Title :
An analytical method for MMSE MIMO turbo equalizer EXIT chart computation
Author :
Kansanen, Kimmo ; Matsumoto, Tad
Author_Institution :
Norwegian Univ. of Sci. & Technol.
Abstract :
A frequency domain soft-interference canceling minimum mean-square error (MMSE) turbo equalizer is studied. A computationally efficient method for computing extrinsic information transfer (EXIT) function of the equalizer is proposed. The method is based on the Gaussian approximation for the equalizer output and it produces an approximate EXIT chart in a fraction of computational load compared to previous numerical methods. The accuracy of the method is verified for both single-input single-output (SISO) and multiple-input multiple output (MIMO) channels
Keywords :
Gaussian processes; MIMO communication; equalisers; frequency-domain analysis; interference suppression; least mean squares methods; EXIT chart computation; Gaussian approximation; MMSE MIMO turbo equalizer; analytical method; computational load; computationally efficient method; equalizer output; extrinsic information transfer function; frequency domain soft-interference canceling; minimum mean-square error turbo equalizer; single-input single-output channel; Convergence; Decision feedback equalizers; Frequency domain analysis; Frequency-selective fading channels; Gaussian approximation; Interference cancellation; Iterative decoding; Iterative methods; MIMO; Nonlinear filters;
Journal_Title :
Wireless Communications, IEEE Transactions on
DOI :
10.1109/TWC.2007.05172
