Study on the Influence of Delay Difference and Power Ratio on the Reception of Single Frequency Network Coverage Overlapping Area of Terrestrial Digital Television
Study on the Influence of Delay Difference and Power Ratio on the Reception of Single Frequency Network Coverage Overlapping Area of Terrestrial Digital Television
To ensure that the equipment in the overlapping area of the single frequency network can receive signals normally,one of the two conditions of anti-echo delay or terrestrial digital TV interference co-frequency protection rate needs to be met.Aiming at this problem,this paper uses the combination variable of time delay difference and power ratio as the matrix test point,and conducts a single frequency network networking experiment.The experimental results show that outside the theoretical condition area,there are still some sub-optimal condition areas,so that the equipment can receive signals normally.These findings provide more references for SFN network optimization and transmission parameter tuning.
关键词
单频网/重叠区/回波时延/同频保护率
Key words
Single frequency network/Overlapping area/Echo delay/Co-frequency protection rate
维普
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