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Siddanna Gowd, L. C.
- Adaptive MIMO-OFDM Scheme to Reduce Complexity and Optimize User Data Rate over Fading Channel in Wiress Sensor Networks
Abstract Views :181 |
PDF Views:3
Authors
Affiliations
1 ECE Department, AMS Engineering College, T.N, IN
1 ECE Department, AMS Engineering College, T.N, IN
Source
Wireless Communication, Vol 3, No 15 (2011), Pagination: 1020-1025Abstract
The use of multiple antennas at both the transmitter and receiver has been proposed as one of the best way to provide both an increase in reliability and also in information transmission rate. In this paper, the importance of the quantity and quality of the channel state information available at the communication ends is explored so as to achieve high data rates. The different architectures for various degrees of quality and quantity of CSI are studied in this work. The presented architectures are shown to be robust to the uncertainties of CSI. The main focus of this work is to dynamically provide resource allocation so as to achieve better QoS and improve system capacity.Keywords
Multi-Input Multi-Output (MIMO), Orthogonal Frequency Division Multiplexing (OFDM), Channel Side Information (CSI).- Capacity Analysis, Modeling and Simulation of MIMO Wireless Sensor Network
Abstract Views :156 |
PDF Views:3
Authors
Affiliations
1 Electronics and Instrumentation Department, S.K.University, Anantapur, IN
2 S. K. University, Anantapur, IN
1 Electronics and Instrumentation Department, S.K.University, Anantapur, IN
2 S. K. University, Anantapur, IN
Source
Wireless Communication, Vol 2, No 8 (2010), Pagination: 197-202Abstract
In conventional wireless communication system the problem of estimating the parameters such as coherence time, coherence band width etc. is still not accurate. This problem is mainly due to the fact that the mobile receiver can be in motion and also received signals can arrive along multiple reflected paths. In this work, the channel modeling, optimal location reflectors and scatterers with respect to the location of transmitter and receiver and the optimal valve of angular range with the direction of motion of the mobile receiver are to be explored. The effect of the multipath fading both over time and frequency is also to be considered. The algorithms and schemes proposed in this paper shall benefit in the (i) optimal location of scatterers around a receiver moving at a variable speed (ii) realistic modeling of MIMO fading channels overcoming the conventional assumption that fading coefficients between different transmit and receive antennas are independent random variables.Keywords
Multipath Fading, Mobility Models, MIMO Fading Channel, Channel Uncertainty.- Fixed Width Booth Multiplier Based on PEB Circuit
Abstract Views :185 |
PDF Views:2
Authors
Affiliations
1 Department of ECE, A.M.S. Engineering College, T.N., IN
2 ECE Department, A.M.S Engineering College, T.N., IN
3 A.M.S Engineering College, T.N., IN
4 VLSI Design, Department of ECE, A.M.S Engineering College, T.N., IN
1 Department of ECE, A.M.S. Engineering College, T.N., IN
2 ECE Department, A.M.S Engineering College, T.N., IN
3 A.M.S Engineering College, T.N., IN
4 VLSI Design, Department of ECE, A.M.S Engineering College, T.N., IN
Source
Programmable Device Circuits and Systems, Vol 4, No 5 (2012), Pagination: 255-259Abstract
A probabilistic estimation bias (PEB) circuit for a fixed-width two’s complement Booth multiplier is proposed for Low Power and High accuracy. The proposed PEB circuit is derived from theoretical computation, instead of exhaustive simulations and heuristic compensation strategies that tend to introduce curve-fitting errors (interpolation) and exponential-grown simulation time. Consequently, the proposed PEB circuit provides a smaller area and a lower truncation error compared with existing works such as posttruncation and pre-truncation methodologies in Booth Multiplication. Implemented in an 8×8 2-D discrete cosine transform (DCT) core, the DCT core using the proposed PEB Booth multiplier improves the peak signal-to-noise ratio by 17 dB with only a 2% area penalty compared with the direct-truncated method. This PEB circuit also provides extensive applications in digital designs. PEB circuit are more easier to design and can achieve good simulation time in doing computations in higher order bits.Keywords
Discrete Cosine Transform (DCT), Estimation Theory, Fixed-Width Booth Multiplier, Probabilistic Analysis.- Security over the Wireless Sensor Network and Node Authentication using ECCDSA
Abstract Views :216 |
PDF Views:0
Authors
Affiliations
1 Department of Electronics and Communication Engineering, St.Peters University, Chennai - 600054, Tamil Nadu, IN
2 AMS College, Namakkal - 637013, Tamil Nadu, IN
1 Department of Electronics and Communication Engineering, St.Peters University, Chennai - 600054, Tamil Nadu, IN
2 AMS College, Namakkal - 637013, Tamil Nadu, IN