Performance comparison of the multi-code fixed spreading length (MFSL) scheme and the variable spreading length (VSL) scheme for multi-rate MC-CDMA

Tan, Mizhou; Bar-Ness, Y.

doi:10.1109/isssta.2002.1049296

Cited by 14 publications

(7 citation statements)

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“…For simplicity, assume that R g is a multiple of R G with scalar factor L g =R g /R G . The variable spreading factor (VSF) access scheme [2] [7] is considered, where all users share a common bandwidth and have the same number of subcarriers, and the numbers of subcarriers to transmit one data symbol for different user groups are different. Also, the spreading factor (SF) for the transmitted symbols of the users in the gth group is defined as SF g =SF G /L g , where SF G =N is the spreading factor for the last group which has the lowest data rate.…”

Section: Data Modelmentioning

confidence: 99%

“…The MC-CDMA, which possesses the merits of spectral efficiency of the CDMA systems and of robustness against intersymbol interference (ISI) of orthogonal frequency division multiplexing (OFDM) systems [1]- [2], has been a promise for future wireless communication systems. Also, studies have shown that deploying multiple antennas in wireless systems can effectively enhance the quality of service (QoS) with the help of spatial diversity and array gain [3].…”

Section: Introductionmentioning

confidence: 99%

“…Also, studies have shown that deploying multiple antennas in wireless systems can effectively enhance the quality of service (QoS) with the help of spatial diversity and array gain [3]. In light of the growing demand for multimedia wireless services such as video, image, and audio, the multirate MC-CDMA systems with multiple receive antennas, which can cope with data with different traffic rates, have received much interest recently [2]- [6].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Iterative Multiuser Detection with Soft Interference Cancellation for Multirate MC-CDMA Systems

Fang

Lu³

et al. 2008

VTC Spring 2008 - IEEE Vehicular Technology Conference

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This paper presents an effective multi-rate multiuser detector (MUD) for the uplink of single-input multipleoutput (SIMO) multi-carrier code division multiple access (MC-CDMA) systems. The MUD considered is an iterative receiver which utilizes the soft information to refine the estimation of the interference to enhance the interference cancellation capability. More specifically, users with different transmission rates are classified into separate groups and, in each iteration, these groups of users are detected sequentially based on a set of minimum mean-squared error (MMSE) group detectors with the removal of multiple access interferences (MAI) group by group. Furthermore, the estimated interferences in each group, either from the same or the other groups, are refined successively with the assistance of the soft information in the symbol detection process. Conducted simulations show that the proposed MUD, with moderate computational overhead, can effectively suppress the MAI to render superior performance compared with previous works.

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Section: Data Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Iterative Multiuser Detection with Soft Interference Cancellation for Multirate MC-CDMA Systems

Fang

Lu³

et al. 2008

VTC Spring 2008 - IEEE Vehicular Technology Conference

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“…Many researches provide new ways to cope up with the difficulties faced in the 5G scenario and provide the interference cancellation for the 5G millimeter waves 2–9 . The authors also provide a new way of utilizing different ideas 10–17 .…”

Section: Introductionmentioning

confidence: 99%

Single carrier variable rate scheme and modified carrier allocation over a wireless channel with carrier frequency offset

Khan¹,

Kumar

2022

Int J Communication

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Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM) is the backbone for the 5G, Internet of Things (IoT), and future generation wireless networks. However, OFDM is less localized in the frequency domain, and that's why more sensitive to carrier frequency offset (CFO). In this paper, different multicarrier variable rate schemes are evaluated in the presence of CFO. Additionally, variable rate schemes based on group orthogonal-orthogonal frequency division multiple access (GO-OFDMA) are discussed, and the effect of changing carrier allocation is examined. Different allocation schemes along with different variable rate schemes are verified in the presence of the CFO.Further for Up-link variable rate application, single-carrier scenario for the variable rate is proposed in this paper, and bit error rate (BER) performance is evaluated and compared with the variable rate GO-OFDMA.

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“…While synchronization algorithm and coded systems are evaluated in [25]. As multiple services with different bit rate in a system are currently receiving more attention, new multi-rate CDMA systems based on variable number of spreading codes or multiple multi-code sets have been suggested in [26][27] [28]. Especially, [27] analyzed the performance of Multi-Carrier DS/CDMA system with two multi rate schemes: Multi-Code (MC) scheme and Multiple Processing Gain (MPG) scheme and compared two schemes in Rayleigh fading channel.…”

Section: Introductionmentioning

confidence: 99%

BER Analysis of Multi-Code Multi-Carrier CDMA Systems in Multipath Fading Channel

Ali¹,

Islam²,

Hossain³

et al. 2011

IJCNC

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Performance comparison of the multi-code fixed spreading length (MFSL) scheme and the variable spreading length (VSL) scheme for multi-rate MC-CDMA

Cited by 14 publications

References 0 publications

Iterative Multiuser Detection with Soft Interference Cancellation for Multirate MC-CDMA Systems

Iterative Multiuser Detection with Soft Interference Cancellation for Multirate MC-CDMA Systems

Single carrier variable rate scheme and modified carrier allocation over a wireless channel with carrier frequency offset

BER Analysis of Multi-Code Multi-Carrier CDMA Systems in Multipath Fading Channel

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