Performance of multi-user transmitter preprocessing assisted MIMO system over correlated frequency-selective channels

Nagaradjane, Prabagarane; Rajan, Yuvika Ashwina; Muralidharan, Prasaanth; Sarathy, Sabarish Karthik Vivek

doi:10.1016/j.phycom.2012.06.001

Cited by 20 publications

(5 citation statements)

References 27 publications

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“…The aims this study are designing a wireless communication system with least Bit Error Rate (BER) for high data rate to fix stationary nodes and mobile users under multichannel models. These ideas will be implemented in MC-DS-CDMA system by adding STBC with more than two antennas and using DFT or DWT (Linfoot et al, 2007;Bagadi et al, 2016;Nagaradjane et al, 2013). The proposed STBC-MC-DS-CDMA transceiver is shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

“…When the Alamouti coding is applied, the system is equivalent to independent single-input single-output systems defined as (Simsir and Taspinar, 2017;Nagaradjane et al, 2013):…”

Section: Spreading Codes (Gold Codes)mentioning

confidence: 99%

“…It has the ability to compact the signal energy into few large coefficients. The original signal can be reconstructed perfectly from these few coefficients while suppressing the other coefficients without losing most of the features of the signal (Shi and Yang, 2014;Nagaradjane et al, 2013;Zakaria and Ruyet, 2014). There are many previous works duels with the design and evaluation of potential gains of LTE or OFDM system.…”

Section: Introductionmentioning

confidence: 99%

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MC-DS-CDMA System Based on DWT and STBC in Multipath Fading ITU Channels Model

Khadam¹,

Abdul-Rahaim²,

Ahmadi³

et al. 2020

J. Eng. Appl. Sci.

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In this study, the performance of MultiCarrier Direct Sequence Code Division Multiple Access (MC-DS-CDMA) in fixed MC-DS-CDMA and mobile MC-DS-CDMA applications have been improved by using the compensations of space time block coding and Discrete Fast Fourier Transform (FFT) or Discrete Wavelets Transform DWT. These MC-DS-CDMA systems had been simulated using MATLAB 2015a. Through simulation of the proposed system, various parameters can be changed and tested. The Bit Error Rate (BERs) of these systems are obtained over wide range of signal to noise ratio. All simulation results had been compared with each other using different subcarrier size of FFT or DWT with STBC for 1, 2, 3 and 4 antennas in transmitter and under different ITU multipath fading channels and different Doppler frequencies (fd). The proposed structures of STBC-MC-DS-CDMA system based on DWT batter than based on (FFT) in varies Doppler frequencies and subcarrier size. Also, proposed system with STBC based on 4 transmitters better than other systems based on 1 or 2 or 3 transmitters in all Doppler frequencies and subcarrier size in all simulation results. Finally, digital hardware designed for transmitter and receiver of STBC-MC-DS-CDMA algorithm to prove the efficiency of the system techniques using FPGA type to check and optimized the chip area of implementation of proposed system.

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Section: Methodsmentioning

confidence: 99%

“…When the Alamouti coding is applied, the system is equivalent to independent single-input single-output systems defined as (Simsir and Taspinar, 2017;Nagaradjane et al, 2013):…”

Section: Spreading Codes (Gold Codes)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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MC-DS-CDMA System Based on DWT and STBC in Multipath Fading ITU Channels Model

Khadam¹,

Abdul-Rahaim²,

Ahmadi³

et al. 2020

J. Eng. Appl. Sci.

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“…In the ideal condition, the channel capacity increases linearly with the number of transmit antennas. In the actual system, the MIMO system is difficult to reach its theoretical value due to the limitation of the correlation between the antenna and the surrounding environment [11]. And in the cellular communication environment, the MIMO is expected to increase the system throughput in the same time and frequency resources.…”

Section: Introductionmentioning

confidence: 99%

Application of Large Scale MIMO Technology in the Heterogeneous Networks

Ren¹

2016

IJFGCN

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“…In [10] Shriram Swaminathan and his team have explored the benefits of MC-IDMA system in terms of achievable BER when Zero-forcing multi-user transmitter preprocessing (ZF-MUTP) technique is used for DL communications. The author Prabagarane Nagaradjane and his team in [11] further addressed the performance of SVD based MUTP assisted DSTTD-SDMA system in frequency selective channels and demonstrated that it achieves better BER performance compared to other popular Pre-processing technique such as block diagonalization (BD) , dirty paper coding (DPC) , Tomlinson-Harashima precoding (THP) and Geometric mean decomposition (GMD).In [12], the authors have used a linear MMSE-based synchronization algorithm and manifested that it could be used to mitigate the Inter channel interference caused by carrier frequency offset errors in the OFDM-IDMA System. The author Katsutoshi Kusume has elaborately portrayed the comparison between IDMA and DS-CDMA schemes considering iterative multi user detection.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of MIMO-IDMA system using spatial diversity in frequency-selective channel

Vishvaksenan¹,

Abidha²

2015

2015 International Conference on Communications and Signal Processing (ICCSP)

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In this letter, we investigate the bit-error rate (BER) performance of uncoded space-time transmit diversity (STTD) aided interleave division multiple access (IDMA) scheme for down-link (DL) communications. In this contribution, we consider the orthogonal structure based on Alamouti Space-Time code which offers full rate and full diversity. We realize such STTD using two transmit antennas and two receive antennas. At the mobile station, we exploit non-linear detection based on Maximum Likelihood detection algorithm to estimate the desired users' signals. We evaluate the BER performance of STTD-IDMA system based on Rayleigh fading channels with multi-path scattering effects. We also compare the performance of our considered system with Vertical Bell laboratories Space-Time (VB LAST) architecture for the same IDMA system. Our simulation reveals that our considered STTD-IDMA system with ML detection algorithm provides better BER performance than VB LAST assisted IDMA system for DL communications. Interference (MAl), Multi Stream Interference (MSI) , Space-time transmit diversity (STTD).

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Performance of multi-user transmitter preprocessing assisted MIMO system over correlated frequency-selective channels

Cited by 20 publications

References 27 publications

MC-DS-CDMA System Based on DWT and STBC in Multipath Fading ITU Channels Model

MC-DS-CDMA System Based on DWT and STBC in Multipath Fading ITU Channels Model

Application of Large Scale MIMO Technology in the Heterogeneous Networks

Performance analysis of MIMO-IDMA system using spatial diversity in frequency-selective channel

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