Agilent Addressing the Challenges of Deploying Single Frequency Networks DVB-T & DVB-T2 - Application Note 5 free download

File name Addressing the Challenges of Deploying Single Frequency Networks DVB-T & DVB-T2 - Application Note 5

Keysight Technologies Addressing the Challenges of Deploying Single Frequency Networks DVB-T & DVB-T2 Application Note Contents Introduction... 3 SFN Echo Scenarios ... 4 Post-echo scenario ... 4 Pre-echo scenario ... 4 Pre-echoes and post-echoes ... 5 Echo mask requirements ... 5 SFN Measurements... 6 Echo measurement with delay within the GI ... 7 Extending the echo delay measurement range ... 7 Keysight's SFN Measurement Solution ... 8 X-Series signal analyzers and the N/W6153A DVB-T/H/T2 measurement application ... 8 Test configuration and system parameters... 10 Post-echo scenario ... 10 Pre-echo scenario ... 11 Pre-echo and post-echo scenario ... 12 Scenario with long delay echoes ... 13 SFN measurements for DVB-T2 MISO systems ... 15 Post-echo scenario ... 16 Pre-echo scenario ... 17 Conclusion... 18 References ... 18 2 Introduction Single Frequency Network (SFN) television broadcasting systems have been widely deployed, especially for OFDM based systems like DVB-T and DVB-T2 [1][2], DTMB, and ISDB-T, due to their high frequency efficiency and simple frequency planning. However, building a successful SFN system is challenging because it requires precise transmitter deployment in order to ensure good coverage. In an SFN, two or more transmitters radiate the same signal on the same frequency simultaneously and repeaters are used to ensure good signal cover- age. The receiver is thus likely to receive multiple echoes from many of these transmitters. Echo scenarios in SFN systems in t