Sumit Kumar
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View article: Artificial Intelligence implementation of onboard flexible payload and adaptive beamforming using commercial off-the-shelf devices
Artificial Intelligence implementation of onboard flexible payload and adaptive beamforming using commercial off-the-shelf devices Open
Very High Throughput satellites typically provide multibeam coverage, however, a common problem is that there can be a mismatch between the capacity of each beam and the traffic demand: some beams may fall short, while others exceed the re…
View article: Reduced Complexity Initial Synchronization for 5G NR Multibeam LEO-Based Non-Terrestrial Networks
Reduced Complexity Initial Synchronization for 5G NR Multibeam LEO-Based Non-Terrestrial Networks Open
This paper presents a computationally efficient technique to mitigate the overall Carrier Frequency Offset (CFO) impairment introduced by the User Equipment (UE) crystal oscillator imperfection and the Doppler effect introduced by the sate…
View article: 5G-NR Over Transparent Payload GEO Satellites: A Hands-On Approach Using OpenAirInterface5G-NTN
5G-NR Over Transparent Payload GEO Satellites: A Hands-On Approach Using OpenAirInterface5G-NTN Open
The inclusion of Non-Terrestrial Network (NTN) components has significantly enhanced the reach of 5G networks. OpenAirInterface5G (OAI) has developed an open-source, Software-Defined Radio (SDR)-based framework for 5G-NTN, using its Terres…
View article: Enhancing Throughput in 5G-NTN through Early RLC Layer Retransmissions
Enhancing Throughput in 5G-NTN through Early RLC Layer Retransmissions Open
View article: 5G Non-Terrestrial Networks With OpenAirInterface: An Experimental Study Over GEO Satellites
5G Non-Terrestrial Networks With OpenAirInterface: An Experimental Study Over GEO Satellites Open
The 3rd Generation Partnership Project (3GPP) aims to integrate non-terrestrial networks (NTNs) with terrestrial 5G networks. In this context, prototyping and testing are essential to demonstrate the readiness of new 5G-NTN releases. Howev…
View article: Experimental Study of the Effects of RLC Modes for 5G-NTN Applications Using OpenAirInterface5G
Experimental Study of the Effects of RLC Modes for 5G-NTN Applications Using OpenAirInterface5G Open
Provisioning of 5G services via Non-Terrestrial Networks (5G-NTN) has become a reality. Currently, 5G-NTN is being developed by adapting the 5G Terrestrial Network (5G-TN) protocol which presents several challenges as the satellite channel…
View article: Adaptive Timers and Buffer Optimization for Layer-2 Protocols in 5G Non-Terrestrial Networks
Adaptive Timers and Buffer Optimization for Layer-2 Protocols in 5G Non-Terrestrial Networks Open
Interest in the integration of Terrestrial Networks (TN) and Non-Terrestrial Networks (NTN); primarily satellites; has been rekindled due to the potential of NTN to provide ubiquitous coverage. Especially with the peculiar and flexible phy…
View article: Robust Beamforming for IRS Aided MIMO Full Duplex Systems
Robust Beamforming for IRS Aided MIMO Full Duplex Systems Open
In this paper, a novel robust beamforming for an intelligent reflecting surface (IRS) assisted FD system is presented. Since perfect channel state information (CSI) is often challenging to acquire in practice, we consider the case of imper…
View article: IRS Assisted MIMO Full Duplex: Rate Analysis and Beamforming Under Imperfect CSI
IRS Assisted MIMO Full Duplex: Rate Analysis and Beamforming Under Imperfect CSI Open
peer reviewed
View article: OpenAirInterface as a platform for 5G-NTN Research and Experimentation
OpenAirInterface as a platform for 5G-NTN Research and Experimentation Open
500
View article: Architectures and Synchronization Techniques for Distributed Satellite Systems: A Survey
Architectures and Synchronization Techniques for Distributed Satellite Systems: A Survey Open
Cohesive Distributed Satellite Systems (CDSSs) is a key enabling technology for the future of remote sensing and communication missions. However, they have to meet strict synchronization requirements before their use is generalized. When c…
View article: Analyzing standard RF Waveform Designs for WPT
Analyzing standard RF Waveform Designs for WPT Open
The possibility to harvest energy from ambient\nradio-frequency (RF) sources has intrigued humankind since past\nseveral decades. In this context, there has been a tremendously\ngrowing research interest in the field of wireless power tran…
View article: A Cubesat-Ready Phase Synchronization Digital Payload for Coherent Distributed Remote Sensing Missions
A Cubesat-Ready Phase Synchronization Digital Payload for Coherent Distributed Remote Sensing Missions Open
Distributed antenna arrays, fractionated payloads and cooperative platforms can provide unprecedented performance in the next generation of spaceborne communications and remote sensing systems. Remote phase synchronization of physically se…
View article: Random Access Procedure over Non-Terrestrial Networks: From Theory to Practice
Random Access Procedure over Non-Terrestrial Networks: From Theory to Practice Open
Non-terrestrial Networks (NTNs) have become an appealing concept over the last few years and they are foreseen as a cornerstone for the next generations of mobile communication systems. Despite opening up new market opportunities and use c…
View article: Coexistence of Communications and Cognitive MIMO Radar: Waveform Design and Prototype
Coexistence of Communications and Cognitive MIMO Radar: Waveform Design and Prototype Open
New generation of radar systems will need to coexist with other radio frequency (RF) systems, anticipating their behavior and reacting appropriately to avoid interference. In light of this requirement, this paper designs, implements, and e…
View article: Random Access Procedure Over Non-Terrestrial Networks: From Theory to Practice
Random Access Procedure Over Non-Terrestrial Networks: From Theory to Practice Open
peer reviewed
View article: Experimental Evaluation of RF Waveform Designs for Wireless Power Transfer Using Software Defined Radio
Experimental Evaluation of RF Waveform Designs for Wireless Power Transfer Using Software Defined Radio Open
The possibility to harvest energy from ambient radio-frequency (RF) sources has intrigued humankind for the past several decades. In this context, there has been a tremendously growing research interest in the field of wireless power trans…
View article: A Remote Carrier Synchronization Technique for Coherent Distributed Remote Sensing Systems
A Remote Carrier Synchronization Technique for Coherent Distributed Remote Sensing Systems Open
COHESAT, Cognitive Cohesive Networks of Distributed Units for Active and Passive Space Applications.
View article: A Remote Carrier Synchronization Technique for Coherent Distributed Remote Sensing Systems
A Remote Carrier Synchronization Technique for Coherent Distributed Remote Sensing Systems Open
Phase, frequency, and time synchronization are crucial requirements for many applications, such as multi-static remote sensing and communication systems. Moreover, the synchronization solution becomes even more challenging when the nodes a…
View article: An SDR implementation of WiFi receiver for mitigating multiple co-channel ZigBee interferers
An SDR implementation of WiFi receiver for mitigating multiple co-channel ZigBee interferers Open
View article: Randomness Assists in Wireless Connectivity
Randomness Assists in Wireless Connectivity Open
View article: Design of Secure and Reliable MU-MIMO Transceiver System for Vehicular Networks
Design of Secure and Reliable MU-MIMO Transceiver System for Vehicular Networks Open
MU-MIMO (Multi-User MIMO) has been a promising technique for vehicular networks to achieve faster communication. Conventional MU-MIMO transceiver is designed with One-dimensional (1-D) improper modulation schemes such as Binary Phase Shift…
View article: Architecture for simultaneous multi-standard software defined radio receiver
Architecture for simultaneous multi-standard software defined radio receiver Open
Motives par les capacites du SDR, nous theorisons dans ce travail un recepteur de definition radio multi-standard simultane (SMS-SDR). Un recepteur SMS-SDR sera capable de decoder simultanement les informations de plusieurs standards sans …
View article: Full-Duplex eNodeB and UE Design for 5G Networks
Full-Duplex eNodeB and UE Design for 5G Networks Open
The recent progress in the area of self-interference cancellation (SIC) design has enabled the development of full-duplex (FD) single and multiple antenna systems. In this paper, we propose a design for FD eNodeB (eNB) and user equipment (…