Efficient MAI Cancellation Scheme in MC-DS-CDMA Using SIC

Gnanasekar, A. K.; Nagarajan, V.

doi:10.1007/s10766-018-0575-9

Cited by 4 publications

(3 citation statements)

References 17 publications

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“…1. The MC-CDMA signal [27] is generated through a serial concatenation of the classical DS-CDMA and OFDM. The MC-CDMA modulator disperses each user's data in the frequency domain.…”

Section: Structure Of the Proposed Mc-cdma Systemmentioning

confidence: 99%

Improving Performance of MC-CDMA Systems Using UTTCM Channel Coding

Bendjillali,

Bendelhoum,

Elarbi

et al. 2024

JTIT

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Over the past decade, personal communications have witnessed exponential growth, fueled by the increasing number of connected users and the diversity of transmitted data types. This expansion necessitates a boost in the transmission systems' capacity to accommodate higher user numbers and data rates, simultaneously striving to optimize cost and complexity. Consequently, future communication systems are pivoting towards multi-carrier spread spectrum techniques (MC-CDMA), capitalizing on the robustness of OFDM multi-carrier transmissions against multipath propagation and leveraging the flexibility of the code division multiple access (CDMA) technique. This study addresses data transmission quality-related concerns within an MC-CDMA system by implementing UTTCM error correction codes. These codes aim to enhance channel spectrum efficiency and mitigate error probability. Simulation results demonstrate that the proposed transmission scheme offers significant improvements in terms of bit error rate and signal-to-noise ratio, while maximizing the bandwidth shared among users. Additionally, the incorporation of such equalization techniques as zero forcing (ZF) and minimum mean square error (MMSE), ensures extensive compensation for the channel selectivity effect.

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“…1. The MC-CDMA signal [27] is generated through a serial concatenation of the classical DS-CDMA and OFDM. The MC-CDMA modulator disperses each user's data in the frequency domain.…”

Section: Structure Of the Proposed Mc-cdma Systemmentioning

confidence: 99%

Improving Performance of MC-CDMA Systems Using UTTCM Channel Coding

Bendjillali,

Bendelhoum,

Elarbi

et al. 2024

JTIT

View full text Add to dashboard Cite

show abstract

“…Additionally, the AR ordered modeling selection should be examined. There are four common methods for estimating the coefficients of this parameter model: Yule-Walker (YW), Burg, least mean squares, and least squares forward (LSF) [15], [16].…”

Section: Introductionmentioning

confidence: 99%

Two cross coupled and Madgwicks filter for estimation of multi-channel dividing systems

Kadhim

Alrubaie

Al‐Kharsan

2022

IJEECS

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The estimates of Rayleigh fading channels are rapidly changing in multi carrier direct sequence code division multiple access (MC-DS-CDMA) multiplexing systems. The most widely accepted answer to this issue is the conventional solution least square (LS) or mean square error estimator (MMSE) using the recursive least squares algorithm (RLS) or the least mean squares (LMS) algorithm. In much of the previous work, only one Kalman filter was used for estimation. In this paper, a Kalman filter is used with a Madgwicks filter together to satisfy the fading problems. However, this requires a priori evaluation of auto regressive (AR) parameters. A standard solution involves the first matching of the auto-completion function of the applying the AR method to Jakes' problem and then tackling it (YWE). Even more the results procedure is limited to crowd constraints and is related to an AR+ process of noise, an approximation considered. In fact, depending on simulation findings, high-AR models outperform conventional models on the basis of spectral estimate and bit error margins (BER). Nevertheless, in order to save costs of computing, the 5-D model of AR is a possibility. The proposed process outperforms edge of art competitors in terms of bit error rate as demonstrated by results.

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“…It can be combined to DS‐CDMA to make frequency fading channel into flat fading channel. The subsequent method can be legally termed as multicarrier code‐division multiple access (MC‐CDMA) system …”

Section: Introductionmentioning

confidence: 99%

Performance estimation of multicarrier CDMA using adaptive brain storm optimization for 5G communication system in frequency selective fading channel

Kumar

Venkatesan

2019

Trans Emerging Tel Tech

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Multicarrier code-division multiple access (MC-CDMA) is an efficient method for high-speed data transmission. MC-CDMA systems are mostly affected with high peak-to-average power ratio (PAPR) and this may reduce the spectral efficiency of the system. This paper presented the PAPR reduction of a MC-CDMA using partial transmit sequence (PTS) method via whale optimization algorithm (WOA) and modified brain storm optimization (MBSO). For quadrature phase-shift keying (QPSK) modulation, our proposed method uses pseudorandom sequence (PRS) at dissimilar amount of active users. MBSO algorithm optimizes time delay and carrier frequency offset (CFO), and thus, we can minimizes the intercarrier interference from the carrier signal. Thus, we can achieve high-speed data transmission in MC-CDMA with PTS system. The results show that 64-bit QPSK has superior performances in case of bit error rate, PAPR, spectral efficiency, maximum likelihood sequence estimation, normalized mean square error, minimum mean square error, CFO, and mean square error. Hence, the performance variations for the abovementioned parameters are 60%, 23%, 12%, 15%, 40%, 5%, 14%, and 3%, respectively. These all the outcomes are taken for dissimilar modulation and the different channels.Trans Emerging Tel Tech. 2020;31:e3829.wileyonlinelibrary.com/journal/ett An adaptive combining method and a joint pre-equalization process was mentioned by Sun et al. 17 In the transmitter side, by using the controlling parameter, a method of pre-equalization is applied to compensate the selectivity of channel and improve the diversity gain. To regulate the optimum combining coefficients, a recursive least square (RLS) adaptive combining procedure is used in the receiver. The goal of RLS is to reduce the detection errors under different channel conditions. Simulation outcomes verified the better performance of the suggested method in regards of BER. The performance of modified evolutionary multiuser director (MUD) was introduced by Hung et al 18 in MC-CDMA communication systems over frequency selective fading channels (F-SFCs). In optimum detection, the genetic algorithm

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Efficient MAI Cancellation Scheme in MC-DS-CDMA Using SIC

Cited by 4 publications

References 17 publications

Improving Performance of MC-CDMA Systems Using UTTCM Channel Coding

Improving Performance of MC-CDMA Systems Using UTTCM Channel Coding

Two cross coupled and Madgwicks filter for estimation of multi-channel dividing systems

Performance estimation of multicarrier CDMA using adaptive brain storm optimization for 5G communication system in frequency selective fading channel

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