Download e-book for kindle: Antenna Arraying Techniques in the Deep Space Network by David H. Rogstad, Alexander Mileant, Timothy T. Pham

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 a number of antennas in an effort to enhance the signal-to-noise ratio (SNR) of the acquired sign. Now applied on the Goldstone complicated and different Deep house community (DSN) out of the country amenities, antenna arraying presents versatile use of a number of antennas to extend information charges and has enabled NASA's DSN to increase the missions of a few spacecraft past their deliberate lifetimes. Antenna Arraying strategies within the Deep house community introduces the improvement and use of antenna arraying because it is applied within the DSN. Drawing at the paintings of scientists at JPL, this well timed quantity summarizes the advance of antenna arraying and its historic historical past; describes key recommendations and strategies; analyzes and compares numerous tools of arraying; discusses numerous correlation strategies used for acquiring the mixed weights; provides the result of a number of arraying experiments; and indicates instructions for destiny paintings. a major contribution to the clinical literature, Antenna Arraying thoughts within the Deep house community * was once commissioned by means of the JPL Deep house Communications and Navigation platforms (DESCANSO) heart of Excellence * Highlights many NASA-funded technical contributions referring to deep area communications platforms * is part of the distinguished JPL Deep area Communications and Navigation sequence The Deep house Communications and Navigation sequence is authored through scientists and engineers with vast adventure in astronautics, communications, and similar fields. It lays the root for innovation within the components of deep area navigation and communications by means of disseminating state of the art wisdom in key applied sciences.

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It can be seen that the noise temperature of the amplifier varies almost linearly with the physical temperature. 44 K/K, in the region where the physical temperature is >150 K. Figure 3-4 shows HEMT amplifier noise performance versus frequency for three common cooling configurations. The first is at room temperature, the second is cooled to approximately –50 deg C with a Peltier-effect cooler, and the third uses a closed-cycle helium refrigerator capable of lowering the device temperature to 15 K.

5-3. Symbol SNR degradation in the presence of subcarrier and symbol phase jitter. Single-Receiver Performance 39 where Ik (⋅) denotes the modified Bessel function of order k and ρc is the 2 2 , and Csy , versus the loop carrier-loop SNR. The symbol degradations, Cc2 , Csc SNR are depicted in Figs. 5-2 and 5-3. Figure 5-3 also depicts the degradation, assuming φ sc and φ sy are either Gaussian or Tikhonov distributed. It is clear from this figure that both densities provide close results; therefore, the Gaussian assumption for the subcarrier and symbol phase errors will be utilized from here on.

5-3. Symbol SNR degradation in the presence of subcarrier and symbol phase jitter. Single-Receiver Performance 39 where Ik (⋅) denotes the modified Bessel function of order k and ρc is the 2 2 , and Csy , versus the loop carrier-loop SNR. The symbol degradations, Cc2 , Csc SNR are depicted in Figs. 5-2 and 5-3. Figure 5-3 also depicts the degradation, assuming φ sc and φ sy are either Gaussian or Tikhonov distributed. It is clear from this figure that both densities provide close results; therefore, the Gaussian assumption for the subcarrier and symbol phase errors will be utilized from here on.

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Antenna Arraying Techniques in the Deep Space Network by David H. Rogstad, Alexander Mileant, Timothy T. Pham


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