公开(公告)号：US09490963B2

公开(公告)日：2016-11-08

申请号：US14172805

申请日：2014-02-04

Applicant: Kumu Networks, Inc.

Inventor： Jung-il Choi ,  Steven Hong ,  Mayank Jain ,  Sachin Katti ,  Philip Levis ,  Jeff Mehlman

IPC: H04L5/14 ,  H04L1/00 ,  H04B1/525

CPC classification number: H04L5/1461 ,  H04B1/525 ,  H04L1/0036

Abstract: A circuit that cancels a self-interference signal includes, in part, a pair of signal paths that are substantially in phase, each of which paths includes a passive coupler, a delay element and a variable attenuator. The circuit further includes, in part, a first group of P signal paths each of which is substantially in phase with the pair of paths, a second group of M signal paths each of which is substantially out-of-phase relative to the pair of signal paths, and at least a pair of feedback paths. Each of the P and M signal paths, as well as the feedback paths includes a delay element and a variable attenuator. Optionally, each of the M signal paths is optionally 180° out-of-phase relative to the pair of signal paths.

Abstract translation: 消除自干扰信号的电路部分地包括基本上同相的一对信号路径，其中每个路径包括无源耦合器，延迟元件和可变衰减器。 该电路部分地还包括第一组P信号路径，每个P信号路径基本上与该对路径相同，第二组M个信号路径，每个M个信号路径相对于一对路径基本上是异相的 信号路径和至少一对反馈路径。 P和M信号路径中的每一个以及反馈路径包括延迟元件和可变衰减器。 可选地，M个信号路径中的每一个相对于一对信号路径可选地是180°异相。

公开(公告)号：US09455756B2

公开(公告)日：2016-09-27

申请号：US14690757

申请日：2015-04-20

Applicant: Kumu Networks, Inc.

Inventor： Jung-Il Choi ,  Mayank Jain ,  Joseph Shalizi ,  Jeff Mehlman

IPC: H03D1/04 ,  H03D1/06 ,  H03K5/01 ,  H03K6/04 ,  H04B1/10 ,  H04L1/00 ,  H04L25/08 ,  H04B1/12 ,  H04L5/14 ,  H04L27/26 ,  H04B1/525

CPC classification number: H04B1/12 ,  H04B1/525 ,  H04L5/14 ,  H04L5/143 ,  H04L5/1461 ,  H04L27/2691

Abstract: A system and method for analog self-interference cancellation that includes receiving an RF transmit signal of a full-duplex radio; frequency downconverting the RF transmit signal to an IF transmit signal; transforming the IF transmit signal into an IF self-interference signal using an IF analog self-interference cancelling circuit; frequency upconverting the IF self-interference signal to an RF self-interference signal; and combining the RF self-interference signal with an RF receive signal of the full-duplex radio.

公开(公告)号：US20150043323A1

公开(公告)日：2015-02-12

申请号：US14456320

申请日：2014-08-11

Applicant: Kumu Networks, Inc.

Inventor： Jung-Il Choi ,  Mayank Jain ,  Jeff Mehlman ,  Steven Hong

IPC: G06F17/11 ,  H04B1/62 ,  G06F7/483 ,  H04L5/14

CPC classification number: H04B1/40 ,  G06F7/483 ,  G06F17/11 ,  H04B1/62 ,  H04L5/14 ,  H04L5/143 ,  H04L5/1461

Abstract: A system and method for non-linear digital self-interference cancellation including a pre-processor that generates a first pre-processed digital transmit signal from a digital transmit signal of a full-duplex radio, a non-linear transformer that transforms the first pre-processed digital transmit signal into a non-linear self-interference signal according to a transform configuration, a transform adaptor that sets the transform configuration of the non-linear transformer, and a post-processor that combines the non-linear self-interference signal with a digital receive signal of the full-duplex radio.