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Consumer Electronics, IEEE Transactions on

Issue 2 • Date May 2009

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Displaying Results 1 - 25 of 104
  • IEEE Transactions on Consumer Electronics - Table of contents

    Page(s): C1
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    Freely Available from IEEE
  • IEEE Consumer Electronics Society

    Page(s): C2
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    Freely Available from IEEE
  • 2009 IEEE Consumer Electronics Society

    Page(s): i
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    Freely Available from IEEE
  • 2009 IEEE Consumer Electronics Society officers and committee chairs

    Page(s): ii
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    Freely Available from IEEE
  • Optical image stabilizing system using multirate fuzzy PID controller for mobile device camera

    Page(s): 303 - 311
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3059 KB) |  | HTML iconHTML  

    A new optical image stabilizing system for a small mobile device camera is presented. A gyro sensor is used to detect the amount of shaking, and a charge-coupled device (CCD) is shifted to correct the deviated optical axis using a voice coil motor (VCM). Because the VCM is nonlinear, unstable, and time-varying, a new adaptive control technique--multirate fuzzy PID control - is proposed. Our new method is capable of providing improved control with low power consumption. We show clear, stabilized results for a variety of digital photographs taken under conditions of vibration. View full abstract»

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  • Compact programmable network display system for portable projectors

    Page(s): 312 - 315
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (638 KB) |  | HTML iconHTML  

    This paper describes a compact display system with a network interface designed to receive video signals from an external server device such as a PC. This system has been built on a small printed circuit board (PCB) with an embedded DSP&CPU chip, and has been integrated into our prototype portable projector. With this PCB, the projector is capable of displaying multiple PC desktop screens from remote PCs connected through a network on a single projector screen. In addition, using the DSP's ability to decode compressed audio and video signals, the projector can be used to display network video streaming. In order to minimize its size the network interface is made detachable by using a network adaptor on a USB port. This architecture makes it highly configurable and easy to change its functions according to customers' needs. Following the description of its hardware and software architecture, we set forth the method introduced to debug the system software with the final prototype board using the wireless network connection established through the USB wireless LAN network adaptor. View full abstract»

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  • Channel estimation based on path separation for DVB-T in long delay situations

    Page(s): 316 - 321
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (568 KB) |  | HTML iconHTML  

    A least square (LS) channel estimation with pilots uses interpolation to obtain the channel information for the positions of data subcarriers in orthogonal frequency division multiplexing (OFDM) systems. However, the interpolation introduces estimation errors in long delay channels that usually happen in single frequency networks (SFNs). In this paper, we propose an algorithm that estimates the accurate channel information by separating channel paths. The performance is compared with conventional algorithms for DVB-T in SFN conditions1. View full abstract»

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  • A direct digital frequency synthesizer based on two segment fourth-order parabolic approximation

    Page(s): 322 - 326
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (457 KB) |  | HTML iconHTML  

    A novel design is presented about ROM-less direct digital frequency synthesizer (DDFS) using phase to sinusoid amplitude conversion blocks based on the two segment fourth-order parabolic approximation. The mathematical maximum error analysis shows that the resolution is up to 14 bits. In order to reduce the hardware complexity without sacrificing speed, the squarer and constant multipliers have been decomposed and optimized. The whole architecture has been split into twenty pipelining stages with a 200 MHz clock rate and a single phase output up to 50 MHz. Meanwhile, because the sine and cosine phase to amplitude modules share the same hardware, reduction of hardware complexity and power consumption can be achieved. Spectral purity analysis shows that the worst case spurious free dynamic range (SFDR) is about -90 dBc. The implementation demonstrates that the proposed DDFS architecture can be realized with a smaller hardware scale and lower power consumption than many other existing approaches. View full abstract»

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  • Accounting for data intermittency in a software gnss receiver

    Page(s): 327 - 333
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (619 KB) |  | HTML iconHTML  

    In a GNSS software receiver, blocks of digitized intermediate-frequency (IF) data are prepared at the front end and sent to the processing unit for signal acquisition, tracking, demodulation, and position fix. A problem that is observed in practice when the GNSS software module is co-located with a mobile phone device is that the digitized IF data are subject to data intermittency. The intermittency results from the use of mobile phone when the GNSS signals are being received or the execution of higher priority routine in the host computer. An improper buffering scheme at the front end may also lead to such phenomena. Such data intermittency leads to burst-type errors (rather than bit-type errors) on the data to be processed, posing a challenge for the tracking of the GNSS signals. Indeed, if not properly handled, a typical tracking algorithm is not able to accommodate such a large data gap. In the paper, a decision-aided tracking algorithm is developed for a seamless tracking of codes and phases. The effects of data intermittency on code and phase tracking are analyzed. To accounting for the effect without going through the reacquisition process, a detector based on signal power and continuity is then implemented to facilitate decision making. It is shown, through the processing of field gathered data, that the proposed algorithm can indeed be able to continuously track codes and phases in the presence of data intermittency. View full abstract»

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  • On the integration of ultra wideband antennas in DVD players

    Page(s): 334 - 341
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1960 KB) |  | HTML iconHTML  

    Impulse radio (IR) ultra wideband (UWB) is one of the possible wireless technologies to develop indoor high data rate communication systems. Due to their high bandwidth, UWB antennas introduce distortion influenced by the device where they are integrated, decreasing the system performance in terms of bit error rate (BER). The goal of this paper is to provide a method to evaluate the best location of an antenna near a consumer device, and particularly a DVD player. The proposed method analyses the most important factors that maximize the BER by means of an electromagnetic vision study (EVS) and a fidelity analysis. These quantitative evaluations identify the best position of the antenna in terms of power and distortion. View full abstract»

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  • A multi-technology location-aware wireless system for interactive fruition of multimedia contents

    Page(s): 342 - 350
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1480 KB) |  | HTML iconHTML  

    Nowadays, due to the increasing demands of the fast-growing consumer electronics (CEs) market, more powerful mobile consumer devices are being introduced continuously. With this evolution of CEs technologies, many sophisticated electronic applications starts to be developed and applied to context and location aware scenarios. This paper proposes a flexible communication architecture well suited for the interactive fruition of historical and artistic contents throughout a wireless network infrastructure. The designed system and the implemented low cost testbed integrate different communication technologies such as Wi-Fi, Bluetooth and GPS with the aim of offering, in a transparent and reliable way, a mixed set of different multimedia and augmented reality (AR) contents to mobile users equipped with CEs devices. This communication architecture represents a first step to provide a network support to context-aware applications pushing the ubiquitous computing paradigm into the reality. View full abstract»

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  • Modeling of RF filter component based on film bulk acoustic resonator

    Page(s): 351 - 355
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (622 KB) |  | HTML iconHTML  

    Film bulk acoustic resonator (FBAR) is widely used as an individual component RF filter in RF circuit because of its very high Q factor and low temperature coefficient. However, the RF pads and bonding wires of FBAR component will lower its Q factor. This effect is modeled by a new model named as PMBVD based on the traditional modified Butterworth-Van Dyke (MBVD) model in this paper. PMBVD model can describe FBAR individual component more exactly than MBVD model, especially near FBAR operating frequency, as proved by test results. The influences by different kinds of RF pads are also analyzed based on PMBVD. The simulations based on PMBVD show that optimized RF pads can enhance whole device Q factor to meet demands. View full abstract»

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  • PTS-clipping method to reduce the PAPR in ROF-OFDM system

    Page(s): 356 - 359
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (351 KB) |  | HTML iconHTML  

    In this paper, a novel method combined the linear and nonlinear methods, named as partial transmit sequence followed by clipping (PTS-Clipping), is proposed to reduce the peak-to-average power ratio (PAPR) of radio over fiber and orthogonal frequency division multiplexing (ROF-OFDM) system. The main technique of this method is clipping the processed signal whose probability of the peak value has been reduced by PTS technique. Then the PAPR value will be further reduced. It will bring in slight change to the BER performance between with and without clipping. We know that both the ROF and OFDM techniques are key issues of the next generation network. Reduce the PAPR of OFDM is a necessary work. The simulation results show the feasibility of this method. View full abstract»

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  • An efficient impulsive noise mitigation scheme for over-sampled OFDM systems

    Page(s): 360 - 365
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (450 KB) |  | HTML iconHTML  

    Impulsive noise severely affects the performance of wireless communication systems. In orthogonal frequency division multiplexing (OFDM) systems, detecting impulsive interference is challenging since both OFDM signals and impulsive noise follow Gaussian distributions. This paper proposes windowing nonlinearity scheme to detect and remove the over-sampled impulsive interference in OFDM systems. The analysis of the false detection probability (FDP) and successful detection probability (SDP) is given. The results indicate that the proposed scheme detects impulsive noise efficiently. In addition, the closed-form expressions for the FDP and SDP of blanking nonlinearity scheme which is widely used to remove impulsive interference are also derived. View full abstract»

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  • An algorithm for calibration of TDS-OFDM carrier frequency offset

    Page(s): 366 - 370
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (359 KB) |  | HTML iconHTML  

    A synchronous algorithm applicable for time domain synchronous orthogonal frequency division multiplexing (TDS-OFDM) carrier frequency offset (CFO) is proposed in the thesis. This algorithm is based on pseudonoise (PN) sequence and two kinds of maximum likelihood estimation (MLE) algorithms are employed in frequency offset estimation. The first MLE could be implemented by fast Fourier transform (FFT), which is applicable for the calibration of integral frequency offset. The second MLE algorithm is employed in the estimation of decimal frequency offset. Although the MLE themselves are very common, these two MLE algorithms could compensate the deficiencies of each other, and could obtain satisfying results. The Cramer-Rao (CRO) lower bound of the algorithm is deduced in the thesis so as to evaluate the performance of the algorithm. According to the simulation results, even if under the circumstances of a very low SNR, the estimations on different frequency offsets are close to the CRO lower bound. View full abstract»

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  • Cognitive communication device for vehicular networking

    Page(s): 371 - 375
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (385 KB) |  | HTML iconHTML  

    This paper presents intelligent Communication protocols for universal access in a proposed Vehicular Networking Device. The device can communicate on multiple frequency bands using different MAC and PHY Interfaces. The device cannot use existing routing protocols as they are limited and work in relation with a unique MAC and PHY Interface. This paper presents the communication protocols and vehicular device that extends the routing protocols to work as a Cognitive layer over multiple MAC and PHY Interface for optimum connectivity, seamless switching and Quality of Service parameters. The device is tested with three extended routing protocols AODV-MI, GOLSR-MI and SORP. The device incorporates integrated multi telecommunication technologies like GSM, Satellite, VHF, UHF, HF, Broadband Wireless and wired links. View full abstract»

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  • Distributed execution for resource-constrained mobile consumer devices

    Page(s): 376 - 384
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (497 KB) |  | HTML iconHTML  

    Mobile consumer devices take increasingly important roles, more closely and personally interacting with users. As users get used to mobile devices, they often want the same level of computing experience as they can have from desktop PCs, but still in small and light form factors. Considering current technology, we find the limitations of the processor and the memory are still too big in current mobile devices to satisfy demanding mobile users. To alleviate resource limitations, many researchers explored techniques to share the resources of powerful surrogate servers nearby. In that line of research, we propose slim execution for an effective mobile computing paradigm. To experimentally verify our execution model, we develop a code transforming tool, distributed execution transformer (DiET). The DiET takes original Java bytecode and replaces the bodies of heavy methods with remote procedure calls to surrogate servers. Since the modified bytecode is still a legal Java bytecode, mobile devices can download and run the modified bytecode on standard JVMs, cooperating with surrogate servers. Our experiments with the SciMark 2.0 show our distributed execution scheme reduces the execution time by up to 71%. View full abstract»

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  • Frequency offset mitigation of cooperative ofdm system in wireless digital broadcasting

    Page(s): 385 - 390
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (954 KB) |  | HTML iconHTML  

    Mobile digital broadcasting is expected to become a promising application in future wireless communication. To improve the system performance in limitation of size and cost, the OFDM and MIMO techniques are adopted. Recently, cooperative diversity techniques are developed to be a solution. In this paper, we propose the carrier frequency offset mitigation scheme in cooperative communication using multi-symbol encapsulated orthogonal frequency division multiplexing (MSE-OFDM), in which one cyclic prefix (CP) is used for multiple OFDM symbols. We use the FFT size-reduced MSE-OFDM system which can be used to reduce the peak-to-average power ratio (PAPR) and improve the robustness to carrier frequency offset. The cooperative communication uses not only direct path from source to destination but also indirect path via relay station. Each different relays require more precise frequency synchronization and lower PAPR, so we adopt the MSEOFDM to increase the system performance. The performance analysis of cooperative MSE-OFDM in multipath fading channels has been done and the effect of carrier frequency offset and PAPR have been studied. View full abstract»

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  • Robust time-domain timing and frequency synchronization for OFDM systems

    Page(s): 391 - 399
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (384 KB) |  | HTML iconHTML  

    A robust and efficient technique for frame/symbol timing and carrier frequency synchronization in OFDM systems is presented. It uses a preamble consisting of only one training symbol with two identical parts to achieve reliable timing and frequency accuracy in the time-domain, over a wide frequency estimation range which can be up to half of the signal sampling frequency. Also, it has a low complexity which is adaptive to the degree of channel distortion. Computer simulations in the Rayleigh fading ISI channel show that the proposed method achieves superior performance to existing techniques in terms of timing and frequency accuracy. Also, its operation in the time-domain helps to achieve faster synchronization convergence. View full abstract»

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  • A high-performance and memory-efficient VLSI architecture with parallel scanning method for 2-D lifting-based discrete wavelet transform

    Page(s): 400 - 407
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (706 KB) |  | HTML iconHTML  

    In this paper, we present a high performance and memory-efficient pipelined architecture with parallel scanning method for 2-D lifting-based DWT in JPEG2000 applications. The Proposed 2-D DWT architecture are composed of two 1-D DWT cores and a 2times2 transposing register array. The proposed 1-D DWT core consumes two input data and produces two output coefficients per cycle, and its critical path takes one multiplier delay only. Moreover, we utilize the parallel scanning method to reduce the internal buffer size instead of the line-based scanning method. For the NtimesN tile image with one-level 2-D DWT decomposition, only 4N temporal memory and the 2times2 register array are required for 9/7 filter to store the intermediate coefficients in the column 1-D DWT core. And the column-processed data can be rearranged in the transposing array. According to the comparison results, the hardware cost of the 1-D DWT core and the internal memory requirements of proposed 2-D DWT architecture are smaller than other familiar architectures based on the same throughput rate. The implementation results show that the proposed 2-D DWT architecture can process 1080 p HDTV pictures with five-level decomposition at 30 frames/sec. View full abstract»

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  • Low complexity synchronization design of an OFDM receiver for DVB-T/H

    Page(s): 408 - 413
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1132 KB) |  | HTML iconHTML  

    In this paper, an OFDM baseband receiver for DVB-T/H is presented. The receiver contains four synchronizations, an OFDM symbol synchronization, a carrier synchronization, a sampling clock synchronization and a scattered pilots synchronization. This paper proposes several novel designs to reduce the synchronization latency and hardware complexity. The carrier and clock synchronization loops are fully digitalized schemes. The scattered pilots synchronization adopts a two stages scheme to reduce the detection latency. In addition, the pre-filling scheme reduces the latency of channel estimation. The design result shows that the equivalent gate count is about 810 K gates including 102.8 KB memory. View full abstract»

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  • Enabling cooperation of consumer devices through peer-to-peer overlays

    Page(s): 414 - 421
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (552 KB) |  | HTML iconHTML  

    This paper introduces the use of peer-to-peer (P2P) architectures when adopted as a technology enabler for assuring cooperation among cost-effective consumer devices, that increasingly support some kind of network connectivity. As a proofofconcept we exploit p2p to build a look-up infrastructure for Internet telephony-oriented applications with instant messaging (IM) and presence functionalities. The contributions of the paper are: i) understanding the reliability of p2p when is put in place instead of classical centralized solutions; ii) precisely quantifying whether consumer devices could be able to properly handle the needed degree of participation; iii) investigating properties of the overlay built by cooperating devices; iv) studying whether the p2p paradigm could be also applied to machinery deployed for "production quality" purposes. A performance evaluation is provided to quantify the effectiveness of the proposed solutions. View full abstract»

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  • A zigbee-based home automation system

    Page(s): 422 - 430
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1233 KB) |  | HTML iconHTML  

    In recent years, the home environment has seen a rapid introduction of network enabled digital technology. This technology offers new and exciting opportunities to increase the connectivity of devices within the home for the purpose of home automation. Moreover, with the rapid expansion of the Internet, there is the added potential for the remote control and monitoring of such network enabled devices. However, the adoption of home automation systems has been slow. This paper identifies the reasons for this slow adoption and evaluates the potential of ZigBee for addressing these problems through the design and implementation of a flexible home automation architecture. A ZigBee based home automation system and Wi-Fi network are integrated through a common home gateway. The home gateway provides network interoperability, a simple and flexible user interface, and remote access to the system. A dedicated virtual home is implemented to cater for the system's security and safety needs. To demonstrate the feasibility and effectiveness of the proposed system, four devices, a light switch, radiator valve, safety sensor and ZigBee remote control have been developed and evaluated with the home automation system. View full abstract»

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  • Content sharing between home networks by using personal information and associated fuzzy vault scheme

    Page(s): 431 - 437
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (540 KB) |  | HTML iconHTML  

    Content sharing is getting popular in home network as well as in social media. Content sharing inside home is usually done among family members, while that between different home networks is done by friends and even anonymous users. Especially, anonymous users could access contents in home networks which could act like home portals. To protect content in home servers, the contents can be encrypted by key and the key can be shared among users. However it is quite challenging to distribute the key to anonymous users. In this paper, we present a method for sharing contents securely among different home networks. We propose a method of content sharing between anonymous users, who have similar personal preferences about the contents. The personal preferences include user profiles and contents preference. With the proposed method, a content sharing community is created for content delivery between different home networks. The community allows content creators to deliver contents to other users, who have similar personal information and can consume the contents without any leakage of personal information. In order to verify the usefulness of the proposed method, experiments were performed. The results showed that contents in one home server were securely shared with users of the other home server, if both have similar personal information. View full abstract»

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  • A handoff packet marker for diffserv in mobile IP-based networks with packet buffering

    Page(s): 438 - 445
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (701 KB) |  | HTML iconHTML  

    Performance of TCP can be severely degraded in mobile IP-based wireless networks where packet losses not related to network congestion occur frequently during inter-subnetwork handoffs by user mobility. To solve such a problem in the networks using Mobile IP, the packet buffering method at a base station recovers those packets dropped during handoff by forwarding the buffered packets at the old base station to the mobile users. But, when the mobile user moves to a congested base station in a new foreign subnetwork, those buffered packets forwarded by the old base station are dropped and TCP transmission performance of a mobile user degrades severely. In this paper, a PBM (packet buffering marker) at a base station is proposed to prevent burst losses of out-of-profile packets during handoffs for DiffServ Assured Services. From simulation results, it is shown that PBM scheme improves TCP throughputs of an Assured Service flow during handoffs. View full abstract»

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Aims & Scope

The primary purpose for publishing the Transactions of the Consumer Electronics Society is to present to the membership and the engineering community in general, papers on new technology oriented to Consumer Electronics.

 

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
R. Simon Sherratt
School Director for Teaching and Learning, School of Systems Engineering
The University of Reading
Reading, Berkshire  RG6 6AY  RG6 6AY  U.K.
r.s.sherratt@reading.ac.uk; sherratt@ieee.org
Phone:+44 (0) 118 3788588
Fax:+44 (0) 118 3788583