DocumentCode :
401266
Title :
Analysis of linear turbo equalizer via EXIT chart
Author :
Lee, Seok-Jun ; Singer, Andrew C. ; Shanbhag, Naresh R.
Author_Institution :
Dept. of Electr. & Comput. Eng., Illinois Univ., Urbana, IL, USA
Volume :
4
fYear :
2003
fDate :
1-5 Dec. 2003
Firstpage :
2237
Abstract :
We propose a method for the analysis of linear turbo equalization based on extrinsic information transfer (EXIT) charts. Given channel knowledge, and therefore the optimum linear equalizer coefficients, the evolution of soft information of the soft-input soft-output (SISO) equalizer can be estimated by computing bit error rates (BER) analytically. Compared to conventional analysis methods, the proposed method predicts the linear turbo equalizer performance without running extensive simulations to obtain the SISO equalizer EXIT charts. Using an empirically generated SISO decoder EXIT chart, convergence analysis can be undertaken. Further, the method provides a bound on the achievable BER for given channels and an estimate of equalizer complexity. These approximate analyses are validated via computer simulations.
Keywords :
computational complexity; convergence of numerical methods; decoding; equalisers; error statistics; interference suppression; intersymbol interference; parameter estimation; BER; EXIT charts; ISI; SISO decoder; SISO equalizer; bit error rates; equalizer complexity; extrinsic information transfer charts; intersymbol interference; linear equalizer; linear turbo equalizer; soft-input soft-output equalizer; turbo decoding; Analytical models; Bit error rate; Computational modeling; Convergence; Decoding; Equalizers; Error analysis; Information analysis; Performance analysis; Predictive models;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Global Telecommunications Conference, 2003. GLOBECOM '03. IEEE
Print_ISBN :
0-7803-7974-8
Type :
conf
DOI :
10.1109/GLOCOM.2003.1258633
Filename :
1258633
Link To Document :
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