Coherent detectors

Coherent neutrino scattering in dark matter detectors

Performance Comparison of Soqpsk Detectors: Coherent vs. Noncoherent

Shaped Offset Quadrature Shift Keying (SOQPSK) is a spectrally efficient modulation that has been promoted in the airborne telemetry community as a more spectrally efficient alternative for legacy PCM/FM. First generation demodulators for SOQPSK use coherent detectors which achieve good bit error rates at the expense of long synchronization times. This paper examines the performance of a noncoh...

X-ray detectors at the Linac Coherent Light Source

Free-electron lasers (FELs) present new challenges for camera development compared with conventional light sources. At SLAC a variety of technologies are being used to match the demands of the Linac Coherent Light Source (LCLS) and to support a wide range of scientific applications. In this paper an overview of X-ray detector design requirements at FELs is presented and the various cameras in u...

Decision Feedback Coherent Detectors for DQPSK in Fading Channels

Novel coherent detectors for DQPSK and π/4DQPSK on fading channels are presented. The phase reference for the decision device is derived by mean square error estimation of the fading process. A finite impulse response filter is used for this purpose. The decision device is a traditional coherent detector. Both 1 and 2 stage detectors are considered. The proposed detectors show significantly bet...

Toward coherent neutrino detection using low-background micropattern gas detectors

The detection of low energy neutrinos ( few tens of MeV) via coherent nuclear scattering remains a holy grail of sorts in neutrino physics. This uncontroversial mode of interaction is expected to profit from a sizeable increase in cross section proportional to neutron number squared in the target nucleus, an advantageous feature in view of the small probability of interaction via all other chan...