Frequency Domain Soft-Decision Feedback Equalization for SC-FDMA with Insufficient Cyclic Prefix
نویسندگان
چکیده
Single-carrier frequency-division multiple access (SC-FDMA) system suffers performance degradation when the length of the cyclic prefix (CP) is less than the channel delay spread. In this paper, based on MMSE criterion, we proposed an efficient frequency domain soft-decision feedback equalization (FDSDFE) scheme for SC-FDMA system. The proposed scheme employs residual inter-symbols cancellation (RISIC) algorithm, combining a prior information to reduce inter-block interference (IBI) and inter-carrier interference (ICI) component caused by the absence of CP in multipath fading channel. In addition, an FD-SDFE is derived to further mitigate the residual interference. Simulation results show that the proposed scheme has a significant performance improvement.
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