"Xu, Guixian" - Selaus tekijän mukaan TUNICRIS-julkaisut

Viitteet 1-11 / 11

    • Cellular Digital Post-Distortion: Signal Processing Methods and RF Measurements 

      Babaroglu, Huseyin; Anttila, Lauri; Xu, Guixian; Turunen, Matias; Allén, Markus; Valkama, Mikko (2023)
      conference
      In this paper, we study the feasibility of digital post-distortion (DPoD) based mitigation of transmitter nonlinear distortion in cellular networks. With specific emphasis on downlink, we describe a computationally efficient ...

    • Cluster-based flow control in hybrid software-defined wireless sensor networks 

      Liu, Qingzhi; Cheng, Long; Alves, Renan; Ozcelebi, Tanir; Kuipers, Fernando; Xu, Guixian; Lukkien, Johan; Chen, Shanzhi (14.03.2021)
      article
      <p>Software-defined networking (SDN) is a cornerstone of next-generation networks and has already led to numerous advantages for data-center networks and wide-area networks. However, SDN is not widely adopted in ...

    • Digital Polar Transmitters for Massive MIMO: Sum-Rate and Power Efficiency Analysis 

      Xu, Guixian; Lampu, Vesa; Kosunen, Marko; Unnikrishnan, Vishnu; Ryynänen, Jussi; Valkama, Mikko; Anttila, Lauri (01.01.2023)
      article
      <p>In this article, we comprehensively investigate the potential of the digital polar radio transmitter architecture for multi-user massive multiple-input multiple-output orthogonal frequency-division multiplexing ...

    • Digital Post-Distortion for Multi-Layer MIMO-OFDM 

      Babaroglu, Huseyin; Anttila, Lauri; Xu, Guixian; Valkama, Mikko (07 / 2024)
      article
      In this letter, we propose a new digital post-distortion (DPoD) technique for precoded multi-layer orthogonal frequency division multiplexing (OFDM) systems, in order to enhance the received signal error vector magnitude ...

    • Energy-Efficient Array Transmitters Through Outphasing and Over-the-Air Combining 

      Lampu, Vesa; Xu, Guixian; Anttila, Lauri; Brihuega Garcia, Alberto; Kosunen, Marko; Unnikrishnan, Vishnu; Ryynänen, Jussi; Valkama, Mikko
      Asilomar Conference on Signals, Systems, and Computers proceedings (2022)
      conference
      In this paper, a combinerless outphasing architecture for multiantenna transmitters with analog beamforming is presented and analyzed. The outphasing transmitter facilitates the use of highly power efficient switch-mode ...

    • Energy-Efficient Power Allocation and Splitting for MmWave Beamspace MIMO-NOMA with SWIPT 

      Chen, Liangyu; Hu, Bo; Xu, Guixian; Chen, Shanzhi (15.07.2021)
      article
      Non-orthogonal multiple access (NOMA) has recently been employed into millimeter wave (mmWave) beamspace MIMO to further improve connection density and spectrum efficiency for the emerging cellular internet of things (IoT) ...

    • Multilevel Outphasing with Over-the-Air Combining in Large Antenna Arrays 

      Lampu, Vesa; Xu, Guixian; Brihuega Garcia, Alberto; Kosunen, Marko; Unnikrishnan, Vishnu; Ryynänen, Jussi; Fager, Christian; Valkama, Mikko; Anttila, Lauri (12 / 2023)
      article
      This article investigates the feasibility of combinerless multilevel outphasing transmitter as a potential architecture for large millimeter-wave (mmWave) phased arrays. We consider two distinct ways of distributing the ...

    • QoE-Aware Resource Allocation for Non-Orthogonal Multiple Access Enhanced HetNets 

      Chen, Liangyu; Hu, Bo; Chen, Shanzhi; Xu, Jianpeng; Xu, Guixian (2021)
      article
      <p>Non-orthogonal multiple access (NOMA) has drawn significant attention due to its high spectral efficiency. Invoking NOMA in heterogeneous networks (HetNets) can support ubiquitous connectivity and satisfy the ...

    • QoE-driven resource allocation for D2D underlaying NOMA cellular networks 

      Chen, Liangyu; Hu, Bo; Chen, Shanzhi; Xu, Guixian
      IEEE Wireless Communications and Networking Conference, WCNC (2021)
      conference
      <p>Device-to-device (D2D) communication can significantly improve network coverage and spectral efficiency. Meanwhile, non-orthogonal multiple access (NOMA) has recently been integrated with D2D communication to ...

    • Quantized Polar Transmitters for Power Efficient Massive MIMO Systems 

      Xu, Guixian; Lampu, Vesa; Kosunen, Marko; Stadius, Kari; Ryynänen, Jussi; Valkama, Mikko; Anttila, Lauri (2020)
      article
      <p>This letter investigates the feasibility of the quantized digital polar transmitter architecture in a downlink multi-user massive multiple-input multiple-output orthogonal frequency-division multiplexing (MIMO-OFDM) ...

    • Reconfigurable Signal Processing and DSP Hardware Generator for 5G Transmitters 

      Ghosh, Agnimesh; Spelman, Andrei; Cheung, Tze Hin; Boopathy, Dhanashree; Unnikrishnan, Vishnu; Lampu, Vesa; Xu, Guixian; Anttila, Lauri; Stadius, Kari; Kosunen, Marko; Ryynänen, Jussi
      2022 IEEE Nordic Circuits and Systems Conference, NORCAS 2022 - Proceedings (2022)
      conference
      <p>To impose the reconfigurability and reusability of digital circuits for millimeterwave transmitter architectures, high-speed digital signal processing architectures are explored. The digital front-end of these ...