摘要
介绍一种基于存储器的3 780点FFT的FPGA设计和实现,把3 780分解为7×9×5×4×3共5级,每一级进行对应点的WFTA[1]运算,并利用in-order、in-place PFA[2]算法,实现了每一级存储器读写地址的一致性。同时对整个系统的功能进行仿真和分析,其性能满足了TDS-OFDM[3]系统的信噪比要求。
The paper introduces the design and realization of 3780 -point FFT based on memory using FPGA.The design includes 5 steps to implement 3780 - point FFT by discomposing 3780 into 7 × 9× 5 × 4 ×3 and adopts WFTA , which is combined with in-order, in-place PFA , to compute the 7,9,5,3,4 -point DFT.The simulation and analysis of the whole system prove that it can meet the signal-to-quantization noise ratio requirement of the TDS - OFDM system.
出处
《中国有线电视》
2005年第23期2340-2342,共3页
China Digital Cable TV
