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This paper seeks to investigate an approach of photonic reservoir computing for optical speech recognition on an examination isolated digit recognition task. An analytical approach in photonic reservoir computing is further drawn on to decrease time consumption, compared to numerical methods; which is very important in processing large signals such as speech recognition. It is also observed that adjusting...
In this paper, an ultra wide-band low-noise amplifier (LNA) based on coupled inductors is designed. A noiseless resistor similar to the inductive degeneration technique is created using coupled inductors. This resistor does not reduce the gain. The LNA is designed in the standard 0.18 µm CMOS technology. Simulation is performed by MATLAB and Agilent technology advanced designed systems (ADS). The...
In this circuit, a UWB LNA circuit with new input stage is proposed. In this scheme, a combination of coupled inductors and a new structure based on notch filter in input stage is utilized. As a result, the input stage is able to easily reject in-band and out-band interference with 43.2 dB and 25.1 dB respectively. This input stage is applied in an LNA. The simulations verify that the LNA has a peak...
In this paper, a photonic microwave bandpass filter with negative coefficient is investigated. The output light from a phase modulator and a polarization-maintaining fiber (PMF) is sent to the optical polarizer. Negative coefficient is generated due to the optical interference of the two polarization modes using the polarizer. A two-tap microwave bandpass filter with one negative coefficient is demonstrated.
In this paper a tunable photonic notch filter based on all-optical mixing using a single narrow-linewidth optical source and a variable time delay line is presented. In the proposed filter, the optical carrier emitted from a laser source is externally intensity modulated by a subcarrier signal and then applied to a second intensity modulator. By using a variable polarization beamsplitter, a Hi-Bi...
In this paper, an all-optical signal processor that performs both microwave mixing and bandpass filtering with negative coefficients is investigated. The negative coefficients are obtained by locating the optical carriers at the opposite slopes of the Mach-Zehnder optical filter, for the PM-IM conversion. We present a general model for using in a radio-over fiber link. The RF signal can be recovered...
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