Blind Signal Processing of digital TV Standards for Passive Sensing
Volker Winkler, Steffen Lutz · 2022
For digital TV transmission many different standards are used worldwide and the complexity of these standards has also increased significantly. Most standards are based on orthogonal frequency division multiplex where several new features have been introduced. These features lead to the fact that symbols can't be reconstructed any more without using error correction or at all. This has been the motivation to investigate blind signal processing approaches without demodulation. Blind processing means that only a few parameters like the bandwidth are required and undesired peaks in the ambiguity function are suppressed by an adaptive filter in contrast to demodulation with the compensation of pilot symbol powers, where it is necessary to perform synchronization, to extract the information of frame start symbols and to estimate the channel transfer function over time and frequency as preliminary steps in most cases.