Agilent Testing DVB-T and DVB-T2 Receivers - Application Note 5991-1869EN c20130202 [8] free download

File name Testing DVB-T and DVB-T2 Receivers - Application Note 5991-1869EN c20130202 [8].pdf

DVB-T and DVB-T2 Receiver Test Challenges Application Note Introduction Over the past 10 years, DVB-T has become the most widely adopted and deployed terrestrial digital video standard. It is now well established and the prices of DVB receivers have dropped over time as the technology has matured. Due to its successful development and deployment, DVB-T has come to serve as a sort of benchmark for the development of other terrestrial digital video standards. Due to increasing scarcity of spectrum and requirements for high transmission capacity in recent years, an updated standard with more spectral efficiency is required to replace DVB-T. The DVB-T2 system is capable of meeting these requirements, due to its increased capacity, robustness, and the ability to reuse existing reception antennas. The regions which previously adopted DVB-T sys- tems, primarily countries in Europe and Asia, will be migrating to DVB-T2, while many new countries and regions began the process of adopting DVB-T2 directly since the first version of the standard was published in 2009. With the advanced technologies used in DVB-T2 to achieve high performance, new measurement challenges are facing both transmitter and receiver develop- ers. In this application note, we will focus on the measurement challenges for developers of receivers such as set-top-boxes. Overview of DVB-T and DVB-T2 Systems Both DVB-T and DVB-T2 use the OFDM modulation DVB-T2 is an ideal choice for the replacement of the DVB-T scheme, which provides various options for bandwidth, system because a number of the elements of the DVB-T2 modulation, FEC (forward error correction) rates, number of system align with the system requirements put forth by carriers, and guard intervals, making it flexible enough to the standards bodies. The key requirements and the cor- meet the needs of different transmission environments and responding DVB-T2 technology components are listed in operators. Table 1. Table 1. Key requirements of DVB-T replacement system and corresponding DVB-T2 system components Key requirements of the DVB-T replacement system Key DVB-T2 technology components Provide a minimum of a 30% capacity increase over DVB-T