Design and implementation of a scaleable FFT processor for adaptive broadband OFDM system
Zhaoyang Zhang · Journal of Circuits and Systems · 2006
A 64/256/1024/2048-point scaleable FFT processor is presented.It is based on the Radix-22 SDF(Single-path Delay Feedback) butterfly architecture,and is very suitable for broadband adaptive OFDM communication system,where variable number of sub-carriers,high throughput,low latency and configuration flexibility is required.Considering the OFDM waveform characteristics,the output SNR and logic cell consumption with respect to different internal word-lengths and rotation factor quantization precisions are simulated and analyzed.Then implementation parameters are appropriately selected,which leads to a higher output performance while a less hardware consumption.