Transmitter noise cancellation in a multi transmitter-receiver system

US9083582B2 · kind B2 · utility

Assignee

• Analog Devices Global Unlimited Company · BM

Inventors

• Dzianis Lukashevich · Munich, DE
• Patrick Pratt · Mallow, IE

Key dates

• Filing date: Jan 30, 2014
• Grant date: Jul 14, 2015
• Expiry date: Jan 30, 2034

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B1/525
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

In a multi transmitter-receiver system, transmitter noise cancellation may be applied selectively for certain transmitters by exploiting asymmetries of the system. Hence, observation receiver(s) numbering less than the number of transmitters may be provided saving space and cost. Each observation receiver may selectively couple to a transmitter path and estimate the leakage noise from that transmitter. Based on the estimated leakage noise, noise cancellation may be applied to corresponding receiver path(s). Selection of the transmitters for leakage estimation may be based on system conditions at that time, which may be known to the system or may be estimated dynamically.