Abstract
We propose a message-passing algorithm of joint channel estimation and decoding for OFDM systems, where expectation propagation is exploited to deal with channel estimation. Specially, the message updating is formulated into a recursive form. As a result, for system with K subcarriers and L channel taps, only O(K + L) messages need to be tracked, and meanwhile they can be efficiently calculated using FFT with complexity O(K-A- + K log2 K), where -A- denotes the constellation size. Numerical experiments show that our algorithm achieves BER performance within 0.5 dB of the known-channel bound. © 2014 IEEE.
Original language | English |
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Title of host publication | IEEE International Conference on Acoustics, Speech and Signal Processing |
Place of Publication | Florence, Italy |
Publisher | IEEE, Institute of Electrical and Electronics Engineers |
Pages | 1941-1945 |
ISBN (Print) | 9781479928927 |
DOIs | |
Publication status | Published - 2014 |
Event | Expectation propagation approach to joint channel estimation and decoding for OFDM systems - Florence, Italy Duration: 1 Jan 2014 → … |
Conference
Conference | Expectation propagation approach to joint channel estimation and decoding for OFDM systems |
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Period | 1/01/14 → … |