The Experts below are selected from a list of 147 Experts worldwide ranked by ideXlab platform
Robert W Heath - One of the best experts on this subject based on the ideXlab platform.
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double Sequence frequency Synchronization for wideband millimeter wave systems with few bit adcs
IEEE Transactions on Wireless Communications, 2020Co-Authors: Dalin Zhu, Ralf Bendlin, Salam Akoum, Arunabha Ghosh, Robert W HeathAbstract:In this paper, we propose and evaluate a novel double-Sequence low-resolution frequency Synchronization method in millimeter-wave (mmWave) systems. In our system model, the base station uses analog beams to send the Synchronization signal with infinite-resolution digital-to-analog converters. The user equipment employs a fully digital front end to detect the Synchronization signal with low-resolution analog-to-digital converters (ADCs). The key ingredient of the proposed method is the custom designed Synchronization Sequence pairs, from which there exists an invertible function (a ratio metric) of the carrier frequency offset (CFO) to be estimated. We use numerical examples to show that the ratio metric is robust to the quantization distortion. To implement our proposed method in practice, we propose to optimize the double-Sequence design parameters such that: (i) for each individual user, the impact of the quantization distortion on the CFO estimation accuracy is minimized, and (ii) the resulting frequency range of estimation can capture as many users’ CFOs as possible. Numerical results reveal that our proposed algorithm can provide a flexible means to estimate CFO in a variety of low-resolution settings.
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double Sequence frequency Synchronization for wideband millimeter wave systems with few bit adcs
arXiv: Signal Processing, 2018Co-Authors: Dalin Zhu, Ralf Bendlin, Salam Akoum, Arunabha Ghosh, Robert W HeathAbstract:In this paper, we propose and evaluate two novel double-Sequence low-resolution frequency Synchronization methods in millimeter-wave (mmWave) systems. In our system model, the base station uses analog beams to send the Synchronization signal with infinite-resolution digital-to-analog converters. The user equipment employs a fully digital front end to detect the Synchronization signal with low-resolution analog-to-digital converters (ADCs). The key ingredient of the proposed methods is the custom designed Synchronization Sequence pairs, from which there exists an invertible function (a ratio metric) of the carrier frequency offset (CFO) to be estimated. We use numerical examples to show that the ratio metric is robust to the quantization distortion. Further, we analytically characterize the CFO estimation performances of our proposed designs assuming a single user. To implement our proposed methods in a multi-user scenario, we propose to optimize the double-Sequence design parameters such that: (i) for each individual user, the impact of the quantization distortion on the CFO estimation accuracy is minimized, and (ii) the resulting frequency range of estimation can capture as many users' CFOs as possible. Numerical results reveal that our proposed algorithms provide a flexible means to estimate CFO in a variety of low-resolution settings.
Dalin Zhu - One of the best experts on this subject based on the ideXlab platform.
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double Sequence frequency Synchronization for wideband millimeter wave systems with few bit adcs
IEEE Transactions on Wireless Communications, 2020Co-Authors: Dalin Zhu, Ralf Bendlin, Salam Akoum, Arunabha Ghosh, Robert W HeathAbstract:In this paper, we propose and evaluate a novel double-Sequence low-resolution frequency Synchronization method in millimeter-wave (mmWave) systems. In our system model, the base station uses analog beams to send the Synchronization signal with infinite-resolution digital-to-analog converters. The user equipment employs a fully digital front end to detect the Synchronization signal with low-resolution analog-to-digital converters (ADCs). The key ingredient of the proposed method is the custom designed Synchronization Sequence pairs, from which there exists an invertible function (a ratio metric) of the carrier frequency offset (CFO) to be estimated. We use numerical examples to show that the ratio metric is robust to the quantization distortion. To implement our proposed method in practice, we propose to optimize the double-Sequence design parameters such that: (i) for each individual user, the impact of the quantization distortion on the CFO estimation accuracy is minimized, and (ii) the resulting frequency range of estimation can capture as many users’ CFOs as possible. Numerical results reveal that our proposed algorithm can provide a flexible means to estimate CFO in a variety of low-resolution settings.
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double Sequence frequency Synchronization for wideband millimeter wave systems with few bit adcs
arXiv: Signal Processing, 2018Co-Authors: Dalin Zhu, Ralf Bendlin, Salam Akoum, Arunabha Ghosh, Robert W HeathAbstract:In this paper, we propose and evaluate two novel double-Sequence low-resolution frequency Synchronization methods in millimeter-wave (mmWave) systems. In our system model, the base station uses analog beams to send the Synchronization signal with infinite-resolution digital-to-analog converters. The user equipment employs a fully digital front end to detect the Synchronization signal with low-resolution analog-to-digital converters (ADCs). The key ingredient of the proposed methods is the custom designed Synchronization Sequence pairs, from which there exists an invertible function (a ratio metric) of the carrier frequency offset (CFO) to be estimated. We use numerical examples to show that the ratio metric is robust to the quantization distortion. Further, we analytically characterize the CFO estimation performances of our proposed designs assuming a single user. To implement our proposed methods in a multi-user scenario, we propose to optimize the double-Sequence design parameters such that: (i) for each individual user, the impact of the quantization distortion on the CFO estimation accuracy is minimized, and (ii) the resulting frequency range of estimation can capture as many users' CFOs as possible. Numerical results reveal that our proposed algorithms provide a flexible means to estimate CFO in a variety of low-resolution settings.
Daesik Hong - One of the best experts on this subject based on the ideXlab platform.
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Synchronization Sequence design for fbmc oqam systems
IEEE Transactions on Wireless Communications, 2016Co-Authors: Wonsuk Chung, Chanhong Kim, Sooyong Choi, Daesik HongAbstract:In this paper, we propose a new Sequence generation methodology to make a constant amplitude zero autocorrelation (CAZAC) preamble available in offset Quadrature Amplitude Modulation-based filter bank multicarrier (FBMC) Synchronization. The role of the new Sequence is to compensate the filtering and symbol overlap of the FBMC structure so as to finally be able to make a CAZAC preamble in time domain. To derive the new Sequence, we formulate a symbol overlap model that shows the relation between the new Sequence and a CAZAC preamble. On the other hand, the offset modulation format is a constraint that needs to be considered in the design of the new Sequence. By using a property of this offset modulation constraint, we derive a closed-form expression of the new Sequence from the symbol overlap model. In addition, we extend an advanced model to create a pseudo-CAZAC preamble that is not data-dependent, thus enabling convenience of implementation. Simulation results show the superiority of the proposed model with respect to Synchronization accuracy, out-of-band radiation, and peak to average power ratio. Moreover, we verify that the proposed model is well-suited for use in the cellular environment through complexity and resource efficiency comparisons.
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Synchronization Sequence Design for FBMC/OQAM Systems
IEEE Transactions on Wireless Communications, 2016Co-Authors: Wonsuk Chung, Chanhong Kim, Sooyong Choi, Daesik HongAbstract:In this paper, we propose a new Sequence generation methodology to make a constant amplitude zero autocorrelation (CAZAC) preamble available in offset Quadrature Amplitude Modulation-based filter bank multicarrier (FBMC) Synchronization. The role of the new Sequence is to compensate the filtering and symbol overlap of the FBMC structure so as to finally be able to make a CAZAC preamble in time domain. To derive the new Sequence, we formulate a symbol overlap model that shows the relation between the new Sequence and a CAZAC preamble. On the other hand, the offset modulation format is a constraint that needs to be considered in the design of the new Sequence. By using a property of this offset modulation constraint, we derive a closed-form expression of the new Sequence from the symbol overlap model. In addition, we extend an advanced model to create a pseudo-CAZAC preamble that is not data-dependent, thus enabling convenience of implementation. Simulation results show the superiority of the proposed model with respect to Synchronization accuracy, out-of-band radiation, and peak to average power ratio. Moreover, we verify that the proposed model is well-suited for use in the cellular environment through complexity and resource efficiency comparisons.
Arunabha Ghosh - One of the best experts on this subject based on the ideXlab platform.
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double Sequence frequency Synchronization for wideband millimeter wave systems with few bit adcs
IEEE Transactions on Wireless Communications, 2020Co-Authors: Dalin Zhu, Ralf Bendlin, Salam Akoum, Arunabha Ghosh, Robert W HeathAbstract:In this paper, we propose and evaluate a novel double-Sequence low-resolution frequency Synchronization method in millimeter-wave (mmWave) systems. In our system model, the base station uses analog beams to send the Synchronization signal with infinite-resolution digital-to-analog converters. The user equipment employs a fully digital front end to detect the Synchronization signal with low-resolution analog-to-digital converters (ADCs). The key ingredient of the proposed method is the custom designed Synchronization Sequence pairs, from which there exists an invertible function (a ratio metric) of the carrier frequency offset (CFO) to be estimated. We use numerical examples to show that the ratio metric is robust to the quantization distortion. To implement our proposed method in practice, we propose to optimize the double-Sequence design parameters such that: (i) for each individual user, the impact of the quantization distortion on the CFO estimation accuracy is minimized, and (ii) the resulting frequency range of estimation can capture as many users’ CFOs as possible. Numerical results reveal that our proposed algorithm can provide a flexible means to estimate CFO in a variety of low-resolution settings.
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double Sequence frequency Synchronization for wideband millimeter wave systems with few bit adcs
arXiv: Signal Processing, 2018Co-Authors: Dalin Zhu, Ralf Bendlin, Salam Akoum, Arunabha Ghosh, Robert W HeathAbstract:In this paper, we propose and evaluate two novel double-Sequence low-resolution frequency Synchronization methods in millimeter-wave (mmWave) systems. In our system model, the base station uses analog beams to send the Synchronization signal with infinite-resolution digital-to-analog converters. The user equipment employs a fully digital front end to detect the Synchronization signal with low-resolution analog-to-digital converters (ADCs). The key ingredient of the proposed methods is the custom designed Synchronization Sequence pairs, from which there exists an invertible function (a ratio metric) of the carrier frequency offset (CFO) to be estimated. We use numerical examples to show that the ratio metric is robust to the quantization distortion. Further, we analytically characterize the CFO estimation performances of our proposed designs assuming a single user. To implement our proposed methods in a multi-user scenario, we propose to optimize the double-Sequence design parameters such that: (i) for each individual user, the impact of the quantization distortion on the CFO estimation accuracy is minimized, and (ii) the resulting frequency range of estimation can capture as many users' CFOs as possible. Numerical results reveal that our proposed algorithms provide a flexible means to estimate CFO in a variety of low-resolution settings.
Salam Akoum - One of the best experts on this subject based on the ideXlab platform.
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double Sequence frequency Synchronization for wideband millimeter wave systems with few bit adcs
IEEE Transactions on Wireless Communications, 2020Co-Authors: Dalin Zhu, Ralf Bendlin, Salam Akoum, Arunabha Ghosh, Robert W HeathAbstract:In this paper, we propose and evaluate a novel double-Sequence low-resolution frequency Synchronization method in millimeter-wave (mmWave) systems. In our system model, the base station uses analog beams to send the Synchronization signal with infinite-resolution digital-to-analog converters. The user equipment employs a fully digital front end to detect the Synchronization signal with low-resolution analog-to-digital converters (ADCs). The key ingredient of the proposed method is the custom designed Synchronization Sequence pairs, from which there exists an invertible function (a ratio metric) of the carrier frequency offset (CFO) to be estimated. We use numerical examples to show that the ratio metric is robust to the quantization distortion. To implement our proposed method in practice, we propose to optimize the double-Sequence design parameters such that: (i) for each individual user, the impact of the quantization distortion on the CFO estimation accuracy is minimized, and (ii) the resulting frequency range of estimation can capture as many users’ CFOs as possible. Numerical results reveal that our proposed algorithm can provide a flexible means to estimate CFO in a variety of low-resolution settings.
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double Sequence frequency Synchronization for wideband millimeter wave systems with few bit adcs
arXiv: Signal Processing, 2018Co-Authors: Dalin Zhu, Ralf Bendlin, Salam Akoum, Arunabha Ghosh, Robert W HeathAbstract:In this paper, we propose and evaluate two novel double-Sequence low-resolution frequency Synchronization methods in millimeter-wave (mmWave) systems. In our system model, the base station uses analog beams to send the Synchronization signal with infinite-resolution digital-to-analog converters. The user equipment employs a fully digital front end to detect the Synchronization signal with low-resolution analog-to-digital converters (ADCs). The key ingredient of the proposed methods is the custom designed Synchronization Sequence pairs, from which there exists an invertible function (a ratio metric) of the carrier frequency offset (CFO) to be estimated. We use numerical examples to show that the ratio metric is robust to the quantization distortion. Further, we analytically characterize the CFO estimation performances of our proposed designs assuming a single user. To implement our proposed methods in a multi-user scenario, we propose to optimize the double-Sequence design parameters such that: (i) for each individual user, the impact of the quantization distortion on the CFO estimation accuracy is minimized, and (ii) the resulting frequency range of estimation can capture as many users' CFOs as possible. Numerical results reveal that our proposed algorithms provide a flexible means to estimate CFO in a variety of low-resolution settings.
