Projects

This page contains summary of the prototypes of wireless systems that

were built by me in the industry.
are being currently built by me .

Next Generation Wireless Research and Standardization on 5G+ and 6G

Focus in this project will be on to incorporate the theoretical research being done in the group to 5G+ and 6G standards

Figures below show some example research areas on which we will be focusing in this project.

Unmanned aerial vehicles (UAVs) integration in 5g+/6G
- UAVs have better channel conditions than GUEs – observe Line of Sight channel
- Investigate interference from UAVs will affect GUEs
- Analyze the performance and design interference-mitigating transmitter and receiver algorithms

Relays are used to improve the coverage – currently half-duplex
- Require separate spectrum for backhaul link between base station and relay
- FD relays (IAB) do not require separate spectrum
- Explore resource allocation to avoid interference between access and backhaul link

OTFS for high-speed vehicular communication
- Helps avoid inter-subcarrier interference
- Design transmitter and receive algorithms
- Investigate how it can be incorporated in 5G+ and 6G standards

Design of Indigenous 5G Testbed

We have build a 5G testbed that incorporates millimeter Wave, massive MIMO and full-duplex technologies. The project is funded by Department of Telecommunications (DOT), Govt. of India. The complete hardware and software has been designed in-house from scratch and based on our own intellectual property.

Designed at - IIT Madras, SAMEER Chennai, CEWiT Chennai, IIT Bombay,IIT Kanpur.
[Status] - Ongoing.

Figures below show the network architecture, and various network components which we have built.

5G testbed network architecture

Radio access network consisting of remote radio head, baseband unit and antennas
- Designed at - IIT Madras, SAMEER Chennai, IIT Kanpur.
Core network
- Designed at CEWiT Chennai, IIT Bombay.

Remote radio head with 16,32,64 antennas

PCIe form factor baseband unit

Core network

Various task done

Satellite communication system design

We design softwares to detect satellite communication signals.

Virtual Full-Duplex Relaying in Cellular Systems

We are building a relay system that will achieve the performance of full-duplex relaying using half-duplex relays. This system is based on a novel relaying protocol proposed by us recently.

Designed at - IIT Kanpur.
[Status] - Ongoing.

Picture of Lab set-up.

4G Radio Access Network Testbed

A testbed consisting of four base stations and twelve users was built at IIT Madras to experimentally investigate the novel wireless communication algorithms in realistic fading and interference settings. As a part of this project, I designed, built and tested the testbed hardware from scratch, and also developed LTE PHY layer algorithms to exercise the testbed.

Designed at - Center of Excellence in Wireless Technology (CEWiT).
[Status] - Complete.

Picture of table-top set-up of the testbed.

Design of WiMAX Base Station and User Equipment.

The objective was to build a WiMAX system using an off-the-shelf WCDMA radio. For this project, I built a common hardware platform for both base station and user equipment and also developed WiMAX physical layer algorithms.

Designed at - Midas Communications.
[Status] - Complete.

Picture of hardware of the WiMAX base station.

Design of 3G DECT Modem

Designed modem algorithms for 3G DECT modem.

Designed at - IIT Madras.
[Status] - Complete.

Picture of hardware of the 3G mobile station.