Title :
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
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;
Conference_Titel :
Signal Processing Conference, 2005 13th European
Conference_Location :
Antalya
Print_ISBN :
978-160-4238-21-1
