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Jishnu Aravindakshan

Bio: Jishnu Aravindakshan is an academic researcher. The author has contributed to research in topics: Wireless. The author has an hindex of 1, co-authored 1 publications receiving 1 citations.
Topics: Wireless

Papers
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Journal ArticleDOI
TL;DR: The fundamental problem of self-interference in a full-duplex wireless node is reviewed, multiple techniques for selfinterference cancellation involving analog, digital and hybrid approaches are suggested, and various approaches being discussed today for full duplex are surveyed.
Abstract: India has experiened an explosive growth in broadband customers over the last three years from 192 million [1] in September 2016 to 407 million in 2017 [2], and further to 481 million in Sept 2018 [3]. Of all the internet subscribers in India as on September 2018 [3], only 21 million are on wireline broadband whereas more than 370 million are using 4G. In summary, the primary telecom infrastructure for access is, and will be, wireless in India for the foreseeble future not only for voice applications but also for broadband, and by extension, for IoT (Internet of Things) as well. We expect the same to be true globally of many developing countries but this also true in many areas of the developed world where the infrastructure is based on copper. The ambition for wireless is to provide infrastructure better than copper where it is impossible, or economically infeasible, to lay fiber. We are in the Information Age about which Arthur C. Clarke said, ‘‘The Information Age offers much to mankind, and I would like to think that we will rise to the challenges it presents. But it is vital to remember that information—in the sense of raw data—is not knowledge, that knowledge is not wisdom, and that wisdom is not foresight. But information is the first essential step to all of these.’’ Facilitated by broadband connectivity, we have embraced the first step and are generating as much information as we can, and as quickly as possible. However, the average LTE speed in India is 6.07 Mbps as per Opensignal Report [4] and is much lower than the 44 Mbps in Singapore due to higher user density in India and but neither country is happy with it. The 4G availability in Korea is 97.49% whereas India has an availability of 86.26% with no country even approaching the 99.999% reliability which is required to handle applications such as remote surgery. The network latency in India varies from 66–80 ms [5] and while many countries are indeed better, the network latencies are still is much higher than what newer applications demand. The requirement to improve user-experienced data rate, reliability and latency for mission critical applications is triggering the development of a new wireless infrastructure to be established broadly through ‘‘5G’’ or ‘‘IMT 2020.’’ The key aspect of higher user-experienced data rate is addressed through more spectrum and greater spectral efficiency. More spectrum drives us to use millimeter-wave bands, and higher spectral efficiency drives us to adopt advanced techniques like full-duplex and massive MIMO. Full-duplex wireless technology enables users to transmit and receive at the same time, and in the same frequency band, thus effectively doubling the data rate, or spectral efficiency. The paper by Arjun Nadh, Rakshith Jagannath and Radha Krishna Ganti surveys various approaches being discussed today for full duplex. This paper reviews the fundamental problem of self-interference in a full-duplex wireless node, and suggests multiple techniques for selfinterference cancellation involving analog, digital and hybrid approaches. Increased capacity can be achieved by using multiple antennas and this approach is termed MIMO (Multiple & Jishnu Aravindakshan jishnu@tejasnetworks.com

1 citations


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Book ChapterDOI
01 Jan 2021
TL;DR: In this article, a finite impulse response filter (FIRF) architecture is proposed to denoise electrocardiogram (ECG) signals known as Vedic design-carry look-ahead (VD-CLA) adder.
Abstract: This manuscript refers to the features of a novel finite impulse response (FIR) filter (FIRF) architectural design to denoise electrocardiogram (ECG) signals known as Vedic design-carry look-ahead (VD-CLA) adder. Few research workings dealt with signal denoising with an effective multiplier scheme. The recommended VD-CLA architecture denoises ECG signals as follows: the MATLAB IDE developed part of the VD-CLA treats the input ECG signals tainted by additive white Gaussian noise (AWGN) that can be read from files. The VD-CLA denoising module employed a Verilog realization with the corresponding achieved outputs written in binary text files accessible to MATLAB developed code. The implemented FIRF utilized a low-power multiplier to become faster and more effective than other conventional deployments. Experimental results corroborate the improvements and show that the VD-CLA is suitable for FPGA and embedded designs.

2 citations