A Joint Algorithm of Equalizer and Detector Based on Coded-Ofdm Systems in High-Speed Channels

Abstract

In this letter, we present a joint algorithm of equalization and detector based on block Markov superposition transmission (BMST) codes for OFDM systems (called BMST-OFDM) over high-speed channels. In the BMST-OFDM systems, the equalizer can exchange soft messages with the demapper and BMST decoder in an iterative fashion. Simulation results show that: (1) our proposed equalization algorithm can perform better than the conventional algorithms in the BMST-OFDM systems, although the proposed equalizer has a higher error floor in the un-coded systems, (2) our proposed equalization algorithm has lower computation complexity than the conventional algorithms, which require to construct a huge state space or perform the inversion of matrix, and (3) the performances of the proposed scheme match well with the lower bounds in the high signal-to-noise ratio (SNR) region.LEI LIN 84