Browsing Theses and dissertations by Author "Vasavada, Yash"

Now showing items 1-13 of 13

    • Applications of deep-learning at digital communication receiver 

      Nanavati, Tilak Digantkumar (Dhirubhai Ambani Institute of Information and Communication Technology, 2020)
      Modulation and demodulation are fundamental modules for communication systems. The modulation techniques — Offset QPSK (OQPSK), p/2 BPSK, p/4 QPSK and GMSK — are frequently applied in the power-constrained wireless ...

    • Beamforming for mitigation of interference for different antenna array geometry 

      Kumari, Komal (2021)
      DOA estimation and Beamforming is one of the most crucial requirements of the Communication system design of RADAR, Satellite communication, Wireless communication. This Estimation performance differs for different ...

    • Beamforming using learning based algorithms 

      Parekh, Naitik (2020)
      With an increasing number of subscribers to the terrestrial cellular satellite-based services, there is a resultant rise in the demand for the data rate, and there is a growing need for advanced antenna and signal processing ...

    • Channel Estimation for Orthogonal Time Frequency Space Modulation using Recursive Least Squares 

      Singh, Bhavesh Amar (2021)
      For its capacity to provide high data rates to a wide number of users, 4G wireless communications had a huge success in the previous decade. With the Internet of Things (IoT) and high mobility scenarios such as vehicle-to-vehicle ...

    • Comparison and analysis of channel coding schemes for 5G mobile communication 

      Gupta, Naimishi (Dhirubhai Ambani Institute of Information and Communication Technology, 2020)
      This thesis aims to do a Detailed investigation of the performance of Convolutional, Turbo, Low-Density Parity-Check (LDPC), and Polar codes which are the high-performance channel coding schemes for 5G mobile communication. ...

    • Compressive sampling architecture for wideband communication 

      Prakash, Chandra (Dhirubhai Ambani Institute of Information and Communication Technology, 2020)
      This dissertation proposes a novel Compressive Sampling (CS) scheme for Sub-Nyquist Spectrum Sensing (SNSS) of spectrally sparse wideband signals. A novelty of our proposed SNSS scheme resides in the analog front-end. We ...

    • Compressive Sensing based Channel Estimation for Orthogonal Time Frequency Space (OTFS) 

      M V, S Chandra Kishan (2021)
      High speed mobility is a challenging case in wireless communication where orthogonal frequency division multiplexing (OFDM) performance degrades due tohigh Doppler effect. A new modulation scheme orthogonal time frequency ...

    • Defending machine learning models against adversarial attacks using GANs 

      Malaviya, Shubham M. (Dhirubhai Ambani Institute of Information and Communication Technology, 2019)
      We have used Generative Adversarial Network (GAN) to defend against adversarial attacks. Pixel-wise and perceptual distance measures for images are used in the GAN training. We have used five different distance measures, ...

    • Framework for adaptive video streamingIn satellite networks 

      N, Sushantini (Dhirubhai Ambani Institute of Information and Communication Technology, 2018)
      Video streaming over satellite networks has to be tactfully handled because of it's inherent characteristic of high latency that leads to inefficiency if feedback mechanismlike TCP is used. Further if the satellite ...

    • Gradient based Adaptive Channel Estimation for Orthogonal Time Frequency Space (OTFS) 

      Upalekar, Divya Subhash (2021)
      The next generation wireless system with high mobility requirements brings the challenge to mitigate the effect of a time-varying channel. Conventional multicarrier systems like Orthogonal frequency division multiplexing ...

    • Improving the spectral efficiency of Precoded-MIMO Systems 

      Fernandez, Joel (2021)
      Transmit Precoding is used in MIMO systems as it reduces the complexity of the MIMO receiver and simplifies the decoding procedure. A multiple-input multiple-output (MIMO) system with Precoding typically suffers from a ...

    • MIMO reception in Rayleigh and Rician fading with imperfect channel estimation 

      Baranwal, Sweety (Dhirubhai Ambani Institute of Information and Communication Technology, 2019)
      Wireless communication technology has undergone significant improvement over the past decades which has lead to the higher data rates and better bit error rate (BER) performance. There has been increase in the demand for ...

    • Non-Orthogonal Multiple Access 

      K. Sesha, Sai Anudeep (2021)
      At present, the spectrum available in wireless communication systems is limited. To meet the high demands in fifth-generation (5G) wireless communication systems, Non-orthogonal multiple access (NOMA) has been introduced. ...