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Hendre V.S.,College of Engineering, Pune | Hendre V.S.,Sathyabama University | Murugan M.,SRMs Valliammai Engineering College
International Conference on Communication and Signal Processing, ICCSP 2013 - Proceedings | Year: 2013

Space Time Block Codes (STBC) have shown remarkable performance for Multiple Inputs Multiple Output (MIMO) systems. The performance of STBC can be further enhance by knowing transmit channel side information. This paper investigates how to exploit the channel side information at the transmitter end for STBC-MIMO system using pre-coding methods. The mathematical model for designing the codebook for Precoded Orthogonal STBC (OSTBC) is developed to minimize the pair error probability. Precoded OSTBC is further applied to IEEE 802.16e specifications of Mobile WiMAX system. The bit error rate (BER) performance is also verified for pre-coded spatial multiplexed MIMO system using pre-equalization method for minimum mean square estimation (MMSE) at transmitter end. Pre-equalization at transmitter end outperforms over the receiver side equalization. © 2013 IEEE. Source


Hendre V.S.,College of Engineering, Pune | Hendre V.S.,Sathyabama University | Murugan M.,SRMs Valliammai Engineering College | Jawale R.V.,College of Engineering, Pune
2015 International Conference on Pervasive Computing: Advance Communication Technology and Application for Society, ICPC 2015 | Year: 2015

The performance of Multiple Input Multiple Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) systems is seriously affected by various imperfections at receiver such as In-phase/Quadrature-phase (I/Q) imbalance, Carrier Frequency Offset (CFO) and DC offset. The proper estimation of theses imperfections at the receiver lead to increase the Bit Error Rate (BER) performance of the system. The training sequence based estimation is proposed in this paper for combine correction of I/Q imbalance and CFO estimation. Channel Residual Energy (CRE) is used for estimation. The performance of the proposed system is based on Crammer-Rao bound. Simulation results shows that our proposed method gives improved results over IQ-CFO-FD method for joint estimation of (I/Q) imbalance, (CFO) and channel response. Also we show that as number of transmit antennas increases at transmitter side then mean square error is reduced, this leads the further reduction in these imperfections in MIMO-OFDM systems © 2015 IEEE. Source


Hendre V.S.,College of Engineering, Pune | Hendre V.S.,Sathyabama University | Murugan M.,SRMs Valliammai Engineering College | Kamthe S.S.,College of Engineering, Pune
Proceedings - 2014 IEEE Global Conference on Wireless Computing and Networking, GCWCN 2014 | Year: 2015

In order to get the benefit of multiple antenna systems with less hardware complexity and increased data rate, Transmit Antenna Selection (TAS) is popular in Multiple Input Multiple Output (MIMO) Systems. The performance TAS systems can be further enhanced with Orthogonal Space Time Block Codes. In this paper, we present Transmit Antenna Selection (TAS) technique based on Maximal Ratio Combining (MRC) scheme with single antenna selection for image transmission. The performance analysis of the system is carried out under Rician fading channels for image input. We have proposed a TAS/MRC system in Simulink with advancement in channel design and receive diversity techniques along with feedback models. The Bit Error Rate (BER) analysis is performed for the combinations of number of transmit and receive antennas for TAS/MRC system for Rician fading environments. © 2014 IEEE. Source


Hendre V.S.,University of Pune | Hendre V.S.,Sathyabama University | Murugan M.,SRMs Valliammai Engineering College | Kamthe S.,University of Pune
International Journal of Electrical and Computer Engineering | Year: 2015

Multiple antenna configurations can be used to increase the data throughput reducing the effects of multipath fading and interference when channel bandwidth is limited. Orthogonal Space Time Block Codes along with Transmit antenna selection can improve the performance of multiple input multiple output systems. In this paper, we present the Transmit Antenna Selection (TAS) technique based on the Maximal Ratio Combining (MRC) scheme with single antenna selection for image transmission. The performance analysis of the system was carried out under different fading channels i.e. Rayleigh and Rician channel for image input. We design end to end TAS/MRC system in Simulink with advancements in the channel designs and receive diversity techniques along with the feedback models. The Bit Error Rate (BER) analysis was performed for the combinations of number of transmit and receive antennas for TAS/MRC system for various fading environments. Copyright © 2015 Institute of Advanced Engineering and Science. All rights reserved. Source


Hendre V.,College of Engineering, Pune | Hendre V.,Sathyabama University | Murugan M.,SRMs Valliammai Engineering College | Chandgude A.B.,College of Engineering, Pune
Procedia Computer Science | Year: 2015

Transmit Antenna Selection (TAS) is essential part of future wireless systems to reduce the complexity of multiple antenna techniques and to satisfy the need of higher data rates. In this paper, we present TAS technique based on Maximal Ratio Combining (MRC) scheme with multiple antenna selection. The sub optimal antenna selection is carried out for selecting more than one subset of antenna which minimizes the upper bound of pair wise error probability. The performance analysis of the system is carried out under Nakagami-m flat fading channel. The Bit Error Rate (BER) analysis is performed for multiple antenna selection in MIMO-OSTBC system for arbitrary values of 'm' in Nakagami-m fading channel. © 2015 The Authors. Source

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