DTMB系统中频域交织的设计与实现

Design and Implementation of Frequency Interleaving in DTMB System

提出一种DTMB系统的频域交织方法,利用了插入位置集合的固有特性,使用正则有符号数CSD运算降低了运算量。实验表明,该频域交织器设计合理,可有效降低逻辑资源,最重要的是省去了传统查表法的存储器消耗。

This article proposed a direct frequency interleaving method in DTMB system and utilized the inherent characteristic of the set of inserted positions.This method effectively reduces the computational complexity by using canonical signed digit（CSD） operation.Experimental results show that this frequency interleaver is well designed and the hardware logic cells can be greatly decreased.Most of all,the design requires no longer memory consumption which is evitable in the conventional lookup table method.