The authors propose a novel turbodetection scheme based on the factor graph (fg) serial-schedule belief propagation equalisation algorithm with low complexity for single-carrier faster-than-Nyquist (SC-FTN) and multi...
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The authors propose a novel turbodetection scheme based on the factor graph (fg) serial-schedule belief propagation equalisation algorithm with low complexity for single-carrier faster-than-Nyquist (SC-FTN) and multi-carrier FTN (MC-FTN) signalling. In this work, the additive white Gaussian noise channel and multi-path fading channels are both considered. The iterative fg-based equalisation algorithm can deal with severe intersymbol interference and intercarrier interference introduced by the generation of SC and MC-FTN signals, as well as the effect of multi-path fading. With the application of Gaussian approximation, the complexity of the proposed equalisation algorithm is significantly reduced. In the turbodetection, low-density parity check code is employed. The simulation results demonstrate that the fg-based turbo detection method can achieve satisfactory performance with low complexity.
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