Browsing by Subject "OFDM"

Now showing items 1-6 of 6

    • Exploiting spatial diversity in overloaded MIMO LDS-OFDM multiple access systems 
      Da Silva, Bruno Fontana; Azurdia Meza, César; Silva, Danilo; Uchôa-Filho, Bartolomeu F. (IEEE, 2017)
      In this paper, we consider the deployment of multiple antennas as a way to exploit spatial diversity in the uplink of multiple access systems that adopt low-density spreading (LDS) with orthogonal frequency-division ...
    • ICI Reduction in OFDM Systems Using a New Family of Nyquist-I Pulses 
      Arraño, Hernán; Azurdia Meza, César (IEEE, 2015)
      In this paper the parametric linear combination pulse (IPLCP) is proposed. The IPLCP is a new family of Nyquist-I pulses with two additional degrees of freedom to minimize the inter-carrier interference (ICI) power in ...
    • Improved dual sinc pulses to reduce ICI power and PAPR in OFDM-based systems 
      Kamal, Shaharyar; Kang, Hojin; Azurdia Meza, César A.; Kim, Dong Seong (Ksii-Kor Soc Internet Informationkor SCI & Technol CTR, 2020)
      A newfangled family of Nyquist-I pulses is proposed and named improved dual sinc pulse (IDSP). The IDSP is designed to improve performance in orthogonal frequency division multiplexing (OFDM)-based systems. The IDSP is ...
    • Improved Nyquist-I Pulses to Enhance the Performance of OFDM-Based Systems 
      Kamal, Shaharyar; Azurdia Meza, César; Lee, Kyesan (Springer, 2017)
      Pulse shaping is used in orthogonal frequency division multiplexing (OFDM) based systems to reduce inter-carrier interference (ICI) power and peak-to-average power ratio (PAPR), which are considered the major weaknesses ...
    • Novel multilayer extreme learning machine as a massive MIMO receiver for millimeter wave communications 
      Carrera, Diego Fernando; Vagas Rosales, César; Zabala Blanco, David; Yungaicela Naula, Noe M; Azurdia Meza, César Augusto; Mohamed, Marey; Ali Dehghan, Firoozabadi (IEEE, 2022)
      Wireless communication systems working in millimeter-wave (mmWave) frequency bands offer higher bandwidths than traditional radio frequency schemes. This technology allows multibeam steering and data multiplexing with the ...
    • Subsiding OOB Emission and ICI Power Using iPOWER Pulse in OFDM Systems 
      Kamal, Shaharyar; Azurdia Meza, César; Lee, Kyesan (Univ Suceava, Fac Electrical Eng, 2016)
      A novel family of Nyquist-I pulses called iPOWER is proposed with a new design parameter. that provides an extra degree of freedom for a certain roll-off factor, a. The proposed pulse is examined and compared with other ...