In this paper, we propose a modified lattice reduction (LR) for parallel decoding (PD) in multiple input and multiple output (MIMO) systems. Compared with the conventional methods, without any performance loss, the symbols can be estimated in parallel using this LR-PD algorithm. This parallel decoding is achieved through the proposed postrotation matrix. Among the various LR algorithms, LLL has been considered in the analysis of this postrotation matrix. However, this can be applied to any other LR algorithms without any modifications. In simulations, we show that with a minimal number of extra arithmetic operations and without any significant loss in orthogonal defect and bit error rate performance, the parallel decoding becomes possible in a real as well as complex-valued MIMO system model.
MIMO decoding, LR-PD, LLL, lattice reduction, parallel decoding
KARTHIKEYAN, MADURAKAVI and SARASWADY, DJAGADEESAN
"Parallel decoding for lattice reduction-aided MIMO Receiver,"
Turkish Journal of Electrical Engineering and Computer Sciences: Vol. 24:
6, Article 47.
Available at: https://journals.tubitak.gov.tr/elektrik/vol24/iss6/47