Read e-book online An Introduction to Signal Detection and Estimation (Springer PDF

By H. Vincent Poor

ISBN-10: 0387941738

ISBN-13: 9780387941738

Crucial heritage studying for engineers and scientists operating in such fields as communications, keep watch over, sign, and photo processing, radar and sonar, radio astronomy, seismology, distant sensing, and instrumentation. The ebook can be utilized as a textbook for a unmarried direction, in addition to a mixture of an introductory and a complicated path, or maybe for 2 separate classes, one in sign detection, the opposite in estimation.

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Extra resources for An Introduction to Signal Detection and Estimation (Springer Texts in Electrical Engineering)

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The electromagnetic actuator then produces force (F), which is proportional to the input current. 4 illustrates the process. Of the actuator’s performance factors mentioned in the previous section, resolution, maximum force, and bandwidth are partly dependent on the amplifier. The noise in the electric-signal output affects the actuator’s resolution, especially if it is within the actuator’s bandwidth. For example, if the actuator’s bandwidth is 1 kHz, noise with a frequency of 100 kHz affects the overall system much less than noise with a frequency of 10 Hz.

Bandwidth. An indirect measurement of how fast the actuator can react and follow the commanded trajectory, bandwidth is given in units of Hertz. Although motions in an FT spectrometer are relatively slow (< 100 Hz), a large bandwidth is desirable to be able to compensate for disturbances. Since the motion system is under servo-control (or it should be), it tries to correct any positional error that arises. However, it is not able to do so efficiently if the actuator cannot respond fast enough. 2 Driver and Amplifier The main function of the driver, or the amplifier unit, is to convert the low-power electrical signal from the motion controller to a higher power signal to drive the actuator.

Position sensor: a linear optical encoder with a resolution of 31 picometer (after interpolation). 25 mm. stiffness in a linear ball-bearing stage depends on the magnitude of the preload1 (adjustable by the user or set by the manufacturer). Higher preload increases the stiffness, while it decreases the resolution because of the higher friction between the rolling elements. 3 Discussion on bearings Most of the “high-end” FT spectrometers employ air-bearing stages. High-end instruments generally refer to those that provide high-spectral resolution, fast scanning, and high-spectral SNR.

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An Introduction to Signal Detection and Estimation (Springer Texts in Electrical Engineering) by H. Vincent Poor

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