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Book ChapterDOI

Channel Power Estimation for DVBRCS to DVBS2 Onboard DSP Payload

TL;DR: A comparison of the parametric and nonparametric approaches is done to find the best suitable algorithm for onboard application and result of the performance of the selected periodogram method is reported under noisy and no noise condition.
Abstract: In multicarrier scenarios it is important to maintain the signals power in the specified dynamic range for the QOS. Further in Digital Video Broadcasting-S2 (DVBS2) the variable coding and modulations are selected based on the individual channel power. The paper describes the power estimation algorithm used for monitoring of up linking signal power for onboard satellite payload under such scenarios. In this paper a comparison of the parametric and nonparametric approaches is done to find the best suitable algorithm for onboard application. The performance of each algorithm is verified and compared. The periodogram method is finalize due to low complexity. Finally, result of the performance of the selected periodogram method is reported under noisy and no noise condition.
References
More filters
Journal ArticleDOI
Peter D. Welch1
TL;DR: In this article, the use of the fast Fourier transform in power spectrum analysis is described, and the method involves sectioning the record and averaging modified periodograms of the sections.
Abstract: The use of the fast Fourier transform in power spectrum analysis is described. Principal advantages of this method are a reduction in the number of computations and in required core storage, and convenient application in nonstationarity tests. The method involves sectioning the record and averaging modified periodograms of the sections.

9,705 citations

Book
19 Apr 1996
TL;DR: The main thrust is to provide students with a solid understanding of a number of important and related advanced topics in digital signal processing such as Wiener filters, power spectrum estimation, signal modeling and adaptive filtering.
Abstract: From the Publisher: The main thrust is to provide students with a solid understanding of a number of important and related advanced topics in digital signal processing such as Wiener filters, power spectrum estimation, signal modeling and adaptive filtering. Scores of worked examples illustrate fine points, compare techniques and algorithms and facilitate comprehension of fundamental concepts. Also features an abundance of interesting and challenging problems at the end of every chapter.

2,549 citations

Journal ArticleDOI
TL;DR: Most often, small periodic variations are hidden behind irregular fluctuations, and their investigation then becomes a matter of considerable difficulty.
Abstract: 1. Obvious and hidden periodicities. A variable quantity may show periodic changes which become obvious as soon as a sufficient record has been obtained; such are the semi-diurnal changes of the tides, or the eleven years recurrence of sunspot maxima. We may call these obvious periodicities. Most often, however, small periodic variations are hidden behind irregular fluctuations, and their investigation then becomes a matter of considerable difficulty.

542 citations

Journal ArticleDOI
01 May 1948-Nature
TL;DR: In this paper, the smoothing of periodograms obtained from autoregressive or other time-series with continuous spectra is equivalent to considering the first few sample autocorrelations.
Abstract: IN his review1 of M. G. Kendall‘s brochure2 on oscillatory time-series, David G. Kendall made the pertinent observation that the smoothing of periodograms obtained from autoregressive or other time-series with continuous spectra is equivalent to considering the first few sample autocorrelations. I had arrived at a similar conclusion, though possibly by an alternative route, having noticed that the averaging of periodograms obtained from contiguous lengths of series is approximately equivalent to a truncation of the correlogram at a point represented by the length of the subseries. From preliminary computation already made on M. G. Kendall‘s artificial series to test out this smoothing device, it appears promising.

378 citations

Journal ArticleDOI
TL;DR: This article shows how the ACM introduction in the satellite downlink enables greatly enhanced system performance but also has a profound impact on the way the system and some of the key system components are designed.
Abstract: Point-to-point multibeam satellite systems based on the DVB-S standard are currently designed for link closure in the worst-case propagation and location conditions The DVB-S standard, conceived for broadcasting applications, considers a fixed coding rate and modulation format that are selected according to the assumed coverage and availability requirements This approach implies the occurrence of high margins in the majority of the cases, when interference and propagation conditions allow for higher signal-to-noise-plus-interference ratio The adaptive coding and modulation (ACM) introduction in the new DVB-S2 standard for the interactive service profile opens up a number of appealing opportunities for the design and development of satellite broadband networks In this article we show how the ACM introduction in the satellite downlink enables greatly enhanced system performance but also has a profound impact on the way the system and some of the key system components are designed

46 citations