The mechanism research and field testing of SFN signal delay adjustment in Shanghai

This paper presents a mechanism of SFN signal delay adjustment by taking the construction of CTTB SFN in Shanghai as the example. We found the signal quality depends more on the relative delay in the multi-path alter sharply areas by test in a practical way. We predicted the areas which should been critically protected by using the HATA model, considering the vertical transmit antenna gain pattern. We accomplished the SFN construction by taking the delay adjustment mechanism and finished the measurement of the coverage level, signal-noise-rate and reception success rate.