Ultra wideband (UWB) communication is mainly used for short range of communication in wireless personal area networks. Orthogonal Frequency Division Multiplexing (OFDM) is being used as a key physical layer technology for Fourth Generation (4G) wireless communication. OFDM based communication gives high spectral efficiency and mitigates Inter-symbol Interference (ISI) in a wireless medium. In t...

In this paper, we present WWTP(Wireless Waiting-Time Priority) to provide relative delay differentiation in a wireless network where packets are classified into one of the ordered classes according to their relative delay requirements. WWTP ensures that a packet of higher class to enjoy better QoS(Quality of Service) than that of lower class unless it suffers from wireless channel errors. Packe...

Radio channel characteristics of mobile nodes are quite different compared with the traditional stationary base station to mobile radio channel. Wireless link reliability estimation is necessary for self-organization of wireless mobile multihop networks. In this paper, we measure narrowband path loss measurements in a typical mobile-to-mobile radio environment. For application, we proposed a me...

In the presented paper, the principle of frequency domain channel estimation for wireless OFDM systems will be shown. A well known noise reduction technique will be adapted to HIPERLAN/2 and IEEE802.11a standards, and its positive effects will be demonstrated by simulation results. Channel tracking has not been considered by the WLAN standards named above, although it is well known that time-va...

Wireless mobile ad hoc networks (MANETS) are self configuring, dynamic networks in which nodes are free to move. In mobile ad hoc networks, the major performance constraint comes from path loss and channel fading. This project implements a channel adaptive routing protocol which extends the Ad hoc On-Demand multipath Distance vector (AOMDV) Routing protocol to accommodate channel fading. This c...

Eliminating the need for extensive wiring between sensors, actuators and a controller could reduce the cost and enhance the attractiveness of control systems for civil structures. In this study, wireless sensors are proposed for a structural control system with the wireless sensors responsible for the collection of state response data, calculation of control forces, and the issuing of command s...

Wireless mesh networks o er many advantages in terms of connectivity and reliability. They provide multiple paths between nodes and are self healing. Traditionally, wireless mesh networks were used with nodes equipped with a single radio. There are however, limitations in single radio wireless mesh networks, such as lower throughput and its limited use of the available wireless channels. This r...

In multi-channel wireless networks, multi-channel diversity can increase the number of concurrent transmissions and thus improve the throughput performance as data transmission on a wireless channel does not interfere with transmissions on the other non-overlapping channels. However, multi-channel coordination may cause severe performance degradation due to hidden terminals, missing receivers, ...

We discuss the performance of polar codes, the capacity-achieving channel codes, on wireless communication channel in this paper. By generalizing the definition of Bhattacharyya Parameter in discrete memoryless channel, we present the special expression of the parameter for Gaussian and Rayleigh fading the two continuous channels, including the recursive formulas and the initial values. We anal...

We consider a game-theoretic power control algorithm for wireless data realistic channels. We study the performance of the algorithm for wireless data in the fast, flat-fading channel mobile users encounter in accessing the cellular system. The game-theoretic power control algorithm depends on an average utility function that assigns a numerical value to the quality of service (QoS) of users. T...