Title :
Reduced complexity in-phase/quadrature-phase turbo equalisation using iterative channel estimation
Author :
Yeap, B.L. ; Wong, C.H. ; Hanzo, L.
Author_Institution :
Dept. of Electron. & Comput. Sci., Southampton Univ., UK
Abstract :
A novel reduced complexity trellis-based equaliser, referred to as the in-phase/quadrature-phase equaliser (I/Q-EQ), is proposed. The I/Q-EQ is employed in the context of turbo equalisation (TEQ-IQ) and with the aid of iterative channel estimation. The performance of the TEQ-IQ is characterized in a noise limited environment over an equally-weighted, symbol-spaced three-path Rayleigh fading channel. The TEQ-IQ achieved the same performance as the conventional turbo equaliser, while achieving a complexity reduction by a factor of 1.25 and 7.17 for 4-QAM and 16-QAM, respectively
Keywords :
Gaussian channels; Rayleigh channels; computational complexity; decision feedback equalisers; iterative methods; modulation coding; multipath channels; parameter estimation; quadrature amplitude modulation; turbo codes; 16-QAM; 4-QAM; BER; DFE; I/Q-EQ; ISI; bit error rate; coded MQAM system; equaliser performance; equally-weighted fading channel; in-phase/quadrature-phase turbo equalisation; intersymbol interference; iterative channel estimation; noise limited environment; nondispersive Gaussian channel; reduced complexity equalisation; symbol-spaced three-path Rayleigh fading; trellis-based equaliser; Bit error rate; Channel estimation; Decision feedback equalizers; Fading; Gaussian noise; Intersymbol interference; Iterative decoding; Performance loss; Quadrature phase shift keying; Working environment noise;
Conference_Titel :
Communications, 2001. ICC 2001. IEEE International Conference on
Conference_Location :
Helsinki
Print_ISBN :
0-7803-7097-1
DOI :
10.1109/ICC.2001.936969
