Download PDF by David H. Rogstad, Alexander Mileant, Timothy T. Pham: Antenna arraying techiques in the deep space network

By David H. Rogstad, Alexander Mileant, Timothy T. Pham

ISBN-10: 0471467995

ISBN-13: 9780471467991

An creation to antenna Arraying within the Deep area community Antenna arraying is the combining of the output from numerous antennas with a view to increase the signal-to-noise ratio (SNR) of the obtained sign. Now applied on the Goldstone complicated and different Deep house community (DSN) in another country amenities, antenna arraying offers versatile use of a number of antennas to extend info charges and has enabled NASA's DSN to increase the missions of a few spacecraft past their deliberate lifetimes. Antenna Arraying concepts within the Deep area community introduces the improvement and use of antenna arraying because it is carried out within the DSN. Drawing at the paintings of scientists at JPL, this well timed quantity summarizes the advance of antenna arraying and its historic heritage; describes key strategies and methods; analyzes and compares numerous tools of arraying; discusses numerous correlation innovations used for acquiring the mixed weights; provides the result of a number of arraying experiments; and indicates instructions for destiny paintings. a tremendous contribution to the medical literature, Antenna Arraying options within the Deep house community * was once commissioned through the JPL Deep house Communications and Navigation structures (DESCANSO) middle of Excellence * Highlights many NASA-funded technical contributions bearing on deep area communications structures * is part of the distinguished JPL Deep area Communications and Navigation sequence The Deep house Communications and Navigation sequence is authored by way of scientists and engineers with huge event in astronautics, communications, and comparable fields. It lays the root for innovation within the parts of deep area navigation and communications by means of disseminating state of the art wisdom in key applied sciences.

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Figure 2-4. Package photos of an 8c Xeon Sandy Bridge EP (right) and 8c Atom Avoton (left) Multiple dies can be included in a single package. This is called a multi-chip package (MCP). MCPs can provide a cost-effective way for increasing the capabilities of a product. One can connect two identical dies (commonly used to increase core count), or different dies (such as a chipset and a CPU). Connecting two devices inside of a package is denser, lower power, and lower latency than connecting two separate packages.

On products with very low levels of leakage power, ITD effects could result in increased net power at low temperatures. Power-Saving Techniques Now that we have looked at the basics of where power goes in the data center, we will investigate some of the high-level techniques for achieving power efficiency. There are two conceptual ways to save power: • Turn it off. • Turn it down. Different components in the data center and CPU have different techniques for performing each of these two operations.

CPU Power Breakdown The CPU power can conceptually be broken into • The logic power (executing the instructions) • The I/O power (connecting the CPU to the outside world) These can be broken down further as described in the following sections. 34 Chapter 2 ■ CPU Power Management Logic Power When the logic in the CPU transitions between 0 and 1, power is consumed. The transistors are effectively each little tiny capacitors that are charging and discharging (and expending power in the process). This is referred to as the active power of the CPU.

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Antenna arraying techiques in the deep space network by David H. Rogstad, Alexander Mileant, Timothy T. Pham


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