Browsing 2015/1 by Title

Now showing items 1-20 of 39

  • A 1.2 V and 69 mW 60 GHz Multi-channel Tunable CMOS Receiver Design 

    Oncu, Ahmet (Společnost pro radioelektronické inženýrství, 2015-04)
    A multi-channel receiver operating between 56 GHz and 70 GHz for coverage of different 60 GHz bands worldwide is implemented with a 90 nm Complementary Metal-Oxide Semiconductor (CMOS) process. The receiver containing an ...

  • ARQ Protocols in Cognitive Decode-and-Forward Relay Networks: Opportunities Gain 

    Zhang, Zongsheng; Wu, Qihui; Wang, Jinlong (Společnost pro radioelektronické inženýrství, 2015-04)
    In this paper, two novel automatic-repeat-request (ARQ) based protocols were proposed, which exploit coop- eration opportunity inherent in secondary retransmission to create access opportunities. If the signal was not ...

  • Bandwidth Efficient Root Nyquist Pulses for Optical Intensity Channels 

    Fatima, Sabeena; Muhammad, S. Sheikh; Raza, A. D. (Společnost pro radioelektronické inženýrství, 2015-04)
    Indoor diffuse optical intensity channels are bandwidth constrained due to the multiple reflected paths between the transmitter and the receiver which cause considerable inter-symbol interference (ISI). The transmitted ...

  • Copyright Protection of Color Imaging Using Robust-Encoded Watermarking 

    Cedillo-Hernandez, Manuel; Cedillo-Hernandez, Antonio; Garcia-Ugalde, Francisco; Nakano-Miyatake, Mariko; Perez-Meana, Hector (Společnost pro radioelektronické inženýrství, 2015-04)
    In this paper we present a robust-encoded watermarking method applied to color images for copyright protection, which presents robustness against several geometric and signal processing distortions. Trade-off between ...

  • Design of a Wideband Inductively Coupled Loop Feed Patch Antenna for UHF RFID Tag 

    Bashri, Mohd Saiful Riza; Ibn Ibrahimy, Muhammad; Motakabber, S. M. A. (Společnost pro radioelektronické inženýrství, 2015-04)
    A planar wideband patch antenna for ultra-high frequency (UHF) radio frequency identification (RFID) tag for metallic applications is presented in this research work. Three different shape patches are inductively coupled ...

  • Design of High Performance Microstrip Dual-Band Bandpass Filter 

    Khajavi, Nafiseh; Makki, Seyed Vahab Al-Din; Majidifar, Sohrab (Společnost pro radioelektronické inženýrství, 2015-04)
    This paper presents a new design of dual-band bandpass filters using coupled stepped-impedance resonators for wireless systems. This architecture uses multiple couple stubs to tune the passband frequencies and the filter ...

  • Design of Passive Analog Electronic Circuits Using Hybrid Modified UMDA algorithm 

    Slezak, Josef; Gotthans, Tomas (Společnost pro radioelektronické inženýrství, 2015-04)
    Hybrid evolutionary passive analog circuits synthesis method based on modified Univariate Marginal Distribution Algorithm (UMDA) and a local search algorithm is proposed in the paper. The modification of the UMDA algorithm ...

  • Dielectric Properties Determination of a Stratified Medium 

    Yoiyod, Paiboon; Krairiksh, Monai (Společnost pro radioelektronické inženýrství, 2015-04)
    The method of detection of variation in dielectric properties of a material covered with another material, which requires nondestructive measurement, has numerous applications and the accurate measurement system is desirable. ...

  • Direction-of-Arrival Estimation Based on Sparse Recovery with Second-Order Statistics 

    Chen, Hui; Wan, Qun; Fan, Rong; Wen, Fei (Společnost pro radioelektronické inženýrství, 2015-04)
    Traditional direction-of-arrival (DOA) estimation techniques perform Nyquist-rate sampling of the received signals and as a result they require high storage. To reduce sampling ratio, we introduce level-crossing (LC) ...

  • Efficient Spectral Power Estimation on an Arbitrary Frequency Scale 

    Zaplata, Filip; Kasal, Miroslav (Společnost pro radioelektronické inženýrství, 2015-04)
    The Fast Fourier Transform is a very efficient algorithm for the Fourier spectrum estimation, but has the limitation of a linear frequency scale spectrum, which may not be suitable for every system. For example, audio and ...

  • Electromagnetic Scattering and Statistic Analysis of Clutter from Oil Contaminated Sea Surface 

    Qi, Cong-hui; Zhao, Zhi-qin (Společnost pro radioelektronické inženýrství, 2015-04)
    In order to investigate the electromagnetic (EM) scattering characteristics of the three dimensional sea surface contaminated by oil, a rigorous numerical method multilevel fast multipole algorithm (MLFMA) is developed to ...

  • An Electronically Reconfigurable Patch Antenna Design for Polarization Diversity with Fixed Resonant Frequency 

    Osman, Mohamed Nasrun; Rahim, Mohamad Kamal A.; Gardner, Peter; Hamid, Mohamad Rijal; Yusoff, Mohd Fairus Mohd; Majid, Huda A. (Společnost pro radioelektronické inženýrství, 2015-04)
    In this paper, an electronically polarization reconfigurable circular patch antenna with fixed resonant frequency operating at Wireless Local Area Network (WLAN) frequency band (2.4-2.48 GHz) is presented. The structure ...

  • Enhanced Model of Nonlinear Spiral High Voltage Divider 

    Panko, Vaclav; Banas, Stanislav; Burton, Richard; Ptacek, Karel; Divin, Jan; Dobes, Josef (Společnost pro radioelektronické inženýrství, 2015-04)
    This paper deals with the enhanced accurate DC and RF model of nonlinear spiral polysilicon voltage divider. The high resistance polysilicon divider is a sensing part of the high voltage start-up MOSFET transistor that can ...

  • Exact Outage Performance Analysis of Multiuser Multi-relay Spectrum Sharing Cognitive Networks 

    Zhang, Tao; Yang, Weiwei; Cai, Yueming (Společnost pro radioelektronické inženýrství, 2015-04)
    In this paper, we investigate the outage performance of dual-hop multiuser multi-relay cognitive radio networks under spectrum sharing constraints. Using an efficient relay-destination selection scheme, the exact and ...

  • A Fast DOA Estimation Algorithm Based on Polarization MUSIC 

    Guo, Ran; Mao, Xing-Peng; Li, Shao-Bin; Wang, Yi-Ming; Wang, Xiu-Hong (Společnost pro radioelektronické inženýrství, 2015-04)
    A fast DOA estimation algorithm developed from MUSIC, which also benefits from the processing of the signals' polarization information, is presented. Besides performance enhancement in precision and resolution, the proposed ...

  • Fast Implementation of Transmit Beamforming for Colocated MIMO Radar 

    Sharma, Gollakota Venkata Krishna; Rajeswari, Konduri Raja (Společnost pro radioelektronické inženýrství, 2015-04)
    Multiple-input Multiple-output (MIMO) radars benefit from spatial and waveform diversities to improve the performance potential. Phased array radars transmit scaled versions of a single waveform thereby limiting the transmit ...

  • First-Order Statistics Prediction for a Propagation Channel of Arbitrary Non-Geostationary Satellite Orbits 

    Kvicera, Milan; Pechac, Pavel (Společnost pro radioelektronické inženýrství, 2015-04)
    A method enabling the prediction of first-order statistics of received signal level for arbitrary non-geostationary satellite orbits based on a reference dataset for a wide range of elevation angles is introduced for ...

  • Fuzzy Chance-constrained Programming Based Security Information Optimization for Low Probability of Identification Enhancement in Radar Network Systems 

    Shi, Chenguang; Wang, Fei; Zhou, Jianjiang; Chen, Jun (Společnost pro radioelektronické inženýrství, 2015-04)
    In this paper, the problem of low probability of identification (LPID) improvement for radar network systems is investigated. Firstly, the security information is derived to evaluate the LPID performance for radar network. ...

  • An Improved Variable Structure Adaptive Filter Design and Analysis for Acoustic Echo Cancellation 

    Kar, Asutosh; Chandra, Mahesh (Společnost pro radioelektronické inženýrství, 2015-04)
    In this research an advance variable structure adaptive Multiple Sub-Filters (MSF) based algorithm for single channel Acoustic Echo Cancellation (AEC) is proposed and analyzed. This work suggests a new and improved direction ...

  • ISI Cancellation Using Blind Equalizer Based on DBC Model for MIMO-RFID Reader Reception 

    Duangsuwan, Sarun; Promwong, Sathaporn (Společnost pro radioelektronické inženýrství, 2015-04)
    Under the dyadic backscatter channel (DBC) model, a conventional zero forcing (ZF) and minimum mean square error (MMSE) method for MIMO-RFID reader reception are not able to be rapidly cancelled inter-symbol interference ...