Wordlength optimization with complexity-and-distortion measure and its application to broadband wireless demodulator design
Wordlength optimization with complexity-and-distortion measure and its application to broadband wireless demodulator design
复制标题
复杂度和失真测量的字长优化及其在宽带无线解调器设计中的应用
DOI：
10.1109/icassp.2004.1327041
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
B. Evans
中科院分区：
文献类型：
--
作者：
Kyungtae Han;B. Evans
许多数字信号处理算法都是先在浮点上开发，然后再映射到定点上进行数字硬件实现。在此映射过程中，搜索字长以最小化总硬件成本并最大化系统性能。对于最优字长的选择，分别研究了复杂度和失真度量。本文提出了一种结合这两种度量的复杂度和失真度量(CDM)方法。清洁发展机制方法使用一个加权系数来权衡这两个衡量标准。将该方法应用于固定宽带无线解调器的字长设计。对于这个案例研究，提出的方法找到最优解的时间是穷举搜索所需时间的三分之一。本文的贡献是：(1)基于复杂度或失真度量的搜索方法的推广；(2)自动字长优化的框架；(3)无线解调器的案例研究。
Many digital signal processing algorithms are first developed in floating point and later mapped into fixed point for digital hardware implementation. During this mapping, wordlengths are searched to minimize total hardware cost and maximize system performance. Complexity and distortion measures have been separately researched for optimum wordlength selection. This paper proposes a complexity-and-distortion measure (CDM) method that combines these two measures. The CDM method trades off these two measures using a weighting factor. The proposed method is applied to wordlength design of a fixed broadband wireless demodulator. For this case study, the proposed method finds the optimal solution in one-third the time that exhaustive search takes. The contributions of this paper are: (1) a generalization of search methods based on complexity or distortion measures; (2) a framework of automatic wordlength optimization; and (3) a wireless demodulator case study.