期刊
IEEE COMMUNICATIONS LETTERS
卷 24, 期 1, 页码 81-85出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LCOMM.2019.2950320
关键词
Multicarrier faster-than-Nyquist signaling; inter-symbol interference; inter-carrier interference; Gaussian message passing
资金
- National Science Foundation of China (NSFC) [61971041, 61571041, 61471037]
In this letter, we propose a low-complexity receiver for multicarrier faster-than-Nyquist (MFTN) signaling over frequency selective channels. By introducing a time-frequency trellis state, we are able to reformulate the MFTN detection problem into a linear state-space model. Building on this, a vector-form Forney style cycle-free factor graph is constructed. Then, Gaussian message passing technique is employed to derive the parametric message updating expressions. Accordingly, only the mean vectors and covariance matrices have to be calculated, which significantly reduces the computational complexity of MFTN detection. Simulation results demonstrate that the proposed receiver outperforms the symbol-by-symbol receiver by about 1 dB in terms of bit error rate (BER) and approaches the BER performance of the maximum a posteriori probability detector. Meanwhile, 39% more spectral efficiency can be obtained at a BER performance loss of less than 0.3 dB.
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