An overview of multi-carrier CDMA

Prasad, Ramjee; Hara, Shinsuke

doi:10.1109/isssta.1996.563752

Cited by 283 publications

(84 citation statements)

References 11 publications

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“…Because of the immaturity of current optical communication technology for long distance purpose and relatively simple reflector shape, large reflector antenna is commonly used in deep space exploration ground stations home and abroad. There are many different reflector antennas of single-reflector, dual-reflectors and array-reflectors consisting of some smaller reflectors [2][3][4][5][6] . The antenna of dual-reflectors in American is shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

The Design and Simulation Analysis of K Band Large Reflector Antenna System for Deep Space Exploration

Song¹,

Kong²

2017

dtcse

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Section: Introductionmentioning

confidence: 99%

The Design and Simulation Analysis of K Band Large Reflector Antenna System for Deep Space Exploration

Song¹,

Kong²

2017

dtcse

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“…Recently, MC-CDMA (Multi-Carrier Code Division Multiple Access) has attracted significant research interest as potential air-interface for 4G cellular systems [1]. MC-CDMA is a diversity based transmission scheme, which simultaneously harnesses the advantages of OFDM (Orthogonal Frequency Division Multiplexing) and CDMA (Code Division Multiple Access).…”

Section: Introductionmentioning

confidence: 99%

Joint Rate and Power Adaptation for MC-CDMA over Tempo-Spectral Domain

Hamid

Hoshyar

Tafazolli

2008

2008 IEEE Wireless Communications and Networking Conference

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Abstract-This paper studies the area of link adaptation for multicarrier code division multiple access (MC-CDMA) radio interface and adapts the rate and transmission power jointly over temporal as well as spectral domains. On one side, frequency domain spreading lends a high degree of frequency diversity to MC-CDMA. On the other, it has been identified as the main hurdle when it comes to spectral domain rate allocation in MC-CDMA. This paper presents band based MC-CDMA (BB-MC-CDMA) architecture as an efficient scheme to practically realize the spectral domain rate allocation in MC-CDMA, without undergoing the drawbacks of other published techniques for this purpose. BB-MC-CDMA asks for the elimination of frequency interleaving, usually considered to be an essential ingredient of MC-CDMA. It also suggests an intelligent reduction in the spreading factor in a channel aware fashion. Furthermore, based on BB-MC-CDMA architecture, joint rate and power adaptation over time and frequency (JRPATF) has been shown to outperform the frequency domain power allocation only.

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“…Recently several CDMA combined OFDM (OFDM/CDMA) systems have been developed [3]- [5]. In multi-carrier CDMA (MC-CDMA) using frequency domain spreading, the effect of frequency diversity can be obtained.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of OFDM/CDMA System Using Frequency and Time Domain Spreading

Tachikawa

Ueki

2006

2006 IEEE Ninth International Symposium on Spread Spectrum Techniques and Applications

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Abstract-This paper presents BER performances of OFDM/ CDMA using combined frequency and time domain spreading (abbreviated as FT-CDMA). In the system, we employ a different frequency interleaver for each user and adaptive filters to suppress multiple access interference in an asynchronous multiple access system. In conventional MC-CDMA and MC-DS/ CDMA systems, the improvement of BER performance can be obtained from only frequency or time domain however, in the FT-CDMA, it can be obtained from both domains. The performance are evaluated in a multi-path fading channel (a close 6-path model). As a result of computer simulations, it is shown BER performance of FT-CDMA is superior to that of the others in the channel.Keywords-OFDM/CDMA, frequency and time domain spreading, frequency interleaver, adaptive filter, multi-path fading channel

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An overview of multi-carrier CDMA

Cited by 283 publications

References 11 publications

The Design and Simulation Analysis of K Band Large Reflector Antenna System for Deep Space Exploration

The Design and Simulation Analysis of K Band Large Reflector Antenna System for Deep Space Exploration

Joint Rate and Power Adaptation for MC-CDMA over Tempo-Spectral Domain

Characteristics of OFDM/CDMA System Using Frequency and Time Domain Spreading

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