w by a factor of <code>fftLen</code> when computing the forward transform. The inverse transform includes a scale of <code>1/fftLen</code> as part of the calculation and this matches the textbook definition of the inverse FFT. </dd></dl>
<dl class="section user"><dt></dt><dd>Pre-initialized data structures containing twiddle factors and bit reversal tables are provided and defined in <code><a class="el" href="arm__const__structs_8h.html">arm_const_structs.h</a></code>. Include this header in your function a