Rate, Diversity & spectrum require a fundamental tradeoff in wireless
communication. Emergence of... more Rate, Diversity & spectrum require a fundamental tradeoff in wireless communication. Emergence of multiple antenna system h as opened another very resourceful dimension space for information transmission in the air. This system provides high gain in capacity without increasing the use of spectrum reliability power consumption & less sensitivity to fading. In MIMO channels the available detection scheme like Zero Forcing (ZF), Maximum likely Hoods (ML), Minimum Mean- Square Erro r (MMSE) & Maximum Ratio Combining (MRC) provide high optimal performance but complexity is high. V-BLAST architecture reduces this complexity by splitting the information bit stream into several sub stream & transmit them in parallel, using a set of transmitter antennas. V-BLAST detection algorithm includes the interference cancellation, interference nulling and optimal ordering procedure. In this paper a new symbol detection algorithm is used for MIMO systems with features of V-BLAST. This gives better error performance than linear receivers at the expense of increased but tolerable level of complexity. Index terms: Multiple Input Multiple Output (MIMO), Zero Forcing
Abstract - Multicarrier DS-CDMA systems combine OFDM techniques and DS-CDMA to provide advantages... more Abstract - Multicarrier DS-CDMA systems combine OFDM techniques and DS-CDMA to provide advantages of both. OFDM is now regarded as a feasible alternative to the single carrier modulation techniques for high data rate communication systems mainly because of its inherent ...
Digital communications of sensing symbol vectors has found abundant diverse uses. These symbols a... more Digital communications of sensing symbol vectors has found abundant diverse uses. These symbols are determinate alphabet conducted over a multiple-input multiple-output (MIMO) channel having Gaussian noise. Proficient algorithms are reflected in exposure eg. Latches and have recognized well. The sphere decoder algorithm has optimal performance with reduced complexity. At high SNR the algorithm has a polynomial average complexity and is worst case complexity. The proficiency of the algorithm is the exponential rate cradle of growth. Complexity is affirmative for the numerous SNR and is small in the high SNR. To attain the sphere decoding solution, Schnorr-Euchner is applied through Maximum likelihood method, Depth-first Stack-based Sequential decoding. Thus this paper is focus on the receiver part of the transceiver system and provides a good look of optimal algorithm by vector symbol transmitted through MIMO channel.
Optimal results in Radical prostatectomy depend upon a delicate balance of two competing goals i.... more Optimal results in Radical prostatectomy depend upon a delicate balance of two competing goals i.e Oncologic safety and a favourable functional result. Thus a technology which can augment surgeon's ability for better nerve preservation without resulting in a positive surgical margin is highly desirable. We evaluated Multiphoton microscopy and the phenomenon of Second Harmonic Generation (SHG) and Fluorescence following excitation of tissues as an innovative technique for in-vivo imaging of prostate.
In the paper, vectors are regarded as column vectors. These are written in lowercase bold charact... more In the paper, vectors are regarded as column vectors. These are written in lowercase bold characters. For matrices, uppercase bold characters are used. and E {.}denote the Euclidean norm, transpose, complex conjugate transpose and expected value, respectively.
We perform spectral simulations of dynamo for magnetic Prandtl number of one with Taylor-Green fo... more We perform spectral simulations of dynamo for magnetic Prandtl number of one with Taylor-Green forcing. We observe dynamo transition through a supercritical pitchfork bifurcation. Beyond the transition, the numerical simulations reveal complex dynamo states with windows of constant, periodic, quasiperiodic, and chaotic magnetic field configurations. For some forcing amplitudes, multiple attractors were obtained for different initial conditions. We show that one of the chaotic windows follows the period-doubling route to chaos.
This paper evaluates the performance of Alamouti Space Time Code (A-STC) with Space Time Trellis ... more This paper evaluates the performance of Alamouti Space Time Code (A-STC) with Space Time Trellis Code (STTC). In the proposed scheme, we fix the number of transmit antenna and vary the number of receive antenna with 4-PSK modulation for Rayleigh fading channel. When we compare the performance of Alamouti Space Time Code with Space Time Trellis Code for less than or equal to 4 receive antennas, Alamouti Space Time Code performs better but with increase in number of receive antennas the performance of both the codes approaches closer to each other although Alamouti Space Time Code is still superior to Space Time Trellis Code. For Rician Fading channel we selected 2:1 Alamouti Code. The result shows that Space Time Trellis Code gives enhanced result and provides advantage of coding gain when compared with Alamouti Space Time Code.
Rate, Diversity & spectrum require a fundamental tradeoff in wireless
communication. Emergence of... more Rate, Diversity & spectrum require a fundamental tradeoff in wireless communication. Emergence of multiple antenna system h as opened another very resourceful dimension space for information transmission in the air. This system provides high gain in capacity without increasing the use of spectrum reliability power consumption & less sensitivity to fading. In MIMO channels the available detection scheme like Zero Forcing (ZF), Maximum likely Hoods (ML), Minimum Mean- Square Erro r (MMSE) & Maximum Ratio Combining (MRC) provide high optimal performance but complexity is high. V-BLAST architecture reduces this complexity by splitting the information bit stream into several sub stream & transmit them in parallel, using a set of transmitter antennas. V-BLAST detection algorithm includes the interference cancellation, interference nulling and optimal ordering procedure. In this paper a new symbol detection algorithm is used for MIMO systems with features of V-BLAST. This gives better error performance than linear receivers at the expense of increased but tolerable level of complexity. Index terms: Multiple Input Multiple Output (MIMO), Zero Forcing
Abstract - Multicarrier DS-CDMA systems combine OFDM techniques and DS-CDMA to provide advantages... more Abstract - Multicarrier DS-CDMA systems combine OFDM techniques and DS-CDMA to provide advantages of both. OFDM is now regarded as a feasible alternative to the single carrier modulation techniques for high data rate communication systems mainly because of its inherent ...
Digital communications of sensing symbol vectors has found abundant diverse uses. These symbols a... more Digital communications of sensing symbol vectors has found abundant diverse uses. These symbols are determinate alphabet conducted over a multiple-input multiple-output (MIMO) channel having Gaussian noise. Proficient algorithms are reflected in exposure eg. Latches and have recognized well. The sphere decoder algorithm has optimal performance with reduced complexity. At high SNR the algorithm has a polynomial average complexity and is worst case complexity. The proficiency of the algorithm is the exponential rate cradle of growth. Complexity is affirmative for the numerous SNR and is small in the high SNR. To attain the sphere decoding solution, Schnorr-Euchner is applied through Maximum likelihood method, Depth-first Stack-based Sequential decoding. Thus this paper is focus on the receiver part of the transceiver system and provides a good look of optimal algorithm by vector symbol transmitted through MIMO channel.
Optimal results in Radical prostatectomy depend upon a delicate balance of two competing goals i.... more Optimal results in Radical prostatectomy depend upon a delicate balance of two competing goals i.e Oncologic safety and a favourable functional result. Thus a technology which can augment surgeon's ability for better nerve preservation without resulting in a positive surgical margin is highly desirable. We evaluated Multiphoton microscopy and the phenomenon of Second Harmonic Generation (SHG) and Fluorescence following excitation of tissues as an innovative technique for in-vivo imaging of prostate.
In the paper, vectors are regarded as column vectors. These are written in lowercase bold charact... more In the paper, vectors are regarded as column vectors. These are written in lowercase bold characters. For matrices, uppercase bold characters are used. and E {.}denote the Euclidean norm, transpose, complex conjugate transpose and expected value, respectively.
We perform spectral simulations of dynamo for magnetic Prandtl number of one with Taylor-Green fo... more We perform spectral simulations of dynamo for magnetic Prandtl number of one with Taylor-Green forcing. We observe dynamo transition through a supercritical pitchfork bifurcation. Beyond the transition, the numerical simulations reveal complex dynamo states with windows of constant, periodic, quasiperiodic, and chaotic magnetic field configurations. For some forcing amplitudes, multiple attractors were obtained for different initial conditions. We show that one of the chaotic windows follows the period-doubling route to chaos.
This paper evaluates the performance of Alamouti Space Time Code (A-STC) with Space Time Trellis ... more This paper evaluates the performance of Alamouti Space Time Code (A-STC) with Space Time Trellis Code (STTC). In the proposed scheme, we fix the number of transmit antenna and vary the number of receive antenna with 4-PSK modulation for Rayleigh fading channel. When we compare the performance of Alamouti Space Time Code with Space Time Trellis Code for less than or equal to 4 receive antennas, Alamouti Space Time Code performs better but with increase in number of receive antennas the performance of both the codes approaches closer to each other although Alamouti Space Time Code is still superior to Space Time Trellis Code. For Rician Fading channel we selected 2:1 Alamouti Code. The result shows that Space Time Trellis Code gives enhanced result and provides advantage of coding gain when compared with Alamouti Space Time Code.
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Papers by R. Yadav
communication. Emergence of multiple antenna system h as opened another
very resourceful dimension space for information transmission in the air. This
system provides high gain in capacity without increasing the use of spectrum
reliability power consumption & less sensitivity to fading. In MIMO channels
the available detection scheme like Zero Forcing (ZF), Maximum likely
Hoods (ML), Minimum Mean- Square Erro r (MMSE) & Maximum Ratio
Combining (MRC) provide high optimal performance but complexity is high.
V-BLAST architecture reduces this complexity by splitting the information bit
stream into several sub stream & transmit them in parallel, using a set of
transmitter antennas. V-BLAST detection algorithm includes the interference
cancellation, interference nulling and optimal ordering procedure. In this paper
a new symbol detection algorithm is used for MIMO systems with features of
V-BLAST. This gives better error performance than linear receivers at the
expense of increased but tolerable level of complexity.
Index terms: Multiple Input Multiple Output (MIMO), Zero Forcing
communication. Emergence of multiple antenna system h as opened another
very resourceful dimension space for information transmission in the air. This
system provides high gain in capacity without increasing the use of spectrum
reliability power consumption & less sensitivity to fading. In MIMO channels
the available detection scheme like Zero Forcing (ZF), Maximum likely
Hoods (ML), Minimum Mean- Square Erro r (MMSE) & Maximum Ratio
Combining (MRC) provide high optimal performance but complexity is high.
V-BLAST architecture reduces this complexity by splitting the information bit
stream into several sub stream & transmit them in parallel, using a set of
transmitter antennas. V-BLAST detection algorithm includes the interference
cancellation, interference nulling and optimal ordering procedure. In this paper
a new symbol detection algorithm is used for MIMO systems with features of
V-BLAST. This gives better error performance than linear receivers at the
expense of increased but tolerable level of complexity.
Index terms: Multiple Input Multiple Output (MIMO), Zero Forcing