Cross-ambiguity function domain multipath channel parameter estimation
2012 (English)In: Digital signal processing (Print), ISSN 1051-2004, E-ISSN 1095-4333, Vol. 22, no 2, 275-287 p.Article in journal (Refereed) Published
A new array signal processing technique is proposed to estimate the direction-of-arrivals (DOAs), time delays, Doppler shifts and amplitudes of a known waveform impinging on an array of antennas from several distinct paths. The proposed technique detects the presence of multipath components by integrating cross-ambiguity functions (CAF) of array outputs, hence, it is called as the cross-ambiguity function direction finding (CAF-DF). The performance of the CAF-DF technique is compared with the space-alternating generalized expectation-maximization (SAGE) and the multiple signal classification (MUSIC) techniques as well as the Cramer-Rao lower bound. The CAF-DF technique is found to be superior in terms of root-mean-squared-error (rMSE) to the SAGE and MUSIC techniques.
Place, publisher, year, edition, pages
Elsevier , 2012. Vol. 22, no 2, 275-287 p.
Direction-of-arrival (DOA), Multipath channels, Channel estimation, Cross-ambiguity function (CAF), Space-alternating generalized expectation-maximization (SAGE) algorithm
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-76958DOI: 10.1016/j.dsp.2011.11.002ISI: 000302190600011OAI: oai:DiVA.org:liu-76958DiVA: diva2:524095