Channel equalizer performance analysis for Hybrid 3DTV in ATSC 3.0 standard
Recently, next generation broadcasting standardization has being conducted to transmit UHDTV contents. In this paper, an equalizer using least square estimation is designed and reception performance is analyzed for Hybrid 3DTV transceiver system. Equalizer structure for Hybrid 3DTV is designed by referring to ATSC 3.0 PHY layer. Hybrid 3DTV uses time division multiplexing for transmitting two physical layer pipes. The equalizer performance is simulated on Pedestrian Indoor channel which has long echoes. Simulation result shows that equalizer performance for Hybrid 3DTV is improved about 5 dB.
Comparative Performance Analysis of Training Sequences in Equalization
During the last decade we have experienced an increasing demand for wireless communication systems, that require the implementation of different functions, including equalization, to establish a reliable connection between nodes of the network. The correlation and statistical properties of the training sequences have been exploited in wireless systems in the past, however there are few studies that compare the impact of these sequences on the efficacy of the equalization process where they are implemented. Our experimental design considers five well known training sequences of the same length, including Barker, Willard, Neuman-Huffman, a Random binary sequence, and the Zadoff-Chu (ZC) code, and a new proposed sequence. The simulation results show that Random code is the best performing training sequence, especially when it is used in environments with strong levels of inter-symbol interference (ISI), ZC performs better for conditions with lower ISI and our proposed sequence named EoP performs in second place for any ISI level.
Comparison of the non-rotated and rotated constellations used in DVB-T2 standard
This paper deals with the comparison and performance of the non-rotated and rotated constellations, which are used in the DVB-T2 (Second Generation Digital Terrestrial Television Broadcasting) standard. Rotated constellation is one of the main innovations in DVB-T2 system configuration and should improve performance in frequency selective channels. For the determination of differences between the techniques of non-rotated and rotated constellations, a Gaussian (reference) and 0 dB Echo channel models were used. Simulation results of the BER (Bit Error Ratio) before and after LDPC decoding for both types of constellations were obtained and compared. An application for analysis and simulation of different constellation techniques was developed in MATLAB. Finally, achieved results are evaluated and discussed.