Training-based channel estimation for multiple-antennas

Details Training-based channel estimation for multiple-antennas Training-based channel estimation for multiple-antennas

2005-10-25

2005-10-25

Chin, Stephen (Department: 2634)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C375S229000, C375S285000, C375S308000, C375S347000, C375S350000, C370S208000, C342S367000

Reexamination Certificate

active

06959047

ABSTRACT:
The burden of designing multiple training sequences for systems having multiple transmit antennas, is drastically reduced by employing a single sequence from which the necessary multiple sequences are developed. The single sequence is selected to create sequences that have an impulse-like autocorrelation function and zero cross correlations. A sequence of any desired length Ntcan be realized for an arbitrary number of channel taps, L. The created sequences can be restricted to a standard constellation (that is used in transmitting information symbols) so that a common constellation mapper is used for both the information signals and the training sequence. In some applications a a training sequence may be selected so that it is encoded with the same encoder that is used for encoding information symbols. Both block and trellis coding is possible in embodiments that employ this approach.

REFERENCES:
patent: 2002/0067309 (2002-06-01), Baker et al.
patent: 2004/0013211 (2004-01-01), Lindskog et al.
Optimal space-time block codes for CDMA systems; Geng, J.; Mitra, U.; Fitz, M.P.; MILCOM 2000. 21st Century Military COmmunications Conference Proceedings, vol.: 1, Oct. 22-25, 2000 pp.: 387-391 vol. 1.
A space-time coding modem for high-data-rate wireless communications; Naguib, A.F.; Tarokh, V.; Seshadri, N.; Calderbank, A.R.; Selected Areas in Communications, IEEE Journal on, vol.: 16, Issue: 8, Oct. 1998 pp.: 1459-1478.
E Lindskog et al, A Transmit Diversity Scheme for Channels With Intersymbol Interferecne, ICC, 1:307-311, 2000.

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