The Experts below are selected from a list of 309 Experts worldwide ranked by ideXlab platform

R. Kumaresan - One of the best experts on this subject based on the ideXlab platform.

  • Voiced-speech analysis based on the residual Interfering Signal canceler (RISC) algorithm
    Proceedings of ICASSP '94. IEEE International Conference on Acoustics Speech and Signal Processing, 1994
    Co-Authors: C.s. Ramalingam, R. Kumaresan
    Abstract:

    We describe an improved version of our previously proposed feed-back residual Interfering Signal canceler (RISC) algorithm that can now track the phases and amplitudes of the sinewave components present in a Signal without any a priori knowledge. We also give the details of the feed-forward RISC algorithm for tracking the sinewave components present in voiced speech. The effectiveness of these algorithms is demonstrated by processing both synthetic and clean natural speech.

  • ICASSP (1) - Voiced-speech analysis based on the residual Interfering Signal canceler (RISC) algorithm
    Proceedings of ICASSP '94. IEEE International Conference on Acoustics Speech and Signal Processing, 1
    Co-Authors: C.s. Ramalingam, R. Kumaresan
    Abstract:

    We describe an improved version of our previously proposed feed-back residual Interfering Signal canceler (RISC) algorithm that can now track the phases and amplitudes of the sinewave components present in a Signal without any a priori knowledge. We also give the details of the feed-forward RISC algorithm for tracking the sinewave components present in voiced speech. The effectiveness of these algorithms is demonstrated by processing both synthetic and clean natural speech. >

C.s. Ramalingam - One of the best experts on this subject based on the ideXlab platform.

  • Voiced-speech analysis based on the residual Interfering Signal canceler (RISC) algorithm
    Proceedings of ICASSP '94. IEEE International Conference on Acoustics Speech and Signal Processing, 1994
    Co-Authors: C.s. Ramalingam, R. Kumaresan
    Abstract:

    We describe an improved version of our previously proposed feed-back residual Interfering Signal canceler (RISC) algorithm that can now track the phases and amplitudes of the sinewave components present in a Signal without any a priori knowledge. We also give the details of the feed-forward RISC algorithm for tracking the sinewave components present in voiced speech. The effectiveness of these algorithms is demonstrated by processing both synthetic and clean natural speech.

  • ICASSP (1) - Voiced-speech analysis based on the residual Interfering Signal canceler (RISC) algorithm
    Proceedings of ICASSP '94. IEEE International Conference on Acoustics Speech and Signal Processing, 1
    Co-Authors: C.s. Ramalingam, R. Kumaresan
    Abstract:

    We describe an improved version of our previously proposed feed-back residual Interfering Signal canceler (RISC) algorithm that can now track the phases and amplitudes of the sinewave components present in a Signal without any a priori knowledge. We also give the details of the feed-forward RISC algorithm for tracking the sinewave components present in voiced speech. The effectiveness of these algorithms is demonstrated by processing both synthetic and clean natural speech. >

S Kozlowski - One of the best experts on this subject based on the ideXlab platform.

  • time modulated reconfigurable antenna based on integrated s pin diodes for mm wave communication systems
    IEEE Transactions on Antennas and Propagation, 2015
    Co-Authors: Y Yashchyshyn, Krzysztof Derzakowski, Pawel R Bajurko, J Marczewski, S Kozlowski
    Abstract:

    This paper concerns the study of the mm-wave reconfigurable antennas based on S-PIN diodes suitable for using in mm-wave communication systems. The investigated antennas were designed, fabricated, and subjected to the measurements in both steady and transient states. One selected antenna was incorporated into a wireless system to determine its suitability for operating in such a system as a time-modulated linear array. By means of appropriate switching of the antenna, multiple radio frequency (RF) chains were simulated in a receiver having only one RF chain. This allowed applying a combining technique for improving the system performance in a presence of a strong Interfering Signal.

Tetsushi Ikegami - One of the best experts on this subject based on the ideXlab platform.

  • An Interfering Signal Detection Technique Using an Ultra Wideband Chirp Template Waveform
    Wireless Personal Communications, 2012
    Co-Authors: Kohei Ohno, Makoto Itami, Tetsushi Ikegami
    Abstract:

    This paper discusses a coexisting Signal detection technique for sharing the spectrum of an Ultra Wideband (UWB) radio with other radio systems. In some countries’ regulations, the Detection and Avoidance technique is required to be implemented in UWB systems so they do not interfere with other radio systems. In most interference avoidance techniques it is necessary to detect emissions of the Interfering system and the Interfering bands. In this paper, correlation detection is applied for Interfering Signal detection without band pass filters. In the detector, a Chirp-UWB is prepared as a template waveform. The Signal received before UWB communications is correlated with the Chirp-UWB template waveform, and is then integrated. The integral period is decided from the sweep function of the Chirp-UWB and the Interfering bands. Therefore the detection technique can detect arbitrary frequency band Signals by modifying the integral period. The sweep function of the Chirp-UWB also improves the detection performance. A sine function is adopted for the sweep function of the chirp. The miss Detection Error Rate and False Alarm Rate are evaluated to show the effectiveness of the proposed interference detection technique.

  • Interfering Signal detection by using sub-band pulses of a multi-carrier template pulse for DAA operation
    2011 IEEE International Conference on Ultra-Wideband (ICUWB), 2011
    Co-Authors: Kohei Ohno, Makoto Itami, Tetsushi Ikegami
    Abstract:

    This paper discusses the Interfering Signal detection technique for DAA (Detection And Avoidance) operation of an UWB (Ultra Wideband) systems. To detect the Interfering Signal, sub-band pulses of a multi-carrier type are prepared as template waveform in the detector. The received Signal is correlated with the sub-band pulses and the correlation values are compared with the threshold value. The proposed detection technique is applied for the correlation detection that is often used for the demodulation scheme of the pulse-based UWB system. The DER (Detection Error Rate) and FAR (False Alarm Rate) performance are evaluated to show the effectiveness of the proposed Interfering Signal detection technique and the performances are compared with the ordinary scheme by using FFT. The optimum sub-band pulse width is also derived to be obtained better detection performance.

  • Interfering Signal detection by using Chirp-UWB template waveform
    2008 IEEE International Conference on Ultra-Wideband, 2008
    Co-Authors: Kohei Ohno, Tetsushi Ikegami
    Abstract:

    This paper discusses an interference detection technique for ultra wideband (UWB) to share the spectrum with other radio system. A detection and avoidance (DAA) technique are required in UWB system from some countries regulations. In most of interference mitigation techniques, it is required to detect existence of Interfering Signal and its band. However, some band pass filters are needed to detect various Interfering bands detected used by the conventional energy detection. In this paper, the correlation detection is applied for the Interfering Signal detection without band pass filters. In UWB receiver, a chirp-UWB is prepared as a template waveform. The received Signal before UWB communication is correlated with the chirp-UWB template waveform, and the Signal is integrated. The integral period is decided from sweep function of the chirp-UWB depending on the Interfering bands. The sweep function of the Chirp-UWB is also considered to improve the performance. The sine function is adopted for the sweep function. The miss detection error rate (DER) and false alarm rate (FAR) are evaluated to show the effectiveness of proposed interference detection technique.

Andreas Rossholm - One of the best experts on this subject based on the ideXlab platform.

  • Notch Filtering of humming GSM mobile telephone noise
    2005 5th International Conference on Information Communications & Signal Processing, 2005
    Co-Authors: Ingvar Claesson, Andreas Rossholm
    Abstract:

    A common problem in the world's most widespread cellular telephone system, the GSM system, is the Interfering Signal generated in TDMA cellular telephony. The infamous "bumblebee" is generated by the switching nature of TDMA cellular telephony, the radio circuits are switched on and off at a rate of approximately 217 Hz (GSM). This paper describes a study of two solutions for eliminating the humming noise with IIR notch filters. The simpler one is suitable for any exterior equipment. This method still suffers from a small residual of the noise, resulting from the IDLE slots of the sending mobile. The more advanced IIR structure for use within the mobile also eliminates this residual