The Experts below are selected from a list of 64731 Experts worldwide ranked by ideXlab platform

Gerd Ascheid - One of the best experts on this subject based on the ideXlab platform.

  • ICNC - VLSI Architectures for ORVD Trellis based MIMO Detection
    2019 International Conference on Computing Networking and Communications (ICNC), 2019
    Co-Authors: Sebastian Birke, Dominik Auras, Rainer Leupers, Tobias Piwczyk, Robin Mahlke, Nikolas Alberti, Gerd Ascheid
    Abstract:

    A novel architecture structuring MIMO Detection with a Trellis search is presented. Therefore, several optimizations are explored reducing complexity and increasing efficiency. Implementing orthogonal real-value decomposition outperforms the basic implementation by a factor of 2.7 in terms of area throughput efficiency, preserving a comparable communication performance. This concept also allows suitable scaling towards higher modulation orders and also offers a potential for further architectural scaling. optimizations are applied on algorithmic and architectural level to reduce complexity and increase efficiency. A design space exploration of the sorting subtask is also presented. It achieves the IEEE 802.11n standard’s Peak Data Rate, even for two detector decoder iterations (2 × 720 Mbit=s).

  • ISVLSI - A Novel Class of Linear MIMO Detectors with Boosted Communications Performance: Algorithm and VLSI Architecture
    2014 IEEE Computer Society Annual Symposium on VLSI, 2014
    Co-Authors: Dominik Auras, Rainer Leupers, Gerd Ascheid
    Abstract:

    This paper introduces a novel class of linear soft-input soft-output detectors with boosted communications performance. The detector showed an SNR gain of up to 2.4 dB compared to state-of-the-art linear detectors. We introduce a low-complexity algorithm tailored for VLSI implementation, and propose a suitable architecture. The developed ASIC demonstRates the feasibility and efficiency of the concept, achieving the IEEE 802.11n standard's Peak Data Rate of 600 Mbit/s.

  • ICC - A novel reduced-complexity soft-input soft-output MMSE MIMO detector: Algorithm and efficient VLSI architecture
    2014 IEEE International Conference on Communications (ICC), 2014
    Co-Authors: Dominik Auras, Rainer Leupers, Gerd Ascheid
    Abstract:

    A novel reduced-complexity soft-input soft-output minimum mean square error detection algorithm for MIMO systems together with an area-throughput efficient VLSI architecture is described. A detailed comparison to related work is presented. The proposed VLSI architecture of the novel algorithm represents - to the best of our knowledge - the most area-throughput efficient SISO MIMO detector ASIC reported so far, being 2.3x more efficient than its best competitor. It achieves a throughput of up to 923 Mbit/s and occupies down to half of the competitor's area while sustaining the IEEE 802.11n standard's Peak Data Rate.

  • ISCAS - Efficient VLSI architectures for matrix inversion in soft-input soft-output MMSE MIMO detectors
    2014 IEEE International Symposium on Circuits and Systems (ISCAS), 2014
    Co-Authors: Dominik Auras, Rainer Leupers, Gerd Ascheid
    Abstract:

    A computational complexity analysis of matrix inversion used in soft-input soft-output minimum mean square error (MMSE) MIMO detectors and a comprehensive literature comparison of corresponding VLSI implementations are presented. They indicate that the application specific integRated circuit (ASIC) proposed in this paper is — to the best of our knowledge — the most area-throughput efficient VLSI architecture reported so far, outperforming the second best by a factor of 1.7x. The ASIC achieves the IEEE 802.11n standard’s Peak Data Rate of 600 Mbit/s.

  • ACM Great Lakes Symposium on VLSI - VLSI implementation of linear MIMO detection with boosted communications performance: extended abstract
    Proceedings of the 24th edition of the great lakes symposium on VLSI - GLSVLSI '14, 2014
    Co-Authors: Dominik Auras, Dominik Rieth, Rainer Leupers, Gerd Ascheid
    Abstract:

    A novel class of linear soft-input soft-output detectors featuring boosted communications performance is introduced. Compared to state-of-the-art linear detectors, the detector has an SNR gain of up to 2.4 dB. We shortly summarize the algorithm, and sketch a suitable architecture. The corresponding ASIC implementation shows the feasibility and efficiency of the concept. It achieves the IEEE 802.11n standard's Peak Data Rate of 600 Mbit/s.

Michele Zorzi - One of the best experts on this subject based on the ideXlab platform.

  • Achieving Ultra-Low Latency in 5G Millimeter Wave Cellular Networks
    IEEE Communications Magazine, 2017
    Co-Authors: Russell Ford, Sourjya Dutta, Sylvie Rangan, Menglei Zhang, Marco Mezzavilla, Michele Zorzi
    Abstract:

    The IMT 2020 requirements of 20 Gb/s Peak Data Rate and 1 ms latency present significant engineering challenges for the design of 5G cellular systems. Systems that make use of the mmWave bands above 10 GHz -where large regions of spectrum are available -are a promising 5G candidate that may be able to rise to the occasion. However, although the mmWave bands can support massive Peak Data Rates, delivering these Data Rates for end-to-end services while maintaining reliability and ultra-low-latency performance to support emerging applications and use cases will require rethinking all layers of the protocol stack. This article surveys some of the challenges and possible solutions for delivering end-to-end, reliable, ultra-low-latency services in mmWave cellular systems in terms of the MAC layer, congestion control, and core network architecture.

  • Achieving Ultra-Low Latency in 5G Millimeter Wave Cellular Networks
    arXiv: Networking and Internet Architecture, 2016
    Co-Authors: Russell Ford, Sourjya Dutta, Sylvie Rangan, Menglei Zhang, Marco Mezzavilla, Michele Zorzi
    Abstract:

    The IMT 2020 requirements of 20 Gbps Peak Data Rate and 1 millisecond latency present significant engineering challenges for the design of 5G cellular systems. Use of the millimeter wave (mmWave) bands above 10 GHz --- where vast quantities of spectrum are available --- is a promising 5G candidate that may be able to rise to the occasion. However, while the mmWave bands can support massive Peak Data Rates, delivering these Data Rates on end-to-end service while maintaining reliability and ultra-low latency performance will require rethinking all layers of the protocol stack. This papers surveys some of the challenges and possible solutions for delivering end-to-end, reliable, ultra-low latency services in mmWave cellular systems in terms of the Medium Access Control (MAC) layer, congestion control and core network architecture.

Dominik Auras - One of the best experts on this subject based on the ideXlab platform.

  • ICNC - VLSI Architectures for ORVD Trellis based MIMO Detection
    2019 International Conference on Computing Networking and Communications (ICNC), 2019
    Co-Authors: Sebastian Birke, Dominik Auras, Rainer Leupers, Tobias Piwczyk, Robin Mahlke, Nikolas Alberti, Gerd Ascheid
    Abstract:

    A novel architecture structuring MIMO Detection with a Trellis search is presented. Therefore, several optimizations are explored reducing complexity and increasing efficiency. Implementing orthogonal real-value decomposition outperforms the basic implementation by a factor of 2.7 in terms of area throughput efficiency, preserving a comparable communication performance. This concept also allows suitable scaling towards higher modulation orders and also offers a potential for further architectural scaling. optimizations are applied on algorithmic and architectural level to reduce complexity and increase efficiency. A design space exploration of the sorting subtask is also presented. It achieves the IEEE 802.11n standard’s Peak Data Rate, even for two detector decoder iterations (2 × 720 Mbit=s).

  • ISVLSI - A Novel Class of Linear MIMO Detectors with Boosted Communications Performance: Algorithm and VLSI Architecture
    2014 IEEE Computer Society Annual Symposium on VLSI, 2014
    Co-Authors: Dominik Auras, Rainer Leupers, Gerd Ascheid
    Abstract:

    This paper introduces a novel class of linear soft-input soft-output detectors with boosted communications performance. The detector showed an SNR gain of up to 2.4 dB compared to state-of-the-art linear detectors. We introduce a low-complexity algorithm tailored for VLSI implementation, and propose a suitable architecture. The developed ASIC demonstRates the feasibility and efficiency of the concept, achieving the IEEE 802.11n standard's Peak Data Rate of 600 Mbit/s.

  • ICC - A novel reduced-complexity soft-input soft-output MMSE MIMO detector: Algorithm and efficient VLSI architecture
    2014 IEEE International Conference on Communications (ICC), 2014
    Co-Authors: Dominik Auras, Rainer Leupers, Gerd Ascheid
    Abstract:

    A novel reduced-complexity soft-input soft-output minimum mean square error detection algorithm for MIMO systems together with an area-throughput efficient VLSI architecture is described. A detailed comparison to related work is presented. The proposed VLSI architecture of the novel algorithm represents - to the best of our knowledge - the most area-throughput efficient SISO MIMO detector ASIC reported so far, being 2.3x more efficient than its best competitor. It achieves a throughput of up to 923 Mbit/s and occupies down to half of the competitor's area while sustaining the IEEE 802.11n standard's Peak Data Rate.

  • ISCAS - Efficient VLSI architectures for matrix inversion in soft-input soft-output MMSE MIMO detectors
    2014 IEEE International Symposium on Circuits and Systems (ISCAS), 2014
    Co-Authors: Dominik Auras, Rainer Leupers, Gerd Ascheid
    Abstract:

    A computational complexity analysis of matrix inversion used in soft-input soft-output minimum mean square error (MMSE) MIMO detectors and a comprehensive literature comparison of corresponding VLSI implementations are presented. They indicate that the application specific integRated circuit (ASIC) proposed in this paper is — to the best of our knowledge — the most area-throughput efficient VLSI architecture reported so far, outperforming the second best by a factor of 1.7x. The ASIC achieves the IEEE 802.11n standard’s Peak Data Rate of 600 Mbit/s.

  • ACM Great Lakes Symposium on VLSI - VLSI implementation of linear MIMO detection with boosted communications performance: extended abstract
    Proceedings of the 24th edition of the great lakes symposium on VLSI - GLSVLSI '14, 2014
    Co-Authors: Dominik Auras, Dominik Rieth, Rainer Leupers, Gerd Ascheid
    Abstract:

    A novel class of linear soft-input soft-output detectors featuring boosted communications performance is introduced. Compared to state-of-the-art linear detectors, the detector has an SNR gain of up to 2.4 dB. We shortly summarize the algorithm, and sketch a suitable architecture. The corresponding ASIC implementation shows the feasibility and efficiency of the concept. It achieves the IEEE 802.11n standard's Peak Data Rate of 600 Mbit/s.

Quiting Huang - One of the best experts on this subject based on the ideXlab platform.

  • design and implementation of a parallel turbo decoder asic for 3gpp lte
    IEEE Journal of Solid-state Circuits, 2011
    Co-Authors: Christoph Studer, Sandro Belfanti, Christian Benkeser, Quiting Huang
    Abstract:

    Turbo-decoding for the 3GPP-LTE (Long Term Evolution) wireless communication standard is among the most challenging tasks in terms of computational complexity and power consumption of corresponding cellular devices. This paper addresses design and implementation aspects of parallel turbo-decoders that reach the 326.4 Mb/s LTE Peak Data-Rate using multiple soft-input soft-output decoders that opeRate in parallel. To highlight the effectiveness of our design-approach, we realized a 3.57 mm2 radix-4based 8× parallel turbo-decoder ASIC in 0.13 μm CMOS technology achieving 390 Mb/s. At the more realistic 100 Mb/s LTE milestone targeted by industry today, the turbo-decoder consumes only 69 mW.

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

  • A UE-grouping based load balancing scheme for Carrier Aggregation in LTE-advanced systems
    2013 8th International Conference on Communications and Networking in China (CHINACOM), 2013
    Co-Authors: Yun Lin, Wenbo Wang
    Abstract:

    By aggregating Component Carriers (CCs) to enlarge the transmission bandwidth, Carrier Aggregation (CA) greatly improves the Peak Data Rate for Long Term Evolution-Advanced (LTE-Advanced) system. However, more than one carrier scheduling in a system results in the problem of load imbalance among carriers. This paper presents a UE-grouping based load balancing (UGLB) scheme for CC scheduling in which both the load and channel quality conditions of CC are taken into account and different condition settings are provided to different UE groups. The proposed scheme not only properly balances the load among CCs but also achieves high throughput. Through simulation the performance of UGLB scheme is verified.

  • control channel design for carrier aggregation between lte fdd and lte tdd systems
    Vehicular Technology Conference, 2012
    Co-Authors: Yong Li, Lan Chen, Qin Mu, Mugen Peng, Wenbo Wang
    Abstract:

    Carrier aggregation (CA) has been proposed within 3GPP to aggregate multiple component carriers (CCs) in LTE-Advanced system to achieve higher Peak Data Rate. In this paper, we propose CA between FDD and TDD carriers in order to utilize FDD and TDD spectrums more efficiently. By comparing the differences in control channel between LTE FDD and TDD specifications, three problems in the case of CA between FDD and TDD carriers are identified, and we then propose the respective solutions and analyze their pros and cons. It is shown that CA between FDD and TDD carriers can provide system flexibility and performance benefits for the operators which own both FDD and TDD spectrums.

  • VTC Spring - Control Channel Design for Carrier Aggregation between LTE FDD and LTE TDD Systems
    2012 IEEE 75th Vehicular Technology Conference (VTC Spring), 2012
    Co-Authors: Liu Liu, Lan Chen, Mugen Peng, Wenbo Wang
    Abstract:

    Carrier aggregation (CA) has been proposed within 3GPP to aggregate multiple component carriers (CCs) in LTE-Advanced system to achieve higher Peak Data Rate. In this paper, we propose CA between FDD and TDD carriers in order to utilize FDD and TDD spectrums more efficiently. By comparing the differences in control channel between LTE FDD and TDD specifications, three problems in the case of CA between FDD and TDD carriers are identified, and we then propose the respective solutions and analyze their pros and cons. It is shown that CA between FDD and TDD carriers can provide system flexibility and performance benefits for the operators which own both FDD and TDD spectrums.

  • carrier aggregation for lte advanced mobile communication systems
    IEEE Communications Magazine, 2010
    Co-Authors: Guangxiang Yuan, Wenbo Wang, Xiang Zhang, Yang Yang
    Abstract:

    In order to achieve up to 1 Gb/s Peak Data Rate in future IMT-Advanced mobile systems, carrier aggregation technology is introduced by the 3GPP to support very-high-Data-Rate transmissions over wide frequency bandwidths (e.g., up to 100 MHz) in its new LTE-Advanced standards. This article first gives a brief review of continuous and non-continuous CA techniques, followed by two Data aggregation schemes in physical and medium access control layers. Some technical challenges for implementing CA technique in LTE-Advanced systems, with the requirements of backward compatibility to LTE systems, are highlighted and discussed. Possible technical solutions for the asymmetric CA problem, control signaling design, handover control, and guard band setting are reviewed. Simulation results show Doppler frequency shift has only limited impact on Data transmission performance over wide frequency bands in a high-speed mobile environment when the component carriers are time synchronized. The frequency aliasing will geneRate much more interference between adjacent component carriers and therefore greatly degrades the bit error Rate performance of downlink Data transmissions.

  • carrier aggregation for lte advanced mobile communication systems
    IEEE Communications Magazine, 2010
    Co-Authors: Guangxiang Yuan, Wenbo Wang, Xiang Zhang, Yang Yang
    Abstract:

    In order to achieve up to 1 Gb/s Peak Data Rate in future IMT-Advanced mobile systems, carrier aggregation technology is introduced by the 3GPP to support very-high-Data-Rate transmissions over wide frequency bandwidths (e.g., up to 100 MHz) in its new LTE-Advanced standards. This article first gives a brief review of continuous and non-continuous CA techniques, followed by two Data aggregation schemes in physical and medium access control layers. Some technical challenges for implementing CA technique in LTE-Advanced systems, with the requirements of backward compatibility to LTE systems, are highlighted and discussed. Possible technical solutions for the asymmetric CA problem, control signaling design, handover control, and guard band setting are reviewed. Simulation results show Doppler frequency shift has only limited impact on Data transmission performance over wide frequency bands in a high-speed mobile environment when the component carriers are time synchronized. The frequency aliasing will geneRate much more interference between adjacent component carriers and therefore greatly degrades the bit error Rate performance of downlink Data transmissions.