K. Vinoth Babu

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High-data-rate transmission can be achieved by Spatially Multiplexed (SM) MIMO systems. Spatial demultiplexing at the receiver end is a difficult task. Thus, several research works has been developed for demultiplexing and decoding. In this paper three signal detection methods namely Zero-Forcing (ZF), Minimum Mean Squared Error (MMSE) and Maximum(More)
In this paper, a new adaptive HAST scheme is proposed for Space Frequency Block Coded (SFBC)-Orthogonal Frequency Division Multiplexing (OFDM) system. This HAST scheme uses subcarrier by subcarrier antenna selection. The performance of the proposed scheme is analyzed for different antenna configurations with average Signal to Noise Ratio (SNR) gain and Bit(More)
Multiple antennas at the transmitter side and/or at the receiver side can improve the capacity and/or quality of reception in a fading environment. In this paper, a comparative study of various diversity schemes with and without feedback is presented. Simulation results show that maximal ratio combining (MRC) and transmit beamforming provide maximum(More)
Present wireless technologies demand high quality broadband services even at cell edges. Multi-hop relay (MHR) network is one of the suitable solutions for the above demands. The standards like IEEE 802.16j and Long Term Evolution (LTE) are using relay architecture which mainly focuses on capacity and coverage improvement. In recent days, multi antenna MHR(More)
OFDM is a Multicarrier modulation (MCM) technique, which in used in 4G standards. In OFDM systems, symbols are transmitted in parallel on several narrowband subcarriers, which are overlapping and orthogonal to each other. OFDM is superior to other systems because it incurs zero Inter Symbol Interference (ISI) or less amount of ISI which can be compensated(More)
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