C. Arunachalaperumal

  • Citations Per Year
Learn More
The Quality of Service (QoS) and spectral efficiency in land mobile satellite (LMS) communications drops drastically in the presence of shadowing and multipath fading. The method for increasing QoS and spectral efficiency, is done by without any increasing in total transmit power, antenna gain or bandwidth by using multiple-input multiple-output (MIMO)(More)
ABSTRACT– Spatial Modulation (SM) provides many advantages when compared to other conventional Multiple Input Multiple Output (MIMO) schemes in which multiple antenna transmit simultaneously. In SM only one antenna will be active during data transmission. This completely eliminates Inter Channel Interference (ICI) and reduces decoding complexity. In other(More)
— The demand for mobile communication systems with high knowledge rates has dramatically raised in recent years. New ways are necessary so as to satisfy this immense communications demand, exploiting the restricted resources like information measure and power as economical as potential. MIMO systems with multiple Antenna parts at each link ends are an(More)
Spatial modulation is a transmission technique that uses multiple antennas. It involves mapping of a block of information bits to two information carrying units, as a symbol chosen from constellation diagram and a unique transmit antenna number. The importance of Spatial modulation is that it increases overall spectral efficiency. In this paper we show the(More)
This paper studies about the research on ways to extend and improve query methods for image databases is widespread, we have developed the QBIC (Query by Image Content) system to explore content-based retrieval methods. To achieve the high efficiency and effectiveness of CBIR we are using two type of methods for feature extraction like SVM(support vector(More)
Spatial Modulation (SM) provides many advantages when compared to other conventional Multiple Input Multiple Output (MIMO) schemes in which multiple antenna transmit simultaneously. In SM only one antenna will be active during data transmission. This completely eliminates Inter Channel Interference (ICI) and reduces decoding complexity. In other coding(More)
Abstract— In recent years parasitic antenna play major role in MIMO systems because of their gain and spectral efficiency. In this paper, single RF chain MIMO transmitter is designed using reconfigurable parasitic antenna. The Spatial Modulation (SM) is a recently proposed scheme in MIMO scenario which activates only one antenna at a time. The SM entirely(More)
During the past decade, MIMO techniques have experienced a great interest in wireless communication systems. Also Cognitive Radio has been recognized as an advanced mean to effectively enhance the spectrum utilization. This paper investigates the comparison between precoding and prewhitening schemes for MIMO cognitive radio system where the primary and(More)
Adaptive Spatial Modulation (ASM) is a transmission scheme proposed to achieve better system performance. Here, the modulation orders are assigned to the transmit antennas which are dynamically adapted to the changing channel conditions. As the channel slowly varies, the adaptive unit at the receiver computes the optimum candidate and send that information(More)
Cognitive radio assents the secondary users to access the spectrum of the primary user only when there is a spectrum hole is detected. Hence the looked-for spectral competence cannot be achieved. To improve the spectral efficiency the synchronicity of the primary and secondary users are required and it is achieved by beamforming. Two main problems are(More)