A new Turbo equalizer with linear complexity

Author

Ampeliotis, Dimitris ; Berberidis, Kostas

Author_Institution

Dept. of Comput. Eng. & Inf., Univ. of Patras, Rio-Patras, Greece

fYear

2005

fDate

4-8 Sept. 2005

Firstpage

1

Lastpage

4

Abstract

In this paper a new soft input - soft output (SISO) equalizer of linear complexity is developed. The algorithm can be used in the so-called Turbo equalization scheme as a low cost solution in place of the Maximum A-Posteriori (MAP) equalization algorithm which has a prohibitive complexity for most real world applications. The proposed equalizer consists of two parts, namely, a Soft Interference Canceller (SIC) and a pre-processing part which is a new Variable-Threshold Decision Feedback Equalizer (VTDFE). The role of the second part is to increase the amount of a-priori information supplied to the SIC. Simulation results have shown that the proposed turbo equalizer exhibits a superior performance as compared to the turbo equalization scheme based on the conventional SIC as well as other linear complexity SISO equalizers.

Keywords

decision feedback equalisers; interference suppression; maximum likelihood estimation; MAP equalization algorithm; SIC; SISO equalizer; VTDFE; linear complexity; maximum a-posteriori equalization algorithm; soft input-soft output equalizer; soft interference canceller; turbo equalization scheme; variable-threshold decision feedback equalizer; Complexity theory; Decision feedback equalizers; Decoding; Interference; Signal to noise ratio; Silicon carbide;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing Conference, 2005 13th European

Conference_Location

Antalya

Print_ISBN

978-160-4238-21-1

Type

conf

Filename

7078059