Application of Novel Signal Processing Algorithms for the Detection and Minimization of Skywave Interfering Signals in Loran Receivers
| Document type: | Bookchapters |
|---|---|
| Peer reviewed: | Yes |
| Author(s): | Abbas Mohammed, David Last |
| Title: | Application of Novel Signal Processing Algorithms for the Detection and Minimization of Skywave Interfering Signals in Loran Receivers |
| Book: | Applied Signal and Image Processing: Multidisciplinary Advancements |
| Year: | 2011 |
| Pagination: | 28-44 |
| Editor: | Rami Qahwaji, Roger Green, Evor Hines |
| ISBN: | 978-1-60960-477-6 |
| Publisher: | IGI Global |
| City: | Hershey |
| URI/DOI: | 10.4018/978-1-60960-477-6.ch002 |
| Organization: | Blekinge Institute of Technology |
| Department: | School of Engineering - Dept. of Electrical Engineering (Sektionen för ingenjörsvetenskap - Avd. för elektroteknik) School of Engineering S-371 79 Karlskrona +46 455 38 50 00 http://www.bth.se/ing/ |
| Authors e-mail: | amo@bth.se |
| Language: | English |
| Abstract: | Skywave interference commonly affects Loran receivers’ performance. Traditional skywave rejectionmethods that use fixed, worst-case, sample timing are far from optimal. This chapter reports on novel signal processing techniques for measuring in real-time the delay and strength of the varying skywave components of a Loran signal relative to the groundwave pulse. The merits and limitations of these techniques will be discussed. Their effectiveness will be assessed by theoretical analysis, computer simulations under a range of realistic conditions, and by testing using off-air signals. A prototype Loran system employing the proposed techniques is also presented. This work establishes a basis on which to design a Loran receiver capable of adjusting its sampling point adaptively to the optimal value in a constantly-changing skywave environment. Such receivers promise to improve significantly the accuracy and reliability of positioning under adverse operational conditions. |
| Subject: | Telecommunications\General Signal Processing\General |
| Keywords: | Loran, Navigation, Skywave, Receivers |
