Mitesh Solanki - Academia.edu (original) (raw)
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Papers by Mitesh Solanki
Many wireless networks are rapidly become part of our daily life. However, range and data rate in... more Many wireless networks are rapidly become part of our daily life. However, range and data rate in wireless devices are limited. One method is to use Multiple-Input Multiple-Output (MIMO) communication system to overcome these limitations. The multiple antennas allow MIMO systems to perform diversity coding (space-time coding), and spatial multiplexing. Beamforming consists of transmitting the same signal with different gain and phase (called weights) over all transmits antennas such that the receiver signal is maximized. Diversity consists of transmitting a single space-time coded stream through all antennas. Spatial multiplexing increases network capacity by splitting a high rate signal into multiple lower rate streams and transmitting them through the different antennas. The results of using these MIMO techniques is higher data rate or longer transmit range without requiring additional bandwidth or transmit power. This paper presents a detailed study of diversity coding for MIMO systems. Different spacetime block coding (STBC) schemes including Alamouti's STBC for 2 transmit antennas as well as orthogonal STBC for 3 and 4 transmit antennas are explored. Finally, these OSTBC techniques are implemented in MATLAB and Simulink. Performance analysis is carried out and system results are observed by transmitting mp3 audio clip using QPSK, 16-QAM, and 64-QAM modulation schemes in Rayleigh fading distributions.
A user-friendly design tool created in the MATLAB/Simulink environment to speed up the design, an... more A user-friendly design tool created in the MATLAB/Simulink environment to speed up the design, analysis, evaluation and measurement of single-loop and multistage sigma-delta (Σ−Δ) modulators at the system level is presented in this paper. The tool covers a variety of Simulinkbased design topologies of low-pass, band-pass and high-pass Σ−Δ modulators.
Many wireless networks are rapidly become part of our daily life. However, range and data rate in... more Many wireless networks are rapidly become part of our daily life. However, range and data rate in wireless devices are limited. One method is to use Multiple-Input Multiple-Output (MIMO) communication system to overcome these limitations. The multiple antennas allow MIMO systems to perform diversity coding (space-time coding), and spatial multiplexing. Beamforming consists of transmitting the same signal with different gain and phase (called weights) over all transmits antennas such that the receiver signal is maximized. Diversity consists of transmitting a single space-time coded stream through all antennas. Spatial multiplexing increases network capacity by splitting a high rate signal into multiple lower rate streams and transmitting them through the different antennas. The results of using these MIMO techniques is higher data rate or longer transmit range without requiring additional bandwidth or transmit power. This paper presents a detailed study of diversity coding for MIMO systems. Different spacetime block coding (STBC) schemes including Alamouti's STBC for 2 transmit antennas as well as orthogonal STBC for 3 and 4 transmit antennas are explored. Finally, these OSTBC techniques are implemented in MATLAB and Simulink. Performance analysis is carried out and system results are observed by transmitting mp3 audio clip using QPSK, 16-QAM, and 64-QAM modulation schemes in Rayleigh fading distributions.
A user-friendly design tool created in the MATLAB/Simulink environment to speed up the design, an... more A user-friendly design tool created in the MATLAB/Simulink environment to speed up the design, analysis, evaluation and measurement of single-loop and multistage sigma-delta (Σ−Δ) modulators at the system level is presented in this paper. The tool covers a variety of Simulinkbased design topologies of low-pass, band-pass and high-pass Σ−Δ modulators.