no code implementations • 11 Aug 2023 • R. S. Prasobh Sankar, Sundeep Prabhakar Chepuri
In this paper, we focus on radar imaging using active sensing with a single transceiver and reconfigurable intelligent surface (RIS).
no code implementations • 11 Mar 2023 • R. S. Prasobh Sankar, Sidharth S. Nair, Siddhant Doshi, Sundeep Prabhakar Chepuri
In this paper, we present an unsupervised learning neural model to design transmit precoders for integrated sensing and communication (ISAC) systems to maximize the worst-case target illumination power while ensuring a minimum signal-to-interference-plus-noise ratio (SINR) for all the users.
no code implementations • 17 Jan 2023 • R. S. Prasobh Sankar, Sundeep Prabhakar Chepuri
Hybrid reconfigurable intelligent surfaces (HRIS) are RIS architectures having both active and passive elements.
no code implementations • 3 Nov 2022 • R. S. Prasobh Sankar, Sundeep Prabhakar Chepuri
In this paper, we present a novel reconfigurable intelligent surface (RIS)-assisted integrated sensing and communication (ISAC) system with 1-bit quantization at the ISAC base station.
no code implementations • 15 Jun 2022 • R. S. Prasobh Sankar, Sundeep Prabhakar Chepuri, Yonina C. Eldar
On the other hand, the dual-RIS assisted ISAC system improves both minimum user SINR as well as worst-case target illumination power at the targets, especially when the users and targets are not directly visible.
no code implementations • 11 Mar 2022 • R. S. Prasobh Sankar, Sundeep Prabhakar Chepuri
In this paper, we consider a hybrid reconfigurable intelligent surface (RIS) comprising of active and passive elements to aid an integrated sensing and communication (ISAC) system serving multiple users and targets.
no code implementations • 19 Sep 2021 • R. S. Prasobh Sankar, Sundeep Prabhakar Chepuri
Using the developed noise model, we then present a two-step channel estimation algorithm to estimate a multipath channel parameterized by the gains, angles of arrival (AoAs), and angles of departure (AoDs).
no code implementations • 5 May 2021 • R. S. Prasobh Sankar, Battu Deepak, Sundeep Prabhakar Chepuri
In this paper, we use a reconfigurable intelligent surface (RIS) to enhance the radar sensing and communication capabilities of a mmWave dual function radar communication system.
no code implementations • 2 Nov 2020 • Battu Deepak, R. S. Prasobh Sankar, Sundeep Prabhakar Chepuri
Channel estimation in reconfigurable intelligent surface (RIS) assisted multiple input multiple output (MIMO) communication systems is challenging as pilots cannot be decoded at or transmitted from a RIS with only passive elements.
no code implementations • 23 Oct 2020 • R. S. Prasobh Sankar, Sundeep Prabhakar Chepuri
This paper focuses on channel estimation for mmWave MIMO systems with 1-bit spatial sigma-delta analog-to-digital converters (ADCs).