Resolving user-specific narrow beam signals using a known...

Details Resolving user-specific narrow beam signals using a known... Resolving user-specific narrow beam signals using a known...

2007-08-28

2007-08-28

Nguyen, Steven (Department: 2616)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C370S342000, C370S516000, C375S371000, C375S148000

Reexamination Certificate

active

10186553

ABSTRACT:
A method and apparatus are provided that corrects for differences in reception between a user-specific signal and a common signal. In one embodiment, the invention includes receiving a common pilot signal transmitted on a wide beam at a remote terminal, receiving a user-specific signal transmitted on a directed narrow beam at the remote terminal, demodulating the user-specific signal using the common pilot signal for channel estimation, estimating a phase error in the demodulated user-specific signal using known symbols in the user-specific signal, and correcting for the phase error in the demodulated user-specific signal using the phase error estimates.

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Pederson et al., “A Simple Downlink Antenna Array Algorithm Based on a Hybrid Scheme of Transmit Diversity and Conventional Beamforming”, 2001 IEEE, pp. 58-62.
Lindskog et al., “A Transmit Diversity Scheme for Channels with Intersymbol Interference”, ICC 2000, Jun. 2000, vol. 1, pp. 307-311.

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