MINIMUM MSE FSE DESIGN DEMO

The file fsedemo.m is Matlab code intended as demonstration software for minimum MSE FSE design calculations. Suggested examples (labeled 0-3) or user defined channel models produce plots similar to those below.

fsedemo.m

This tutorial is precisely the 6 figures produced upon running the matlab file fsedemo.m for the example 0, entitled "illustrative" in the code. The software generates the following figures:
  1. Zero locations of T/2-spaced channel

  2. Optimum error rate performance

  3. Frequency response magnitudes: T- and T/2-spaced equalizers

  4. Frequency response magnitudes: T- and T/2-spaced chan-eq combinations

  5. Impulse response coefficient magnitudes: T- and T/2-spaced chan-eq combinations

  6. Condition number of channel convolution matrix versus SNR

This "illustartive" example indicates how the frequency response of the optimum T/2-spaced equalizer is not, in general, the inverse of the T/2-spaced channel model. Furthermore, the example shows that the convolution of the T/2-spaced equalizer and the T/2-spaced channel does not approximate a single nonzero tap, while its downsampled T-spaced version does.