Modified extrinsic information feedback mechanism based on FG-turbo equalization
Zhongyong Wang, Pla Information · Computer Engineering and Applications Journal · 2012
This paper uses the factor graph and sum-product algorithm to discuss the turbo equalization principle, compares the performances of FG-turbo equalization algorithm in the sparse and non-sparse channels, and proposes a new FG-turbo equalization extrinsic information feedback mechanism in the non-sparse channel. Simulation results show that in sparse channel, the performance of the FG-turbo equalization is very close to the performance of the MAP-turbo equalization after several iterations, and the improvement of the modified extrinsic information feedback mechanism makes FG-turbo equalization obtain better performance gain.