Aditya Trivedi

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Ad hoc networks are vulnerable due to their structure less property. A Mobile Ad-Hoc Network (MANET) is an infrastructure less collection of mobile nodes that can arbitrarily change their geographic locations such that these networks have dynamic topologies and random mobility with constrained resources. They also have capability of network partition. The(More)
In this paper, performance of space-time trellis-code (STTC), space-time block code (STBC), and space-time trellis-code concatenated with space-time block code (STTC-STBC) for multi-carrier code-division multiple-access (MC-CDMA) system are studied. These schemes are considered by employing different detection techniques with various multi input multi(More)
This paper considers applying the well known least-mean-square (LMS) adaptive algorithm on the detection for space-time coded multicarrier CDMA (STC-MC-CDMA) systems in frequency selective environments. In particular, we consider the Alamouti's space-time coding scheme that involves two transmit antennas. The performance of the LMS detector is evaluated(More)
Spectral efficiency (SE) and energy efficiency (EE) are the critical challenges for the next generation cellular network (NGCN). Small cells deployment and cognitive radio which facilitates efficient utilization of radio spectrum are the promising techniques for evolution of the NGCN. In a heterogeneous cellular network (HCN) design where interference is an(More)
This paper investigates cognitive radio network (CRN) performance through cooperative multiple cognitive radio relays and relay selection with channel allocation scheme. In one approach the overall end-to-end throughput (OEET) improves as the number of cognitive radio relays (CRRs) increases in CRN. In this approach, the OEET increases with the number of(More)
The ease of use and re-configuration in a wireless network has played a key role in their widespread growth. The node deployment problem deals with an optimal placement strategy of the wireless nodes. This paper models a wireless sensor network, consisting of a number of nodes, and a unique sink to which all the information is transmitted using the shortest(More)
Cognitive radio technology is a promising approach to enhance the spectrum utilization. As the cognitive radio network (CRN) is prone to random attackers, security becomes an important issue for the successful deployment of CRN. In CRN, the dynamic spectrum characteristics of the channel changes very rapidly and further inclusion of the random jammer makes(More)
In the cognitive radio networks (CRNs), primary user (PU) has higher priority to access the spectrum band over the secondary user (SU). In this paper, new multichannel priority based cognitive radio (CR) architecture is presented for medium access control (MAC). This multichannel CRN architecture is designed with pre-emptive, non-preemptive resume, and(More)
Wireless Mesh Networks (WMNs) have emerged as a cost effective and promising technology to provide broadband connectivity in several environments. In this work, we consider a cross layer optimal design of routing, medium access control (MAC) scheduling, and physical layer resource allocation for WMNs, where nodes are equipped with Multiple Input Multiple(More)