[moved] preffered data and FFT length for blackman harris window

[kranthi0510]

fr Rectangular window if data length is 1K then FFT Lenght Should be 1K FFT only because ENBW of rectangualr window is 1.0 but for Minimum 4-Sanple BlackmannHarris window is 2.0. so for improving accuracy in terms of either frequency or amplitude which method is preferrded in below 1. for 1K Data i will append 1K zeros and Caluclate 2K FFT or 2. instead of 1K data take 2K data and calclate 2K FFT

or else any other method please calrify ..

 

[D.A.(Tony)Stewart]

2K data will improve accuracy at low frequency end and extend range of FF from 2.5 to 3 decades.