2024-02-22
2024-01-25
2024-01-24
Abstract— A subspace-based method is proposed for estimating the channel responses of single-input-multiple-output (SIMO) Orthogonal Frequency Division Multiplexing (OFDM) system. Our technique relies on minimum noise subspace (MNS) decom¬position to obtain noise subspace in a parallel structure from a set of pairs (combinations) of system outputs that form a properly connected sequence (PCS). The developed MNS-OFDM estimator is more efficient in computation than subspace (SS)¬OFDM estimator, although the former is less robust to noise than the later. To maximise the MNS-OFDM estimator performance, a symmetric version of MNS is implemented. We present simulation results demonstrating the channel identification performance of the corresponding OFDM-based SIMO systems employ cyclic prefixing approach.
Index Terms: OFDM, MNS, Blind Channel Identification, Equalisation.
Cite:Faisal O. Alayyan, Raed M. Shubair, Abdelhak M. Zoubir, and Yee Hong Leung, "Blind Channel Identification and Equalisation in OFDM using Subspace-Based Methods," Journal of Communications, vol. 4, no.7, pp.472-484, 2009