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Browsing 2006 Auswireless Conference by Issue Date

Browsing 2006 Auswireless Conference by Issue Date

Now showing items 1-20 of 116

Efficient FFT-based Circulant Embedding Method and Subspace Algorithms for Wideband Single-carrier Equalization

Guan, Raymond.; Strohmer, Thomas. (2007-03-12)

In single-carrier transmission systems, wider bandwidth allows higher data rate by transmitting narrower pulses. For wireless applications, however, this means that the effective channel response is longer and the number ...
On the influence of antenna integration on the radio link of UWB systems for consumer equipment

Manteuffel, Dirk (2007-03-12)

The design of UWB systems for consumer electronic application requires the integration of the antenna for aesthetical design reason. This paper discusses the influence of the integration on the performance of UWB antennas ...
Multi-Gigabit Wireless Link Development

Sevimli, Oya; Dyadyuk, Val; Abbott, David; Bunton, John; Kendall, Rod; Stokes, Leigh; Shen, Mei; Smith, Stephanie (2007-03-12)

CSIRO ICT Centre is developing millimetre wave point-to-point links suitable for multi-gigabit wireless connectivity. Suitable spectrum for this purpose is allocated at the 60 GHz band and above. This paper reports a new ...
Extensions to the IEEE 802.11 TSF for Efficient and Reliable Network Synchronization in Large Scale MANETs

Kummert, A.; Rauschert, P.; Honarbacht, A. (2007-03-12)

Designing new protocols for Mobile Ad hoc Networks (MANETs) is a great challenge due to their distributed and self organized nature. Though, aspects of approved algorithms for hierarchical topographies may be carried over ...
Research on Self-Calibration of HF Ground Wave Radar Antenna Arrays

Chun, Hong.; Zhi-feng, Zhong.; Rui, Wu.; Bi-yang, Wen. (2007-03-12)

Since the performance of high-resolution direction finding algorithm for HF Ground Wave Radar (GWR) is severely degraded by sensor phase and amplitude errors, the radar system's phase calibration is the prerequisite of ...
Characterization of the 60 GHz Wireless Desktop Channel

Evans, R. J.; Liu, C.; Skafidas, E. (2007-03-12)

In this paper we measure and characterize the 55-65 GHz wireless channels for a typical desktop environment. Due to the presence of many obstructions and reflectors on the desktop the 60 GHz desktop channel differs from ...
The Peak Factor of a 16-QAM/OFDM System

Flores-Centurion, Bruno (2007-03-12)

The close relationship between the peak factor of a QPSK/OFDM system and the one from a 16-QAM/OFDM system is presented and analyzed. It is shown that a 16-QAM/OFDM system shows larger peaks and is more difficult to analyze ...
Iterative Decoding of K/N Convolutional Codes based on Recurrent Neural Network with Stopping Criterion

Kao, Johnny W. H; Berber, Stevan M. (2007-03-12)

This paper outlines a novel iterative decoding technique for a rate K/N convolutional code based on recurrent neural network (RNN) with stopping criterion. The algorithm is introduced by describing the theoretical models ...
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 ...
Energy Efficiency Modeling and Analysis in Wireless Sensor Networks

Prasan Kumar Sahoo; Jang-Ping Sheu.; Yu-Chia Chang.; Yun-Ju Chen. (2007-03-12)

We propose here an extended linear feedback model, taking the binary exponential backo® mechanism adopted in IEEE 802.15.4 CSMA/CA and analyse the energy consumption issues of the one hop sensor nodes. Numerical results ...
Experimental Evaluation of Interference from MB-OFDM UWB Systems to Narrowband Wireless Digital Transmission Systems

Kobayashi, Takehiko.; Hasegawa, Kouta.; Tomiki, Atsushi. (2007-03-12)

Multi-band orthogonal frequency-division multipleaccess (MB-OFDM) is one of the UWB technologies that realize wireless personal network (WPAN). In this paper, we experimentally investigated the interference from MBOFDM ...
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 ...
Maximizing the Cutoff Rate in a Quantized MIMO Wireless System with AGC

Murray, Boyd M; Reisenfeld, Sam (2007-03-12)

We investigate the effects of quantization and AGC (Automatic Gain Control) in MIMO (Multiple Input Multiple Output) wireless systems. We derive the cutoff rate equations for a deterministic MIMO channel with quantization ...
Performance of Crosstalk Cancellation in VDSL

Homer, John.; Gujrathi,Mandar.; Cendrillon, Raphael. (2007-03-12)

Crosstalk in DSL leads to significant performance degradation and large losses in data-rate. Several crosstalk cancellation techniques have been proposed to address this problem, however, in the existing literature the ...
Performance Comparison and Analysis of Voice Communication over Ad Hoc Network

Kubik, Kurt.; Einicke, Garry.; Zhang, HuiYao.; Homer, John. (2007-03-12)

Currently, voice traffic (both local and long-distance) is gradually moving from traditional circuit-switched networks to IP-based, packet-switched networks. Another dominant trend is the development of mobile ad hoc ...
An Energy-Aware Protocol for Periodical Data Collection in Wireless Sensor Networks

Urano, Yoshiyori.; Tabassum, Nahdia.; Mamun, Quazi Ehsanul Kabir. (2007-03-12)

In this paper we propose a protocol for periodical data collection applications in wireless sensor networks. The protocol is energy-aware in the sense that the way of energy consumption used here is evenly distributed. The ...
Energy Savings from Implementing Collaborative Beamforming for a Remote Low Power Wireless Sensor Network

Van Schaik, André.; Luskey, Sean.; Jin, Craig. (2007-03-12)

This paper outlines the implementation of collaborative beamforming to a remote low power wireless sensor network and presents its energy saving potential. The directivity procured from the beamforming allows power to be ...
Design of Complex Wavelet Pulses Enabling PSK Modulation for UWB Impulse Radio Communications

Yu, Limin; White, Langford B. (2007-03-12)

In this paper, we present the design of complex Ultra-wideband (UWB) pulses which enables the phase-shift keying (PSK) modulation for UWB Impulse Radio (IR) Communications. Two classes of complex UWB pulses are proposed ...
Performance Analysis of a Chaos-Based Multi-User Communication System Implemented in DSP Technology

Simic, Ljiljana.; Berber, Stevan M. (2007-03-12)

This paper presents the implementation of a multi-user chaos-based communication system in DSP. The system is based on the chaotic phase shift keying (CPSK) digital modulation scheme, where chaotic signals are used as the ...
EXPLOITING TIME DIVERSITY TO IMPROVE BLOCK SPREAD OFDM

Raad, Ibrahim S.; Huang, Xiaojing. (2007-03-12)

This paper presents a new method to improve on block spread OFDM by exploiting time diversity to ensure that the blocks are independent and uncorrelated. Simulation results have shown significant improvement over conventional ...

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