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.
Analysis of Channel Equalization Techniques of ATSC Main and Mobile Transmission System
After introducing digital HDTVs, smart consumers now require new DTV services. ATSC has adapted 3DTV standard which is ATSC SC-MMH (Service Compatible 3DTV using Main and Mobile Hybrid delivery), and the 3DTV standard uses the ATSC M/H transmission system. Even though an 8-VSB frame has only 0.8% training sequence, an ATSC M/H frame has about 3.9% training sequence when the number of group is 8. So the longer training sequence of ATSC M/H can be used to improve the performance of channel equalization technique. This paper uses LMS-based channel equalization techniques, and compares the equalization performance of ATSC M/H transmission system with ATSC 8-VSB system. By the benefit of longer training sequence of ATSC M/H, the equalizer works well in Ricean channel of K = 0 dB.
A Recursive Trellis Decoder to A pproach The Shannon Capacity in ATSC DTV Receivers
The decoding structure of up-to-date ATSC DTV receivers is well optimized, and it seems that 14.6 dB is the unbreakable minimum SNR in the AWGN channel. In order to approach the Shannon capacity we propose a recursive trellis decoder which uses reliable feedback data obtained by an RS decoder. The performance enhancement of about 0.8 dB can be achieved.