Various projects ranging from communication subsystems for small satellites, physical layer design for novel 5G concepts, cooperative networks and various projects on wireless sensor networks. The page gives and overview of research projects in the field wireless communications. Projects are in the field of Wireless Sensor Networks, Satellite Communications, Physical layer design of 3G,4G and 5G communications
Traffic management issues cause accidents around the world incurring a huge loss in terms of money and infrastructure. In a third world country like Pakistan, this issue pertains to absence of any efficient traffic management system due to lack of utilization of recent communication technologies and standards. Here we are proposing a complete system for this purpose. The system is based on vehicular communication using Wireless Sensor Network technology. We are going to propose protocols and framework using communication and information technologies for car to car and car to infrastructure road safety as well as traffic efficiency applications. We will design and implement vehicular communication safety system based on the proposed protocols and framework.
New research areas explored in the following realms
1) Cooperative Spatial modulation
2) Multiuser Spatial modulation with pragmatic STTC
3) Channel Coding based antenna selection and MIMO (in progress)
4) Space-Time Block Coded Spatial Modulation and antenna selection
5) Modulation based AS constellation in OFDM channel conditions
6) Maxwell theory based AS for polarized MIMO
7) 2D 3D arrays for AoA and DoA estimation with selection diversity
8) Constrained optimization problem antenna array mutual coupling array
9) Adaptive antenna selection based on particle filters
10) Beam-forming and side lobe cancellation with antenna selection
This project investigates the possibilities and usage of MIMO techniques (already used in terrestrial NW's) in Satellite systems. The idea is to see if using multiple antennas and Space Time algorithms could increase the performance in LMS systems or not. This project also includes defining new architectures for relaying through HAPS systems with Satellites and terrestrial systems.
Design and development of RF communication sub-system fro small satellites deals in defining and project planning for future small satellite applications. The project includes all design phases from initial application requirements and the complete RF chain.
The final goal of this research is to deploy a constellation of HAAPs (High Altitude Aeronautical
Platform) to provide inflight internet and telephone services. People nowadays always want to
remain connected whether to remain in touch with their loved ones or to keep a close eye on the
business. Since the HAAPs are usually deployed above the air traffic it can provide a low cost
solution for the provision of inflight mobile and data services that can bring substantial revenue to
both the flight carrier and the mobile operators.
Moreover, the same HAAP can be equipped with GPS (Global Positioning System) like
transmitters in order to provide a navigation solution to the users. The Navigation payloads will
transmit timing signals in the L‐band which the receiving user can decode in order to find its
precise location. The constellation can also be used as a disaster management network in the
absence of the primary wired network.
The goal of the test bed is to characterize performance over realistic propagation and interference environments. These environments have statistical variations on the performance that are a function of the absolute position of the antennas. Manually moving the antennas to collect statistically significant observations and data is not a creative use of engineering time. For this reason we have chosen to develop a test bed that has the ability to remotely move antenna positions. This remote control will allow significant amounts of data to be collected without noteworthy man power being spent in monitoring and implementing the tests. The robotic system will be implemented with Lego components to keep the cost and electro-magnetic interaction with equipment to a minimum. A MIMO test bed must be able to provide benchmarks for performance to give context for the measured results. In simulation studies, the benchmarks are provided by Claude Shannon and information theory. In simulation studies, the channel is known and the benchmarks are easily computed. In experimental systems the channel is unknown, hence reporting results without a channel measurement and capacity estimation is not useful. For this reason we have chosen to develop a test bed that has the ability to quasi simultaneously measure system capacity and measure performance of realistic coding and modulation schemes on the measured channels.
Investigation of key areas of improvement in the areas of 4G networks and beyond. The following areas will be explored.
New waveforms similar to OFDM.
Use of cooperative diversity.
Implementation of cognitive radio.
Investigation of advanced modulation schemes.
Use of mmWaves for pencil beam-forming
Interference management in very small and dense networks
Advanced Coding and Modulation schemes like NOMA and FBMC
D2D communication protocols
Advanced MIMO and beamforming
We develop a system that reconstructs and models in 3D for unknown structures and environments using autonomous robot equipped with a radio transceiver in real time. The indoor wireless scanning would be conducted with the help of a smart antenna array which uses narrow beam highly directional antenna beams. These beams would scan the environment and the obstacles within in 2D initially and then all the 2D models would be combined together to form a 3D model. The data collected can be stored in the robotic system and processed online or can be transferred to a remote system where after processing a 3D model is constructed in real time. The raw data received from the robot can be processed to display the unknown environment in 3D on a computer or construct it in a holographic view.
This project deals with the design of a low cost portable data acquisition system in which we have interfaced five different sensors like temperature, humidity, barometric pressure, natural gas and GPS sensors. We have made the transmission of all the data from a remote location to base station using GSM technology and storage of data in SD card in remote unit with time tags. Remote unit is able to send its position information using GPS and a graphical user interface has been designed in computer to see all the coming data and position of the remote module on map. This system can be used for giving route weather to the PMD (Pakistan Meteorological Department). It is reliable compared to analog systems, also used in horticulture and for industrial purposes.
The most important issue in today‟s world is the range of communication of electronic equipment. This paper reveals the design and implementation of a wireless robot whose motion is controlled via phone Call and SMS (Short Message Service) technology. The research aims to develop a mobile robot, exploiting the GSM technology in a network for remote control and communication purposes. The robot (tri-wheel) will be used basically for surveillance purpose in areas where human presence is dangerous. Two DC motors are used to move the tires. Two L298 H-bridge ICs are used to drive the motors.
The robotic motion will be controlled via SMS and Call using mobile phone as command center. Robot is capable of receiving SMSs and calls via GSM module (SIM 900D). In case of call, if any button is pressed a tone corresponding to the button pressed is heard at the other end called „Dual Tone Multiple frequency‟ (DTMF) tone. The robot receives these tones with help of GSM module placed on it.
Command interpretation is done with the help of a microcontroller (PIC16F877a). After completing the required task, the robot sends back a confirmation message to the command center i.e mobile phone. Ultrasonic sensors are also placed on the robot for obstacle detection. The work presented in this paper is about the system design and performance analysis along with discussion of some vital parts of the system.
Cellular communication networks throughout the world are moving towards LTE (Long Term Evolution) that provides high reliability and data rate. In case of emergency situations around the globe like natural disaster i.e. tsunami, earthquake, tornado or in the need of military operation, there is enormous need to provide the communication services to the rescue teams that can be helpful to them during the operation.
SDR (Software Defined Radio) solutions can be extremely helpful for these situations as they are helpful in reducing the hardware and implementing the software side solutions.
This project entirely focuses on providing the necessary solution of alternative rapidly deployed communication setup in emergency situations. By using SDR technologies, we design and implement a Femto Cell based base station that provide voice call and sms services as quickly as possible with efficiently replacing backhaul hardware by real time software applications. Rapid deployment, reducing hardware and cost are the essence of this project.
The aim of the project is to design and develop a telecommand receiver module to be a part of small satellite for the PNSS program. Each submodule would be built and tested in digital hardware like FPGA or DSP and then integrated to design the complete module.