Overview of multicarrier CDMA

Hara, Shinsuke; Prasad, Ramjee

doi:10.1109/35.642841

Cited by 1,762 publications

(856 citation statements)

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“…Therefore, each user transmits with a lower PAPR (PAPR increases with the number of subcarriers), and also with far lower total power than if it had to transmit over the entire bandwidth. Lower data rates and bursty data are handled much more efficiently in OFDMA than in single user OFDM, or with TDMA or CDMA, since rather than having to blast at high power over the entire bandwidth, OFDMA allows the same data rate to be sent over a longer period of time using the same total power [13], [14].…”

Section: A Advantages Of Ofdmamentioning

confidence: 99%

Narrowband Interference Suppression in Wireless OFDM Systems

Nikolova

Iliev

Ovtcharov

et al. 2009

African Journal of ICT

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Abstract-Signal distortions in communication systemsoccur between the transmitter and the receiver; these distortions normally cause bit errors at the receiver. In addition interference by other signals may add to the deterioration in performance of the communication link. In order to achieve reliable communication, the effects of the communication channel distortion and interfering signals must be reduced using different techniques. The aim of this paper is to introduce the fundamentals of Orthogonal Frequency Division Multiplexing (OFDM) and Orthogonal Frequency Division Multiple Access (OFDMA), to review and examine the effects of interference in a digital data communication link and to explore methods for mitigating or compensating for these effects.

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Section: A Advantages Of Ofdmamentioning

confidence: 99%

Narrowband Interference Suppression in Wireless OFDM Systems

Nikolova

Iliev

Ovtcharov

et al. 2009

African Journal of ICT

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“…Single-carrier (SC) signal transmission technique, such as DS-CDMA with coherent rake combining used in the present 3G systems [1], provides very poor performance because of strong inter-chip interference (ICI) resulting from severe frequency-selectivity of the channel. Therefore, multi-carrier CDMA (MC-CDMA) with frequencydomain equalization (FDE) [5]- [7] has long been considered as a broadband multiple access technique since it can take advantage of channel frequency-selectivity to improve the transmission performance. Special cases of DS-CDMA and MC-CDMA are non-spread SC multiple access and orthogonal frequency division multiple access (OFDMA), respectively.…”

Section: Introductionmentioning

confidence: 99%

Introduction of Frequency-Domain Signal Processing to Broadband Single-Carrier Transmissions in a Wireless Channel

Adachi

Tomeba

Takeda

2009

IEICE Trans. Commun.

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SUMMARYRecently, frequency-domain equalization (FDE) has been attracting much attention as a way to improve single-carrier (SC) signal transmission in a frequency-selective wireless channel. Since the SC signal spectrum is spread over the entire signal bandwidth, FDE can take advantage of channel frequency-selectivity and achieve the frequency diversity gain. SC with FDE is a promising wireless signal transmission technique. In this article, we review the pioneering research done on SC with FDE. The principles of simple one-tap FDE, channel estimation, and residual intersymbol interference (ISI) cancellation are presented. Multi-input/multioutput (MIMO) is an important technique to improve the transmission performance. Some of the studies on MIMO/SC with FDE are introduced.

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“…On the other hand, OFDM is considered a solution for the selectivity of the channel. This gives the ability for transmitting high data rate in fading environment [1,2]. MC-CDMA poses high peak-to-average power ratio (PAPR) problem, as a consequence of independently modulated carriers.…”

Section: Introductionmentioning

confidence: 99%

A Novel Method to Reduce Peak-To-AveragePower Ratio (PAPR) In Multicarrier Code Division Multiple Access (MC-CDMA)

El-Absi¹,

Hussein²

2011

IJCEE

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Abstract-This paper proposes an efficient peak-to-average power ratio (PAPR) reduction method for multicarrier code division multiple access (MC-CDMA) signals by decreasing the possibility of peaks of the subcarriers signals to occur at the same time. The achieved results confirm that the proposed method is capable of reducing the PAPR significantly and, therefore, of improving error performance of the system. Index Terms-CDMA, MC-CDMA, OFDM, PAPR.

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Overview of multicarrier CDMA

Cited by 1,762 publications

References 8 publications

Narrowband Interference Suppression in Wireless OFDM Systems

Narrowband Interference Suppression in Wireless OFDM Systems

Introduction of Frequency-Domain Signal Processing to Broadband Single-Carrier Transmissions in a Wireless Channel

A Novel Method to Reduce Peak-To-AveragePower Ratio (PAPR) In Multicarrier Code Division Multiple Access (MC-CDMA)

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