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.
Measurement of the DVB-T2 with 256QAM rotated constellation and 32K extended mode in relation to variable pilot patterns
Second generation digital terrestrial television broadcasting, in this paper represented by the DVB-T2 standard, has a more flexible approach of the system parameters by defining up to eight pilot patterns. Selection of the best pattern and related DVB-T2 system parameters can be adjusted in a real broadcasting network based on operator demands. This paper deals with exploring of the DVB-T2 system performance in different transmission channels and evaluates its dependence on the type of the pilot pattern used towards real DVB-T2 terrestrial network implementation. A fixed reception scenario of broadband multimedia system services is considered with HDTV video image quality for a very convenient 256QAM rotated constellation and 32K extended mode. Several terrestrial channel models are also respected, like reference Gaussian channel and standardized Ricean and Rayleigh fixed fading channels with 20 echo paths and variable delays. Dependences of the bit error rates before and after a highly efficient LDPC decoding and consequent modulation error on the carrier-to-noise ratio for different pilot patterns are the main results of our work. Finally, our experimental results are compared with the simulated and theoretical values from the ETSI standard to be sure about their validity.
Frequency selective surface design for blinds applications
In this paper, the reconfigurable blind structure with frequency selective surfaces(FSS) for the building applications are presented. Frequency transmission characteristics for different angles of the proposed blind-FSSs are investigated and verified through simulation and measurement. The simulation results show that we can implement the reconfigurable blind-FSS for multiband wireless applications. To verify the proposed paper, two kinds of blind-FSSs, crossed dipole FSS and circular ring FSS are fabricated and measurements are performed for different angles. The proposed structure in this paper which is very simple, can be easily applied to any planar surface for wireless security applications at low cost.