Full text of article: Russian language.

 PDF

Abstract:
This research studies in which way the interference that occurs in Single-Frequency Networks for Digital Television broadcasting affects the reception quality in the overlapping service zones of transmitters. The article contains qualitative and quantitative evaluation of the effectiveness of the interference distortion compensation in the receiver’s demodulator. The results were obtained using CADs VSS Applied Wave Research and ADS Agilent Technologies and allow us to evaluate a limiting value of the signal-to-echo-signal ratio for a given signal-to-noise ratio that provides the network operability.
The DVB network operability in the presence of transmitter clocking depends on the stability margin, which is defined by the permissible value of a bit error rate (BER) within a threshold. From the obtained results it follows that the interference-impact threshold corresponds to the BER equal to 2 × 10-4. For below-threshold BER values, the reception becomes almost error-free due to the use of a Reed-Solomon decoder. Codec replacement in the second-generation DVB networks resulted in a significantly decreased BER threshold value to 10-2 – 10-3, which allowed the data transfer rate to be increased while keeping the stability margin in terms of the bit error rate.
The developed method for studying the performance of digital broadcasting networks and systems allows causes behind the increase of BER to be identified in practice based on spectra and signal constellations diagrams, also enabling the comparison of various algorithms for the assessment of data channel performance and digital television signal processing in terms of the effective suppression of interference distortions.

Keywords:
Single frequency network, TV broadcasting, bit error eate, interference, distortions, TV signal processing.

Citation:
Karyakin VL. Assessment of digital television signal processing for correction of interference distortions in single-frequency DVB networks. Computer Optics 2017; 41(2): P. 276-283. DOI: 10.18287/2412-6179-2017-41-2-276-283.

References:

1. Karyakin VL. Digital TV: Textbook for High Schools, 2nd ed, revised and enlarged [In Russian]. Moscow: "Solon-Press" Publisher; 2013. ISBN: 5-91359-110-4.
2. Karyakin VL, Karyakin DV, Morozova LA. Methods ensure synchronous operation of TV transmitters of DVB-T2 and DVB-T SFN network. Telecommunications and Radio Engineering 2016; 4: 46-49.
3. Karyakin VL, Karyakin DV, Morozova LA. Evaluation of the quality of a single frequency network for digital broadcasting via echo-chart. Proceedings SWorld 2015; 2(39:4): 18-23.
4. ETSI TS 101 191 V1.4.1 (2004-06) Technical Specification Digital Video Broadcasting (DVB); DVB mega-frame for Single Frequency Network (SFN) synchronization.
5. An enhanced version of CAD ADS from Agilent Technologies in 2014 significantly increased the efficiency and productivity of the design. Source: <http://www.ki­pis.ru/news/companies-news/index.php?news=799238>.
6. AWR Visual System Simulator – system design of telecommunications equipment at the functional level. Source: <http://www.eurointech.ru/vss>.
7. ETSI TR 101 290 V1.3.1 (2014-07). Digital Video Broadcasting (DVB); Measurement guidelines for DVB systems.
8. Digital Transmission: Carrier-to-Noise Ratio, Signal-to-Noise Ratio, and Modulation Error Ratio. Source: <http://www.broadcom.com/collateral/wp/CMTS-WP101-R.pdf>.

---

© 2009, IPSI RAS
Institution of Russian Academy of Sciences, Image Processing Systems Institute of RAS, Russia, 443001, Samara, Molodogvardeyskaya Street 151; E-mail: journal@computeroptics.ru; Phones: +7 (846) 332-56-22, Fax: +7 (846) 332-56-20