无线数字化覆盖工程单频网中的多径效应干扰分析与消除

Analysis and Elimination of Multi-Path Interference in Wireless Digital Coverage Project Based on Single Frequency Network

广播电视无线数字化覆盖工程中,单频网组网方式下测试点存在多径效应干扰。通过分析保护间隔与多径信号时延差的关系、多径效应的电平差与同频保护率的关系,结合单频网覆盖范围内接收点的实际测试结果,降低多径效应的干扰,从而提高电视信号传输效率。

In the radio and television wireless digital coverage project,there is multi-path effect interference at the test point under the single-frequency network networking mode.By analyzing the relationship between the guard interval and the delay difference of multipath signals,the relationship between the level difference of the multipath effect and the protection ratio of the same frequency,combined with the actual test results of the receiving points within the coverage of the single frequency network,the interference of the multipath effect is reduced.Thereby,the transmission efficiency of the TV signal is improved.