The Experts below are selected from a list of 62070 Experts worldwide ranked by ideXlab platform

Milica Pejanovic-djurisic - One of the best experts on this subject based on the ideXlab platform.

  • WPMC - Symbol error rate for Ricean fading channel with random K parameter
    2011
    Co-Authors: Maja Ilic-delibasic, Milica Pejanovic-djurisic
    Abstract:

    In this paper we analyze symbol error probability of a Digital Communication System over wireless fading channel, where the random signal envelope fluctuations are described with Ricean fading distribution. Instead of considering only the envelope, i.e. instantaneous signal-to-noise ratio (SNR) as a random variable, whereas Ricean K factor is deterministic parameter, we examine implications and insights that can be drawn from assuming a fading channel environment characterized with a random Ricean K factor. A novel moment generating function (MGF) of a such new distribution is derived and average symbol error rate (SER) for single and multi-channel receptions are obtained.

  • Symbol error rate for Ricean fading channel with random K parameter
    2011 The 14th International Symposium on Wireless Personal Multimedia Communications (WPMC), 2011
    Co-Authors: Maja Ilic-delibasic, Milica Pejanovic-djurisic
    Abstract:

    In this paper we analyze symbol error probability of a Digital Communication System over wireless fading channel, where the random signal envelope fluctuations are described with Ricean fading distribution. Instead of considering only the envelope, i.e. instantaneous signal-to-noise ratio (SNR) as a random variable, whereas Ricean K factor is deterministic parameter, we examine implications and insights that can be drawn from assuming a fading channel environment characterized with a random Ricean K factor. A novel moment generating function (MGF) of a such new distribution is derived and average symbol error rate (SER) for single and multi-channel receptions are obtained.

W M Campbell - One of the best experts on this subject based on the ideXlab platform.

  • an adaptive rate Digital Communication System for speech
    International Conference on Acoustics Speech and Signal Processing, 1997
    Co-Authors: John Eric Kleider, W M Campbell
    Abstract:

    Current Digital voice Communication Systems allow only modest levels of protection of the coded speech and often do not follow the dynamic changes that occur in the transmission channel. We present a method that provides optimal voice quality and intelligibility for any given transmission channel condition. The approach is performed via adaptive-rate voice (ARV) coding using an adaptive-rate modem, channel coding, and a multimode sinusoidal transform coder. In general, the receiver utilizes channel state information to not only optimally demodulate and decode the currently corrupted symbols from the channel, but also to inform the transmitter, via a feedback channel, of the optimal strategy for voice/channel coding and modulation format. We compare several source-channel coding schemes at multiple transmission symbol rates and compare the performance to fixed aggregate-rate channel-controlled variable rate voice coding Systems.

Maja Ilic-delibasic - One of the best experts on this subject based on the ideXlab platform.

  • WPMC - Symbol error rate for Ricean fading channel with random K parameter
    2011
    Co-Authors: Maja Ilic-delibasic, Milica Pejanovic-djurisic
    Abstract:

    In this paper we analyze symbol error probability of a Digital Communication System over wireless fading channel, where the random signal envelope fluctuations are described with Ricean fading distribution. Instead of considering only the envelope, i.e. instantaneous signal-to-noise ratio (SNR) as a random variable, whereas Ricean K factor is deterministic parameter, we examine implications and insights that can be drawn from assuming a fading channel environment characterized with a random Ricean K factor. A novel moment generating function (MGF) of a such new distribution is derived and average symbol error rate (SER) for single and multi-channel receptions are obtained.

  • Symbol error rate for Ricean fading channel with random K parameter
    2011 The 14th International Symposium on Wireless Personal Multimedia Communications (WPMC), 2011
    Co-Authors: Maja Ilic-delibasic, Milica Pejanovic-djurisic
    Abstract:

    In this paper we analyze symbol error probability of a Digital Communication System over wireless fading channel, where the random signal envelope fluctuations are described with Ricean fading distribution. Instead of considering only the envelope, i.e. instantaneous signal-to-noise ratio (SNR) as a random variable, whereas Ricean K factor is deterministic parameter, we examine implications and insights that can be drawn from assuming a fading channel environment characterized with a random Ricean K factor. A novel moment generating function (MGF) of a such new distribution is derived and average symbol error rate (SER) for single and multi-channel receptions are obtained.

Huaping Liu - One of the best experts on this subject based on the ideXlab platform.

  • A Communication System Based on Walsh–Hadamard Codes and Constellations for Fading Environments
    IEEE Transactions on Vehicular Technology, 2008
    Co-Authors: Mario E. Magaña, W. Moranvil, Huaping Liu
    Abstract:

    In this paper, we investigate a new Digital Communication System based on Walsh-Hadamard codes. The modulator maps a uniformly distributed binary source to a set of symbols with a Gaussian-like distribution. These symbols are then mapped to a 2-D constellation in such a way that performance is improved when transmission occurs over Rayleigh fading channels. We assess the performance of these modulation schemes when the channel is of the nonfrequency-selective Rayleigh fading plus white Gaussian noise type and compare the results to conventional quadrature-amplitude modulation (QAM) schemes with comparable spectral efficiencies. The proposed System provides excellent robustness to fading without the use of common diversity schemes employed in M-ary signaling Systems to improve bit-error-rate (BER) performance in such environments.

John Eric Kleider - One of the best experts on this subject based on the ideXlab platform.

  • an adaptive rate Digital Communication System for speech
    International Conference on Acoustics Speech and Signal Processing, 1997
    Co-Authors: John Eric Kleider, W M Campbell
    Abstract:

    Current Digital voice Communication Systems allow only modest levels of protection of the coded speech and often do not follow the dynamic changes that occur in the transmission channel. We present a method that provides optimal voice quality and intelligibility for any given transmission channel condition. The approach is performed via adaptive-rate voice (ARV) coding using an adaptive-rate modem, channel coding, and a multimode sinusoidal transform coder. In general, the receiver utilizes channel state information to not only optimally demodulate and decode the currently corrupted symbols from the channel, but also to inform the transmitter, via a feedback channel, of the optimal strategy for voice/channel coding and modulation format. We compare several source-channel coding schemes at multiple transmission symbol rates and compare the performance to fixed aggregate-rate channel-controlled variable rate voice coding Systems.