基于物理层子信道的单频网组网优化方法

Optimization Method of Single Frequency Network Based on Subchannels of Physical Layer

针对利用物理层子信道传输多种业务的地面数字电视单频网,提出了一种基于叠加编码调制的单频网优化方法。该方法对子信道的资源分配方式寻优,并通过启发式算法联合优化基站参数,综合考虑多种业务需求,在保证公共业务覆盖要求的同时提升本地业务的接收效果,对充分利用信道资源、减少单频网分析设计周期具有重要意义。

In this paper, an optimization method for the single frequency network in digital terrestrial television broadcasting system using subchannels of physical layer is proposed to provide several services based on superposition coding. The proposed method optimizes the allocation scheme of subehannels as well as parameters of the transmitters through heuristic algorithm. The simulation result indicates that this method can improve the reception of local services while still ensuring the requirements of global service, being of great importance in the full use of channel resource and reducing the computation complexity.