Joint coding-precoding with low-complexity turbo-decoding

Authors:
Zhengdao Wang;Shengli Zhou;G. B. Giannakis
Affiliations:
Dept. of Electr. & Comput. Eng., Iowa State Univ., Ames, IA, USA;-;-
Venue:
IEEE Transactions on Wireless Communications
Year:
2004

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Abstract

We combine error-control coding with linear precoding (LP) for flat-fading channels, as well as for wireless orthogonal frequency-division multiplexing transmissions through frequency-selective fading channels. The performance is analyzed and compared with the corresponding error-control-coded system without precoding. By wedding LP with conventional error-control coding, the diversity order becomes equal to the error-control code's minimum Hamming distance times the precoder size. We also derive a low-complexity turbo-decoding algorithm for joint coded-precoded transmissions. We analyze the decoding complexity and compare it with an error-control-coded system without LP. Extensive simulations with convolutional and turbo codes for HiperLan/2 channels support the analysis and demonstrate superior performance of the proposed system.