Students' Reading Group,
Electrical Engineering,
IIT Bombay

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PHASE III

Presenter Name	Kaustuv Kanti Ganguli
Cluster	EE4/EE5
Email-id:	kkganguli.09@gmail.com
Topic:	How different is 'different': Culture-aware techniques in music similarity research
Venue:	GG 302
Session Chair:	Vineet Gokhkle
Date:	20/07/2016 at 3 PM
Pre-Requisite:	None
Abstract:	Certain types of music calm us while others make us run. Is this just a coincidence or does some natural physiological phenomenon guide this? While modern science uses psychoacoustic experiments to quantitatively explain human hearing, the higher-level cognition process in the brain is still not well understood. With an introduction to the field of music information retrieval (MIR), the first part of the talk will overview the role and scope of technology in music appreciation, navigation, listening, and pedagogy. A raga performance in Hindustani music builds upon a melodic framework where the characteristic phrases of the raga make repeated appearances but with considerable creative variation while also strongly retaining their identity in the listener’s ears. The second half of the talk will discuss this aspect of melodic similarity, i.e. to quantify how different is ‘different’? The idea is to motivate how judicious use of both data and knowledge in a cognitively based computational model can derive rich, context-aware information. The aim of the talk is to propose a representation-cum-similarity measure that can closely model human-judgement of melodic similarity.

Presenter Name	Nandakumar Nambath
Cluster	EE4/EE5
Email-id:
Topic:	HOW TO EQUALIZE LIGHT? - the story of a 100-Gb/s analog processing receiver
Venue:	GG 301
Session Chair:
Date:	29/07/2016 at 3 PM
Pre-Requisite:	None
Abstract:	High speed data transmitted over optical fiber suffer from dispersion, carrier phase offsets, and clock synchronization issues. Equalization, carrier phase recovery and compensation, and clock and data recovery are the three signal processing operations at the receiver side of a coherent optical system. Traditional digital coherent receivers used in long haul links are not suitable for short reach links because of the large power dissipation, size, and cost. We propose a coherent receiver in which signal processing is carried out in the analog domain as a solution for these problems. A 100-Gb/s coherent optical receiver designed in ST 130nm BiCMOS technology comprises an equalizer for mitigating the effects of channel dispersion and a carrier phase recovery and compensation module for correcting the phase and frequency offsets. The equalizer relies on the constant modulus algorithm for its weight coefficient update and the carrier phase recovery and compensation module is realized using a decision-assisted Costas loop. The receiver having an equalizer and two carrier phase recovery and compensation modules dissipates 3.5W of power.

Presenter Name	Saurabh Pinjani and Ashwin Lele Third Year Undergraduates, Electrical Engineering
Cluster	EE4/EE5
Email-id:	saurabh.29pinjani@gmail.com ashwinlele.2009@gmail.com
Topic:	The Bright Alternative: Perovskite Solar Cells
Venue:	GG 301
Session Chair:
Date:	24/08/2016 at 5.30 PM
Pre-Requisite:	None
Abstract:	Solar Cell Technology can change the energy situation across the globe providing clean renewable energy. Various novel materials and device architectures have been suggested as replacement for traditional silicon solar modules. However perovskite based solar have displayed unprecedented improvement in performance in just 3-4 years of active research. However issues like hysteresis and low durability present challenges in large scale deployment. The talk will also showcase our efforts in understanding the cause of hysteresis and unravelling the device physics behind degradation in performance.

Presenter Name	Darshak K Bhatt PhD, Electrical Engineering
Cluster	EE4/EE5
Email-id:	darshak@ee.iitb.ac.in
Topic:	Challenges in designing and testing Radio Frequency Integrated Circuits
Venue:	GG 301
Session Chair:	Siva Rama Krishna
Date:	29/08/2016 at 4 PM
Pre-Requisite:	None
Abstract:	In recent years, progress in wireless technology has demanded high quality receiver design in terms of low power, low cost and high integration. The IEEE 802.11 (Wifi and WiMax) standard uses OFDM technology which requires the front end receiver to be highly linear, with low noise and better selectivity. Technologies involving GaAs, HEMT and BJT provide significant improvement in RF front end circuits, but due to the requirement of high level integration of RF front end with the back end, these technologies impose more cost and complexity. Modern RF CMOS technology is a promising solution.In the receiver design, one of the critical components is RF Mixer, a circuit that converts a signal in Radio Frequency to an Intermediate Frequency signal. This talk focuses on designing low noise and highly linear RF mixers for Wi-Fi and WiMAX applications. The proposed design will be discussed in detail while addressing its design and testing challenges.

Presenter Name	Debapratim Ghosh, Research scholar working with Prof. Girish Kumar
Cluster	EE4/EE5
Email-id:	deba21pratim@gmail.com
Topic:	Extracting complex data from real quantities- The Six Port Reflectometer
Venue:	GG 302
Session Chair:	Sharayu Jagtap
Date:	21/09/2016 at 3 PM
Pre-Requisite:	Basic understanding of microwave concepts (equivalently, a UG-level course should have been done)
Abstract:	S-parameter measurement is vital for characterizing any circuit or device at microwave frequencies. The instruments used to measure S-parameters are immensely complex in design, as they must be able to measure both magnitude and phase of the S-parameters. The six port reflectometer (SPR) presents a simpler alternative where one can extract phase information using magnitudes alone. In this talk, we shall visit this little-known concept and how it achieves what it claims. Following this, we shall discuss one of the SPRs we have designed at IIT Bombay.