Isfahan University of Technology

Displaying 1-5 of 5 results

  • White Papers // May 2012

    OFDM-MSK: A Method for Sidelobe Suppression in OFDM Systems

    Orthogonal Frequency Division Multiplexing (OFDM) systems suffer from high side-lobes level. In some applications, as cognitive radios, this phenomenon can be a serious matter. This paper proposes Minimum Shift Keying (MSK)-OFDM to address this problem. The proposed method is an OFDM system using MSK modulation in each subcarrier. The corresponding...

    Provided By Isfahan University of Technology

  • White Papers // Apr 2011

    Oversampled Legendre Basis Expansion Model for Doubly-Selective Channels

    In broadband wireless communication, high rate data transmission and multipath propagation results in frequency selectivity. On the other hand, high mobility contributes to time selectivity in fading channels. A finite parameter model which can be used for modeling doubly-selective channels is the Basis Expansion Model (BEM). In this model, channel...

    Provided By Isfahan University of Technology

  • White Papers // Apr 2011

    Joint ICI and IBI Cancellation for Underwater Acoustic MIMO-OFDM Systems

    A Time-domain EQualizer (TEQ) is proposed for MIMO-OFDM transmission in Under-Water Acoustic (UWA) channels that simultaneously exhibit large delay and doppler spreads. The aim of the equalizer is to jointly mitigate the Inter-Carrier Interference (ICI) and Inter-Block Interference (IBI). In this paper, the well known Basis Expansion Model (BEM) is...

    Provided By Isfahan University of Technology

  • White Papers // Jan 2011

    Frequency-Domain Equalization for MIMO-OFDM Over Doubly Selective Channels

    Orthogonal Frequency Division Multiplexing (OFDM) systems may confront significant Inter-Carrier Interference (ICI) when applied in doubly selective channels. Furthermore, the insufficient Cyclic Prefix (CP) leads to Inter-Block Interference (IBI) which again results in ICI. These interferences cause an early error floor in conventional receivers. In this paper, the authors characterize...

    Provided By Isfahan University of Technology

  • White Papers // May 2010

    Detection of an LTE Signal Based on Constant False Alarm Rate Methods and Constant Amplitude Zero Autocorrelation Sequence

    In order to detect the presence of Primary User (PU) signal, spectrum sensing is a fundamental requirement to achieve the Cognitive Radio (CR) goals. This ensures the efficient utilization of the spectrum. There are many methods for signal detection such as cyclostationary detection, cyclic prefix detection, energy detection, and detection...

    Provided By Isfahan University of Technology

  • White Papers // May 2010

    Detection of an LTE Signal Based on Constant False Alarm Rate Methods and Constant Amplitude Zero Autocorrelation Sequence

    In order to detect the presence of Primary User (PU) signal, spectrum sensing is a fundamental requirement to achieve the Cognitive Radio (CR) goals. This ensures the efficient utilization of the spectrum. There are many methods for signal detection such as cyclostationary detection, cyclic prefix detection, energy detection, and detection...

    Provided By Isfahan University of Technology

  • White Papers // May 2012

    OFDM-MSK: A Method for Sidelobe Suppression in OFDM Systems

    Orthogonal Frequency Division Multiplexing (OFDM) systems suffer from high side-lobes level. In some applications, as cognitive radios, this phenomenon can be a serious matter. This paper proposes Minimum Shift Keying (MSK)-OFDM to address this problem. The proposed method is an OFDM system using MSK modulation in each subcarrier. The corresponding...

    Provided By Isfahan University of Technology

  • White Papers // Apr 2011

    Oversampled Legendre Basis Expansion Model for Doubly-Selective Channels

    In broadband wireless communication, high rate data transmission and multipath propagation results in frequency selectivity. On the other hand, high mobility contributes to time selectivity in fading channels. A finite parameter model which can be used for modeling doubly-selective channels is the Basis Expansion Model (BEM). In this model, channel...

    Provided By Isfahan University of Technology

  • White Papers // Apr 2011

    Joint ICI and IBI Cancellation for Underwater Acoustic MIMO-OFDM Systems

    A Time-domain EQualizer (TEQ) is proposed for MIMO-OFDM transmission in Under-Water Acoustic (UWA) channels that simultaneously exhibit large delay and doppler spreads. The aim of the equalizer is to jointly mitigate the Inter-Carrier Interference (ICI) and Inter-Block Interference (IBI). In this paper, the well known Basis Expansion Model (BEM) is...

    Provided By Isfahan University of Technology

  • White Papers // Jan 2011

    Frequency-Domain Equalization for MIMO-OFDM Over Doubly Selective Channels

    Orthogonal Frequency Division Multiplexing (OFDM) systems may confront significant Inter-Carrier Interference (ICI) when applied in doubly selective channels. Furthermore, the insufficient Cyclic Prefix (CP) leads to Inter-Block Interference (IBI) which again results in ICI. These interferences cause an early error floor in conventional receivers. In this paper, the authors characterize...

    Provided By Isfahan University of Technology