Antenna virtualization in communication systems

Details Antenna virtualization in communication systems Antenna virtualization in communication systems

2006-08-17

2008-11-11

Fan, Chieh M. (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

Reexamination Certificate

active

07450657

ABSTRACT:
Communication systems and methods are described in which multiple transmit signals are generated from an input stream or signal. The communication systems and methods, collectively referred to as antenna virtualization or virtual antenna systems, generate from each input stream multiple transmit signals that when driven into multiple antennas create a radiation pattern that effectively appears to originate from a single antenna. The communications operations include receiving at least one input stream. Multiple transmit signals are generated from the received input stream; the number of transmit signals generated is greater than the number of received input streams. Generation of the transmit signals involves transforming the input stream. The transforming includes applying one or more of a variable delay, a phase shift, and signal shaping to information of the input stream. The transmit signals are transmitted by a separate antenna of an antenna system.

REFERENCES:
patent: 5457708 (1995-10-01), Baghdady
patent: 6731619 (2004-05-01), Ramesh et al.
patent: 2006/0111054 (2006-05-01), Pan et al.
Form PCT/IB/326, “PCT Notification Concerning Transmittal of International Preliminary Report on Patentability (Chapter 1 of the Patent Cooperation Treaty),” 1 pg., Feb. 28, 2008.
Form PCT/IB/373, “PCT International Preliminary Report on Patentability,” 1 pg., Feb. 28, 2008.
Form PCT/ISA/237, “PCT Written Opinion of the International Searching Authority,”3 pgs., Feb. 28, 2008.

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