(19) United States
(12) Patent Application Publication (io) Pub. No.: US 2006/0009185 Al
Shamsaifar et al. (43) Pub. Date: Jan. 12,2006
(54) METHOD AND APPARATUS CAPABLE OF INTERFERENCE CANCELLATION
(76) Inventors: Khosro Shamsaifar, Ellicott City, MD (US); Louise C. Sengupta, Ellicott City, MD (US)
James S. Finn
C/O William Tucker
14431 Goliad Dr.
Malakoff, TX 75148 (US)
(21) Appl. No.: 11/152,579
(22) Filed: Jun. 14, 2005
Related U.S. Application Data
(60) Provisional application No. 60/586,437, filed on Jul. 8, 2004.
An embodiment ol the present invention provides an apparatus capable ol interference cancellation, comprising a first antenna capable ol receiving an electrical signal, said electrical signal comprising a main signal component and an interfering signal component; a second antenna capable ol receiving said electrical signal and passing it to a tunable delay line, said tunable delay line capable ol varying the time delay ol said electrical signal; and a combiner capable ol receiving the electrical signal from said first antenna and the time delayed electrical signal from said tunable delay line and combining them so as to cancel said interfering signal component from said electrical signal. An embodiment ol the present invention also provides an apparatus capable ol interference cancellation, comprising an antenna capable ol receiving an electrical signal, said electrical signal comprising a main signal component and an interfering signal component; and a leed back loop in which a portion ol said electrical signal passes through a cancellation path that includes a tunable delay line capable ol time delaying said electrical signal such that when a coupler recombines said electrical signals said interfering signal component from said electrical signal is substantially cancelled.