A Comparison of 64-QAM and 16-QAM DVB-T under Long Echo Delay Multipath Conditions.

In 2002, the commercial digital terrestrial television service in the United Kingdom had a technological revival Since its first broadcast in 1998, there have been a number of reception issues concerning Digital Video Broadcasting - Terrestrial (DVB-T). As a result, the modulation method has changed in order to maximize the coverage and minimize errors. The consequence of changing the modulation method to a more robust system is that the overall throughput must suffer. Therefore, a trade-off between throughput and robustness must be made. This paper will detail the results of experiments performed to ascertain the justification of changing the modulation method in a DVB-T compliant system from 64-QAM to 16- QAM when transmitted at Radio Frequencies (RF) when subjected to multipath with long path delays as is normal in a Single Frequency Network (SFN). [ABSTRACT FROM AUTHOR]