Entity

Time filter

Source Type

Shimla, India

Vij R.,L.R.I.E.T. Solan H.P. | Mishra P.,Shimla University | Singh G.,Lovely Professional University
Proceedings - 2014 4th International Conference on Communication Systems and Network Technologies, CSNT 2014 | Year: 2014

MIMO systems has been proved to be one of the most promising and emerging wireless technologies that can efficiently increase the data transmission rate, improves system coverage, and enhances the link reliability. By employing multiple antennas both at transmitter and receiver side, MIMO techniques enables a new dimension-the spatial dimension-that can be utilized in different ways to combat the impairments of wireless channels. In MIMO system technology, there is intersymbol interference present between the symbols. This paper is focussed on Equalization techniques for Rayleigh Flat fading and Rician Flat fading. It is a well known technique for combating intersymbolinterference. Furthermore, in this paper, we have discussed sphere decoder for MIMO wireless communication system. We analyze the performance of Sphere Decoder with other equalization techniques like Zero forcing(ZF), minimum mean squared error equalizer(MMSE) and maximum likelihood decoder by comparing the Bit error rate(BER). Simulation has been done on MATLAB and result shows that SD provides us the better result in comparison to other techniques for a 2 x 2 MIMO using BPSK in Rayleigh flat fading channel as well as in Rician flat fading. © 2014 IEEE. Source


Singh A.K.,Shimla University | Kaur N.,Shimla University | Sharma D.,Shimla University | Sharma A.,Shimla University
International Journal of Applied Engineering Research | Year: 2014

Electric Vehicle has become one of the key technologies for the research and it covers complex and broad issues across the field of Mechanical and Electrical Engineering. This technology constitutes a breakthrough in various fields that helps in development and offers a number of benefits. This paper shows how EV's will work using solar energy and the regenerative energy. Mechanical energy is converted into electrical energy with the use of dynamo or generator on differential wheel attached to the drive-shaft without causing any disturbance to limited -slip-differential (LSD). The electrical energy thus generated is stored and restored in the battery. This technology also overcomes the monitory battery problem. Recharging will be possible during the motion of the car which will be the best advantage of this concept or idea. This concept is developed considering the future need of free energy and environmental pollution problems. © Research India Publications. Source


Singh A.K.,Shimla University | Kaur N.,Shimla University | Sharma D.,Shimla University | Sharma A.,Shimla University
International Journal of Applied Engineering Research | Year: 2014

Electric Vehicle has become one of the key technologies for the research and it covers complex and broad issues across the field of Mechanical and Electrical Engineering. This technology constitutes a breakthrough in various fields that helps in development and offers a number of benefits. This paper is mainly focused on the improvement in performance of EVs by applying the regenerating electric power by utilizing the energy losses by break and shockers as a input to the battery. This idea enhances the performance of an EV as the need to recharge the battery is substituted by the electric power generated by regeneration process. This idea if implemented will increase the battery pack and the range of EV. © Research India Publications. Source


Sharma A.,Shimla University | Sharma P.,Shimla University
Proceedings of 2014 3rd International Conference on Parallel, Distributed and Grid Computing, PDGC 2014 | Year: 2014

In this paper an area and power efficient 56T 4-bit comparator design has been presented by using GDI technique. The proposed 4-bit comparator design consist of 28 NMOS and 28 PMOS. A GDI full adder module has been used to design this comparator which consumes less area and power at 120 nm as compared to previous full adder designs. The proposed 4- bit comparator design is based on this area and power efficient 10T full adder module. To get area and power efficiency a centralized full adder module has been used which avoid cascade implementation of XOR module to get sum and carry output. Full adder modules outputs have been used for the generation of output of 4-bit comparator designs. The proposed 4-bit GDI comparator has been designed and simulated using DSCH 3.1 and Microwind 3.1 on 120nm. For proposed design Power and current variation with respect to the supply voltage has been performed on BSIM-4 using 120nm technology. Results show that Area of proposed 4- bit comparator design is 1320.3μm2 on 120nm technology. At 1.2V input supply voltage the proposed 4bit GDI comparator consumes 13.739μW power at BSIM-4. At 1.2V proposed GDI 4-bit comparator has shown improvement of 6.3% in terms of area and 69.42% in power as compared to the PTL 4- bit comparator. © 2014 IEEE. Source


Sharma A.,Shimla University | Kaur N.,Shimla University | Singh A.K.,Shimla University
International Journal of Applied Engineering Research | Year: 2014

Electric cars have been around since the inception of the automobile. But in the early race for dominance, the internal combustion engine (ICE) quickly won out as the best power system for cars. There are enormous researches conducted to improvise the performance and battery pack of electric cars (EV). Some suggestions are presented in this review paper to make multi-fuel hybrid cars better with the use of new technology and some simple concepts. ICE cars are one step ahead of hybrid cars due to some factors like refueling time, range, market price, speed, power, battery pack, etc. A new idea is explained for multi-fuel hybrid cars which will increase the efficiency of the vehicle overall. As per data from sources, the overall efficiency of an ICE is 33% while a hybrid dual fuel vehicle running on the road is 20-35% fuel efficient and electric vehicles operate at an efficiency of 85-90% efficiency. After implementing the suggested idea efficiency of a hybrid vehicle will be minimum 70%. Further increase in overall efficiency of a multi-fuel vehicle can be observed with the ideas described below. © Research India Publications. Source

Discover hidden collaborations