Invention Grant
- Patent Title: Self-interference cancellation for MIMO radios
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Application No.: US15025256Application Date: 2014-09-29
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Publication No.: US10243719B2Publication Date: 2019-03-26
- Inventor: Dinesh Bharadia , Sachin Katti
- Applicant: The Board of Trustees of the Leland Stanford Junior University
- Applicant Address: US CA Palo Alto
- Assignee: The Board of Trustees of the Leland Stanford Junior University
- Current Assignee: The Board of Trustees of the Leland Stanford Junior University
- Current Assignee Address: US CA Palo Alto
- Agency: Alston & Bird LLP
- International Application: PCT/US2014/058117 WO 20140929
- International Announcement: WO2015/048678 WO 20150402
- Main IPC: G01R31/08
- IPC: G01R31/08 ; H04L5/14 ; H04B1/525 ; H04B7/0413 ; H04B1/48 ; H04L5/00 ; H04L5/16 ; H04L27/00

Abstract:
A MIMO wireless communication device includes, in part, a first transmit path adapted to transmit a first transmit signal from a first antenna, a second transmit path adapted to transmit a second transmit signal from a second antenna, a first receive path adapted to receive a first receive signal, an interference cancellation circuit and a controller. The cancellation circuit includes a cascaded filter structure each filter including a multitude of filter taps each including a variable element. The controller dynamically varies a value applied to each of the plurality of variable elements in accordance with frequency response characteristics of the variable element to remove a portion of a self-interference and/or cross-talk interference signal present in a signal received by the device. The device measures the frequency response characteristic of a multitude of communication channels, used in determining the values, via one or more preamble symbols that are jointly transmitted from the first transmit antenna and the second transmit antenna. A second portion of the interference signal is removed by a digital cancellation circuit using a multitude of samples of a transmitted signal.
Public/Granted literature
- US20160226653A1 SELF-INTERFERENCE CANCELLATION FOR MIMO RADIOS Public/Granted day:2016-08-04
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