Browsing M Tech Dissertations by Author "Vijaykumar, Chakka"

Now showing items 1-6 of 6

    • Channel estimation and tracking OFDM and MIMO systems 

      Singh, Smriti (Dhirubhai Ambani Institute of Information and Communication Technology, 2009)
      In this thesis, To estimate and track the slow Time varying channels in OFDM and MIMO systems. In first part: we have used a two-dimensional recursive least square adaptive channel estimation technique is used. In orthogonal ...

    • 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 ...

    • Incorporation of mobility model of nodes in zone routing protocol for mobile ad hoc wireless networks 

      Chander, Vipperla Ravi (Dhirubhai Ambani Institute of Information and Communication Technology, 2004)
      Ad Hoc wireless networks are characterized by dynamically changing network topology due to relative motion of the nodes. This leads to the exchange of large number of control packets between the nodes to maintain the network ...

    • Orthogonal frequency division multiplexing synchronization techniques 

      Ravikanth, Sivangi (Dhirubhai Ambani Institute of Information and Communication Technology, 2008)
      Synchronization plays a major role in the design of a digital communication system. Essentially, this function aims at retrieving some reference parameters from the received signal that are necessary for reliable data ...

    • Pulse shaping design for PAPR reduction in OFDM 

      Jain, Akansha (Dhirubhai Ambani Institute of Information and Communication Technology, 2009)
      Future mobile communications systems reaching for ever increasing data rates require higher bandwidths than those typical used in todays cellular systems. By going to higher bandwidth the (for low bandwidth) at fading ...

    • Spectral estimation using WRLS algorithm for multiband detection 

      Bhatia, Atul (Dhirubhai Ambani Institute of Information and Communication Technology, 2008)
      Signal parameter estimation in the presence of noise has been a key area of research. Many applications have benefited from advancements made in this field within the last two decades. The method proposed in the thesis ...