Iterative linear ISI cancellation with selective decisions

Author

Dehghan, Hossein ; Weber, Charles

Author_Institution

Doradus Technol., Inc., San Jose, CA

fYear

2005

fDate

21-21 Dec. 2005

Firstpage

501

Lastpage

506

Abstract

A computationally efficient iterative linear intersymbol interference (ISI) canceller (LIC) algorithm with selective decision (SD) is introduced. The proposed algorithm is based on hard decision processing augmented by a simple decision selection device that uses stop-and-go (SAG) criterion (G. Picchi & G. Prati, Sep. 1997) to assess the reliability of the transmit signal estimate produced by channel decoder. When the transmit signal estimate is deemed reliable, it is selected as feedback to LIC. Otherwise, a more reliable replacement is used in the next iteration that will result in reduction of error propagation and hence improvement of LIC performance. The new algorithm is shown to outperform its counterpart that does not use selective decisions in term of BER for distorted communication channels

Keywords

error statistics; interference suppression; intersymbol interference; iterative methods; telecommunication channels; turbo codes; BER; channel decoder; decision selection device; distorted communication channels; error propagation; intersymbol interference canceller algorithm; iterative linear ISI cancellation; stop-and-go criterion; transmit signal estimate; Communication channels; Equalizers; Intersymbol interference; Iterative algorithms; Iterative decoding; Maximum likelihood decoding; Maximum likelihood estimation; Signal processing; Signal processing algorithms; Video on demand;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing and Information Technology, 2005. Proceedings of the Fifth IEEE International Symposium on

Conference_Location

Athens

Print_ISBN

0-7803-9313-9

Type

conf

DOI

10.1109/ISSPIT.2005.1577148

Filename

1577148