The Experts below are selected from a list of 9 Experts worldwide ranked by ideXlab platform

Cheun K - One of the best experts on this subject based on the ideXlab platform.

  • A modified Midtread frequency quantization scheme for digital phase-locked loops
    IEICE-INST ELECTRONICS INFORMATION CO, 2019
    Co-Authors: Roh H, Cheun K
    Abstract:

    A novel modified Midtread Quantizer is proposed for number-controlled oscillator frequency quantization in digital phase-locked loops (DPLLs). We show that DPLLs employing the proposed Quantizer provide significantly improved cycle slip performance compared to those employing conventional Midtread or midrise Quantizers, especially when the number of quantization bits is small and the magnitude of input signal frequency normalized by the quantization interval is less than 0.5.open111sciescopu

Roh H - One of the best experts on this subject based on the ideXlab platform.

  • A modified Midtread frequency quantization scheme for digital phase-locked loops
    IEICE-INST ELECTRONICS INFORMATION CO, 2019
    Co-Authors: Roh H, Cheun K
    Abstract:

    A novel modified Midtread Quantizer is proposed for number-controlled oscillator frequency quantization in digital phase-locked loops (DPLLs). We show that DPLLs employing the proposed Quantizer provide significantly improved cycle slip performance compared to those employing conventional Midtread or midrise Quantizers, especially when the number of quantization bits is small and the magnitude of input signal frequency normalized by the quantization interval is less than 0.5.open111sciescopu

Al-janabi M. - One of the best experts on this subject based on the ideXlab platform.

  • Nonlinear stability prediction of multibit delta--sigma modulators for sinusoidal inputs
    'Institute of Electrical and Electronics Engineers (IEEE)', 2014
    Co-Authors: Lota J., Al-janabi M.
    Abstract:

    This paper proposes a novel algorithm that can be integrated with various design and evaluation tools, to more accurately and rapidly predict stability in multibit delta--sigma (Δ--Σ) modulators. Analytical expressions using the nonlinear gains from the concept of modified nonlinearity in control theory are incorporated into the mathematical model of multibit Δ--Σ modulators to predict the stable amplitude limits for sinusoidal input signals. The nonlinear gains lead to a set of equations, which can numerically estimate the Quantizer gain as a function of the input sinusoidal signal amplitude. This method is shown to accurately predict the stable amplitude limits of sinusoids for second--sixth-order three- and five-level Midtread Quantizer-based Δ--Σ modulators. The algorithm is simple to apply and can be extended to midrise Quantizers or to any number of Quantizer levels. The only required input parameters for this algorithm are the number of Quantizer levels and the coefficients of the noise transfer function

Lota J. - One of the best experts on this subject based on the ideXlab platform.

  • Nonlinear stability prediction of multibit delta--sigma modulators for sinusoidal inputs
    'Institute of Electrical and Electronics Engineers (IEEE)', 2014
    Co-Authors: Lota J., Al-janabi M.
    Abstract:

    This paper proposes a novel algorithm that can be integrated with various design and evaluation tools, to more accurately and rapidly predict stability in multibit delta--sigma (Δ--Σ) modulators. Analytical expressions using the nonlinear gains from the concept of modified nonlinearity in control theory are incorporated into the mathematical model of multibit Δ--Σ modulators to predict the stable amplitude limits for sinusoidal input signals. The nonlinear gains lead to a set of equations, which can numerically estimate the Quantizer gain as a function of the input sinusoidal signal amplitude. This method is shown to accurately predict the stable amplitude limits of sinusoids for second--sixth-order three- and five-level Midtread Quantizer-based Δ--Σ modulators. The algorithm is simple to apply and can be extended to midrise Quantizers or to any number of Quantizer levels. The only required input parameters for this algorithm are the number of Quantizer levels and the coefficients of the noise transfer function

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

  • Performance Evaluation of Finite-Resolution IR-UWB Signal Detection
    2016
    Co-Authors: Ma Yan, Sun Fei, P. R. China, Li Peng, Yin Huarui
    Abstract:

    Abstract—Finite-resolution digital receiver is considered to be a potential solution to meet the severe demand of ADC that results from wideband of IR-UWB signal. However, the quantized distortion is totally different from full-resolution quantized signal. In this paper, the finite-resolution quantized signal model is derived. Based on the correlation receiver, estimation and detection performance of finite-resolution and full-resolution digital receiver are analyzed in the paper. The analytical results agree with the numerical results exactly and the template estimation performance using Midtread Quantizer is better than that using the adjacent midrise Quantizer. Keywords-UWB; finite resolution; detection I