Many distinct fields of application of the theory of cyclostationary time-series analysis are identified on the Home Page, and the number of research papers found by a carefully performed web search is used there as a metric for the apparent level of activity involving cyclostationarity in each of these fields. However, specific research papers are not singled out there as worthy examples. In contrast, the purpose of the present page is to direct readers to a single source where many fine examples are cited.
The research required for this section was recently completed and reported in a new book on cyclostationarity. This book, entitled Cyclostationary Processes and Time Series: Theory, Applications, and Generalizations, is the most comprehensive and up-to-date treatment of the entire field of cyclostationarity (including its generalizations), and it is written by today’s foremost developer and chronicler of advances in cyclostationarity. Chapters 9 and 10 include a survey of fields of application of the cyclostationarity paradigm, and identify on the order of 100 distinct applications and cite about 500 published papers addressing these applications. A sampling of the application areas identified is given here and includes the pages where this material can be found.
Rather than including here in this section of the website material that would be highly redundant with this up-to-date book, readers are referred to this book via the link [B2].
One additional source of applications, which was not available to the author of the above book, is reproduced below and provides an in-depth survey of early work on application of cyclostationarity theory and method to the specialized field of signal interception. This survey was written 5 years after the publication of the enabling book [BK2].
In the 2-decade period following the brief period covered by the above 1992 overview report, the WCM’s R&D company SSPI continued its development of theory and method for signals intelligence until that company closed following the sale of its intellectual property to Lockheed Martin in 2011. Very little of the results of that R&D has been published and it remains, another decade later, classified by the US government. Nevertheless, applications of cyclostationarity outside the field of signals intelligence during those thirty years has seen tremendous growth. For the sake of completeness, this page is concluded with a presentation of all four tables of results from the internet search that appeared in the original publication [JP65] from which the single table presented herein on the Home Page was taken. These search results establish the fact that cyclostationarity concepts, theory, and method have permeated essentially every field of science and engineering, as predicted by the WCM upon completion of his seminal book [BK2] published in 1987. From this survey data, one must conclude that the subject of this website has—since the publication of [BK2]—become a major new subfield, within the classical field of statistical time-series analysis. The importance of this subfield is not dependent on technology and will only increase in importance in the foreseeable future. This fact justifies this educational website.
The web search results shown below were obtained using Google Scholar. This search was based on 45 nearly-distinct applications areas in science and engineering, and the search terms were chosen to yield only results involving exploitation of cyclicity in time-series data. By “nearly distinct”, it is meant that the search terms were also selected to minimize redundancy (multiple search application areas producing the same “hits”). As shown in Table 1, the search found about 136 thousand published research papers. Additional web search results are shown in Table 2. This search was based on 24 partially redundant general subject areas and it found 238 thousand published research papers.
To complement the historical perspective on applications of cyclostationarity provided in the 1992 Technical Report included on this page just prior to the above four tables, two documents prepared just following the 1992 Workshop are included below. The first identifies about half of the research laboratories that sent representatives to participate in this workshop and the second is a 1992 press release prepared by the University of California, Davis.