Ravi Kumar

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Multiple Input Multiple Output(MIMO) has been remained in much importance in recent past because of high capacity gain over a single antenna system. In this article, analysis over the capacity of the MIMO channel systems with spatial channel has been considered when the channel state information(CSI) is considered imperfect or partial. The dynamic CSI model(More)
Multiple Input Multiple Output (MIMO) has been remained in much importance in recent past because of high capacity gain over a single antenna system. In this article, analysis over the capacity of the MIMO channel systems with spatial channel has been considered when the channel state information (CSI) is considered imperfect or partial. The dynamic CSI(More)
Semiblind channel estimation method provides the best trade-off in terms of bandwidth overhead, computational complexity and latency. The result after using multiple input multiple output (MIMO) systems shows higher data rate and longer transmit range without any requirement for additional bandwidth or transmit power. This paper presents the detailed(More)
Multiple Input Multiple Output (MIMO) antenna systems are being given much attention to provide high capacity with less bandwidth requirement. In this paper, some channel estimation techniques have been tried to implement with the adaptive semiblind channel estimation scheme using less requirement of pilot symbols similar to as in the case of the estimating(More)
The Orthogonal Frequency Division Multiplexing (OFDM) is a multicarrier modulation technique becomes very popular because of its advance used in VLSI. Today it is used in many wireless standards such as WLAN, DAB and ETSI Hiperlan/2.In wireless communication system multi path propagation impairments can be reduce the error rate performance of the system. In(More)
—This paper presents a new way to realize the dynamic model of MIMO channel in presence of m-Nakagami fading. The dynamic model is compared with the static model of MIMO channel and the performance analysis of SISO, SIMO, MISO and MIMO systems is evaluated in presence of m-Nakagami distribution. All the results are plotted between signal to noise ratio(More)
Image and video (multimedia) databases are very large in size. It becomes very difficult to search the images from these databases by the application of conventional exhaustive searching because it will require unreasonable amount of time. For this purpose an automatic graph based clustering algorithm is developed and proposed through this paper. It reduces(More)
Image and video (multimedia) databases are very big in size so it is very difficult to search the images from these databases by the application of conventional exhaustive searching as it will require unreasonable amount of time. For this purpose an automatic graph based clustering algorithm is proposed and developed to reduce the searching time for the(More)
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