Analysis of NMR Spectrometer Receiver Noise Figure
نویسندگان
چکیده
منابع مشابه
Revisiting the Noise Figure Design Metric for Digital Communication Receiver
Noise figure is a commonly used system parameter that quantifies the degradation in the signal-to-noise ratio (SNR) as the signal passes through a receiving system. Because of the difficulty in defining the SNR, NF depends on how the SNR is computed and the underlying assumptions that are made. Existing NF measures and their shortcomings are explained. A new NF suitable for digital communicatio...
متن کاملTuned limiter for receiver amplifier in a fast-recovery pulsed NMR spectrometer.
A simple tuned limiter is described which limits the rf voltage amplitude at the input of the receiver amplifier of a pulsed NMR spectrometer. This device prevents overload of the receiver amplifier during the high-power rf pulse and thereby allows fast recovery of the spectrometer following the pulse. When used with Avantek unit amplifiers at 24 MHz, a recovery time of 2.5 mus is achieved.
متن کاملAnalysis and Investigation of Noise Figure of Fiber Raman Amplifier
Raman amplifiers are widely used for high capacity long haul communication systems. One of the main reason for which it can be used is its improved noise figure. In this paper noise figure of Raman amplifiers is studied and analysed for different pumping schemes. The main sources of noise and their effects on the noise figure are discussed and the methods to reduce the noise figure are proposed.
متن کاملNoise Figure Analysis Of Distributed Fibre Raman Amplifier
Fibre Raman amplifiers are being deployed in many new long-haul and ultra long-haul fibre-optic transmission systems, making them the first and most widely commercialized nonlinear optical devices in telecommunications. One of the main reasons for this is their improved noise figure and reduced nonlinear penalty of fibre systems hence allowing for longer amplifier spans. In this paper, we have ...
متن کاملStatistical Analysis of Accuracy in Noise Figure Measurements
There is a growing trend to integrate noise figure measurement capabilities in microwave instruments originally devoted to other general purpose measurements as Vector Network Analyzers or Spectrum Analyzers. This opens up new possibilities to take into account vector corrections (at least in the case of VNA), or even to consider other techniques (such as cold-source) for computing the noise fi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Mathematical Problems in Engineering
سال: 2019
ISSN: 1024-123X,1563-5147
DOI: 10.1155/2019/1083706