The inauguration of the Orientation Programme organized to welcome the fresh batch of students at SRM University-AP, Andhra Pradesh was preceded by an introduction of the various aspects of the university by the management. The dynamic leaders motivated the Freshmen by revealing the differentiating factor of SRM AP that endorses the excellence of the university. Upon invocating the blessings of the Almighty by a prayer, the occasion commenced with an address by Dr P Sathyanarayanan, President. He highlighted his vision of learning beyond the classroom, fostering wisdom and knowledge of the students through a holistic interdisciplinary approach.
Further, Prof V S Rao, Vice-Chancellor, acquainted students with the various processes of SRM AP. He informed students regarding his revolutionizing plans for the students of emphasizing on research from the first semester. He states, “Research should be seamlessly integrated with academic boundaries”. He also inspired students to realize the excitement of science, joy in engineering, and academic rigour. In line with his vision, Prof D Narayana Rao, Pro Vice-Chancellor, emphasized on the contribution of science and technology that led to the progress and superiority of India across nations. Further, he assures quality education to motivate students and urged them to contribute to the development of the nation.
To continue with the orientation programme, eminent personalities have been requested by SRM AP to initiate motivational discussions. Dr. Jaya Prakash Narayana, Former Secretary to Govt. of Andhra Pradesh, Dr R A Mashelkar, FRS, Former Director General CSIR & Chancellor-JIO University, Padma Bhushan Dr. K. Varaprasad Reddy, Chairman Emeritus-Shantha Biotech, Mrs Saritha, IPS, Additional SP-CID, Dr MC Das, Management Consultant-Vijayawada, and Head of the Dept. of Commerce (Retd.)-Loyola College, Mr Vivek Bhide, Entrepreneur, Co-Founder, and Managing Director-TSL Consulting Pvt Ltd, VV Lakshminarayana, Former Joint Director- CBI, Ms Karuna Gopal, President-Foundation for futuristic cities, Mr Ramesh Loganathan, Professor Co-Innovation/Outreach at IIIT Hyderabad, and Ms Anitha Sakuru, Chief Marketing officer-Platifi Solutions, will be delivering lectures during various sessions sprawled across the 2 week programme organized to encourage Freshmen.
SRM University-AP, Andhra Pradesh affectionately welcomes the Freshmen 2020 to embark on the erudite journey that would transform their lives, and steer them towards becoming a global professional. The university is organizing an online Orientation Programme from September 16, 2020 till September 29, 2020 to provide insights concerning the life at SRM AP.
At the onset, the dynamic leaders of SRM AP will be addressing the Freshmen on September 16, 2020, at 2 p.m. Dr P Sathyanarayanan, Founder, President & Chairman will be delivering the inaugural address. Further, Prof V S Rao, Vice-Chancellor, will be presenting the welcome speech where he will be introducing the various elements of the university. Finally, Prof D Narayana Rao, Pro Vice-Chancellor, will be presenting the vote of thanks.
Eminent personalities have been requested to initiate motivational discussions during the Orientation Programme. Dr. Jaya Prakash Narayana, Former Secretary to Govt. of Andhra Pradesh, will be speaking on September 17, 2020 at 2.30 p.m., followed by a session at 4 p.m. by Dr R A Mashelkar, FRS, Former Director General CSIR & Chancellor-JIO University. On the next day, Padma Bhushan Dr. K. Varaprasad Reddy, Chairman Emeritus-Shantha Biotech will be delivering a speech at 11 a.m. The students will get to hear from Mrs Saritha, IPS, Additional SP-CID, on September 19, 2020 at 11 a.m. Progressing with the programme, SRM AP requests Dr Nv Warlu, a certified Neurolinguistic Programming trainer, personality development coach, writer, motivator, and educator, to inspire the Freshmen on September 21, 2020 at 10.45 a.m. Also, Dr MC Das, Management Consultant-Vijayawada, and Head of the Dept. of Commerce (Retd.)-Loyola College, will be presenting a lecture on September 22, 2020 at 11 a.m.
Moving ahead, Mr Vivek Bhide, Entrepreneur, Co-Founder, and Managing Director-TSL Consulting Pvt Ltd, will be encouraging the young students of SRM AP on September 23, 2020 at 11 a.m. by speaking on “How to develop a start-up culture”. Further, VV Lakshminarayana, Former Joint Director- CBI, will be taking the dais on September 24, 2020 at 11 a.m. while, Ms Karuna Gopal, President-Foundation for futuristic cities has been invited to speak on September 25, 2020 at 11 a.m. where she will be emphasizing on “Role of Students in Building New India”.
Mr Ramesh Loganathan, Professor Co-Innovation/Outreach at IIIT Hyderabad, will be addressing the students on September 26, 2020 at 11 a.m. Also, Ms. Anitha Sakuru, Chief Marketing officer-Platifi Solutions, will be delivering an entrepreneurial talk on September 28, 2020 at 11 a.m. In addition, the deans, departmental heads, and faculty members of SRM AP will introduce the departments, labs, clubs, facilities, online classes, and centres of the university during various sessions sprawled across the 2 week orientation programme. Along with it, the freshmen will get the opportunity to interact with Prof V S Rao followed by the senior students who would advise and motivate the students to ease their predicaments.
Simulating time-variant channel impulse response for mmWave I2I channels using Doppler spread information
Dr Anirban Ghosh
Dr Anirban Ghosh, Assistant Professor, Electronics and Communication Engineering, has recently published a paper titled “Time Variance of 60 GHz VI2I channel”. The paper is published in the renowned journal Elsevier-Vehicular Communication with an Impact Factor of 4.7. This paper explores the implementation challenges in unlicensed 60 GHz frequency band for autonomous vehicle infrastructure. This work has been implemented in collaboration with his colleagues from NIT Durgapur and collaborators from Brno University under the aegis of Prof. Ales Prokes. This work is also funded by the Science Foundation grant (Czech) and National Sustainability Program grant (Czech) and DST-Core Research Grant(India).
Fig 1: Field test setup at the measurement site
Smart cities are cities on the move; having a mission of delivering people and goods with zero congestion, zero fatality and zero energy wastage. For realising this mission, a smart city needs an intelligent transport system (ITS). As far as the communication aspect of ITS is concerned, historically, the urban ITS planners were more concerned about vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) modes of communication. This is because the V2V and V2I channels are essentially wireless, and establishing reliable low-latency links over these channels is challenging. Infrastructure-to-infrastructure (I2I) communication is also an integral part of the ITS initiative, and due to their rapid, dynamic and non-invasive nature of the installation, wireless I2I links are preferred over wired links in several smart-road based ITS applications. In order to implement wireless I2I communication, transceivers may be fitted with different kinds of roadside units (RSUs), e.g., short height traffic signposts, overhead gantries, and cantilever sign supports. The traditional role of these RSUs is to support the basic ITS goals, i.e. driver assistance or traffic management. As the vehicular networks scale-up, ITS computations are being shifted to the edge, and the RSUs are going to play more prominent roles in the form of edge computing devices. For example, RSUs can form the cloudlet layer of a vehicular fog computing (VFC) architecture for the internet of vehicles (IoV).
Vehicular wireless I2I channels realise fixed-to-fixed (F2F) radio communication between two RSUs. For any F2F radio channel with stationary transmitter (TX) and receiver (RX), the time-variance is caused by the mobility of the scatterers. These mobile scatterers, say passersby for an indoor scenario, or passing vehicles for an outdoor scenario, cause changes in path lengths in a fading multipath channel. When viewed in frequency-domain, this yields a change in carrier frequency termed as Doppler shift which is proportional to the velocity of the scatterer, and the spectral broadening caused by the time rate of change of the channel is measured with the Doppler spread. Information about Doppler spread is critical for V2V applications such as platooning. In the context of V2I applications, accurate estimation of the Doppler spread is required for designing adaptive transceivers, smart antennas and for determining cellular handoffs. Doppler spread information can also be used for I2I applications like speed estimation. The radar-based solution has a lower latency compared to a camera-based solution, owing to the video acquisition and processing time of the later. As the Doppler shift is a linear function of the carrier frequency, it is of greater concern while moving up in the frequency ladder to the millimetre wave (mmWave) regime. The Doppler spread in the unlicensed 60 GHz mmWave band would be 10-30 times that in the current sub-6 GHz band, with a range spanning from 10 Hz to 20 kHz depending on the velocity of the scatterers. Moreover, compared to V2V links, the effect of moving scatterers is much more pronounced in F2F links; walking pedestrians with a velocity order of ∼ 1 m/s or even the tree leaves fluttering in the wind are important for F2F channel modelling. For highways, the moving vehicles have a velocity an order higher (> 10 m/s) and contribute significantly to the time-variance of the roadside wireless I2I links.
Fig 2: Comparison of the measured and
proposed models of ACF and Doppler
Spectrum with existing analytical models
In this paper, Dr Ghosh studied the time-variance of a roadside infrastructure to infrastructure (I2I) channel operating at 60 GHz millimetre wave (mmWave) band, where the time-variance is caused by moving vehicles acting as scatterers. At first, measurement data is obtained by placing the transmitter (TX) and the receiver (RX) at different heights to emulate a link between two nonidentical roadside units (RSUs), and time-domain channel sounding is performed by sending complementary Golay sequences from the TX to the RX. A linear piecewise interpolation of the corresponding temporal auto-correlation function (ACF) is used to find the Doppler spread of the I2I channel, where their interpolation method compensates for a slower sampling rate. Next, a framework is presented for the time-variant channel impulse response (CIR) simulation, which focuses on moving scatterers only and validates the linear piecewise ACF model. The framework is useful for time-variant vehicular I2I channel simulation and in speed estimation related vehicular applications. Finally, a double-slope curve-fitted analytical model for ACF is proposed as a generalisation to the linear piecewise model. The proposed model and its Doppler spectrum are found to be in agreement with the analytical results for fixed-to-fixed (F2F) channels with moving scatterers and matches perfectly with the measured data. “Our research has explained a framework for simulating time-variant channel impulse response (CIR) for mmWave I2I channels with moving scatterers using Doppler spread information – which provides means to study the various characteristics of an I2I channel even without carrying out any expensive channel sounding campaign”, said Dr Ghosh.
Dr Ghosh and his collaborators are currently exploring further challenges in communication between vehicles (V2V) in the same frequency range (60 GHz).
To know more about the paper, please visit- https://www.sciencedirect.com/science/article/abs/pii/S2214209620300590?dgcid=coauthor
Dr Somesh Tiwari has received Mentoring of Engineering Teachers by INAE (Indian National Academy of Engineering) Fellowship -2020.
Dr Somesh Vinayak Tewari, Assistant Professor, Department of Electronics and Electrical Engineering, brings another honour for SRM University-AP. He has been selected for Mentoring of Engineering Teachers by INAE (Indian National Academy of Engineering) Fellowship -2020. His mentor during the programme will be Dr Archana Sharma, FIE, FNAE, Outstanding Scientist, Bhabha Atomic Research Centre.
The INAE (Indian National Academy of Engineering) provides funding to an Engineering Teacher for carrying out research in the selected/proposed area to be mentored by an INAE fellow. The scheme attempts to increase the knowledge base and is instrumental in building long term collaborations. Such mentoring program helps in bridging the collaboration between an academic area and a research and development organization which is extremely necessary to sow the seeds of research in young and energetic brains so that they are able to translate their research ideas for further growth. This interaction of ideas leads to a win-win situation for both the University and the research organization. The prestigious and highly competitive fellowship receives thousands of applications nationwide though only fifteen of them finally are selected for the fellowship this year by INAE. Dr Somesh is one of fifteen outstanding researchers.
Dr Tiwari will be working on the proposed research topic- “Studies on Inertial Electrostatic Confinement Concept in Deuterium gas environment”. Inertial Electrostatic Confinement (IEC) is an alternative concept to Magnetic and Inertial fusion. IEC fusion device is an extremely compact and simple device, running by high voltage as discharge on Deuterium -Deuterium/Deuterium-Tritium/Deuterium -3He fuel gases. Studies related to IEC find application in the areas of dosimeter calibration, isotope production, radiography, and has medical applications. Such a research is multifaceted and helps an engineering teacher to enhance his skills in experimental areas of high voltage, plasma physics, vacuum techniques, radiation detection and measurement and in numerical methods and simulation leading to a comprehensive analysis of a given problem. During the two months of the fellowship, Dr Archana Sharma will be mentoring the project. It is an excellent opportunity for our faculty to work with such a renowned scientist in such close proximity. The collaboration will be beneficial for both institutions.