The page presents details of the students and the project which i have supervised. The projects are related to Wireless Sensor Networks, Virtual MIMO wireless communications and physical layer design of LTE etc.
This thesis considers the Semi Round Robin Scheduling (SRRS) tactics that relates different pairing norms to select a pair of users carrying out transmission simultaneously in uplink Virtual Multiple Input Multiple Output (VMIMO) system for Long Term Evolution (LTE). Five different procedures are defined and matched, which are regarded as capacity maximization and complexity reduction. The system throughput and user fairness are analyzed and simulated. As results show SRRS scheme gives a tradeoff between the throughput and fairness in Single User VMIMO (SU-VMIMO) and Multiple User VMIMO (MU-VMIMO). VMIMO with SRRS approach will remarkably improve the system throughput and can achieve the fairness up to 99%.
The field of Wireless Body Area Sensor Networks has foreseen many challenges in the past couple of decades. The development of simulations tools has made it very viable to design and enhance new ideas without being hazardous to any living being. This thesis is a step towards the betterment of human beings. People have always suffered from mysterious diseases and pains. Medical Science is always there to solve the problems with human’s health. Fatigue is also a very common issue with humans. Normally people who perform strenuous exercises and do hard duties complain about fatigue. Now a days, we are able to find the parameters that can measure fatigue. Lactic acid level in blood is the most accurate way of measuring fatigue. In this thesis, a protocol named FAtigue MEasurement (FAME) is proposed. We chose soccer players and soldiers for fatigue measurement. We measure fatigue by the help of implanted and on-body sensors. The results from the sensors form a composite parameter for fatigue measurement. All sensors use a threshold value on which they transmit a fatigue message towards the Base Station (BS). In case of soccer players, the BSs are placed on the boundaries of the ground and for soldiers they are also wearable like the sensors. Our proposed protocol FAME for players is compared with another protocol and it is revealed through results that FAME is better in both throughput and propagation delay profiles. FAME for soldiers is checked for
three types of mobility models. The results show the effectiveness of our proposed protocol.
In the final section of our work, we also give a mechanism to provide relief to the players and soldiers from fatigue. The mechanism help in two ways, provide relief to the muscles and recharge the implanted sensors, as it works. It is shown through simulation results that about 68 % voltage gain is achieved by the help of this mechanism.
Wireless Body Area Sensor Networks (WBASNs) will revolutionize health care services by remote, continuous and non-invasive monitoring. Body area networks should monitor different physiological parameters of a patient’s body for detecting any ailment. In this thesis, a protocol named DARE (Distance Aware Relaying Energy-efficient) has been proposed in which, the sensors carrying information communicate via relaying network to reduce energy consumption in a multi-hop manner to transmit data to the sink to elongate the duration of the entire network. Different hospital ward scenarios are under taken in which, heterogeneous sensors have been incorporated with an aim to minimize energy consumption as well to maximize lifetime of the network. Impact of mobility of patient’s body has also been introduced to investigate the energy consumption and stability of the network. The protocol has also been compared with another protocol of BAN named Mobility-supporting Adaptive Threshold-based Thermal-aware Energy-efficient Multi-hop ProTocol (M-ATTEMPT). The results of the proposed protocol depict increased energy efficiency and maximized network lifetime at the cost of increased delay. Simulations have been carried out in MATLAB v7.8.0.
Multiple Input Multiple Output (MIMO) techniques are used to realize practical high data rate systems which laid the foundation of Long Term Evolution (LTE). Various transmission techniques like Transmit Diversity (TxD), Open Loop Spatial Multiplexing (OLSM) and Closed Loop Spatial Multiplexing (CLSM) are deployed in the realm of MIMO. The spectral efficiency is improved with the help Orthogonal Frequency Division Multiplexing (OFDM). In this paper we will focus on CLSM, to evaluate its performance with the help of Zero Forcing (ZF), Minimum Mean Sqaure Error (MMSE), SoftSphere Decoder (SSD), SSD K-Best (SSDKB) and SIC receivers to find the optimal decoder in LTE environment. The SSD, SSD-KB and SIC uses MMSE based equalizers. The channel environment used are Additive White Gaussian (AWGN), Vehicular A (VehA), Vehicular B (VehB) and an outdoor Pedestrian (Ped B) channel model. A Least Square (LS) estimated feedback obtained by the averaging of two channel instances is used to improve BLER in the case of fading channels.