Journal
IEEE TRANSACTIONS ON SIGNAL PROCESSING
Volume 59, Issue 5, Pages 2432-2436Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TSP.2011.2113181
Keywords
Doubly dispersive channel; interference cancelation; intersymbol/intercarrierinterference; LSQR algorithm; OFDM; pulse-shaping multicarrier transmission
Categories
Funding
- FWF within National Research Network SISE [S10602, S10603, S10606]
- WWTF [MA 44, MA 07-004]
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We propose a low-complexity intercarrier interference/intersymbol interference (ICI/ISI) equalizer for multicarrier transmissions over doubly dispersive channels. Decision-feedback (or interference cancelation) is used with respect to both time and frequency. The ICI stage employs an extension of the iterative LSQR algorithm using groupwise interference cancelation with reliability-based sorting of sets of subcarriers and a band approximation of the frequency-domain channel matrix. The LSQR algorithm is attractive because of its excellent numerical properties and low complexity. Optimal pulse design is optionally considered for shaping the ICI/ISI. Simulation results demonstrate the excellent performance of the proposed ICI/ISI equalizer.
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