Title :
Improved receivers for digital high frequency waveforms using turbo equalization
Author :
Otnes, Roald ; Tüchler, Michael
Author_Institution :
UniK - Univ. Graduate Center, Kjeller, Norway
Abstract :
We develop a turbo equalization-based receiver for serial-tone HF waveforms, where the conventional decision feedback equalizer is replaced by a soft-in soft-out (SISO) equalizer, and the receiver iterates soft information between the equalizer and the decoder. To keep the computational burden of the iterative equalization and decoding procedure as low as possible, the SISO equalizer uses a linear filter, performing soft intersymbol interference cancellation. Simulation results show that the proposed receiver performs more than 2 dB signal-to-noise ratio better than a conventional DFE-based receiver over an ITU-R poor channel.
Keywords :
channel estimation; computational complexity; equalisers; interference suppression; intersymbol interference; iterative decoding; radio receivers; 3 to 30 MHz; SISO equalizer; channel estimation; decision feedback equalizer; digital high frequency waveforms; intersymbol interference cancellation; iterative decoding; iterative equalization; linear filter; receivers; serial-tone HF waveforms; signal-to-noise ratio; soft-in soft-out equalizer; turbo equalization; Decision feedback equalizers; Error correction codes; Frequency; Intersymbol interference; Iterative decoding; Maximum likelihood decoding; Maximum likelihood estimation; RF signals; Receivers; Signal to noise ratio;
Conference_Titel :
MILCOM 2002. Proceedings
Print_ISBN :
0-7803-7625-0
DOI :
10.1109/MILCOM.2002.1180421