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We experimentally demonstrate, for the first time by employing newly developed PAM4 chipset and direct detection with commercial 25Gbaud devices, the link operates error free under KR4 FEC threshold at 1310nm wavelength(s) for 100Gb/s up to 40km distance of standard single mode fiber.
High-speed signaling using NRZ has approached speeds above 50Gb/s where it is extremely difficult to maintain power efficiency and performance over a wide variety of channels and applications. PAM-4 is emerging as one way to increase throughput in such band-limited channels. Higher modulation formats help to address cost in optical systems by packing more bits/wavelength [1]. Strong momentum in standards...
HP is developing a MEMS accelerometer that offers high sensitivity and low noise level for seismic application. During the packaging process, it was found that the thermal mechanical stress resulted from the CTE mismatch between the silicon and the substrate can distort the MEMS structure and alter the device performance. A finite element model was established to understand the effect of substrate...
Reproduction of a soundfield is a fundamental problem in acoustic signal processing. A common approach is to use an array of loudspeakers to reproduce the desired field where the least square method is used to calculate the loudspeaker weights. However, the least square method involves matrix inversion which may lead to errors if the matrix is poorly conditioned. In this paper, we derive a new theoretical...
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