Title :
Adaptive decision feedback turbo equalization and multiuser detection
Author :
Trajkovic, Vladimir D. ; Rapajic, Predrag B.
Author_Institution :
Univ. of New South Wales, Sydney, NSW, Australia
fDate :
30 Aug.-2 Sept. 2004
Abstract :
The analysis of adaptive decision feedback turbo equalization is provided. The turbo detector is a reduced-complexity adaptive turbo equalizer where trellis-based channel equalization is replaced by the adaptive decision feedback equalizer (DFE). We show that for severe intersymbol interference (ISI) the turbo effect (waterfall region) starts at lower SNR relative to the detector applying conventional MMSE DFE coefficients assuming perfect feedback.
Keywords :
adaptive equalisers; decision feedback equalisers; intersymbol interference; multiuser detection; spread spectrum communication; turbo codes; DFE; ISI; SNR; adaptive equalization; decision feedback equalization; multiuser detection; reduced-complexity equalizer; severe intersymbol interference; turbo equalization; waterfall region; AWGN; Adaptive equalizers; Bit error rate; Decision feedback equalizers; Detectors; Intersymbol interference; Maximum likelihood decoding; Maximum likelihood estimation; Multiuser detection; Turbo codes;
Conference_Titel :
Spread Spectrum Techniques and Applications, 2004 IEEE Eighth International Symposium on
Print_ISBN :
0-7803-8408-3
DOI :
10.1109/ISSSTA.2004.1371758
