| Title | A Channel Estimation and Iterative Equalization Scheme OFDM in Low-voltage Power-line Communication System |
| Authors | GJ Han L Qin XG Yin LJ Yang |
| Issue Date | 2012 |
| Publisher | Proceedings of the CSEE |
| Keywords | power-line communication orthogonal frequency division multiplexing non-cyclic-prefix |
| Citation | Proceedings of the CSEE, 2008. |
| Abstract | Orthogonal frequency division multiplexing (OFDM) technique is widely attractive in low-voltage power-line high-rate communication area. Conventional OFDM systems eliminate inter-symbol interference (ISI) by inserting cyclic-prefix which is longer than channel response maximum length to each OFDM symbol. It inevitably brings decreased transmission efficiency. A channel estimation and iterative equalization scheme in OFDM low-voltage power-line communication systems with non-cyclic-prefix information signals is proposed. Adopting m-sequence as training sequence and taking use of its special autocorrelation characteristics, channel time-domain response can be obtained at the receiver. Then, ISI can be further removed through iterative equalization. Computer simulations show that the scheme proposed increases the transmission efficiency, and at the same time, can obtain lower error bit rate and mean square error of channel estimation than conventional OFDM systems with relative low complexity. |
| Appears in Collections: | 电子系 |
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