Electrical Communication Engineering (ECE): Recent submissions

Now showing items 361-380 of 383

    • Electronic Access Control Systems: A New Approach 

      Janardhana Swamy, V C (Indian Institute of Science, 2006-08-30)
      Security systems are gaining increasing importance in recent times to protect life and valuable resources. Many advanced methods of providing security have been developed and are in use in the last few decades. Of these, ...

    • A Study On Effects Of Phase - Amplitude Errors In Planar Near Field Measurement Facility 

      Varughese, Suma (Indian Institute of Science, 2006-07-26)
      Antenna is an indispensable part of a radar or free space communication system. Antenna requires different stringent specifications for different applications. Designed and fabricated for an intended application, antenna ...

    • Non-Invasive Microwave Hyperthermia 

      Habash, Riadh W Y (Indian Institute of Science, 2006-01-18)
      Presented in this thesis are the following theoretical investigations carried out on the non-invasive microwave hyperthermia of malignant tumours in the human body: Fundamental concepts of electromagnetic wave ...

    • Electrical Properties Of Diamond Like Carbon Films In Metal-Carbon-Silicon (MCS) Structure 

      Reddy, K Siva Sankara (Indian Institute of Science, 2006-01-18)
      Amorphous carbon film with Diamond like properties is the subject of intense interest in the past one and half decade. The unusual properties of these diamond like carbon films arise from the preponderance of SP3 tetrahedral ...

    • Optimal Control Problems In Communication Networks With Information Delays And Quality Of Service Constraints 

      Kuri, Joy (Indian Institute of Science, 2005-11-10)
      In this thesis, we consider optimal control problems arising in high-speed integrated communication networks with Quality of Service (QOS) constraints. Integrated networks are expected to carry a large variety of traffic ...

    • Synthesis of Arbitrary Antenna Arrays 

      Nagesh, S R (Indian Institute of Science, 2005-10-27)
      Design of antenna arrays for present day requirements has to take into account both mechanical and electrical aspects. Mechanical aspects demand the antennas to have low profile, non-protruding structures, structures ...

    • Studies on Amorphous Silicon Thin Films Doped with Aluminium 

      Ho, Kang Jin (Indian Institute of Science, 2005-10-25)
      Amorphous Silicon(a-Si) films have attracted the attention of several investigators as it is an economical material for devices. One of the problems that is addressed is the doping of these films after they are prepared. In ...

    • DSP Techniques for Performance Enhancement of Digital Hearing Aid 

      Udayashankara, V (Indian Institute of Science, 2005-10-20)
      Hearing impairment is the number one chronic disability affecting people in the world. Many people have great difficulty in understanding speech with background noise. This is especially true for a large number of elderly ...

    • Speech Encryption Using Wavelet Packets 

      Bopardikar, Ajit S (Indian Institute of Science, 2005-10-07)
      The aim of speech scrambling algorithms is to transform clear speech into an unintelligible signal so that it is difficult to decrypt it in the absence of the key. Most of the existing speech scrambling algorithms tend ...

    • Phase Sensitive Estimation Of Fluorescence Lifetime For Fiber Optic Biosensors 

      Vadde, Venkatesh (Indian Institute of Science, 2005-10-04)
      Fluorescence lifetime determination and allied studies find application in spectroscopy in general and fiber optic biosensors in particular. Instruments and sensors cited in literature however use open loop, intensity based ...

    • Performance Analysis Of A Variation Of The Distributed Queueing Access Protocol 

      Gautam, S Vijay (Indian Institute of Science, 2005-10-04)
      "A distributed queueing Medium Access Control (MAC) protocol is used in Distributed Queue Dual Bus (DQDB) networks. A modified version of the MAC protocol was proposed by R.R. Pillai and U. Mukherji in an attempt to overcome ...

    • Modelling And Analysis Of Event Message Flows In Distributed Discrete Event Simulators Of Queueing Networks 

      Shorey, Rajeev (Indian Institute of Science, 2005-10-03)
      Distributed Discrete Event Simulation (DDES) has received much attention in recent years, owing to the fact that uniprocessor based serial simulations may require excessive amount of simulation time and computational ...

    • Estimation Of Object Shape From Scattered Field 

      Buvaneswari, A (Indian Institute of Science, 2005-09-27)
      The scattered field from an object, when illuminated with ultrasound, is useful in the reconstruction of it's cross section - a problem broadly classified as 'tomography'. In many situations of medical imaging, we will ...

    • Dynamic Dealy Compensation and Synchronisation Services for Continuous Media Streams 

      Shivaprasad, Mala A (Indian Institute of Science, 2005-09-14)
      Multimedia' nature of an application refers to the presence of several media streams in parallel. Whether it is receiving real-time data or retrieving stored data, there exists an end-to-end delay in data transfer from ...

    • Lambda Bipolar Transistor (LBT) in Static Random Access Memory Cell 

      Sarkar, Manju (Indian Institute of Science, 2005-07-07)
      With a view to reduce the number of components in a Static Random Access Memory (SRAM) cell, the feasibility of use of Lambda Bipolar Transistor (LBT)in the bistable element of the cell has been explored under the present ...

    • Methods for Blind Separation of Co-Channel BPSK Signals Arriving at an Antenna Array and Their Performance Analysis 

      Anand, K (Indian Institute of Science, 2005-06-30)
      Capacity improvement of Wireless Communication Systems is a very important area of current research. The goal is to increase the number of users supported by the system per unit bandwidth allotted. One important way of ...

    • Diffraction Tomographic Imaging With A Circular Array 

      Vasuki, A (Indian Institute of Science, 2005-06-02)
      In the conventional diffraction tomography a linear array is used to receive forward scattered field. Then a standard algorithm like back propagation or Fourier domain interpolation is used for reconstruction of the object. ...

    • A Study On Bandpassed Speech From The Point Of Intelligibility 

      Ganesh, Murthy C N S (Indian Institute of Science, 2005-04-06)
      Speech has been the subject of interest for a very long time. Even with so much advancement in the processing techniques and in the understanding of the source of speech, it is, even today, rather difficult to generate ...

    • Design and Development of a Hybrid TDMA/CDMA MAC Protocol for Multimedia Wireless Networks 

      D, Rajaveerappa (Indian Institute of Science, 2005-03-30)
      A wireless local area network (WLAN) provides high bandwidth to users in a limited geographical area. This network faces certain challenges and constraints that are not imposed on their wired counterparts. They are: frequency ...

    • A Hybrid Knowledge-Based System for Process Plant Fault Diagnosis 

      Pramanik, Saugata (Indian Institute of Science, 2005-03-11)
      Knowledge-Based Systems (KBSs) represent a relatively new programming approach and methodology that has evolved and is still evolving as an important sub-area of Artificial Intelligence (AI) research. The most prevalent ...