Publications by authors named "N H Karapetyan"
Article Synopsis
- Performing pattern recognition in the optical domain can offer benefits like high-speed operation and the ability to adjust and scale based on optical wave properties.
- This study combines optical correlation with optical biasing to achieve efficient QPSK pattern recognition using direct detection, eliminating the need for complex coherent detection.
- The experimental results show successful error-free recognition of multiple QPSK patterns over 3072 symbols at different baud rates, indicating effective performance with specific power thresholding values.
Compared to its electronic counterpart, optically performed matrix convolution can accommodate phase-encoded data at high rates while avoiding optical-to-electronic-to-optical (OEO) conversions. We experimentally demonstrate a reconfigurable matrix convolution of quadrature phase-shift keying (QPSK)-encoded input data. The two-dimensional (2-D) input data is serialized, and its time-shifted replicas are generated.
View Article and Find Full Text PDFA study of rats liver DNA damages under the influence of X-ray radiation at a dose of 6.5 Gy(LD60) was carried out. The radioprotective properties of newly synthesized Cu(II) L-Schiff Histidinate complexes were also studied.
View Article and Find Full Text PDFBackground: Annually, approximately 200 new ovarian cancer cases are diagnosed in Armenia, which is considered an upper-middle-income country. This study aimed to summarize the survival outcomes of patients with relapsed ovarian cancer in Armenia based on the type of recurrence, risk factors, and choice of systemic treatment.
Methods: This retrospective case-control study included 228 patients with relapsed ovarian cancer from three different institutions.
Article Synopsis
- * Researchers successfully demonstrate an optically-assisted method for averaging two 4-phase-encoded data streams at high rates of 10 and 20-Gbaud, resulting in a 7-phase-encoded output.
- * The process involves three key stages: phase encoding with an optical modulator, summation using nonlinear fiber, and multicast through a lithium niobate waveguide, with the final output showing increased error vector magnitudes and optical signal-to-noise ratio penalties.