发明名称 |
Method and system for fixed point fast fourier transform with improved SNR |
摘要 |
A system and method of improving signal to noise ration (SNR) in a fixed point fast Fourier transform (FFT/IFFT) generates from sample inputs and a twiddle factor butterfly outputs for each stage; scales the butterfly outputs of this stage from a predicted normalization scale factor to obtain the maximum butterfly output without overflow from this stage; determines from the butterfly outputs of this stage the minimum normalizing exponent for the butterfly outputs of this stage and predicts a normalization scale factor of the next stage from the minimum normalizing exponent of this stage and a stage guard scale value to obtain the maximum butterfly output without overflow from that next stage.
|
申请公布号 |
US2004111227(A1) |
申请公布日期 |
2004.06.10 |
申请号 |
US20030389655 |
申请日期 |
2003.03.14 |
申请人 |
STEIN YOSEF;PRIMO HAIM |
发明人 |
STEIN YOSEF;PRIMO HAIM |
分类号 |
G06F17/14;(IPC1-7):G01R23/16;G06F19/00 |
主分类号 |
G06F17/14 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|