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Underwater signal processing includes several application areas like military application, disaster detection, finding natural resources, etc. When signal transmits through water, it may get overlap due to some inherent mechanisms like ship noise, wind noise, marine mammals noise, noise generated during all stages of oil production, and due to other industrial sources. In this paper, the main focus...
In underwater signal processing, acoustic signals are used to transmit and receive information for communication. But the acoustic signals get affected due to spreading, reverberation, attenuation and absorption which produce ambient noise. Ambient noise is the background noise created due to natural sources as well as anthropogenic (man-made) sources. Ambient noise can be characterized as Gaussian,...
Counting of semen straw is challenging task due to a smaller size of straws, non-uniform bunch, and presence of liquid nitrogen. Straws are placed in the compact bunch with liquid nitrogen surrounding for preservation. Straw diameter is tiny (0.2 mm). Therefore, manual counting is tedious and produces inaccurate counting results. In such condition, automatic counting can be achieved by using image...
We present efficient MOS-capacitor based silicon photonic modulators driven by low-power CMOS inverter based driver ICs. Operating under the lumped-element approximation, modulation formats of NRZ, PAM, and QAM are demonstrated.
In the era of health information exchanges, there are trade-offs to consider when sharing a patient’s medical record among all providers that a patient might choose. Exchange among in-network partners on the same electronic medical records (EMR) and other integrated information systems is trivial. The patient identifier is common, as are the relevant departmental systems, to all providers. Difficulties...
We describe a silicon photonic optical modulator based on a MOS-capacitor and a low power 1V CMOS inverter-based driver IC. In an MZI configuration, this efficient modulator and driver IC combination can produce a 9dB extinction ratio at 28 Gbps, at a wavelength of 1310nm.
We experimentally demonstrate back-to-back transmission of QAM-16 at 56 Gb/s over a single polarization, representing a dual polarization system link of 112 Gb/s, without using an electrical DAC, on a CMOS Photonics platform
We present an efficient MOS-capacitor based silicon modulator. In an MZI configuration, a 9dB extinction ratio at 28 Gbps is achieved from the 1V output of a low-power CMOS inverter driver IC.
The idea of the Speaker Recognition Project is to implement a recognizer which can identify a person by processing his/her voice. The basic goal of the project is to recognize and classify the speeches of different persons. This classification is mainly based on extracting several key features like Mel Frequency Cepstral Coefficients (MFCC's) from the speech signals of those persons by using the process...
Increasing ambient noise levels in the oceans has been a cause of concern due to its impact on sonar performance deployed for military as well as non-military applications as they present sub-optimal behavior in poor SNR conditions. Classical noise filtering techniques offer limited utility in tropical littoral waters because of the random fluctuation of the ambient noise. The repeated surface and...
The performance predictions for sonar assume a background of Gaussian noise, however, deviation from this assumption may generate false alarms. This paper attempts to find out whether the ambient noise in tropical waters of the western coast of Indian continental is Gaussian. Gaussianity is tested using graphical, numerical and verified using formal normality tests like Kolmogorov Smirnov (KS) test...
We report 2427km, 112Gb/s DP-QPSK optical transmission using the smallest Silicon Photonic modulator and lowest power CMOS MZM driver. BER characterization of this device demonstrates comparable performance relative to a commercial LiNbO3 modulator.
This paper investigates better time frequency representations of littoral water ambient noise recorded at 30 meter of depth in Indian tropical water. Linear time frequency representations (TFR) like spectrogram and Continuous Wavelet Transform are compared by combining natural and anthropogenic ambient noise sources from the tropical waters. Underwater ambient noise is represented by appropriate wavelet...
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