluated with respect to the demands on third generation mobile radio systems such as high capacity and flexibility. Further, an approach to evolve GSM towards third generation mobile radio systems by introducing an optional CDMA component is presented.
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The multiple access schemes TDMA and CDMA are compared and evaluated with respect to the demands on third generation mobile radio systems such as high capacity and flexibility. Further, an approach to evolve GSM towards third generation mobile radio systems by introducing an optional CDMA component is presented.
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An overview of CDMA evolution toward wideband CDMA
IEEE Communications Surveys & Tutorials, 1998Third-generation mobile radio networks, often dubbed as 3G, have been under intense research and discussion recently and will emerge around the year 2000. In the International Telecommunications Union (ITU), third generation networks are called International Mobile Telecommunications-2000 (IMT-2000), and in Europe, Universal Mobile Telecommunications ...
Ramjee Prasad, Tero Ojanpera
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A survey on CDMA: evolution towards wideband CDMA
1988 IEEE 5th International Symposium on Spread Spectrum Techniques and Applications - Proceedings. Spread Technology to Africa (Cat. No.98TH8333), 2002This paper presents an overview of CDMA and discusses the main features of the future air interface access schemes namely WCDMA and CDMA2000, for IMT-2000/UMTS. Multiple access schemes and CDMA classification are introduced. CDMA past, present and future activities are presented, and the concepts and elements of CDMA are explained.
R. Prasad, T. Ojanpera
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Frequency coordination between CDMA and non-CDMA systems
Proceedings of 1995 IEEE MTT-S International Topical Symposium on Technologies for Wireless Applications (Conjunction with INTER COMM'95), 2002Mutual interference between non-CDMA (FM and TDMA) subscriber stations (SS) and CDMA base stations (BS), as well as interference between CDMA SS and non-CDMA BS are investigated. The noise figure is used as a measure of degradation of the receiver performance.
S. Soliman, C. Wheatley
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Performance of UWB DS-CDMA/OFDM/ MC-CDMA system
The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04., 2004In this paper, we purports to compare ultra-wide band (UWB) DS-CDMA with OFDM system, both of which are currently drafted in standardization. Although MC-CDMA is not in standard, this paper proposes that it is a potential candidate for standardization because MC-CDMA may provide certain qualities that the other system may not support.
null Yong-Bae Park +6 more
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Hybrid ISMA/CDMA and CDMA/ISMA protocols for IWCC
Proceedings of ICUPC '95 - 4th IEEE International Conference on Universal Personal Communications, 2002This paper presents a novel multiple access scheme, which is a combination of inhibit sense multiple access (ISMA) and code division multiple access (CDMA), for the indoor wireless computer communications (IWCC). This new multiple access scheme is called hybrid ISMA/CDMA protocol.
F. Harmsze, R. Prasad
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Group-orthogonal multi-carrier CDMA
MILCOM 2002. Proceedings, 2003Code division multiple access (CDMA) over frequency-selective fading channels faces challenges in suppressing multiuser interference (MUI), but can also benefit from the channel-induced multipath diversity. On the other hand, uncoded orthogonal frequency division multiple access (OFDMA) is MUI-free by design, but faces challenges arising from the ...
X. Cai, S. Zhou, G.B. Giannakis
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