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Transmit antenna subset selection in MIMO OFDM system using adaptive mutation Genetic algorithm
Nidhi Sindhwani,Manjit Singh
Mathematics , 2014, DOI: 10.5121/ijmnct.2014.4402
Abstract: Multiple input multiple output techniques are considered attractive for future wireless communication systems, due to the continuing demand for high data rates, spectral efficiency, suppress interference ability and robustness of transmission. MIMO-OFDM is very helpful to transmit high data rate in wireless transmission and provides good maximum system capacity by getting the advantages of both MIMO and OFDM. The main problem in this system is that increase in number of transmit and receive antennas lead to hardware complexity. To tackle this issue, an effective optimal transmit antenna subset selection method is proposed in paper with the aid of Adaptive Mutation Genetic Algorithm (AGA). Here, the selection of transmit antenna subsets are done by the adaptive mutation of Genetic Algorithm in MIMO-OFDM system. For all the mutation points, the fitness function are evaluated and from that value, best fitness based mutation points are chosen. After the selection of best mutation points, the mutation process is carried out, accordingly. The implementation of proposed work is done in the working platform MATLAB and the performance are evaluated with various selection of transmit antenna subsets. Moreover, the comparison results between the existing GA with mutation and the proposed GA with adaptive mutation are discussed. Hence, using the proposed work, the selection of transmit antenna with the maximum capacity is made and which leads to the reduced hardware complexity and undisturbed data rate in the MIMO-OFDM system
Design and Analysis of CMOS Folded Cascode OTA Using Gm/ID Technique
Tapsi Singh,Manjit Kaur,Gurmohan Singh
International Journal of Electronics and Computer Science Engineering , 2012,
Abstract: This paper deals with the design and analysis of folded cascode operational transconductance amplifier in different regions of operations: strong, weak and moderate inversion region. The folded cascode OTA consists of cascode OTA and cascode gain boosting technique. By using 0.35μm technology, the simulation shows DC gain of 78.42dB with a unity gain bandwidth of 446.07 MHz and power consumption of 412.77μW in strong inversion mode. The moderate inversion mode has a DC gain of 93dB and it provides unity gain bandwidth of 75.64MHz with a power consumption of 23.72μW. In weak inversion mode, it has 76.84dB DC gain with a unity gain bandwidth of 19.46 MHz and a power consumption of 0.1μW.
Impact of Post-Harvest Biomass Burning on Aerosol Characteristics and Radiative Forcing over Patiala, North-West region of India
Deepti Sharma,Manjit Singh,Darshan Singh
Journal of the Institute of Engineering , 2011, DOI: 10.3126/jie.v8i3.5927
Abstract: The present study deals with impact of post-harvest biomass burning on aerosol characteristics over Patiala (Lat: 30.33°N; Long: 76.4°E), Punjab state, India during 2008-09, using ground based and satellite data. Results of Aerosol Optical Depth (AOD) measurements using MICROTOPS II show significant variations with highest AOD500 ≈2.65 in October 2008 and ≈1.71 in November 2009. The maximum monthly mean values of angstrom parameters “α” and “β” are 1.13±0.16 and 0.39±0.20, respectively. Daily averaged values of Black Carbon (BC) mass concentration during day time show significant variations (8-18μg/m3) yielding SSA varying from 0.76-0.88 during highly turbid days and 0.95-0.97 during less turbid days. During highly turbid days, the estimated atmospheric radiative forcing using SBDART varies from +43.0 to +86.5Wm-2 suggesting high BC concentration in the atmosphere associated with paddy residue burning in the fields.
Sexually transmitted infections (STIs) in gynae-outpatients: Experience from a tertiary health centre  [PDF]
Harpreet Kaur, Parveen Marwah, Surjit Kaur Bajwa, Amarjit Kaur Gill, Manjit Singh Bal
Health (Health) , 2012, DOI: 10.4236/health.2012.45043
Abstract: Background: Prospective analysis of 500 cases of vaginal discharge in tertiary health centre of Punjab. Objective: To study the prevalence of Sexually transmitted infections (STIs) in 500 outpatient of 15 - 49 years age group with vaginal discharge and to evaluate the various factors influencing pattern of STIs. Method: All cases were subjected to cervical cytology, HIV ELISA, rapid plasma reagen (RPR) test for syphilis and Gram’s staining, Giemsa staining and wet mount study of vaginal discharge. Results: Prevalence of STIs was found to be 58% and majority of infection was caused by G. vaginalis, Candida and Trichomonas. Pap smear showed koilocytosis in 5.6%, mild dysplasia in 1.8% and carcinoma cervix in 1.2% cases. Conclusion: Vaginal discharge is a common gynaecological complaint and STIs are significant cause of vaginal discharge.
Design and Analysis of Hybrid CMOS SRAM Sense Amplifier
Karishma Bajaj,Manjit Kaur,Gurmohan Singh
International Journal of Electronics and Computer Science Engineering , 2012,
Abstract: Sense amplifiers are one of the very important peripheral components of CMOS memories. In a Hybrid Sense amplifier both current and voltage sensing techniques are used which makes it a better selection than a conventional current or voltage sense amplifiers. The hybrid sense amplifier works in three phases-Offset cancellation (200ps), Access phase (500ps) and Evaluation phase. The offset cancellation is done simultaneously with word line decoding, so as to speed up the process. The sensing range of the hybrid sense amplifier is improved from 1.18mV to 92mV. Also hybrid sense amplifier consumes very low energy of about 6.84fj. This sense amplifier is analyzed with a column of 512 SRAM cells at 180nm technology node and compared to CMOS conventional voltage sense amplifier. The circuit consumes an average power of 1.57 μW with a negligible offset of 149.3μV.
HDL Implementation of Low Density Parity Check (LDPC) Decoder
Pawandip Kaur,Manjit Kaur,Gurmohan Singh
International Journal of Electronics and Computer Science Engineering , 2012,
Abstract: Low-Density Parity-Check (LDPC) codes are one of the most promising error-correcting codes approaching Shannon capacity and have been adopted in many applications. These codes offer huge advantages in terms of coding gain, throughput and power dissipation. Error correction algorithms are often implemented in hardware for fast processing to meet the real-time needs of communication systems. However hardwareimplementation of LDPC decoders using traditional Hardware Description Language (HDL) based approach is a complex and time consuming task. In this paper HDL Implementation of Low Density Parity Check Decoder architecture is presented with different rates i.e. 1/2, 2/3, 3/4, 4/7, 8/9, 9/10 and variable data lengths i.e. 8, 16, 32, 64, 128, 256 bits and consequent changeable precision factor.
Low Power Low Noise CMOS Chopper Amplifier
Parneet Kaur,Manjit Kaur,Gurmohan Singh
International Journal of Electronics and Computer Science Engineering , 2012,
Abstract: Chopping is a proficient way to reduce the low frequency offset and 1/f noise in amplifiers. In this paper, a low power low noise CMOS chopper amplifier is presented. It is composed of a two stage amplifier. The first stage’s high output impedance and the equivalent Miller capacitance of the second stage constitute together a low pass filter, which reduces the power consumption. The circuit of the presented amplifier is designed and simulated at 0.18μm CMOS Process and 1.8V supply. The simulation results show that the average power consumption is 44 μW. The chopper amplifier has a gain of 103.5dB and unity gain bandwidth of 100KHz.
Comparison of TACIT Encryption Algorithm with Various Encryption Algorithms
Manmeet Kaur,Manjit Kaur,Gurmohan Singh
International Journal of Electronics and Computer Science Engineering , 2012,
Abstract: A common goal of cryptographic research is to design protocols that provide a confidential and authenticated transmission channel for messages over an insecure network. A cryptographic algorithm is considered to be computationally secured if it cannot be broken with standard resources, either current or future and apart from the algorithm distribution of keys also more important is to make an efficient cryptosystem. TACIT Encryption Algorithm can produce best possible results if key size is the size of the packet expected to pass through the network is small. This paper gives the comparison of the various algorithms with TACIT Encryption Algorithm on the basis of parameters like key length, block size, type and features. This research work investigates HDL implementation of TACIT Encryption Algorithm.
Gingival tuberculosis
Bal Manjit,Bharti Vipin,Singh Aminder
Indian Journal of Pathology and Microbiology , 2009,
Abstract:
Power System Reliability Evaluation Using Fault Tree Approach Based on Generalized Fuzzy Number
Manjit Verma,Amit Kumar,Yaduvir Singh
Journal of Fuzzy Set Valued Analysis , 2012, DOI: 10.5899/2012/jfsva-00106
Abstract: This paper describes a fault tree technique based on generalized fuzzy numbers to a possibility distribution of reliability indices for power systems. Due to uncertainty in the collected data, all the failure probabilities are represented by generalized trapezoidal fuzzy number. In this paper, the fault-tree incorporated with the generalized trapezoidal fuzzy number and minimal cut sets approach is used for reliability assessment of power systems. An example of gas power plant is given to demonstrate the method. By using this approach fuzzy system reliability can be analyzed in a more flexible and more intelligent manner.
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