نتایج جستجو برای: optical receiver
تعداد نتایج: 317495 فیلتر نتایج به سال:
Optical communication with two-photon coherent states—Part II: photoemissive detection and structured receiver performance, " IEEE Trans. Optical communication with two-photon coherent states—Part III: quantum measurements realizable with photoemissive detec tors, " IEEE Trans. Quantum noise and excess noise in optical homodyne and het erodyne receivers, " IEEE J.
An optical-electrical sub-sampling down-conversion receiver architecture leveraging low-jitter optical sampling is described. A simple interface between the optical and electrical domains is accomplished by combining a photodiode with a second-order continuous-time ∆Σ modulator. A prototype system implemented in 0.18 μm CMOS achieving 36.4 dB SNR in a 2 MHz BW with an OSR of 250 is demonstrated.
Visible Light Communication (VLC) provides wireless communication features in illumination systems. One of the key applications is to recognize the user location by indoor illuminators such as light emitting diodes. For localization of individual receivers in these systems, we usually assume that receivers and transmitters are placed in parallel. However, it is difficult to satisfy this assumpt...
An analytical approach is presented to investigate the of chip shape-dependent bit error rate (BER) performance of direct sequence optical code division multiple access with cascaded erbium doped fiber amplifiers in presence of fiber optic group velocity dispersion and self phase modulation. In our analysis, super-Gaussian and Hyperbolic-Secant shaped optical orthogonal codes are employed as ad...
Orthogonal frequency division multiplexing (OFDM) is an attractive modulation format that recently received a lot of attention in the fiber-optic community. The main advantage of optical OFDM is that it can cope with virtually unlimited amount of inter symbol interference (ISI). In high-speed optical transmission systems, ISI is caused for instance by chromatic dispersion and it is serious issu...
We report on the development of a highly sensitive optical receiver for heterodyne IR spectroscopy at the communication wavelength of 1.5 μm (200 THz) by use of a superconducting hot-electron bolometer. The results are important for the resolution of narrow spectral molecular lines in the near-IR range for the study of astronomical objects, as well as for quantum optical tomography and fiber-op...
A new detector for optical code-division multipleaccess (CDMA) communication systems is proposed. This detector is called the chip-level receiver. Both ON–OFF keying (OOK) and pulse-position modulation (PPM) schemes, that utilize this receiver, are investigated in this paper. For OOK, an exact bit error rate is evaluated taking into account the effect of both multiple-user interference and rece...
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