Title :
On filter-based turbo equalization with serially concatenated trellis coded modulation
Author :
Nysaeter, Asgeir ; Otnes, Roald
Author_Institution :
Unik-Univ. Graduate Center, Kjeller, Norway
Abstract :
A recursive trellis coded modulation (TCM) precoder is combined with a linear minimum mean squared error (LMMSE) turbo equalizer. The system is optimized by using inner and outer codes with maximum slope of the active burst distance, and also by maximizing the minimum distance between inner and outer code extrinsic transfer functions. A great improvement is obtained in the frame error rate (FER) compared to the LMMSE turbo equalizer. Optimum precoders are selected from the set of 2-state bit geometrically uniform (BGU) encoders for the 8-PSK signal set.
Keywords :
channel coding; concatenated codes; equalisers; error statistics; least mean squares methods; phase shift keying; recursive filters; transfer functions; trellis coded modulation; turbo codes; 2-state BGU encoders; 8-PSK signal set; FER; LMMSE turbo equalizer; active burst distance; bit geometrically uniform encoders; extrinsic transfer functions; filter-based turbo equalization; frame error rate; inner codes; linear minimum mean squared error; maximum slope; optimum precoders; outer codes; recursive trellis coded modulation precoder; serially concatenated trellis coded modulation; trellis coded modulation; Concatenated codes; Convergence; Decoding; Equalizers; Error analysis; Filters; Intersymbol interference; Modulation coding; Performance gain; Transfer functions;
Conference_Titel :
Communications, 2005. ICC 2005. 2005 IEEE International Conference on
Print_ISBN :
0-7803-8938-7
DOI :
10.1109/ICC.2005.1494405
