摘要
在LTE系统设计过程中,上行链路采用单载波频分多址技术(SC-FDMA),下行链路采用正交频分多址技术(OFDMA)。在用这两种技术实现LTE的过程中,都采用了DFT或FFT的处理方法,而直接计算DFT的计算量太大。因此本文通过对LTE系统中各种FFT算法进行了分析,重点对Cooley-Tukey FFT算法进行了研究,同时以变换区间N=12和N=15为例,通过电路复用的方式进行了FPGA实现与验证。
In the process of LTE system design,in order to meet the performance requirements of LTE,the uplink adopt the single-carrier frequency division multiple access technolog （SC-FDMA）, the uplink adopt the orthogonal frequency division multiple access technolog （OFDMA）.in the process of achieving the LTE, have adopted DFT or FFT approach, however, calculation of direct calculation the DFT, is proportional to the square of the length of N, calculate volume too much. Herefore,in this paper, first introduce and study the various FFT algorithms, at the same time, focusing on the Cooley-Tukey FFT algorithm,second ,take the transform interval N = 12 and N = 15 for example,by the way the circuit reuse of FPGA implementation And verification.
出处
《信息通信》
2010年第2期12-15,共4页
Information & Communications
基金
"新一代宽带无线移动通信网"国家科技重大专项TD-LTE无线综合测试仪表开发(2009ZX03002-009)
