Improved interference approximation method for preamble-based channel estimation in FBMC/OQAM
2011 (English)In: European Signal Processing Conference, 2011, 1603-1607 p.Conference paper (Refereed)
Filter bank-based multicarrier modulation (FBMC) using offset quadrature amplitude modulation (OQAM), known as FBMC/OQAM (or OFDM/OQAM), provides an attractive alternative to the conventional cyclic prefix-based orthogonal frequency division multiplexing (CP-OFDM), especially in terms of increased robustness to frequency offset and Doppler spread, and high bandwidth efficiency. It suffers, however, from an inherent (intrinsic) imaginary intercarrier/ inter-symbol interference that complicates signal processing tasks such as channel estimation (CE). Recently, the so-called interference approximation method (IAM) was proposed for preamble-based CE. It relies on the knowledge of the pilot's neighborhood to approximate this interference and constructively exploit it in simplifying CE and improving its performance. The IAM preamble with nulls at the neighboring time instants that results in optimum CE performance was recently reported. This paper investigates an extended version of it, which can provide significant improvement through an appropriate exploitation of the interfering symbols from neighboring time instants as well. Simulation results are presented that compare the methods, with each other and with CP-OFDM, in both mildly and highly frequencyselective channels.
Place, publisher, year, edition, pages
2011. 1603-1607 p.
, European Signal Processing Conference, ISSN 2219-5491
Approximation methods, CP-OFDM, Doppler spread, Extended versions, Frequency offsets, Frequency-selective channels, High bandwidth, Ofdm/oqam, Offset quadrature amplitude modulations, Approximation theory, Filter banks, Frequency allocation, Orthogonal frequency division multiplexing, Channel estimation
IdentifiersURN: urn:nbn:se:kth:diva-149782ScopusID: 2-s2.0-84863757581OAI: oai:DiVA.org:kth-149782DiVA: diva2:741907
19th European Signal Processing Conference, EUSIPCO 2011; Barcelona, Spain, 29 August-2 September, 2011
QC 201408292014-08-292014-08-272014-08-29Bibliographically approved