Browsing by Subject "OFDM"

Now showing items 1-8 of 8

    • Adaptive channel estimation and loading for OFDM based two-way relay systems 

      Joy, Arun (Dhirubhai Ambani Institute of Information and Communication Technology, 2013)
      In this thesis we introduce a low complexity Recursive Least Square (RLS) based Orthogonal Frequency Division Multiplexing (OFDM) channel estimation for two-way relay system. Using the estimate of the channel, a bit and ...

    • Digital implementation of orthogonal frequency division multiplexing 

      Bhanushali, Artiben (Dhirubhai Ambani Institute of Information and Communication Technology, 2017)
      "OFDM (Orthogonal Frequency Division Multiplexing) is the most important part of 4G and 5G technology which is adopted by many standards because of its various advantages. In this thesis, firstly prototype of OFDM system ...

    • Enhancing data efficiency in OFDM (IEEE 802.11a) using equalization (11A) 

      Reddy, S. Gangadhar (Dhirubhai Ambani Institute of Information and Communication Technology, 2005)
      IEEE 802.11a OFDM signal passed through a dispersive channel introduces ISI & ICI. To avoid ISI & ICI, cyclic prefix (guard interval) is introduced between the OFDM symbols. But the cyclic prefix contributes about 20% ...

    • Frequency offset estimation in OFDM signals using particle filtering along with resampling methods 

      Jayanthi, V. Ravisankar (Dhirubhai Ambani Institute of Information and Communication Technology, 2008)
      Frequency offset is one of the main effects the Bit Error Rate(BER) in orthogonal frequency division multiplexing (OFDM). There are many applications which depend on OFDM. The present method describes the estimation of ...

    • Model based channel shortening technique for IEEE 802.11a OFDM system 

      Patidar, Pravin (Dhirubhai Ambani Institute of Information and Communication Technology, 2007)
      Channel shortening tehniques for IEEE802.11a OFDM system are studied. Their performance is evaluated for various standard channel models. A model based channel shortening technique is presented, which reduces the computational ...

    • Multirate signal processing in digital communications 

      Arya, Krishna Kumari (Dhirubhai Ambani Institute of Information and Communication Technology, 2008)
      Fundamentals of multirate signal processing and perfect reconstruction filter banks are revisited. An attempt is made to develop a good understanding of concepts by connecting the filter bank design issues to the concepts ...

    • Performance evaluation of OFDM technique for high speed communication applications 

      Kabra, Mukul (Dhirubhai Ambani Institute of Information and Communication Technology, 2005)
      The Internet revolution has created the need for wireless technologies that can deliver data at high speeds in a spectrally efficient manner. However, supporting such high data rates with sufficient robustness to radio ...

    • Security Enhancement using Channel State Information for Multicarrier Modulation 

      Sindhav, Nidhi K. (2021)
      Wireless technologies of the fifth generation (5G) are vital to advancing Internet-of- Things (IoT) networks in the future. Information security in wireless networks is one of the most difficult problems due to the open ...