International Conference on Information Technology and Computer Science, 3rd (ITCS 2011)
32 A New High-Efficiency Architecture of FFT Processor for LTE-Advanced System
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It is very urgent to design higher speed FFT processor due to higher requirement in LTE-Advanced system. In this paper, we propose a new parallel cascade architecture for FFT processor. The architecture, which combines advantages of parallel with that of cascade architecture, is flexible in parallel grade. To simplify accessing memories, propose a new address mapping scheme, too. With the property of in-place operation, only a RAM is used to store in-out data. The scheme is very efficient for generating SC-FDMA baseband signal in LTE-Advanced system.