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Iterative decoding of low-complexity space-time codes

: Sezgin, A.; Boche, H.


Gong, K. ; IEEE Communications Society:
14th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2003. Proceedings. Vol.2 : September 7 - 10, 2003, Beijing, China
Beijing: Publ. House of Electronics Industry, 2003
ISBN: 0-7803-7822-9
ISBN: 7-505-35066-8
International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC) <14, 2003, Beijing>
Conference Paper
Fraunhofer HHI ()

In this work, we study the iterative decoding of a lowcomplexity space-time architecture proposed by [1, 2] employing per-survivor-processing at the receiver with the soft-output viterbialgorithm (SOVA, [3]). At the transmitter, the space-time architecture is serially concatenated with an outer code. With the availability of extrinsic information at the receiver delivered by the SOVA, it is now possible to use a novel receiver scheme performing iterative (turbo) decoding in order to improve the performance of the architecture. According to the ZF or to the MMSE criterion, linear feedforward and -backward filters of the decision-feedback spacetime (ST) decoder are derived. Furthermore, the decision metric of the SOVA employing per-survivor-processing is developed and the performance of the scheme is analyzed and compared with the scheme in [2].