Download Autonomous Software-Defined Radio Receivers for Deep Space by J. Hamkins, et al., PDF

By J. Hamkins, et al.,

Show description

Read Online or Download Autonomous Software-Defined Radio Receivers for Deep Space Applns PDF

Similar radio books

Programme Making for Radio (Media Skills)

Programme Making for Radio deals trainee radio broadcasters and their teachers centred useful guidance to the pro thoughts utilized to the making of radio indicates, explaining how particular radio programmes are made and the conventions and strategies required to provide them. This e-book describes how and why those equipment are utilized by using a behind-the-scenes glimpse at operating practices and methods utilized in the undefined.

The Radio Eye: Cinema in the North Atlantic, 1958-1988

The Radio Eye: Cinema within the North Atlantic, 1958–1988, examines the way media experiments in Quebec, Newfoundland, the Faroe Islands, and the Irish-Gaelic-speaking groups of eire use movie, video, and tv to recommend for marginalized groups and infrequently for “smaller languages.

Additional resources for Autonomous Software-Defined Radio Receivers for Deep Space Applns

Example text

2-7. NΦ is the number of bits used in the integration process (a multiple of 1000 bits), and Si denotes error count for each code phase, Φi . If the difference in the error counts is sufficiently large, |S0 − S1 | ≥ α0 (α0 is a pre-determined threshold between 0 and 255) and the smallest of the two error counts, SΦ min , is less than a second pre-determined threshold α1 (between 0 and 2048), then the node phase is set to the phase associated with the minimum error count and acquisition is completed.

This monograph derives architectures for each of these from scratch, in most cases by formulating the ML criterion for the estimator and attempting to solve it analytically. This led to excellent solutions for modulation classification, SNR estimation, and frequency tracking. In some other cases, the ML solution was not tractable, and promising ad hoc schemes were identified. We briefly summarize the status of the design and analysis of some of these estimators below. 1 Carrier Phase Tracking In autonomous radio operation, it is desired that the receiver contain a carriersynchronization structure that is generic in the sense that it is capable of tracking the carrier phase independently of the modulation.

If the correct codeword is not obtained, then the bit likelihoods can be used to generate a soft data-wipe of the received signal. This makes the signal more like a continuous wave (CW) signal, which will allow the SNR, frequency, and phase estimates to be substantially improved, which will in turn produce better inputs for the decoder to operate on in its second iteration. This behavior of coupled or iterative estimation has been observed before [16,18]. 5 A Demonstration Testbed NASA is developing a software demonstration testbed of the autonomous radio described in this chapter.

Download PDF sample

Autonomous Software-Defined Radio Receivers for Deep Space Applns by J. Hamkins, et al.,

by Edward

Rated 4.64 of 5 – based on 4 votes