Complementary sequences for ISI channel estimation Academic Article

abstract

• A merit factor based on the sequence autocorrelation function, whose minimization leads to the reduction in the Crmer-Rao lower bound (CRLB) for the variance of "two-sided" intersymbol interference (ISI) channel estimation is introduced. Pairs of binary pilot symbol sequences (a preamble and a postamble) for channel estimation are jointly designed to minimize this merit factor. Given that the number of channel taps is L and the length of a pilot symbol sequence is (N+L-1), where N L, we distinguish between the case when N is even and the case when it is odd. For even N, we show that complementary sequences not only minimize the merit factor, but also the CRLB. For a subset of odd N we construct almost-complementary periodic sequence pairs that minimize the merit factor. The optimal pilot symbol block signaling requires alternating between two (in most cases) different binary sequences that form the merit-minimizing pair.

authors

• Georghiades, Costas

published proceedings

• IEEE TRANSACTIONS ON INFORMATION THEORY

altmetric score

• 9

author list (cited authors)

• Spasojevic, P., & Georghiades, C. N.

citation count

• 114

complete list of authors

• Spasojevic, P||Georghiades, CN

publication date

• March 2001

publisher

• Institute of Electrical and Electronics Engineers (IEEE)  Publisher

published in

• IEEE TRANSACTIONS ON INFORMATION THEORY  Journal

keywords

• Autocorrelation Merit Function
• Complementary Sequences
• Intersymbol Interference (isi) Channels
• Pilot Symbols

Digital Object Identifier (DOI)

• 10.1109/18.915670

start page

• 1145

end page

• 1152

volume

• 47

issue

• 3

URL

• http://dx.doi.org/10.1109/18.915670