Title :
Soft output decoding algorithm for spacetime block codes over unknown time varying channels with intersymbol interference
Author :
Somayajula, Sangeetha ; Buckley, Kevin ; Perry, Richard
Author_Institution :
Dept. of Electr. & Comput. Eng., Villanova Univ., PA, USA
Abstract :
In this paper we describe and evaluate a soft input soft output (SlSO) decoding algorithm for space time block codes (STBC´s) over unknown, time-varying intersymbol interference (ISI) channels. We consider a per-survivor processing (PSP) approach with Kalman filter tracking and forward-backward processing. We also provide a space-time coding example, which employs a serially concatenated recursive systematic code (RSC) and a STBC scheme, with interleaving, and a soft decision iterative (turbo) receiver for unknown time-varying ISI channels.
Keywords :
Kalman filters; block codes; concatenated codes; interleaved codes; intersymbol interference; iterative decoding; space-time codes; time-varying channels; turbo codes; Kalman filter tracking; SlSO decoding algorithm; forward-backward processing; intersymbol interference; persurvivor processing; recursive systematic code; soft decision iterative receiver; soft input soft output; soft output decoding algorithm; spacetime block codes; time varying channels; time-varying ISI channels; Block codes; Concatenated codes; Convolutional codes; Fading; Finite impulse response filter; Gaussian channels; Intersymbol interference; Iterative decoding; Space time codes; Turbo codes;
Conference_Titel :
Signals, Systems and Computers, 2004. Conference Record of the Thirty-Seventh Asilomar Conference on
Print_ISBN :
0-7803-8104-1
DOI :
10.1109/ACSSC.2003.1292094
