Browsing 2006 Auswireless Conference by Title

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Browsing 2006 Auswireless Conference by Title

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  • Security in Ad-Hoc Routing Protocols 
    Deshpande, Vivek S. (2007-03-12)
    Mobile Ad-Hoc Networks (MANETs) are becoming increasingly popular as more and more mobile devices find their way to the public, besides traditional" uses such as military battlefields and disaster situations they are being ...
  • SEQUENCE SYNCHRONIZATION IN A WIDEBAND CDMA SYSTEM 
    Berber, Stevan M.; Jovic, Branislav. (2007-03-12)
    A mathematical model of a synchronization block of a DS-CDMA system is developed and then investigated using a simulation. For this synchronization a pilot sequence has been used that can be a pseudorandom sequence or a ...
  • Service-Oriented Bandwidth Borrowing Scheme for Mobile Multimedia Wireless Networks 
    Chang, Jau-Yang.; Chen, Hsing-Lung. (2007-03-12)
    Multimedia applications (audio phone, video on demand, video conference, file transfer, etc.) will be integrated into future mobile communication systems. Bandwidth is the most critical resource in mobile multimedia wireless ...
  • Simulating and Designing RF Transmitter for Small Satellites 
    Bacha, Mansour.; Djebouri, Djamel.; Kameche, Mohamed. (2007-03-12)
    This paper discusses the simulation and the design of an RF transmitter for small satellites operating in the commercial S- band (2.2 - 2.29 GHz) with a data rate of 8Mbps. In such systems, modelling frequency-dependent ...
  • Simulation of Call Admission Control in Multi-Traffics WCDMA System 
    Patachaianand, Rachod.; Sandrasegaran, Kumbesan. (2007-03-12)
    Wideband Code Division Multiple Access (WCDMA) is the multiple access technique used in the third generation of mobile telecommunication (3G) systems. Capacity of this technique does not have an exact limit. The maximum ...
  • A Software Phase-Locked Loop from Theory to Practice: TMS320C6000 DSP Based Implementation and Analysis 
    Sithamparanathan Kandeepan (2007-03-12)
    The study of phase locked loops (PLL) has been heavily treated in literature and most of the theoretical and the analytical results of such are verified using simulations. Here we provide a real-time implementation of a ...
  • Statistical Analysis of Interference in Asynchronous MC-CDMA Systems 
    Li, Xuan.; Senadji, Bouchra. (2007-03-12)
    Two major sources of interference affect asynchronous MC-CDMA systems, i.e. multiple access interference due to subcarriers with the same frequency (MAI) and multiple access interference due to subcarriers with different ...
  • STC-MIMO Block Spread OFDM in Frequency Selective Rayleigh Fading Channels 
    Chicharo, Joe.; Dutkiewicz, Eryk.; Tran, Le Chung.; Huang, Xiaojing. (2007-03-12)
    In this paper, we expand the idea of spreading the transmitted symbols in OFDM systems by unitary spreading matrices based on the rotated Hadamard or rotated Discrete Fourier Transform (DFT) matrices proposed in the ...
  • A Study of Channel Estimation in Multi-Band OFDM UWB Systems 
    Zhu, Yaolin.; Li, Changyi.; Zheng, Guoxin. (2007-03-12)
    In this paper, the channel estimation techniques for multiband (MB) OFDM ultra-wideband (UWB) wireless communications are investigated. By combining orthogonal frequency-division multiplexing (OFDM) with multi-band, the ...
  • STUDY OF SPREAD CODES WITH BLOCK SPREAD OFDM 
    Lowe, Darryn.; Raad, Ibrahim S.; Huang, Xiaojing. (2007-03-12)
    This paper presents the study undertaken with block spread OFDM and compares three spreading matrices. The matrices include the Hadamard, Rotated Hadamard and Mutually Orthogonal Complementary Sets of Sequences (MOCSS). ...
  • Sub-band Beamforming of OFDM Signals in Time Varying Multi-Path fading Channel 
    Chimeh, Jahangir Dadkhah; Bakhshi, Hamid Reza; Menhaj, Mohammad Bagher (2007-03-12)
    In this paper, a semi-blind beamforming algorithm is proposed for Orthogonal Frequency Division Multiplexing (OFDM) signals to combat multipath fading which is based on semi-blind beamforming of each sub-band in a OFDM ...
  • Subcarrier Allocation with Minimum Data Rate Constraint in OFDMA Wireless Channels 
    Yang, Feng.; Fang, Gengfa.; Shi, Jinglin.; Dutkiewicz, Eryk. (2007-03-12)
    In this paper, we present a novel and efficient Subcarrire Allocation algorithm with Minimum Data RAte (SAMDRA) constraint for multiuers orthogonal frequency division multiple access (OFDMA) wireless networks. The proposed ...
  • TCP Performance Enhancement over UMTS Network with RNC Feedback 
    Pawlikowski, Krzysztof.; Sirisena, Harsha R.; Jayananthan, A. (2007-03-12)
    TCP optimization for wireless networks to deal with packet losses due to fading, shadowing and contention should preferably maintain TCP end-to-end semantics with minimal dependence on intermediate nodes. The development ...
  • Ultra-Wideband Two-Cluster Tracking System Design with Angle of Arrival Algorithm 
    Ni, David.; Arndt, Dickey.; Ni, Jianjun.; Gross, Julia.; Ngo, Phong.; Phan, Chau. (2007-03-12)
    This paper describes a design effort for a prototype ultra-wideband (UWB) tracking system that is currently under development at NASA Johnson Space Center (JSC). The system is being studied for use in tracking of lunar/Mars ...
  • ULTRA-WIDEBAND (UWB) FOR MULTIMEDIA APPLICATIONS 
    Ali, Borhanuddin Mohd.; Fun, Chan Sook.; Abdullah, Mohd. Khazani.; Khatun, Sabira.; Saeed, Rashid A. (2007-03-12)
    UWB communication refers to impulse radio technology, in which wireless data is transferred using time domain modulation of data and extremely narrow radio impulses (i.e. nanosecond duration) that occupy typically several ...
  • Untitled 
    Unknown author (UTSePress, 2007-03-12)
  • Untitled 
    Unknown author (2007-03-12)
  • Vertical Handoff Decision Algorithms Using Fuzzy Logic 
    Nkansah-Gyekye, Yaw.; Agbinya, Johnson I. (2007-03-12)
    This paper reports on the design and implementation of multi-criteria vertical handoff decision algorithms in a heterogeneous wireless wide area network (WWAN) and a wireless local area network (WLAN) environment. An ...
  • The Voice Capacity of WiFi for Best Effort and Prioritized Traffic 
    Dao, Nghia T; Wei, Xun; Malaney, Robert A. (2007-03-12)
    Crucial to supporting voice over 802.11b is the knowledge of voice capacity (Nc) of a single Access Point. This paper provides an analytical formulation of Nc in the case where all traffic in the network is voice. Our ...
  • WON (Wireless Overlay Network) for Traceback of Distributed Denial of Service 
    Sun, Yan; Kumar, Anup; Srinivasam, S. (2007-03-12)
    This article presents an incremental and scalable solution for tracing Denial of Service (DoS) and Distributed DoS (DDoS) attacks. Our approach allows the victim to identify the network paths traversed by attack traffic ...