Channel estimation with superimposed pilot sequence

Summary, in English

For the purpose of various synchronization tasks (including carrier phase, time, frequency, and frame synchronization), one may add a known pilot sequence, typically a pseudo-noise sequence, to the unknown data sequence. This approach is known as a spread-spectrum pilot technique or as a superimposed pilot sequence technique. In this paper, we apply the superimposed pilot sequence technique for the purpose of channel estimation (CE). We propose and verify a truly coherent receiver based on the Viterbi algorithm, which is optimal in the sense of per-survivor processing. We also suggest a generic low-cost receiver structure based on reduced-state sequence estimation. Among the distinct advantages compared to conventional pilot-symbol-assisted CE are (i) a lack of bandwidth expansion and (ii) a significantly improved performance in fast fading environments. The proposed Viterbi receiver may also be used as an alternative receiver for pilot-symbol-assisted CE

• Author: Peter Hoeher; Fredrik Tufvesson
• Department/s: Department of Electrical and Information Technology
• Publishing year: 1999
• Language: English
• Pages: 2162-2166
• Publication/Series: Proc. IEEE GLOBECOM '99, Rio de Janeiro, Brazil, December 1999
• Volume: 4
• Links: http://dx.doi.org/10.1109/GLOCOM.1999.827587
• Document type: Conference paper
• Publisher: IEEE - Institute of Electrical and Electronics Engineers Inc.
• Topic: Electrical Engineering, Electronic Engineering, Information Engineering
• Keywords: Rayleigh channels; estimation theory; pseudonoise codes; receivers; spread spectrum communication; synchronisation
• Conference name: Global Telecommunications Conference. GLOBECOM '99
• Conference date: 1999-12-05 - 1999-12-09
• Conference place: Rio de Janeireo, Brazil
• Status: Published
• ISBN/ISSN/Other: ISBN: 0-7803-5796-5