The Experts below are selected from a list of 180 Experts worldwide ranked by ideXlab platform

Jiamin Li - One of the best experts on this subject based on the ideXlab platform.

  • MLICOM (2) - Two-Phase Prototype Filter Design for FBMC Systems
    Machine Learning and Intelligent Communications, 2018
    Co-Authors: Zhijiang Xu, Weidang Lu, Jiamin Li
    Abstract:

    FBMC has been taken as a candidate waveform for the next enhanced 5th generation (5G). To further improve its advantages over OFDM as well as to promote its application in burst transmission, a two-phase method is applied to design its prototype filter, i.e. a square-root Nyquist filter. In this method, the autocorrelation-based technique and a spectral factorization aimed at minimum stopband energy are successively exploited to acquire the final prototype filter. Through the relaxation of Nyquist Condition and benefited from the nonlinear-phase, the frequency selectivity of our designed filters can be greatly improved. Furthermore, the performances of the proposed prototype filter brings a better BER in simulations, which demonstrates the effectiveness of our square-root Nyquist filter design for FBMC systems.

  • two phase prototype filter design for fbmc systems
    International Conference on Machine Learning, 2017
    Co-Authors: Zhijiang Xu, Weidang Lu, Jiamin Li
    Abstract:

    FBMC has been taken as a candidate waveform for the next enhanced 5th generation (5G). To further improve its advantages over OFDM as well as to promote its application in burst transmission, a two-phase method is applied to design its prototype filter, i.e. a square-root Nyquist filter. In this method, the autocorrelation-based technique and a spectral factorization aimed at minimum stopband energy are successively exploited to acquire the final prototype filter. Through the relaxation of Nyquist Condition and benefited from the nonlinear-phase, the frequency selectivity of our designed filters can be greatly improved. Furthermore, the performances of the proposed prototype filter brings a better BER in simulations, which demonstrates the effectiveness of our square-root Nyquist filter design for FBMC systems.

  • Design of FBMC waveform by exploiting a NPR prototype filter
    2017 Advances in Wireless and Optical Communications (RTUWO), 2017
    Co-Authors: Feng Li, Dongming Wang, Jiamin Li
    Abstract:

    Filter bank multicarrier (FBMC) has been taken as a candidate modulation for the 5th generation (5G) mobile network, because it exploits well-shaped prototype filters to reduce the inter-symbol-interference (ISI) and inter-carrier-interference (ICI) in OFDM system. To achieve more flexibility in filter performances, this paper designs nearly perfect reconstruction (NPR) filters by relaxing the Nyquist Condition (NYQ), and then, the spectral factorization is employed to extract the final prototype filters. As a result, the proposed prototype filter can outperform the generally used PHYDYAS filter in terms of the frequency selectivity, which leads to better bit-error-rate (BER) result in computer simulations of FBMC.

Dongming Wang - One of the best experts on this subject based on the ideXlab platform.

  • the nonlinear phase design of fbmc prototype filter based on filter coefficient symmetry characteristic
    Wireless Networks, 2020
    Co-Authors: Yu Zhang, Feng Li, Dongming Wang
    Abstract:

    To promote filter bank multicarrier (FBMC) in future communication, a novel design method of nonlinear phase FIR filter (NLPFF) is proposed under the principle of constrained minimax (CMM), by which the designed filter will act as the FBMC prototype filter. In this method, the filter coefficient symmetry characteristic (FCSC) is exploited in replace of the conventional phase response error (PRE), which simplifies the establishment of phase constraint and benefits the construction of direct magnitude constraint. Consequently, the proposed constraints related to FCSC outperform the conventional constraints addressing complex frequency response errors, since the former yields a wider range of controllable PRE as well as the dramatically reduced constraint scale. Moreover, in order to restrict the sampling inter-symbol interference, the Nyquist Condition (NYQ) is constrained in the frequency domain, which circumvents the initial nonconvex problem. Simulations confirm the effectiveness of the proposed method, where the FCSC can be sufficiently relaxed to improve the stopband attenuation, making this nonlinear-phase design more flexible than previous designs of FBMC prototype filter. Besides, the bit error rate test demonstrates that the designed NLPFFs are superior to the conventional PHYDYAS filter, therefore, the proposed design can certainly produce high quality prototype filter for FBMC system.

  • the nonlinear phase design of fbmc prototype filter based on filter coefficient symmetry characteristic
    Wireless Networks, 2020
    Co-Authors: Yu Zhang, Feng Li, Dongming Wang
    Abstract:

    To promote filter bank multicarrier (FBMC) in future communication, a novel design method of nonlinear phase FIR filter (NLPFF) is proposed under the principle of constrained minimax (CMM), by which the designed filter will act as the FBMC prototype filter. In this method, the filter coefficient symmetry characteristic (FCSC) is exploited in replace of the conventional phase response error (PRE), which simplifies the establishment of phase constraint and benefits the construction of direct magnitude constraint. Consequently, the proposed constraints related to FCSC outperform the conventional constraints addressing complex frequency response errors, since the former yields a wider range of controllable PRE as well as the dramatically reduced constraint scale. Moreover, in order to restrict the sampling inter-symbol interference, the Nyquist Condition (NYQ) is constrained in the frequency domain, which circumvents the initial nonconvex problem. Simulations confirm the effectiveness of the proposed method, where the FCSC can be sufficiently relaxed to improve the stopband attenuation, making this nonlinear-phase design more flexible than previous designs of FBMC prototype filter. Besides, the bit error rate test demonstrates that the designed NLPFFs are superior to the conventional PHYDYAS filter, therefore, the proposed design can certainly produce high quality prototype filter for FBMC system.

  • Design of Waveform Shaping Filter in the UFMC System
    IEEE Access, 2018
    Co-Authors: Jiangang Wen, Yu Zhang, Jingyu Hua, Dongming Wang
    Abstract:

    The universal filtered multi-carrier (UFMC) has been taken as a promising candidate for future wireless communication, where a finite impulse response filter is employed to shape the waveform and enhance its resistance to inter-carrier interference. In previous studies, the Dolph–Chebyshev filter had been used due to its low-sidelobe levels, but at the cost of low flexibility to filter the performance control. Hence, this paper puts forward an effective scheme to design an anti-interference filter for UFMC system, where the Nyquist Condition (or sampling inter-symbol interference equivalently), the in-band distortion, and the out-of-band emission are taken into consideration. First, this paper models the filter design as a constrained minimax optimization concerning above-mentioned filter performance indexes. Then, the original nonconvex constraints on Nyquist Condition are approximately transformed to a linear matrix inequation and two linear inequations. Finally, the optimization problem is solved by semi-definite programming. The numerical examples explicitly demonstrate the flexible performance tradeoff of the proposed method, in which the included filter performance indexes can be effectively controlled. Moreover, the bit-error-rate (BER) tests of the UFMC system confirms the effectiveness of our study, where the designed filters show BER advantages over filters of the previous literature. Therefore, the proposed waveform shaping filters can benefit variant applications of UFMC for its flexible performance tradeoffs as well as the improved anti-interference performance.

  • Design of FBMC waveform by exploiting a NPR prototype filter
    2017 Advances in Wireless and Optical Communications (RTUWO), 2017
    Co-Authors: Feng Li, Dongming Wang, Jiamin Li
    Abstract:

    Filter bank multicarrier (FBMC) has been taken as a candidate modulation for the 5th generation (5G) mobile network, because it exploits well-shaped prototype filters to reduce the inter-symbol-interference (ISI) and inter-carrier-interference (ICI) in OFDM system. To achieve more flexibility in filter performances, this paper designs nearly perfect reconstruction (NPR) filters by relaxing the Nyquist Condition (NYQ), and then, the spectral factorization is employed to extract the final prototype filters. As a result, the proposed prototype filter can outperform the generally used PHYDYAS filter in terms of the frequency selectivity, which leads to better bit-error-rate (BER) result in computer simulations of FBMC.

Zhijiang Xu - One of the best experts on this subject based on the ideXlab platform.

  • optimization of fbmc waveform by designing npr prototype filter with improved stopband suppression
    Mobile Networks and Applications, 2019
    Co-Authors: Anding Wang, Zhijiang Xu, Feng Li
    Abstract:

    FBMC can relax the out-of-band emissions problem in OFDM by using well-designed prototype filter such as the isotropic orthogonal transform algorithm. In order to achieve more flexibility in filter performances as well as to improve FBMC frequency selectivity, this paper puts forward a design method of nearly perfect reconstruction (NPR) prototype filter, in which the Nyquist Condition can be constrained by using the filter autocorrelation coefficients. Then, we can apply the spectral factorization to retrieve the final prototype filter, and the filter results show advantages over conventional ones in terms of sidelobe suppression, especially in the region near the transition band. Such advantages finally result in bit-error-rate (BER) superiority in FBMC simulations, which definitely confirms the effectiveness of the proposed design method for NPR prototype filter.

  • MLICOM (2) - Two-Phase Prototype Filter Design for FBMC Systems
    Machine Learning and Intelligent Communications, 2018
    Co-Authors: Zhijiang Xu, Weidang Lu, Jiamin Li
    Abstract:

    FBMC has been taken as a candidate waveform for the next enhanced 5th generation (5G). To further improve its advantages over OFDM as well as to promote its application in burst transmission, a two-phase method is applied to design its prototype filter, i.e. a square-root Nyquist filter. In this method, the autocorrelation-based technique and a spectral factorization aimed at minimum stopband energy are successively exploited to acquire the final prototype filter. Through the relaxation of Nyquist Condition and benefited from the nonlinear-phase, the frequency selectivity of our designed filters can be greatly improved. Furthermore, the performances of the proposed prototype filter brings a better BER in simulations, which demonstrates the effectiveness of our square-root Nyquist filter design for FBMC systems.

  • two phase prototype filter design for fbmc systems
    International Conference on Machine Learning, 2017
    Co-Authors: Zhijiang Xu, Weidang Lu, Jiamin Li
    Abstract:

    FBMC has been taken as a candidate waveform for the next enhanced 5th generation (5G). To further improve its advantages over OFDM as well as to promote its application in burst transmission, a two-phase method is applied to design its prototype filter, i.e. a square-root Nyquist filter. In this method, the autocorrelation-based technique and a spectral factorization aimed at minimum stopband energy are successively exploited to acquire the final prototype filter. Through the relaxation of Nyquist Condition and benefited from the nonlinear-phase, the frequency selectivity of our designed filters can be greatly improved. Furthermore, the performances of the proposed prototype filter brings a better BER in simulations, which demonstrates the effectiveness of our square-root Nyquist filter design for FBMC systems.

Corinne Mailhes - One of the best experts on this subject based on the ideXlab platform.

Ram Zamir - One of the best experts on this subject based on the ideXlab platform.

  • Sampling versus Random Binning for Multiple Descriptions of a Bandlimited Source
    arXiv: Information Theory, 2013
    Co-Authors: Adam Mashiach, Jan Ostergaard, Ram Zamir
    Abstract:

    Random binning is an efficient, yet complex, coding technique for the symmetric L-description source coding problem. We propose an alternative approach, that uses the quantized samples of a bandlimited source as "descriptions". By the Nyquist Condition, the source can be reconstructed if enough samples are received. We examine a coding scheme that combines sampling and noise-shaped quantization for a scenario in which only K < L descriptions or all L descriptions are received. Some of the received K-sets of descriptions correspond to uniform sampling while others to non-uniform sampling. This scheme achieves the optimum rate-distortion performance for uniform-sampling K-sets, but suffers noise amplification for nonuniform-sampling K-sets. We then show that by increasing the sampling rate and adding a random-binning stage, the optimal operation point is achieved for any K-set.

  • ITW - Sampling versus random binning for multiple descriptions of a bandlimited source
    2013 IEEE Information Theory Workshop (ITW), 2013
    Co-Authors: Adam Mashiach, Jan Ostergaard, Ram Zamir
    Abstract:

    Random binning is an efficient, yet complex, coding technique for the symmetric L-description source coding problem. We propose an alternative approach, that uses the quantized samples of a bandlimited source as “descriptions”. By the Nyquist Condition, the source can be reconstructed if enough samples are received. We examine a coding scheme that combines sampling and noise-shaped quantization for a scenario in which only K