摘要
数据位宽选择是硬件设计者必须要考虑的问题,其目的是在数据精度和资源消耗之间寻求折衷。针对数字下变频的硬件实现,为了对其数据位宽进行选择,通过仿真定量分析了数据位宽与数据精度、资源消耗的关系,并在给定数据精度限制的情况下,采用基于仿真的方法进行数据位宽选择,在研究了最优解的两种搜索方法后,又提出了一种新的搜索方法,均得到了满足要求的最优数据位宽。
Data bit-width selection is an issue that a hardware designer must consider, and the purpose of it is to find a tradeoff between data precision and resource consumption. Aiming at the hardware implementation of digital down-converter, in order to select its data bit-width, the relationship between data bit-width, data precision and resource consumption is quan- titatively analyzed by simulation, and under the condition of a given limit of data precision, data bit-width selection is completed using simulation-based method, and after researching two methods of searching optimal solution, a new searching method is proposed. The optimal data bit-width that meets certain requirement is obtained by using each of those methods.
出处
《现代电子技术》
2012年第21期45-48,共4页
Modern Electronics Technique
关键词
数字下变频
位宽选择
数据精度
资源消耗
FPGA
digital down-converter
bit-width selection
data precision
resource consumption
FPGA
