Pilot structure for multicarrier transmissions

Details Pilot structure for multicarrier transmissions Pilot structure for multicarrier transmissions

2011-07-19

2011-07-19

Sams, Matthew (Department: 2617)

Multiplex communications

Communication over free space

Combining or distributing information via code word channels...

C370S208000, C370S350000, C370S500000, C370S503000, C370S203000, C375S260000

Reexamination Certificate

active

07983236

ABSTRACT:
Pilot sequences (for aiding a receiver in estimating a channel) are disposed in a frame structure that has subframes of sub-carriers and symbol positions. Locations of common pilot sequences are predetermined, and includes 1) in each subframe, a pilot sequence is disposed in a first symbol position for each of at least two staggered sub-carriers, and 2) in at least one subframe, at least one pilot sequence is disposed in other than the first symbol position and in a sub-carrier other than any of the at least two staggered sub-carriers. Dedicated pilot sequences, whose locations in the frame are not predetermined, are disposed in response to an indication of channel quality received over a wireless link. Common pilot sequences may relate to one or two transmit antennas, and dedicated pilot sequences may enable addition of third and fourth transmit antennas.

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“Technical Specification Group Radio Access Network; Physical Layer Aspects for Evolved UTRA (Release 7)”, 3GPP TR 25.814 vol. 1.2, 2005, 28 pages.

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