Diploma in ECE from Kalpana Chawla Govt. Polytechnic for Women, Ambala City
B.Tech in ECE from KUK, Kurukshetra with honours.
M.Tech in VLSI Design form PEC, Chandigarh
P.hd in ECE from PEC, Chandigarh and topic of thesis is "Low Power and Long Range Wireless Sensor Node for IOT"
RESEARCH, TEACHING, or OTHER INTERESTS
Engineering, Electrical and Electronic Engineering, General Engineering
FUTURE PROJECTS
LoRa based project
Applications Invited
4
Scopus Publications
Scopus Publications
Practical Implementation and Performance Evaluation of LoRaWAN Gateway Komal Devi, Rita Mahajan, Deepak Bagai 2024 International Conference on Recent Innovation in Smart and Sustainable Technology Icrisst 2024, 2024 The advent of the Internet of Things (IoT) has significantly increased the number of applications using sensor technology, which has redefined sensor networking. Short-range wireless technologies offer high data rates and frequently use unlicensed spectrums. On the other hand, cellular technologies provide a more extensive range and a higher data rate, and they operate in the licensed spectrum. To bridge the gap between these two technologies and provide a cost-effective, long-range solution capable of connecting numerous scattered devices, Low Power Wide Area Networks (LPWAN) were developed. LPWANs utilize unlicensed spectrums and can transmit data over long distances, providing connectivity for devices located in remote or challenging environments. Long Range (LoRa) continues to draw attention due to its flexible specification and the accessibility of hardware with guarantees to provide kilometers of coverage in adverse situations. It is a long-range, energy efficient low power technology that is used to connect wireless sensor devices in an Internet of Things (IoT) network and is widely used in a variety of wireless communication applications. This paper aims to describe the implementation and coverage testing of a multichannel Long Range Wide Area Network (LoRaWAN) gateway for this technology. This implementation aims to increase LoRa coverage in New Chandigarh, India, and to allow open access for testing a range of IoT devices. The spreading factor 7 facilitates a maximum transmission distance of 3.1 km.
Designing and testing of low-power air quality monitoring sensor node using LoRa technology Komal Devi, Rita Mahajan, Deepak Bagai International Journal of Sensor Networks, 2024 There has been a significant increase in the attention given by researchers to air quality monitoring due to its direct impact on human health. This paper presents the design and development of a low-power, long-range-based air quality monitoring device with 66 days of battery life and measurements in 1 h intervals. The proposed design uses a SEN54 sensor that can measure various environmental parameters including temperature, humidity, volatile organic compounds, and particulate matter levels. The performance of the air quality monitoring system is evaluated by installing it in multiple locations. The ThingSpeak IoT platform service analyses and visualises the data collected by the sensor node to provide real-time values for temperature, humidity, volatile organic compounds, and particulate matter. The best part of this visualisation is the presentation of the battery voltage data which serves as a helpful reminder to users to change the battery when needed.
Long range-based low-power wireless sensor node Komal Devi, Rita Mahajan, Deepak Bagai ETRI Journal, 2023 Sensor nodes are the most significant part of a wireless sensor network that offers a powerful combination of sensing, processing, and communication. One major challenge while designing a sensor node is power consumption, as sensor nodes are generally battery‐operated. In this study, we proposed the design of a low‐power, long range‐based wireless sensor node with flexibility, a compact size, and energy efficiency. Furthermore, we improved power performance by adopting an efficient hardware design and proper component selection. The Nano Power Timer Integrated Circuit is used for power management, as it consumes nanoamps of current, resulting in improved battery life. The proposed design achieves an off‐time current of 38.17309 nA, which is tiny compared with the design discussed in the existing literature. Battery life is estimated for spreading factors (SFs), ranging from SF7 to SF12. The achieved battery life is 2.54 years for SF12 and 3.94 years for SF7. We present the analysis of current consumption and battery life. Sensor data, received signal strength indicator, and signal‐to‐noise ratio are visualized using the ThingSpeak network.
Area efficient parallel LFSR for cyclic redundancy check Rita Mahajan, Komal Devi, Deepak Bagai International Journal of Electrical and Computer Engineering, 2020 Cyclic Redundancy Check (CRC), code for error detection finds many applications in the field of digital communication, data storage, control system and data compression. CRC encoding operation is carried out by using a Linear Feedback Shift Register (LFSR). Serial implementation of CRC requires more clock cycles which is equal to data message length plus generator polynomial degree but in parallel implementation of CRC one clock cycle is required if a whole data message is applied at a time. In previous work related to parallel LFSR, hardware complexity of the architecture reduced using a technique named state space transformation. This paper presents detailed explaination of search algorithm implementation and technique to find number of XOR gates required for different CRC algorithms. This paper presents a searching algorithm and new technique to find the number of XOR gates required for different CRC algorithms. The comparison between proposed and previous architectures shows that the number of XOR gates are reduced for CRC algorithms which improve the hardware efficiency. Searching algorithm and all the matrix computations have been performed using MATLAB simulations.
