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Now showing items 11-20 of 39
Low Power LO Generation Based On Frequency Multiplication Technique
(2008-08-27)
TO achieve high level of integration in order to reduce cost, heterodyne architecture has made way for low-IF and zero-IF (direct conversion) receiver architectures. However, a very serious issue in implementing both zero ...
Electronic Access Control Systems: A New Approach
(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, ...
Estimation Of Object Shape From Scattered Field
(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 ...
Studies on Amorphous Silicon Thin Films Doped with Aluminium
(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 ...
Design Of Linear Precoded MIMO Communication Systems
(2009-07-09)
This work deals with the design of MT transmit, MR receive antenna MIMO (Multiple Input Multiple Output) communication system where the transmitter performs a linear operation on data. This linear precoding model includes ...
Coding For Multi-Antenna Wireless Systems And Wireless Relay Networks
(2009-03-04)
Communication over a wireless channel is a challenging task because of the inherent fading effects. Any wireless communication system employs some form of diversity improving techniques in order to improve the reliability ...
Improved GMM-Based Classification Of Music Instrument Sounds
(2009-03-19)
This thesis concerns with the recognition of music instruments from isolated notes. Music instrument recognition is a relatively nascent problem fast gaining importance not only because of the academic value the problem ...
Joint Evaluation Of Multiple Speech Patterns For Speech Recognition And Training
(2009-12-09)
Improving speech recognition performance in the presence of noise and interference continues to be a challenging problem. Automatic Speech Recognition (ASR) systems work well when the test and training conditions match. ...
Blind Detection Techniques For Spread Spectrum Audio Watermarking
(2009-08-13)
In spreads pectrum (SS)watermarking of audio signals, since the watermark acts as an additive noise to the host audio signal, the most important challenge is to maintain perceptual transparency. Human perception is a very ...
Low Correlation Sequences Over AM-PSK And QAM Constellations
(2009-08-13)
Direct-Sequence Code Division Multiple Access (DS-CDMA), over the last few years, has become a popular technique and finds a place in many modern communication systems. The performance of this technique is closely linked ...